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////////////////////////////////////////////////////////////////////// |
//// //// |
//// can_bsp.v //// |
//// //// |
//// //// |
//// This file is part of the CAN Protocol Controller //// |
//// http://www.opencores.org/projects/can/ //// |
//// //// |
//// //// |
//// Author(s): //// |
//// Igor Mohor //// |
//// igorm@opencores.org //// |
//// //// |
//// //// |
//// All additional information is available in the README.txt //// |
//// file. //// |
//// //// |
////////////////////////////////////////////////////////////////////// |
//// //// |
//// Copyright (C) 2002, 2003, 2004 Authors //// |
//// //// |
//// This source file may be used and distributed without //// |
//// restriction provided that this copyright statement is not //// |
//// removed from the file and that any derivative work contains //// |
//// the original copyright notice and the associated disclaimer. //// |
//// //// |
//// This source file is free software; you can redistribute it //// |
//// and/or modify it under the terms of the GNU Lesser General //// |
//// Public License as published by the Free Software Foundation; //// |
//// either version 2.1 of the License, or (at your option) any //// |
//// later version. //// |
//// //// |
//// This source is distributed in the hope that it will be //// |
//// useful, but WITHOUT ANY WARRANTY; without even the implied //// |
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //// |
//// PURPOSE. See the GNU Lesser General Public License for more //// |
//// details. //// |
//// //// |
//// You should have received a copy of the GNU Lesser General //// |
//// Public License along with this source; if not, download it //// |
//// from http://www.opencores.org/lgpl.shtml //// |
//// //// |
//// The CAN protocol is developed by Robert Bosch GmbH and //// |
//// protected by patents. Anybody who wants to implement this //// |
//// CAN IP core on silicon has to obtain a CAN protocol license //// |
//// from Bosch. //// |
//// //// |
////////////////////////////////////////////////////////////////////// |
// |
// CVS Revision History |
// |
// $Log: not supported by cvs2svn $ |
// Revision 1.48 2004/05/12 15:58:41 igorm |
// Core improved to pass all tests with the Bosch VHDL Reference system. |
// |
// Revision 1.47 2004/02/08 14:24:10 mohor |
// Error counters changed. |
// |
// Revision 1.46 2003/10/17 05:55:20 markom |
// mbist signals updated according to newest convention |
// |
// Revision 1.45 2003/09/30 21:14:33 mohor |
// Error counters changed. |
// |
// Revision 1.44 2003/09/30 00:55:12 mohor |
// Error counters fixed to be compatible with Bosch VHDL reference model. |
// Small synchronization changes. |
// |
// Revision 1.43 2003/09/25 18:55:49 mohor |
// Synchronization changed, error counters fixed. |
// |
// Revision 1.42 2003/08/29 07:01:14 mohor |
// When detecting bus-free, signal bus_free_cnt_en was cleared to zero |
// although the last sampled bit was zero instead of one. |
// |
// Revision 1.41 2003/07/18 15:23:31 tadejm |
// Tx and rx length are limited to 8 bytes regardless to the DLC value. |
// |
// Revision 1.40 2003/07/16 15:10:17 mohor |
// Fixed according to the linter. |
// |
// Revision 1.39 2003/07/16 13:12:46 mohor |
// Fixed according to the linter. |
// |
// Revision 1.38 2003/07/10 01:59:04 tadejm |
// Synchronization fixed. In some strange cases it didn't work according to |
// the VHDL reference model. |
// |
// Revision 1.37 2003/07/07 11:21:37 mohor |
// Little fixes (to fix warnings). |
// |
// Revision 1.36 2003/07/03 09:32:20 mohor |
// Synchronization changed. |
// |
// Revision 1.35 2003/06/27 20:56:12 simons |
// Virtual silicon ram instances added. |
// |
// Revision 1.34 2003/06/22 09:43:03 mohor |
// synthesi full_case parallel_case fixed. |
// |
// Revision 1.33 2003/06/21 12:16:30 mohor |
// paralel_case and full_case compiler directives added to case statements. |
// |
// Revision 1.32 2003/06/17 14:28:32 mohor |
// Form error was detected when stuff bit occured at the end of crc. |
// |
// Revision 1.31 2003/06/16 14:31:29 tadejm |
// Bit stuffing corrected when stuffing comes at the end of the crc. |
// |
// Revision 1.30 2003/06/16 13:57:58 mohor |
// tx_point generated one clk earlier. rx_i registered. Data corrected when |
// using extended mode. |
// |
// Revision 1.29 2003/06/11 14:21:35 mohor |
// When switching to tx, sync stage is overjumped. |
// |
// Revision 1.28 2003/03/01 22:53:33 mohor |
// Actel APA ram supported. |
// |
// Revision 1.27 2003/02/20 00:26:02 mohor |
// When a dominant bit was detected at the third bit of the intermission and |
// node had a message to transmit, bit_stuff error could occur. Fixed. |
// |
// Revision 1.26 2003/02/19 23:21:54 mohor |
// When bit error occured while active error flag was transmitted, counter was |
// not incremented. |
// |
// Revision 1.25 2003/02/19 14:44:03 mohor |
// CAN core finished. Host interface added. Registers finished. |
// Synchronization to the wishbone finished. |
// |
// Revision 1.24 2003/02/18 00:10:15 mohor |
// Most of the registers added. Registers "arbitration lost capture", "error code |
// capture" + few more still need to be added. |
// |
// Revision 1.23 2003/02/14 20:17:01 mohor |
// Several registers added. Not finished, yet. |
// |
// Revision 1.22 2003/02/12 14:23:59 mohor |
// abort_tx added. Bit destuff fixed. |
// |
// Revision 1.21 2003/02/11 00:56:06 mohor |
// Wishbone interface added. |
// |
// Revision 1.20 2003/02/10 16:02:11 mohor |
// CAN is working according to the specification. WB interface and more |
// registers (status, IRQ, ...) needs to be added. |
// |
// Revision 1.19 2003/02/09 18:40:29 mohor |
// Overload fixed. Hard synchronization also enabled at the last bit of |
// interframe. |
// |
// Revision 1.18 2003/02/09 02:24:33 mohor |
// Bosch license warning added. Error counters finished. Overload frames |
// still need to be fixed. |
// |
// Revision 1.17 2003/02/04 17:24:41 mohor |
// Backup. |
// |
// Revision 1.16 2003/02/04 14:34:52 mohor |
// *** empty log message *** |
// |
// Revision 1.15 2003/01/31 01:13:37 mohor |
// backup. |
// |
// Revision 1.14 2003/01/16 13:36:19 mohor |
// Form error supported. When receiving messages, last bit of the end-of-frame |
// does not generate form error. Receiver goes to the idle mode one bit sooner. |
// (CAN specification ver 2.0, part B, page 57). |
// |
// Revision 1.13 2003/01/15 21:59:45 mohor |
// Data is stored to fifo at the end of ack stage. |
// |
// Revision 1.12 2003/01/15 21:05:11 mohor |
// CRC checking fixed (when bitstuff occurs at the end of a CRC sequence). |
// |
// Revision 1.11 2003/01/15 14:40:23 mohor |
// RX state machine fixed to receive "remote request" frames correctly. |
// No data bytes are written to fifo when such frames are received. |
// |
// Revision 1.10 2003/01/15 13:16:47 mohor |
// When a frame with "remote request" is received, no data is stored to |
// fifo, just the frame information (identifier, ...). Data length that |
// is stored is the received data length and not the actual data length |
// that is stored to fifo. |
// |
// Revision 1.9 2003/01/14 12:19:35 mohor |
// rx_fifo is now working. |
// |
// Revision 1.8 2003/01/10 17:51:33 mohor |
// Temporary version (backup). |
// |
// Revision 1.7 2003/01/09 21:54:45 mohor |
// rx fifo added. Not 100 % verified, yet. |
// |
// Revision 1.6 2003/01/09 14:46:58 mohor |
// Temporary files (backup). |
// |
// Revision 1.5 2003/01/08 13:30:31 mohor |
// Temp version. |
// |
// Revision 1.4 2003/01/08 02:10:53 mohor |
// Acceptance filter added. |
// |
// Revision 1.3 2002/12/28 04:13:23 mohor |
// Backup version. |
// |
// Revision 1.2 2002/12/27 00:12:52 mohor |
// Header changed, testbench improved to send a frame (crc still missing). |
// |
// Revision 1.1.1.1 2002/12/20 16:39:21 mohor |
// Initial |
// |
// |
// |
|
// synopsys translate_off |
`include "timescale.v" |
// synopsys translate_on |
`include "can_defines.v" |
|
module can_bsp |
( |
clk, |
rst, |
|
sample_point, |
sampled_bit, |
sampled_bit_q, |
tx_point, |
hard_sync, |
|
addr, |
data_in, |
data_out, |
fifo_selected, |
|
|
|
/* Mode register */ |
reset_mode, |
listen_only_mode, |
acceptance_filter_mode, |
self_test_mode, |
|
/* Command register */ |
release_buffer, |
tx_request, |
abort_tx, |
self_rx_request, |
single_shot_transmission, |
tx_state, |
tx_state_q, |
overload_request, |
overload_frame, |
|
/* Arbitration Lost Capture Register */ |
read_arbitration_lost_capture_reg, |
|
/* Error Code Capture Register */ |
read_error_code_capture_reg, |
error_capture_code, |
|
/* Error Warning Limit register */ |
error_warning_limit, |
|
/* Rx Error Counter register */ |
we_rx_err_cnt, |
|
/* Tx Error Counter register */ |
we_tx_err_cnt, |
|
/* Clock Divider register */ |
extended_mode, |
|
rx_idle, |
transmitting, |
transmitter, |
go_rx_inter, |
not_first_bit_of_inter, |
rx_inter, |
set_reset_mode, |
node_bus_off, |
error_status, |
rx_err_cnt, |
tx_err_cnt, |
transmit_status, |
receive_status, |
tx_successful, |
need_to_tx, |
overrun, |
info_empty, |
set_bus_error_irq, |
set_arbitration_lost_irq, |
arbitration_lost_capture, |
node_error_passive, |
node_error_active, |
rx_message_counter, |
|
/* This section is for BASIC and EXTENDED mode */ |
/* Acceptance code register */ |
acceptance_code_0, |
|
/* Acceptance mask register */ |
acceptance_mask_0, |
/* End: This section is for BASIC and EXTENDED mode */ |
|
/* This section is for EXTENDED mode */ |
/* Acceptance code register */ |
acceptance_code_1, |
acceptance_code_2, |
acceptance_code_3, |
|
/* Acceptance mask register */ |
acceptance_mask_1, |
acceptance_mask_2, |
acceptance_mask_3, |
/* End: This section is for EXTENDED mode */ |
|
/* Tx data registers. Holding identifier (basic mode), tx frame information (extended mode) and data */ |
tx_data_0, |
tx_data_1, |
tx_data_2, |
tx_data_3, |
tx_data_4, |
tx_data_5, |
tx_data_6, |
tx_data_7, |
tx_data_8, |
tx_data_9, |
tx_data_10, |
tx_data_11, |
tx_data_12, |
/* End: Tx data registers */ |
|
/* Tx signal */ |
tx, |
tx_next, |
bus_off_on, |
|
go_overload_frame, |
go_error_frame, |
go_tx, |
send_ack |
|
/* Bist */ |
`ifdef CAN_BIST |
, |
mbist_si_i, |
mbist_so_o, |
mbist_ctrl_i |
`endif |
); |
|
parameter Tp = 1; |
|
input clk; |
input rst; |
input sample_point; |
input sampled_bit; |
input sampled_bit_q; |
input tx_point; |
input hard_sync; |
input [7:0] addr; |
input [7:0] data_in; |
output [7:0] data_out; |
input fifo_selected; |
|
input reset_mode; |
input listen_only_mode; |
input acceptance_filter_mode; |
input extended_mode; |
input self_test_mode; |
|
/* Command register */ |
input release_buffer; |
input tx_request; |
input abort_tx; |
input self_rx_request; |
input single_shot_transmission; |
output tx_state; |
output tx_state_q; |
input overload_request; // When receiver is busy, it needs to send overload frame. Only 2 overload frames are allowed to |
output overload_frame; // be send in a row. This is not implemented, yet, because host can not send an overload request. |
|
/* Arbitration Lost Capture Register */ |
input read_arbitration_lost_capture_reg; |
|
/* Error Code Capture Register */ |
input read_error_code_capture_reg; |
output [7:0] error_capture_code; |
|
/* Error Warning Limit register */ |
input [7:0] error_warning_limit; |
|
/* Rx Error Counter register */ |
input we_rx_err_cnt; |
|
/* Tx Error Counter register */ |
input we_tx_err_cnt; |
|
output rx_idle; |
output transmitting; |
output transmitter; |
output go_rx_inter; |
output not_first_bit_of_inter; |
output rx_inter; |
output set_reset_mode; |
output node_bus_off; |
output error_status; |
output [8:0] rx_err_cnt; |
output [8:0] tx_err_cnt; |
output transmit_status; |
output receive_status; |
output tx_successful; |
output need_to_tx; |
output overrun; |
output info_empty; |
output set_bus_error_irq; |
output set_arbitration_lost_irq; |
output [4:0] arbitration_lost_capture; |
output node_error_passive; |
output node_error_active; |
output [6:0] rx_message_counter; |
|
|
/* This section is for BASIC and EXTENDED mode */ |
/* Acceptance code register */ |
input [7:0] acceptance_code_0; |
|
/* Acceptance mask register */ |
input [7:0] acceptance_mask_0; |
|
/* End: This section is for BASIC and EXTENDED mode */ |
|
|
/* This section is for EXTENDED mode */ |
/* Acceptance code register */ |
input [7:0] acceptance_code_1; |
input [7:0] acceptance_code_2; |
input [7:0] acceptance_code_3; |
|
/* Acceptance mask register */ |
input [7:0] acceptance_mask_1; |
input [7:0] acceptance_mask_2; |
input [7:0] acceptance_mask_3; |
/* End: This section is for EXTENDED mode */ |
|
/* Tx data registers. Holding identifier (basic mode), tx frame information (extended mode) and data */ |
input [7:0] tx_data_0; |
input [7:0] tx_data_1; |
input [7:0] tx_data_2; |
input [7:0] tx_data_3; |
input [7:0] tx_data_4; |
input [7:0] tx_data_5; |
input [7:0] tx_data_6; |
input [7:0] tx_data_7; |
input [7:0] tx_data_8; |
input [7:0] tx_data_9; |
input [7:0] tx_data_10; |
input [7:0] tx_data_11; |
input [7:0] tx_data_12; |
/* End: Tx data registers */ |
|
/* Tx signal */ |
output tx; |
output tx_next; |
output bus_off_on; |
|
output go_overload_frame; |
output go_error_frame; |
output go_tx; |
output send_ack; |
|
/* Bist */ |
`ifdef CAN_BIST |
input mbist_si_i; |
output mbist_so_o; |
input [`CAN_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i; // bist chain shift control |
`endif |
|
reg reset_mode_q; |
reg [5:0] bit_cnt; |
|
reg [3:0] data_len; |
reg [28:0] id; |
reg [2:0] bit_stuff_cnt; |
reg [2:0] bit_stuff_cnt_tx; |
reg tx_point_q; |
|
reg rx_idle; |
reg rx_id1; |
reg rx_rtr1; |
reg rx_ide; |
reg rx_id2; |
reg rx_rtr2; |
reg rx_r1; |
reg rx_r0; |
reg rx_dlc; |
reg rx_data; |
reg rx_crc; |
reg rx_crc_lim; |
reg rx_ack; |
reg rx_ack_lim; |
reg rx_eof; |
reg rx_inter; |
reg go_early_tx_latched; |
|
reg rtr1; |
reg ide; |
reg rtr2; |
reg [14:0] crc_in; |
|
reg [7:0] tmp_data; |
reg [7:0] tmp_fifo [0:7]; |
reg write_data_to_tmp_fifo; |
reg [2:0] byte_cnt; |
reg bit_stuff_cnt_en; |
reg crc_enable; |
|
reg [2:0] eof_cnt; |
reg [2:0] passive_cnt; |
|
reg transmitting; |
|
reg error_frame; |
reg error_frame_q; |
reg enable_error_cnt2; |
reg [2:0] error_cnt1; |
reg [2:0] error_cnt2; |
reg [2:0] delayed_dominant_cnt; |
reg enable_overload_cnt2; |
reg overload_frame; |
reg overload_frame_blocked; |
reg [1:0] overload_request_cnt; |
reg [2:0] overload_cnt1; |
reg [2:0] overload_cnt2; |
reg tx; |
reg crc_err; |
|
reg arbitration_lost; |
reg arbitration_lost_q; |
reg [4:0] arbitration_lost_capture; |
reg arbitration_cnt_en; |
reg arbitration_blocked; |
reg tx_q; |
|
reg need_to_tx; // When the CAN core has something to transmit and a dominant bit is sampled at the third bit |
reg [3:0] data_cnt; // Counting the data bytes that are written to FIFO |
reg [2:0] header_cnt; // Counting header length |
reg wr_fifo; // Write data and header to 64-byte fifo |
reg [7:0] data_for_fifo;// Multiplexed data that is stored to 64-byte fifo |
|
reg [5:0] tx_pointer; |
reg tx_bit; |
reg tx_state; |
reg tx_state_q; |
reg transmitter; |
reg finish_msg; |
|
reg [8:0] rx_err_cnt; |
reg [8:0] tx_err_cnt; |
reg rx_err_cnt_blocked; |
reg [3:0] bus_free_cnt; |
reg bus_free_cnt_en; |
reg bus_free; |
reg waiting_for_bus_free; |
|
reg node_error_passive; |
reg node_bus_off; |
reg node_bus_off_q; |
reg ack_err_latched; |
reg bit_err_latched; |
reg stuff_err_latched; |
reg form_err_latched; |
reg rule3_exc1_1; |
reg rule3_exc1_2; |
reg rule3_exc2; |
reg suspend; |
reg susp_cnt_en; |
reg [2:0] susp_cnt; |
reg error_flag_over_latched; |
|
reg [7:0] error_capture_code; |
reg [7:6] error_capture_code_type; |
reg error_capture_code_blocked; |
reg tx_next; |
reg first_compare_bit; |
|
|
wire [4:0] error_capture_code_segment; |
wire error_capture_code_direction; |
|
wire bit_de_stuff; |
wire bit_de_stuff_tx; |
|
wire rule5; |
|
/* Rx state machine */ |
wire go_rx_idle; |
wire go_rx_id1; |
wire go_rx_rtr1; |
wire go_rx_ide; |
wire go_rx_id2; |
wire go_rx_rtr2; |
wire go_rx_r1; |
wire go_rx_r0; |
wire go_rx_dlc; |
wire go_rx_data; |
wire go_rx_crc; |
wire go_rx_crc_lim; |
wire go_rx_ack; |
wire go_rx_ack_lim; |
wire go_rx_eof; |
wire go_rx_inter; |
|
wire last_bit_of_inter; |
|
wire go_crc_enable; |
wire rst_crc_enable; |
|
wire bit_de_stuff_set; |
wire bit_de_stuff_reset; |
|
wire go_early_tx; |
|
wire [14:0] calculated_crc; |
wire [15:0] r_calculated_crc; |
wire remote_rq; |
wire [3:0] limited_data_len; |
wire form_err; |
|
wire error_frame_ended; |
wire overload_frame_ended; |
wire bit_err; |
wire ack_err; |
wire stuff_err; |
|
wire id_ok; // If received ID matches ID set in registers |
wire no_byte0; // There is no byte 0 (RTR bit set to 1 or DLC field equal to 0). Signal used for acceptance filter. |
wire no_byte1; // There is no byte 1 (RTR bit set to 1 or DLC field equal to 1). Signal used for acceptance filter. |
|
wire [2:0] header_len; |
wire storing_header; |
wire [3:0] limited_data_len_minus1; |
wire reset_wr_fifo; |
wire err; |
|
wire arbitration_field; |
|
wire [18:0] basic_chain; |
wire [63:0] basic_chain_data; |
wire [18:0] extended_chain_std; |
wire [38:0] extended_chain_ext; |
wire [63:0] extended_chain_data_std; |
wire [63:0] extended_chain_data_ext; |
|
wire rst_tx_pointer; |
|
wire [7:0] r_tx_data_0; |
wire [7:0] r_tx_data_1; |
wire [7:0] r_tx_data_2; |
wire [7:0] r_tx_data_3; |
wire [7:0] r_tx_data_4; |
wire [7:0] r_tx_data_5; |
wire [7:0] r_tx_data_6; |
wire [7:0] r_tx_data_7; |
wire [7:0] r_tx_data_8; |
wire [7:0] r_tx_data_9; |
wire [7:0] r_tx_data_10; |
wire [7:0] r_tx_data_11; |
wire [7:0] r_tx_data_12; |
|
wire send_ack; |
wire bit_err_exc1; |
wire bit_err_exc2; |
wire bit_err_exc3; |
wire bit_err_exc4; |
wire bit_err_exc5; |
wire bit_err_exc6; |
wire error_flag_over; |
wire overload_flag_over; |
|
wire [5:0] limited_tx_cnt_ext; |
wire [5:0] limited_tx_cnt_std; |
|
assign go_rx_idle = sample_point & sampled_bit & last_bit_of_inter | bus_free & (~node_bus_off); |
assign go_rx_id1 = sample_point & (~sampled_bit) & (rx_idle | last_bit_of_inter); |
assign go_rx_rtr1 = (~bit_de_stuff) & sample_point & rx_id1 & (bit_cnt[3:0] == 4'd10); |
assign go_rx_ide = (~bit_de_stuff) & sample_point & rx_rtr1; |
assign go_rx_id2 = (~bit_de_stuff) & sample_point & rx_ide & sampled_bit; |
assign go_rx_rtr2 = (~bit_de_stuff) & sample_point & rx_id2 & (bit_cnt[4:0] == 5'd17); |
assign go_rx_r1 = (~bit_de_stuff) & sample_point & rx_rtr2; |
assign go_rx_r0 = (~bit_de_stuff) & sample_point & (rx_ide & (~sampled_bit) | rx_r1); |
assign go_rx_dlc = (~bit_de_stuff) & sample_point & rx_r0; |
assign go_rx_data = (~bit_de_stuff) & sample_point & rx_dlc & (bit_cnt[1:0] == 2'd3) & (sampled_bit | (|data_len[2:0])) & (~remote_rq); |
assign go_rx_crc = (~bit_de_stuff) & sample_point & (rx_dlc & (bit_cnt[1:0] == 2'd3) & ((~sampled_bit) & (~(|data_len[2:0])) | remote_rq) | |
rx_data & (bit_cnt[5:0] == ((limited_data_len<<3) - 1'b1))); // overflow works ok at max value (8<<3 = 64 = 0). 0-1 = 6'h3f |
assign go_rx_crc_lim = (~bit_de_stuff) & sample_point & rx_crc & (bit_cnt[3:0] == 4'd14); |
assign go_rx_ack = (~bit_de_stuff) & sample_point & rx_crc_lim; |
assign go_rx_ack_lim = sample_point & rx_ack; |
assign go_rx_eof = sample_point & rx_ack_lim; |
assign go_rx_inter = ((sample_point & rx_eof & (eof_cnt == 3'd6)) | error_frame_ended | overload_frame_ended) & (~overload_request); |
|
assign go_error_frame = (form_err | stuff_err | bit_err | ack_err | (crc_err & go_rx_eof)); |
assign error_frame_ended = (error_cnt2 == 3'd7) & tx_point; |
assign overload_frame_ended = (overload_cnt2 == 3'd7) & tx_point; |
|
assign go_overload_frame = ( sample_point & ((~sampled_bit) | overload_request) & (rx_eof & (~transmitter) & (eof_cnt == 3'd6) | error_frame_ended | overload_frame_ended) | |
sample_point & (~sampled_bit) & rx_inter & (bit_cnt[1:0] < 2'd2) | |
sample_point & (~sampled_bit) & ((error_cnt2 == 3'd7) | (overload_cnt2 == 3'd7)) |
) |
& (~overload_frame_blocked) |
; |
|
|
assign go_crc_enable = hard_sync | go_tx; |
assign rst_crc_enable = go_rx_crc; |
|
assign bit_de_stuff_set = go_rx_id1 & (~go_error_frame); |
assign bit_de_stuff_reset = go_rx_ack | reset_mode | go_error_frame | go_overload_frame; |
|
assign remote_rq = ((~ide) & rtr1) | (ide & rtr2); |
assign limited_data_len = (data_len < 4'h8)? data_len : 4'h8; |
|
assign ack_err = rx_ack & sample_point & sampled_bit & tx_state & (~self_test_mode); |
assign bit_err = (tx_state | error_frame | overload_frame | rx_ack) & sample_point & (tx != sampled_bit) & (~bit_err_exc1) & (~bit_err_exc2) & (~bit_err_exc3) & (~bit_err_exc4) & (~bit_err_exc5) & (~bit_err_exc6); |
assign bit_err_exc1 = tx_state & arbitration_field & tx; |
assign bit_err_exc2 = rx_ack & tx; |
assign bit_err_exc3 = error_frame & node_error_passive & (error_cnt1 < 3'd7); |
assign bit_err_exc4 = (error_frame & (error_cnt1 == 3'd7) & (~enable_error_cnt2)) | (overload_frame & (overload_cnt1 == 3'd7) & (~enable_overload_cnt2)); |
assign bit_err_exc5 = (error_frame & (error_cnt2 == 3'd7)) | (overload_frame & (overload_cnt2 == 3'd7)); |
assign bit_err_exc6 = (eof_cnt == 3'd6) & rx_eof & (~transmitter); |
|
assign arbitration_field = rx_id1 | rx_rtr1 | rx_ide | rx_id2 | rx_rtr2; |
|
assign last_bit_of_inter = rx_inter & (bit_cnt[1:0] == 2'd2); |
assign not_first_bit_of_inter = rx_inter & (bit_cnt[1:0] != 2'd0); |
|
|
// Rx idle state |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_idle <= 1'b0; |
else if (reset_mode | go_rx_id1 | go_error_frame) |
rx_idle <=#Tp 1'b0; |
else if (go_rx_idle) |
rx_idle <=#Tp 1'b1; |
end |
|
|
// Rx id1 state |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_id1 <= 1'b0; |
else if (reset_mode | go_rx_rtr1 | go_error_frame) |
rx_id1 <=#Tp 1'b0; |
else if (go_rx_id1) |
rx_id1 <=#Tp 1'b1; |
end |
|
|
// Rx rtr1 state |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_rtr1 <= 1'b0; |
else if (reset_mode | go_rx_ide | go_error_frame) |
rx_rtr1 <=#Tp 1'b0; |
else if (go_rx_rtr1) |
rx_rtr1 <=#Tp 1'b1; |
end |
|
|
// Rx ide state |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_ide <= 1'b0; |
else if (reset_mode | go_rx_r0 | go_rx_id2 | go_error_frame) |
rx_ide <=#Tp 1'b0; |
else if (go_rx_ide) |
rx_ide <=#Tp 1'b1; |
end |
|
|
// Rx id2 state |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_id2 <= 1'b0; |
else if (reset_mode | go_rx_rtr2 | go_error_frame) |
rx_id2 <=#Tp 1'b0; |
else if (go_rx_id2) |
rx_id2 <=#Tp 1'b1; |
end |
|
|
// Rx rtr2 state |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_rtr2 <= 1'b0; |
else if (reset_mode | go_rx_r1 | go_error_frame) |
rx_rtr2 <=#Tp 1'b0; |
else if (go_rx_rtr2) |
rx_rtr2 <=#Tp 1'b1; |
end |
|
|
// Rx r0 state |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_r1 <= 1'b0; |
else if (reset_mode | go_rx_r0 | go_error_frame) |
rx_r1 <=#Tp 1'b0; |
else if (go_rx_r1) |
rx_r1 <=#Tp 1'b1; |
end |
|
|
// Rx r0 state |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_r0 <= 1'b0; |
else if (reset_mode | go_rx_dlc | go_error_frame) |
rx_r0 <=#Tp 1'b0; |
else if (go_rx_r0) |
rx_r0 <=#Tp 1'b1; |
end |
|
|
// Rx dlc state |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_dlc <= 1'b0; |
else if (reset_mode | go_rx_data | go_rx_crc | go_error_frame) |
rx_dlc <=#Tp 1'b0; |
else if (go_rx_dlc) |
rx_dlc <=#Tp 1'b1; |
end |
|
|
// Rx data state |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_data <= 1'b0; |
else if (reset_mode | go_rx_crc | go_error_frame) |
rx_data <=#Tp 1'b0; |
else if (go_rx_data) |
rx_data <=#Tp 1'b1; |
end |
|
|
// Rx crc state |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_crc <= 1'b0; |
else if (reset_mode | go_rx_crc_lim | go_error_frame) |
rx_crc <=#Tp 1'b0; |
else if (go_rx_crc) |
rx_crc <=#Tp 1'b1; |
end |
|
|
// Rx crc delimiter state |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_crc_lim <= 1'b0; |
else if (reset_mode | go_rx_ack | go_error_frame) |
rx_crc_lim <=#Tp 1'b0; |
else if (go_rx_crc_lim) |
rx_crc_lim <=#Tp 1'b1; |
end |
|
|
// Rx ack state |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_ack <= 1'b0; |
else if (reset_mode | go_rx_ack_lim | go_error_frame) |
rx_ack <=#Tp 1'b0; |
else if (go_rx_ack) |
rx_ack <=#Tp 1'b1; |
end |
|
|
// Rx ack delimiter state |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_ack_lim <= 1'b0; |
else if (reset_mode | go_rx_eof | go_error_frame) |
rx_ack_lim <=#Tp 1'b0; |
else if (go_rx_ack_lim) |
rx_ack_lim <=#Tp 1'b1; |
end |
|
|
// Rx eof state |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_eof <= 1'b0; |
else if (go_rx_inter | go_error_frame | go_overload_frame) |
rx_eof <=#Tp 1'b0; |
else if (go_rx_eof) |
rx_eof <=#Tp 1'b1; |
end |
|
|
|
// Interframe space |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_inter <= 1'b0; |
else if (reset_mode | go_rx_idle | go_rx_id1 | go_overload_frame | go_error_frame) |
rx_inter <=#Tp 1'b0; |
else if (go_rx_inter) |
rx_inter <=#Tp 1'b1; |
end |
|
|
// ID register |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
id <= 29'h0; |
else if (sample_point & (rx_id1 | rx_id2) & (~bit_de_stuff)) |
id <=#Tp {id[27:0], sampled_bit}; |
end |
|
|
// rtr1 bit |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rtr1 <= 1'b0; |
else if (sample_point & rx_rtr1 & (~bit_de_stuff)) |
rtr1 <=#Tp sampled_bit; |
end |
|
|
// rtr2 bit |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rtr2 <= 1'b0; |
else if (sample_point & rx_rtr2 & (~bit_de_stuff)) |
rtr2 <=#Tp sampled_bit; |
end |
|
|
// ide bit |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
ide <= 1'b0; |
else if (sample_point & rx_ide & (~bit_de_stuff)) |
ide <=#Tp sampled_bit; |
end |
|
|
// Data length |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
data_len <= 4'b0; |
else if (sample_point & rx_dlc & (~bit_de_stuff)) |
data_len <=#Tp {data_len[2:0], sampled_bit}; |
end |
|
|
// Data |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
tmp_data <= 8'h0; |
else if (sample_point & rx_data & (~bit_de_stuff)) |
tmp_data <=#Tp {tmp_data[6:0], sampled_bit}; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
write_data_to_tmp_fifo <= 1'b0; |
else if (sample_point & rx_data & (~bit_de_stuff) & (&bit_cnt[2:0])) |
write_data_to_tmp_fifo <=#Tp 1'b1; |
else |
write_data_to_tmp_fifo <=#Tp 1'b0; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
byte_cnt <= 3'h0; |
else if (write_data_to_tmp_fifo) |
byte_cnt <=#Tp byte_cnt + 1'b1; |
else if (reset_mode | (sample_point & go_rx_crc_lim)) |
byte_cnt <=#Tp 3'h0; |
end |
|
|
always @ (posedge clk) |
begin |
if (write_data_to_tmp_fifo) |
tmp_fifo[byte_cnt] <=#Tp tmp_data; |
end |
|
|
|
// CRC |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
crc_in <= 15'h0; |
else if (sample_point & rx_crc & (~bit_de_stuff)) |
crc_in <=#Tp {crc_in[13:0], sampled_bit}; |
end |
|
|
// bit_cnt |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
bit_cnt <= 6'd0; |
else if (go_rx_id1 | go_rx_id2 | go_rx_dlc | go_rx_data | go_rx_crc | |
go_rx_ack | go_rx_eof | go_rx_inter | go_error_frame | go_overload_frame) |
bit_cnt <=#Tp 6'd0; |
else if (sample_point & (~bit_de_stuff)) |
bit_cnt <=#Tp bit_cnt + 1'b1; |
end |
|
|
// eof_cnt |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
eof_cnt <= 3'd0; |
else if (sample_point) |
begin |
if (reset_mode | go_rx_inter | go_error_frame | go_overload_frame) |
eof_cnt <=#Tp 3'd0; |
else if (rx_eof) |
eof_cnt <=#Tp eof_cnt + 1'b1; |
end |
end |
|
|
// Enabling bit de-stuffing |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
bit_stuff_cnt_en <= 1'b0; |
else if (bit_de_stuff_set) |
bit_stuff_cnt_en <=#Tp 1'b1; |
else if (bit_de_stuff_reset) |
bit_stuff_cnt_en <=#Tp 1'b0; |
end |
|
|
// bit_stuff_cnt |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
bit_stuff_cnt <= 3'h1; |
else if (bit_de_stuff_reset) |
bit_stuff_cnt <=#Tp 3'h1; |
else if (sample_point & bit_stuff_cnt_en) |
begin |
if (bit_stuff_cnt == 3'h5) |
bit_stuff_cnt <=#Tp 3'h1; |
else if (sampled_bit == sampled_bit_q) |
bit_stuff_cnt <=#Tp bit_stuff_cnt + 1'b1; |
else |
bit_stuff_cnt <=#Tp 3'h1; |
end |
end |
|
|
// bit_stuff_cnt_tx |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
bit_stuff_cnt_tx <= 3'h1; |
else if (bit_de_stuff_reset) |
bit_stuff_cnt_tx <=#Tp 3'h1; |
else if (tx_point_q & bit_stuff_cnt_en) |
begin |
if (bit_stuff_cnt_tx == 3'h5) |
bit_stuff_cnt_tx <=#Tp 3'h1; |
else if (tx == tx_q) |
bit_stuff_cnt_tx <=#Tp bit_stuff_cnt_tx + 1'b1; |
else |
bit_stuff_cnt_tx <=#Tp 3'h1; |
end |
end |
|
|
assign bit_de_stuff = bit_stuff_cnt == 3'h5; |
assign bit_de_stuff_tx = bit_stuff_cnt_tx == 3'h5; |
|
|
|
// stuff_err |
assign stuff_err = sample_point & bit_stuff_cnt_en & bit_de_stuff & (sampled_bit == sampled_bit_q); |
|
|
|
// Generating delayed signals |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
begin |
reset_mode_q <=#Tp 1'b0; |
node_bus_off_q <=#Tp 1'b0; |
end |
else |
begin |
reset_mode_q <=#Tp reset_mode; |
node_bus_off_q <=#Tp node_bus_off; |
end |
end |
|
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
crc_enable <= 1'b0; |
else if (go_crc_enable) |
crc_enable <=#Tp 1'b1; |
else if (reset_mode | rst_crc_enable) |
crc_enable <=#Tp 1'b0; |
end |
|
|
// CRC error generation |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
crc_err <= 1'b0; |
else if (go_rx_ack) |
crc_err <=#Tp crc_in != calculated_crc; |
else if (reset_mode | error_frame_ended) |
crc_err <=#Tp 1'b0; |
end |
|
|
// Conditions for form error |
assign form_err = sample_point & ( ((~bit_de_stuff) & rx_crc_lim & (~sampled_bit) ) | |
( rx_ack_lim & (~sampled_bit) ) | |
((eof_cnt < 3'd6)& rx_eof & (~sampled_bit) & (~transmitter) ) | |
( & rx_eof & (~sampled_bit) & transmitter ) |
); |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
ack_err_latched <= 1'b0; |
else if (reset_mode | error_frame_ended | go_overload_frame) |
ack_err_latched <=#Tp 1'b0; |
else if (ack_err) |
ack_err_latched <=#Tp 1'b1; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
bit_err_latched <= 1'b0; |
else if (reset_mode | error_frame_ended | go_overload_frame) |
bit_err_latched <=#Tp 1'b0; |
else if (bit_err) |
bit_err_latched <=#Tp 1'b1; |
end |
|
|
|
// Rule 5 (Fault confinement). |
assign rule5 = bit_err & ( (~node_error_passive) & error_frame & (error_cnt1 < 3'd7) |
| |
overload_frame & (overload_cnt1 < 3'd7) |
); |
|
// Rule 3 exception 1 - first part (Fault confinement). |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rule3_exc1_1 <= 1'b0; |
else if (reset_mode | error_flag_over | rule3_exc1_2) |
rule3_exc1_1 <=#Tp 1'b0; |
else if (transmitter & node_error_passive & ack_err) |
rule3_exc1_1 <=#Tp 1'b1; |
end |
|
|
// Rule 3 exception 1 - second part (Fault confinement). |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rule3_exc1_2 <= 1'b0; |
else if (reset_mode | go_error_frame | rule3_exc1_2) |
rule3_exc1_2 <=#Tp 1'b0; |
else if (rule3_exc1_1 & (error_cnt1 < 3'd7) & sample_point & (~sampled_bit)) |
rule3_exc1_2 <=#Tp 1'b1; |
end |
|
|
// Rule 3 exception 2 (Fault confinement). |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rule3_exc2 <= 1'b0; |
else if (reset_mode | error_flag_over) |
rule3_exc2 <=#Tp 1'b0; |
else if (transmitter & stuff_err & arbitration_field & sample_point & tx & (~sampled_bit)) |
rule3_exc2 <=#Tp 1'b1; |
end |
|
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
stuff_err_latched <= 1'b0; |
else if (reset_mode | error_frame_ended | go_overload_frame) |
stuff_err_latched <=#Tp 1'b0; |
else if (stuff_err) |
stuff_err_latched <=#Tp 1'b1; |
end |
|
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
form_err_latched <= 1'b0; |
else if (reset_mode | error_frame_ended | go_overload_frame) |
form_err_latched <=#Tp 1'b0; |
else if (form_err) |
form_err_latched <=#Tp 1'b1; |
end |
|
|
|
// Instantiation of the RX CRC module |
can_crc i_can_crc_rx |
( |
.clk(clk), |
.data(sampled_bit), |
.enable(crc_enable & sample_point & (~bit_de_stuff)), |
.initialize(go_crc_enable), |
.crc(calculated_crc) |
); |
|
|
|
|
assign no_byte0 = rtr1 | (data_len<4'h1); |
assign no_byte1 = rtr1 | (data_len<4'h2); |
|
can_acf i_can_acf |
( |
.clk(clk), |
.rst(rst), |
|
.id(id), |
|
/* Mode register */ |
.reset_mode(reset_mode), |
.acceptance_filter_mode(acceptance_filter_mode), |
|
// Clock Divider register |
.extended_mode(extended_mode), |
|
/* This section is for BASIC and EXTENDED mode */ |
/* Acceptance code register */ |
.acceptance_code_0(acceptance_code_0), |
|
/* Acceptance mask register */ |
.acceptance_mask_0(acceptance_mask_0), |
/* End: This section is for BASIC and EXTENDED mode */ |
|
/* This section is for EXTENDED mode */ |
/* Acceptance code register */ |
.acceptance_code_1(acceptance_code_1), |
.acceptance_code_2(acceptance_code_2), |
.acceptance_code_3(acceptance_code_3), |
|
/* Acceptance mask register */ |
.acceptance_mask_1(acceptance_mask_1), |
.acceptance_mask_2(acceptance_mask_2), |
.acceptance_mask_3(acceptance_mask_3), |
/* End: This section is for EXTENDED mode */ |
|
.go_rx_crc_lim(go_rx_crc_lim), |
.go_rx_inter(go_rx_inter), |
.go_error_frame(go_error_frame), |
|
.data0(tmp_fifo[0]), |
.data1(tmp_fifo[1]), |
.rtr1(rtr1), |
.rtr2(rtr2), |
.ide(ide), |
.no_byte0(no_byte0), |
.no_byte1(no_byte1), |
|
.id_ok(id_ok) |
|
); |
|
|
|
|
assign header_len[2:0] = extended_mode ? (ide? (3'h5) : (3'h3)) : 3'h2; |
assign storing_header = header_cnt < header_len; |
assign limited_data_len_minus1[3:0] = remote_rq? 4'hf : ((data_len < 4'h8)? (data_len -1'b1) : 4'h7); // - 1 because counter counts from 0 |
assign reset_wr_fifo = (data_cnt == (limited_data_len_minus1 + {1'b0, header_len})) | reset_mode; |
|
assign err = form_err | stuff_err | bit_err | ack_err | form_err_latched | stuff_err_latched | bit_err_latched | ack_err_latched | crc_err; |
|
|
|
// Write enable signal for 64-byte rx fifo |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
wr_fifo <= 1'b0; |
else if (reset_wr_fifo) |
wr_fifo <=#Tp 1'b0; |
else if (go_rx_inter & id_ok & (~error_frame_ended) & ((~tx_state) | self_rx_request)) |
wr_fifo <=#Tp 1'b1; |
end |
|
|
// Header counter. Header length depends on the mode of operation and frame format. |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
header_cnt <= 3'h0; |
else if (reset_wr_fifo) |
header_cnt <=#Tp 3'h0; |
else if (wr_fifo & storing_header) |
header_cnt <=#Tp header_cnt + 1'h1; |
end |
|
|
// Data counter. Length of the data is limited to 8 bytes. |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
data_cnt <= 4'h0; |
else if (reset_wr_fifo) |
data_cnt <=#Tp 4'h0; |
else if (wr_fifo) |
data_cnt <=#Tp data_cnt + 4'h1; |
end |
|
|
// Multiplexing data that is stored to 64-byte fifo depends on the mode of operation and frame format |
always @ (extended_mode or ide or data_cnt or header_cnt or header_len or |
storing_header or id or rtr1 or rtr2 or data_len or |
tmp_fifo[0] or tmp_fifo[2] or tmp_fifo[4] or tmp_fifo[6] or |
tmp_fifo[1] or tmp_fifo[3] or tmp_fifo[5] or tmp_fifo[7]) |
begin |
casex ({storing_header, extended_mode, ide, header_cnt}) /* synthesis parallel_case */ |
6'b1_1_1_000 : data_for_fifo = {1'b1, rtr2, 2'h0, data_len}; // extended mode, extended format header |
6'b1_1_1_001 : data_for_fifo = id[28:21]; // extended mode, extended format header |
6'b1_1_1_010 : data_for_fifo = id[20:13]; // extended mode, extended format header |
6'b1_1_1_011 : data_for_fifo = id[12:5]; // extended mode, extended format header |
6'b1_1_1_100 : data_for_fifo = {id[4:0], 3'h0}; // extended mode, extended format header |
6'b1_1_0_000 : data_for_fifo = {1'b0, rtr1, 2'h0, data_len}; // extended mode, standard format header |
6'b1_1_0_001 : data_for_fifo = id[10:3]; // extended mode, standard format header |
6'b1_1_0_010 : data_for_fifo = {id[2:0], rtr1, 4'h0}; // extended mode, standard format header |
6'b1_0_x_000 : data_for_fifo = id[10:3]; // normal mode header |
6'b1_0_x_001 : data_for_fifo = {id[2:0], rtr1, data_len}; // normal mode header |
default : data_for_fifo = tmp_fifo[data_cnt - {1'b0, header_len}]; // data |
endcase |
end |
|
|
|
|
// Instantiation of the RX fifo module |
can_fifo i_can_fifo |
( |
.clk(clk), |
.rst(rst), |
|
.wr(wr_fifo), |
|
.data_in(data_for_fifo), |
.addr(addr[5:0]), |
.data_out(data_out), |
.fifo_selected(fifo_selected), |
|
.reset_mode(reset_mode), |
.release_buffer(release_buffer), |
.extended_mode(extended_mode), |
.overrun(overrun), |
.info_empty(info_empty), |
.info_cnt(rx_message_counter) |
|
`ifdef CAN_BIST |
, |
.mbist_si_i(mbist_si_i), |
.mbist_so_o(mbist_so_o), |
.mbist_ctrl_i(mbist_ctrl_i) |
`endif |
); |
|
|
// Transmitting error frame. |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
error_frame <= 1'b0; |
else if (reset_mode | error_frame_ended | go_overload_frame) |
error_frame <=#Tp 1'b0; |
else if (go_error_frame) |
error_frame <=#Tp 1'b1; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
error_frame_q <=#Tp 1'b0; |
else if (sample_point) |
error_frame_q <=#Tp error_frame; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
error_cnt1 <= 3'd0; |
else if (reset_mode | error_frame_ended | go_error_frame | go_overload_frame) |
error_cnt1 <=#Tp 3'd0; |
else if (error_frame & tx_point & (error_cnt1 < 3'd7)) |
error_cnt1 <=#Tp error_cnt1 + 1'b1; |
end |
|
|
|
assign error_flag_over = ((~node_error_passive) & sample_point & (error_cnt1 == 3'd7) | node_error_passive & sample_point & (passive_cnt == 3'h6)) & (~enable_error_cnt2); |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
error_flag_over_latched <= 1'b0; |
else if (reset_mode | error_frame_ended | go_error_frame | go_overload_frame) |
error_flag_over_latched <=#Tp 1'b0; |
else if (error_flag_over) |
error_flag_over_latched <=#Tp 1'b1; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
enable_error_cnt2 <= 1'b0; |
else if (reset_mode | error_frame_ended | go_error_frame | go_overload_frame) |
enable_error_cnt2 <=#Tp 1'b0; |
else if (error_frame & (error_flag_over & sampled_bit)) |
enable_error_cnt2 <=#Tp 1'b1; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
error_cnt2 <= 3'd0; |
else if (reset_mode | error_frame_ended | go_error_frame | go_overload_frame) |
error_cnt2 <=#Tp 3'd0; |
else if (enable_error_cnt2 & tx_point) |
error_cnt2 <=#Tp error_cnt2 + 1'b1; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
delayed_dominant_cnt <= 3'h0; |
else if (reset_mode | enable_error_cnt2 | go_error_frame | enable_overload_cnt2 | go_overload_frame) |
delayed_dominant_cnt <=#Tp 3'h0; |
else if (sample_point & (~sampled_bit) & ((error_cnt1 == 3'd7) | (overload_cnt1 == 3'd7))) |
delayed_dominant_cnt <=#Tp delayed_dominant_cnt + 1'b1; |
end |
|
|
// passive_cnt |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
passive_cnt <= 3'h1; |
else if (reset_mode | error_frame_ended | go_error_frame | go_overload_frame | first_compare_bit) |
passive_cnt <=#Tp 3'h1; |
else if (sample_point & (passive_cnt < 3'h6)) |
begin |
if (error_frame & (~enable_error_cnt2) & (sampled_bit == sampled_bit_q)) |
passive_cnt <=#Tp passive_cnt + 1'b1; |
else |
passive_cnt <=#Tp 3'h1; |
end |
end |
|
|
// When comparing 6 equal bits, first is always equal |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
first_compare_bit <= 1'b0; |
else if (go_error_frame) |
first_compare_bit <=#Tp 1'b1; |
else if (sample_point) |
first_compare_bit <= 1'b0; |
end |
|
|
// Transmitting overload frame. |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
overload_frame <= 1'b0; |
else if (reset_mode | overload_frame_ended | go_error_frame) |
overload_frame <=#Tp 1'b0; |
else if (go_overload_frame) |
overload_frame <=#Tp 1'b1; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
overload_cnt1 <= 3'd0; |
else if (reset_mode | overload_frame_ended | go_error_frame | go_overload_frame) |
overload_cnt1 <=#Tp 3'd0; |
else if (overload_frame & tx_point & (overload_cnt1 < 3'd7)) |
overload_cnt1 <=#Tp overload_cnt1 + 1'b1; |
end |
|
|
assign overload_flag_over = sample_point & (overload_cnt1 == 3'd7) & (~enable_overload_cnt2); |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
enable_overload_cnt2 <= 1'b0; |
else if (reset_mode | overload_frame_ended | go_error_frame | go_overload_frame) |
enable_overload_cnt2 <=#Tp 1'b0; |
else if (overload_frame & (overload_flag_over & sampled_bit)) |
enable_overload_cnt2 <=#Tp 1'b1; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
overload_cnt2 <= 3'd0; |
else if (reset_mode | overload_frame_ended | go_error_frame | go_overload_frame) |
overload_cnt2 <=#Tp 3'd0; |
else if (enable_overload_cnt2 & tx_point) |
overload_cnt2 <=#Tp overload_cnt2 + 1'b1; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
overload_request_cnt <= 2'b0; |
else if (reset_mode | go_error_frame | go_rx_id1) |
overload_request_cnt <=#Tp 2'b0; |
else if (overload_request & overload_frame) |
overload_request_cnt <=#Tp overload_request_cnt + 1'b1; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
overload_frame_blocked <= 1'b0; |
else if (reset_mode | go_error_frame | go_rx_id1) |
overload_frame_blocked <=#Tp 1'b0; |
else if (overload_request & overload_frame & overload_request_cnt == 2'h2) // This is a second sequential overload_request |
overload_frame_blocked <=#Tp 1'b1; |
end |
|
|
assign send_ack = (~tx_state) & rx_ack & (~err) & (~listen_only_mode); |
|
|
|
always @ (reset_mode or node_bus_off or tx_state or go_tx or bit_de_stuff_tx or tx_bit or tx_q or |
send_ack or go_overload_frame or overload_frame or overload_cnt1 or |
go_error_frame or error_frame or error_cnt1 or node_error_passive) |
begin |
if (reset_mode | node_bus_off) // Reset or node_bus_off |
tx_next = 1'b1; |
else |
begin |
if (go_error_frame | error_frame) // Transmitting error frame |
begin |
if (error_cnt1 < 3'd6) |
begin |
if (node_error_passive) |
tx_next = 1'b1; |
else |
tx_next = 1'b0; |
end |
else |
tx_next = 1'b1; |
end |
else if (go_overload_frame | overload_frame) // Transmitting overload frame |
begin |
if (overload_cnt1 < 3'd6) |
tx_next = 1'b0; |
else |
tx_next = 1'b1; |
end |
else if (go_tx | tx_state) // Transmitting message |
tx_next = ((~bit_de_stuff_tx) & tx_bit) | (bit_de_stuff_tx & (~tx_q)); |
else if (send_ack) // Acknowledge |
tx_next = 1'b0; |
else |
tx_next = 1'b1; |
end |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
tx <= 1'b1; |
else if (tx_point) |
tx <=#Tp tx_next; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
tx_q <=#Tp 1'b0; |
else if (tx_point) |
tx_q <=#Tp tx & (~go_early_tx_latched); |
end |
|
|
/* Delayed tx point */ |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
tx_point_q <=#Tp 1'b0; |
else |
tx_point_q <=#Tp tx_point; |
end |
|
|
/* Changing bit order from [7:0] to [0:7] */ |
can_ibo i_ibo_tx_data_0 (.di(tx_data_0), .do(r_tx_data_0)); |
can_ibo i_ibo_tx_data_1 (.di(tx_data_1), .do(r_tx_data_1)); |
can_ibo i_ibo_tx_data_2 (.di(tx_data_2), .do(r_tx_data_2)); |
can_ibo i_ibo_tx_data_3 (.di(tx_data_3), .do(r_tx_data_3)); |
can_ibo i_ibo_tx_data_4 (.di(tx_data_4), .do(r_tx_data_4)); |
can_ibo i_ibo_tx_data_5 (.di(tx_data_5), .do(r_tx_data_5)); |
can_ibo i_ibo_tx_data_6 (.di(tx_data_6), .do(r_tx_data_6)); |
can_ibo i_ibo_tx_data_7 (.di(tx_data_7), .do(r_tx_data_7)); |
can_ibo i_ibo_tx_data_8 (.di(tx_data_8), .do(r_tx_data_8)); |
can_ibo i_ibo_tx_data_9 (.di(tx_data_9), .do(r_tx_data_9)); |
can_ibo i_ibo_tx_data_10 (.di(tx_data_10), .do(r_tx_data_10)); |
can_ibo i_ibo_tx_data_11 (.di(tx_data_11), .do(r_tx_data_11)); |
can_ibo i_ibo_tx_data_12 (.di(tx_data_12), .do(r_tx_data_12)); |
|
/* Changing bit order from [14:0] to [0:14] */ |
can_ibo i_calculated_crc0 (.di(calculated_crc[14:7]), .do(r_calculated_crc[7:0])); |
can_ibo i_calculated_crc1 (.di({calculated_crc[6:0], 1'b0}), .do(r_calculated_crc[15:8])); |
|
|
assign basic_chain = {r_tx_data_1[7:4], 2'h0, r_tx_data_1[3:0], r_tx_data_0[7:0], 1'b0}; |
assign basic_chain_data = {r_tx_data_9, r_tx_data_8, r_tx_data_7, r_tx_data_6, r_tx_data_5, r_tx_data_4, r_tx_data_3, r_tx_data_2}; |
assign extended_chain_std = {r_tx_data_0[7:4], 2'h0, r_tx_data_0[1], r_tx_data_2[2:0], r_tx_data_1[7:0], 1'b0}; |
assign extended_chain_ext = {r_tx_data_0[7:4], 2'h0, r_tx_data_0[1], r_tx_data_4[4:0], r_tx_data_3[7:0], r_tx_data_2[7:3], 1'b1, 1'b1, r_tx_data_2[2:0], r_tx_data_1[7:0], 1'b0}; |
assign extended_chain_data_std = {r_tx_data_10, r_tx_data_9, r_tx_data_8, r_tx_data_7, r_tx_data_6, r_tx_data_5, r_tx_data_4, r_tx_data_3}; |
assign extended_chain_data_ext = {r_tx_data_12, r_tx_data_11, r_tx_data_10, r_tx_data_9, r_tx_data_8, r_tx_data_7, r_tx_data_6, r_tx_data_5}; |
|
always @ (extended_mode or rx_data or tx_pointer or extended_chain_data_std or extended_chain_data_ext or rx_crc or r_calculated_crc or |
r_tx_data_0 or extended_chain_ext or extended_chain_std or basic_chain_data or basic_chain or |
finish_msg) |
begin |
if (extended_mode) |
begin |
if (rx_data) // data stage |
if (r_tx_data_0[0]) // Extended frame |
tx_bit = extended_chain_data_ext[tx_pointer]; |
else |
tx_bit = extended_chain_data_std[tx_pointer]; |
else if (rx_crc) |
tx_bit = r_calculated_crc[tx_pointer]; |
else if (finish_msg) |
tx_bit = 1'b1; |
else |
begin |
if (r_tx_data_0[0]) // Extended frame |
tx_bit = extended_chain_ext[tx_pointer]; |
else |
tx_bit = extended_chain_std[tx_pointer]; |
end |
end |
else // Basic mode |
begin |
if (rx_data) // data stage |
tx_bit = basic_chain_data[tx_pointer]; |
else if (rx_crc) |
tx_bit = r_calculated_crc[tx_pointer]; |
else if (finish_msg) |
tx_bit = 1'b1; |
else |
tx_bit = basic_chain[tx_pointer]; |
end |
end |
|
|
assign limited_tx_cnt_ext = tx_data_0[3] ? 6'h3f : ((tx_data_0[2:0] <<3) - 1'b1); |
assign limited_tx_cnt_std = tx_data_1[3] ? 6'h3f : ((tx_data_1[2:0] <<3) - 1'b1); |
|
assign rst_tx_pointer = ((~bit_de_stuff_tx) & tx_point & (~rx_data) & extended_mode & r_tx_data_0[0] & tx_pointer == 6'd38 ) | // arbitration + control for extended format |
((~bit_de_stuff_tx) & tx_point & (~rx_data) & extended_mode & (~r_tx_data_0[0]) & tx_pointer == 6'd18 ) | // arbitration + control for extended format |
((~bit_de_stuff_tx) & tx_point & (~rx_data) & (~extended_mode) & tx_pointer == 6'd18 ) | // arbitration + control for standard format |
((~bit_de_stuff_tx) & tx_point & rx_data & extended_mode & tx_pointer == limited_tx_cnt_ext) | // data (overflow is OK here) |
((~bit_de_stuff_tx) & tx_point & rx_data & (~extended_mode) & tx_pointer == limited_tx_cnt_std) | // data (overflow is OK here) |
( tx_point & rx_crc_lim ) | // crc |
(go_rx_idle ) | // at the end |
(reset_mode ) | |
(overload_frame ) | |
(error_frame ) ; |
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
tx_pointer <= 6'h0; |
else if (rst_tx_pointer) |
tx_pointer <=#Tp 6'h0; |
else if (go_early_tx | (tx_point & (tx_state | go_tx) & (~bit_de_stuff_tx))) |
tx_pointer <=#Tp tx_pointer + 1'b1; |
end |
|
|
assign tx_successful = transmitter & go_rx_inter & (~go_error_frame) & (~error_frame_ended) & (~overload_frame_ended) & (~arbitration_lost); |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
need_to_tx <= 1'b0; |
else if (tx_successful | reset_mode | (abort_tx & (~transmitting)) | ((~tx_state) & tx_state_q & single_shot_transmission)) |
need_to_tx <=#Tp 1'h0; |
else if (tx_request & sample_point) |
need_to_tx <=#Tp 1'b1; |
end |
|
|
|
assign go_early_tx = (~listen_only_mode) & need_to_tx & (~tx_state) & (~suspend | (susp_cnt == 3'h7)) & sample_point & (~sampled_bit) & (rx_idle | last_bit_of_inter); |
assign go_tx = (~listen_only_mode) & need_to_tx & (~tx_state) & (~suspend | (sample_point & (susp_cnt == 3'h7))) & (go_early_tx | rx_idle); |
|
// go_early_tx latched (for proper bit_de_stuff generation) |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
go_early_tx_latched <= 1'b0; |
else if (tx_point) |
go_early_tx_latched <=#Tp 1'b0; |
else if (go_early_tx) |
go_early_tx_latched <=#Tp 1'b1; |
end |
|
|
|
// Tx state |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
tx_state <= 1'b0; |
else if (reset_mode | go_rx_inter | error_frame | arbitration_lost) |
tx_state <=#Tp 1'b0; |
else if (go_tx) |
tx_state <=#Tp 1'b1; |
end |
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
tx_state_q <=#Tp 1'b0; |
else |
tx_state_q <=#Tp tx_state; |
end |
|
|
|
// Node is a transmitter |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
transmitter <= 1'b0; |
else if (go_tx) |
transmitter <=#Tp 1'b1; |
else if (reset_mode | go_rx_idle | suspend & go_rx_id1) |
transmitter <=#Tp 1'b0; |
end |
|
|
|
// Signal "transmitting" signals that the core is a transmitting (message, error frame or overload frame). No synchronization is done meanwhile. |
// Node might be both transmitter or receiver (sending error or overload frame) |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
transmitting <= 1'b0; |
else if (go_error_frame | go_overload_frame | go_tx | send_ack) |
transmitting <=#Tp 1'b1; |
else if (reset_mode | go_rx_idle | (go_rx_id1 & (~tx_state)) | (arbitration_lost & tx_state)) |
transmitting <=#Tp 1'b0; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
suspend <= 1'b0; |
else if (reset_mode | (sample_point & (susp_cnt == 3'h7))) |
suspend <=#Tp 1'b0; |
else if (not_first_bit_of_inter & transmitter & node_error_passive) |
suspend <=#Tp 1'b1; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
susp_cnt_en <= 1'b0; |
else if (reset_mode | (sample_point & (susp_cnt == 3'h7))) |
susp_cnt_en <=#Tp 1'b0; |
else if (suspend & sample_point & last_bit_of_inter) |
susp_cnt_en <=#Tp 1'b1; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
susp_cnt <= 3'h0; |
else if (reset_mode | (sample_point & (susp_cnt == 3'h7))) |
susp_cnt <=#Tp 3'h0; |
else if (susp_cnt_en & sample_point) |
susp_cnt <=#Tp susp_cnt + 1'b1; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
finish_msg <= 1'b0; |
else if (go_rx_idle | go_rx_id1 | error_frame | reset_mode) |
finish_msg <=#Tp 1'b0; |
else if (go_rx_crc_lim) |
finish_msg <=#Tp 1'b1; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
arbitration_lost <= 1'b0; |
else if (go_rx_idle | error_frame_ended | reset_mode) |
arbitration_lost <=#Tp 1'b0; |
else if (transmitter & sample_point & tx & arbitration_field & ~sampled_bit) |
arbitration_lost <=#Tp 1'b1; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
arbitration_lost_q <=#Tp 1'b0; |
else |
arbitration_lost_q <=#Tp arbitration_lost; |
end |
|
|
assign set_arbitration_lost_irq = arbitration_lost & (~arbitration_lost_q) & (~arbitration_blocked); |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
arbitration_cnt_en <= 1'b0; |
else if (arbitration_blocked) |
arbitration_cnt_en <=#Tp 1'b0; |
else if (rx_id1 & sample_point & (~arbitration_blocked)) |
arbitration_cnt_en <=#Tp 1'b1; |
end |
|
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
arbitration_blocked <= 1'b0; |
else if (read_arbitration_lost_capture_reg) |
arbitration_blocked <=#Tp 1'b0; |
else if (set_arbitration_lost_irq) |
arbitration_blocked <=#Tp 1'b1; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
arbitration_lost_capture <= 5'h0; |
else if (read_arbitration_lost_capture_reg) |
arbitration_lost_capture <=#Tp 5'h0; |
else if (sample_point & (~arbitration_blocked) & arbitration_cnt_en & (~bit_de_stuff)) |
arbitration_lost_capture <=#Tp arbitration_lost_capture + 1'b1; |
end |
|
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_err_cnt <= 9'h0; |
else if (we_rx_err_cnt & (~node_bus_off)) |
rx_err_cnt <=#Tp {1'b0, data_in}; |
else if (set_reset_mode) |
rx_err_cnt <=#Tp 9'h0; |
else |
begin |
if ((~listen_only_mode) & (~transmitter | arbitration_lost)) |
begin |
if (go_rx_ack_lim & (~go_error_frame) & (~crc_err) & (rx_err_cnt > 9'h0)) |
begin |
if (rx_err_cnt > 9'd127) |
rx_err_cnt <=#Tp 9'd127; |
else |
rx_err_cnt <=#Tp rx_err_cnt - 1'b1; |
end |
else if (rx_err_cnt < 9'd128) |
begin |
if (go_error_frame & (~rule5)) // 1 (rule 5 is just the opposite then rule 1 exception |
rx_err_cnt <=#Tp rx_err_cnt + 1'b1; |
else if ( (error_flag_over & (~error_flag_over_latched) & sample_point & (~sampled_bit) & (error_cnt1 == 3'd7) ) | // 2 |
(go_error_frame & rule5 ) | // 5 |
(sample_point & (~sampled_bit) & (delayed_dominant_cnt == 3'h7) ) // 6 |
) |
rx_err_cnt <=#Tp rx_err_cnt + 4'h8; |
end |
end |
end |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
tx_err_cnt <= 9'h0; |
else if (we_tx_err_cnt) |
tx_err_cnt <=#Tp {1'b0, data_in}; |
else |
begin |
if (set_reset_mode) |
tx_err_cnt <=#Tp 9'd128; |
else if ((tx_err_cnt > 9'd0) & (tx_successful | bus_free)) |
tx_err_cnt <=#Tp tx_err_cnt - 1'h1; |
else if (transmitter & (~arbitration_lost)) |
begin |
if ( (sample_point & (~sampled_bit) & (delayed_dominant_cnt == 3'h7) ) | // 6 |
(go_error_frame & rule5 ) | // 4 (rule 5 is the same as rule 4) |
(go_error_frame & (~(transmitter & node_error_passive & ack_err)) & (~(transmitter & stuff_err & |
arbitration_field & sample_point & tx & (~sampled_bit))) ) | // 3 |
(error_frame & rule3_exc1_2 ) // 3 |
) |
tx_err_cnt <=#Tp tx_err_cnt + 4'h8; |
end |
end |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
rx_err_cnt_blocked <= 1'b0; |
else if (reset_mode | error_frame_ended | go_error_frame | go_overload_frame) |
rx_err_cnt_blocked <=#Tp 1'b0; |
else if (sample_point & (error_cnt1 == 3'd7)) |
rx_err_cnt_blocked <=#Tp 1'b1; |
end |
|
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
node_error_passive <= 1'b0; |
else if ((rx_err_cnt < 128) & (tx_err_cnt < 9'd128)) |
node_error_passive <=#Tp 1'b0; |
else if (((rx_err_cnt >= 128) | (tx_err_cnt >= 9'd128)) & (error_frame_ended | go_error_frame | (~reset_mode) & reset_mode_q) & (~node_bus_off)) |
node_error_passive <=#Tp 1'b1; |
end |
|
|
assign node_error_active = ~(node_error_passive | node_bus_off); |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
node_bus_off <= 1'b0; |
else if ((rx_err_cnt == 9'h0) & (tx_err_cnt == 9'd0) & (~reset_mode) | (we_tx_err_cnt & (data_in < 8'd255))) |
node_bus_off <=#Tp 1'b0; |
else if ((tx_err_cnt >= 9'd256) | (we_tx_err_cnt & (data_in == 8'd255))) |
node_bus_off <=#Tp 1'b1; |
end |
|
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
bus_free_cnt <= 4'h0; |
else if (reset_mode) |
bus_free_cnt <=#Tp 4'h0; |
else if (sample_point) |
begin |
if (sampled_bit & bus_free_cnt_en & (bus_free_cnt < 4'd10)) |
bus_free_cnt <=#Tp bus_free_cnt + 1'b1; |
else |
bus_free_cnt <=#Tp 4'h0; |
end |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
bus_free_cnt_en <= 1'b0; |
else if ((~reset_mode) & reset_mode_q | node_bus_off_q & (~reset_mode)) |
bus_free_cnt_en <=#Tp 1'b1; |
else if (sample_point & sampled_bit & (bus_free_cnt==4'd10) & (~node_bus_off)) |
bus_free_cnt_en <=#Tp 1'b0; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
bus_free <= 1'b0; |
else if (sample_point & sampled_bit & (bus_free_cnt==4'd10)) |
bus_free <=#Tp 1'b1; |
else |
bus_free <=#Tp 1'b0; |
end |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
waiting_for_bus_free <= 1'b1; |
else if (bus_free & (~node_bus_off)) |
waiting_for_bus_free <=#Tp 1'b0; |
else if ((~reset_mode) & reset_mode_q | node_bus_off_q & (~reset_mode)) |
waiting_for_bus_free <=#Tp 1'b1; |
end |
|
|
assign bus_off_on = ~node_bus_off; |
|
assign set_reset_mode = node_bus_off & (~node_bus_off_q); |
assign error_status = (~reset_mode) & extended_mode? ((rx_err_cnt >= error_warning_limit) | (tx_err_cnt >= error_warning_limit)) : |
((rx_err_cnt >= 9'd96) | (tx_err_cnt >= 9'd96)) ; |
|
assign transmit_status = transmitting | (extended_mode & waiting_for_bus_free); |
assign receive_status = (~rx_idle) & (~transmitting) | (extended_mode & waiting_for_bus_free); |
|
|
/* Error code capture register */ |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
error_capture_code <= 8'h0; |
else if (read_error_code_capture_reg) |
error_capture_code <=#Tp 8'h0; |
else if (set_bus_error_irq) |
error_capture_code <=#Tp {error_capture_code_type[7:6], error_capture_code_direction, error_capture_code_segment[4:0]}; |
end |
|
|
|
assign error_capture_code_segment[0] = rx_idle | rx_ide | (rx_id2 & (bit_cnt<6'd13)) | rx_r1 | rx_r0 | rx_dlc | rx_ack | rx_ack_lim | error_frame & node_error_active; |
assign error_capture_code_segment[1] = rx_idle | rx_id1 | rx_id2 | rx_dlc | rx_data | rx_ack_lim | rx_eof | rx_inter | error_frame & node_error_passive; |
assign error_capture_code_segment[2] = (rx_id1 & (bit_cnt>6'd7)) | rx_rtr1 | rx_ide | rx_id2 | rx_rtr2 | rx_r1 | error_frame & node_error_passive | overload_frame; |
assign error_capture_code_segment[3] = (rx_id2 & (bit_cnt>6'd4)) | rx_rtr2 | rx_r1 | rx_r0 | rx_dlc | rx_data | rx_crc | rx_crc_lim | rx_ack | rx_ack_lim | rx_eof | overload_frame; |
assign error_capture_code_segment[4] = rx_crc_lim | rx_ack | rx_ack_lim | rx_eof | rx_inter | error_frame | overload_frame; |
assign error_capture_code_direction = ~transmitting; |
|
|
always @ (bit_err or form_err or stuff_err) |
begin |
if (bit_err) |
error_capture_code_type[7:6] = 2'b00; |
else if (form_err) |
error_capture_code_type[7:6] = 2'b01; |
else if (stuff_err) |
error_capture_code_type[7:6] = 2'b10; |
else |
error_capture_code_type[7:6] = 2'b11; |
end |
|
|
assign set_bus_error_irq = go_error_frame & (~error_capture_code_blocked); |
|
|
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
error_capture_code_blocked <= 1'b0; |
else if (read_error_code_capture_reg) |
error_capture_code_blocked <=#Tp 1'b0; |
else if (set_bus_error_irq) |
error_capture_code_blocked <=#Tp 1'b1; |
end |
|
|
endmodule |
|
/tags/rel_22/rtl/verilog/can_acf.v
0,0 → 1,379
////////////////////////////////////////////////////////////////////// |
//// //// |
//// can_acf.v //// |
//// //// |
//// //// |
//// This file is part of the CAN Protocol Controller //// |
//// http://www.opencores.org/projects/can/ //// |
//// //// |
//// //// |
//// Author(s): //// |
//// Igor Mohor //// |
//// igorm@opencores.org //// |
//// //// |
//// //// |
//// All additional information is available in the README.txt //// |
//// file. //// |
//// //// |
////////////////////////////////////////////////////////////////////// |
//// //// |
//// Copyright (C) 2002, 2003, 2004 Authors //// |
//// //// |
//// This source file may be used and distributed without //// |
//// restriction provided that this copyright statement is not //// |
//// removed from the file and that any derivative work contains //// |
//// the original copyright notice and the associated disclaimer. //// |
//// //// |
//// This source file is free software; you can redistribute it //// |
//// and/or modify it under the terms of the GNU Lesser General //// |
//// Public License as published by the Free Software Foundation; //// |
//// either version 2.1 of the License, or (at your option) any //// |
//// later version. //// |
//// //// |
//// This source is distributed in the hope that it will be //// |
//// useful, but WITHOUT ANY WARRANTY; without even the implied //// |
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //// |
//// PURPOSE. See the GNU Lesser General Public License for more //// |
//// details. //// |
//// //// |
//// You should have received a copy of the GNU Lesser General //// |
//// Public License along with this source; if not, download it //// |
//// from http://www.opencores.org/lgpl.shtml //// |
//// //// |
//// The CAN protocol is developed by Robert Bosch GmbH and //// |
//// protected by patents. Anybody who wants to implement this //// |
//// CAN IP core on silicon has to obtain a CAN protocol license //// |
//// from Bosch. //// |
//// //// |
////////////////////////////////////////////////////////////////////// |
// |
// CVS Revision History |
// |
// $Log: not supported by cvs2svn $ |
// Revision 1.8 2004/02/08 14:16:44 mohor |
// Header changed. |
// |
// Revision 1.7 2003/07/16 13:41:34 mohor |
// Fixed according to the linter. |
// |
// Revision 1.6 2003/02/10 16:02:11 mohor |
// CAN is working according to the specification. WB interface and more |
// registers (status, IRQ, ...) needs to be added. |
// |
// Revision 1.5 2003/02/09 18:40:29 mohor |
// Overload fixed. Hard synchronization also enabled at the last bit of |
// interframe. |
// |
// Revision 1.4 2003/02/09 02:24:33 mohor |
// Bosch license warning added. Error counters finished. Overload frames |
// still need to be fixed. |
// |
// Revision 1.3 2003/01/31 01:13:37 mohor |
// backup. |
// |
// Revision 1.2 2003/01/14 12:19:35 mohor |
// rx_fifo is now working. |
// |
// Revision 1.1 2003/01/08 02:13:15 mohor |
// Acceptance filter added. |
// |
// |
// |
// |
|
// synopsys translate_off |
`include "timescale.v" |
// synopsys translate_on |
`include "can_defines.v" |
|
module can_acf |
( |
clk, |
rst, |
|
id, |
|
/* Mode register */ |
reset_mode, |
acceptance_filter_mode, |
|
extended_mode, |
|
acceptance_code_0, |
acceptance_code_1, |
acceptance_code_2, |
acceptance_code_3, |
acceptance_mask_0, |
acceptance_mask_1, |
acceptance_mask_2, |
acceptance_mask_3, |
|
go_rx_crc_lim, |
go_rx_inter, |
go_error_frame, |
|
data0, |
data1, |
rtr1, |
rtr2, |
ide, |
no_byte0, |
no_byte1, |
|
|
id_ok |
|
|
); |
|
parameter Tp = 1; |
|
input clk; |
input rst; |
input [28:0] id; |
input reset_mode; |
input acceptance_filter_mode; |
input extended_mode; |
|
input [7:0] acceptance_code_0; |
input [7:0] acceptance_code_1; |
input [7:0] acceptance_code_2; |
input [7:0] acceptance_code_3; |
input [7:0] acceptance_mask_0; |
input [7:0] acceptance_mask_1; |
input [7:0] acceptance_mask_2; |
input [7:0] acceptance_mask_3; |
input go_rx_crc_lim; |
input go_rx_inter; |
input go_error_frame; |
input [7:0] data0; |
input [7:0] data1; |
input rtr1; |
input rtr2; |
input ide; |
input no_byte0; |
input no_byte1; |
|
|
output id_ok; |
|
reg id_ok; |
|
wire match; |
wire match_sf_std; |
wire match_sf_ext; |
wire match_df_std; |
wire match_df_ext; |
|
|
// Working in basic mode. ID match for standard format (11-bit ID). |
assign match = ( (id[3] == acceptance_code_0[0] | acceptance_mask_0[0] ) & |
(id[4] == acceptance_code_0[1] | acceptance_mask_0[1] ) & |
(id[5] == acceptance_code_0[2] | acceptance_mask_0[2] ) & |
(id[6] == acceptance_code_0[3] | acceptance_mask_0[3] ) & |
(id[7] == acceptance_code_0[4] | acceptance_mask_0[4] ) & |
(id[8] == acceptance_code_0[5] | acceptance_mask_0[5] ) & |
(id[9] == acceptance_code_0[6] | acceptance_mask_0[6] ) & |
(id[10] == acceptance_code_0[7] | acceptance_mask_0[7] ) |
); |
|
|
// Working in extended mode. ID match for standard format (11-bit ID). Using single filter. |
assign match_sf_std = ( (id[3] == acceptance_code_0[0] | acceptance_mask_0[0] ) & |
(id[4] == acceptance_code_0[1] | acceptance_mask_0[1] ) & |
(id[5] == acceptance_code_0[2] | acceptance_mask_0[2] ) & |
(id[6] == acceptance_code_0[3] | acceptance_mask_0[3] ) & |
(id[7] == acceptance_code_0[4] | acceptance_mask_0[4] ) & |
(id[8] == acceptance_code_0[5] | acceptance_mask_0[5] ) & |
(id[9] == acceptance_code_0[6] | acceptance_mask_0[6] ) & |
(id[10] == acceptance_code_0[7] | acceptance_mask_0[7] ) & |
|
(rtr1 == acceptance_code_1[4] | acceptance_mask_1[4] ) & |
(id[0] == acceptance_code_1[5] | acceptance_mask_1[5] ) & |
(id[1] == acceptance_code_1[6] | acceptance_mask_1[6] ) & |
(id[2] == acceptance_code_1[7] | acceptance_mask_1[7] ) & |
|
(data0[0] == acceptance_code_2[0] | acceptance_mask_2[0] | no_byte0) & |
(data0[1] == acceptance_code_2[1] | acceptance_mask_2[1] | no_byte0) & |
(data0[2] == acceptance_code_2[2] | acceptance_mask_2[2] | no_byte0) & |
(data0[3] == acceptance_code_2[3] | acceptance_mask_2[3] | no_byte0) & |
(data0[4] == acceptance_code_2[4] | acceptance_mask_2[4] | no_byte0) & |
(data0[5] == acceptance_code_2[5] | acceptance_mask_2[5] | no_byte0) & |
(data0[6] == acceptance_code_2[6] | acceptance_mask_2[6] | no_byte0) & |
(data0[7] == acceptance_code_2[7] | acceptance_mask_2[7] | no_byte0) & |
|
(data1[0] == acceptance_code_3[0] | acceptance_mask_3[0] | no_byte1) & |
(data1[1] == acceptance_code_3[1] | acceptance_mask_3[1] | no_byte1) & |
(data1[2] == acceptance_code_3[2] | acceptance_mask_3[2] | no_byte1) & |
(data1[3] == acceptance_code_3[3] | acceptance_mask_3[3] | no_byte1) & |
(data1[4] == acceptance_code_3[4] | acceptance_mask_3[4] | no_byte1) & |
(data1[5] == acceptance_code_3[5] | acceptance_mask_3[5] | no_byte1) & |
(data1[6] == acceptance_code_3[6] | acceptance_mask_3[6] | no_byte1) & |
(data1[7] == acceptance_code_3[7] | acceptance_mask_3[7] | no_byte1) |
); |
|
|
|
// Working in extended mode. ID match for extended format (29-bit ID). Using single filter. |
assign match_sf_ext = ( (id[21] == acceptance_code_0[0] | acceptance_mask_0[0] ) & |
(id[22] == acceptance_code_0[1] | acceptance_mask_0[1] ) & |
(id[23] == acceptance_code_0[2] | acceptance_mask_0[2] ) & |
(id[24] == acceptance_code_0[3] | acceptance_mask_0[3] ) & |
(id[25] == acceptance_code_0[4] | acceptance_mask_0[4] ) & |
(id[26] == acceptance_code_0[5] | acceptance_mask_0[5] ) & |
(id[27] == acceptance_code_0[6] | acceptance_mask_0[6] ) & |
(id[28] == acceptance_code_0[7] | acceptance_mask_0[7] ) & |
|
(id[13] == acceptance_code_1[0] | acceptance_mask_1[0] ) & |
(id[14] == acceptance_code_1[1] | acceptance_mask_1[1] ) & |
(id[15] == acceptance_code_1[2] | acceptance_mask_1[2] ) & |
(id[16] == acceptance_code_1[3] | acceptance_mask_1[3] ) & |
(id[17] == acceptance_code_1[4] | acceptance_mask_1[4] ) & |
(id[18] == acceptance_code_1[5] | acceptance_mask_1[5] ) & |
(id[19] == acceptance_code_1[6] | acceptance_mask_1[6] ) & |
(id[20] == acceptance_code_1[7] | acceptance_mask_1[7] ) & |
|
(id[5] == acceptance_code_2[0] | acceptance_mask_2[0] ) & |
(id[6] == acceptance_code_2[1] | acceptance_mask_2[1] ) & |
(id[7] == acceptance_code_2[2] | acceptance_mask_2[2] ) & |
(id[8] == acceptance_code_2[3] | acceptance_mask_2[3] ) & |
(id[9] == acceptance_code_2[4] | acceptance_mask_2[4] ) & |
(id[10] == acceptance_code_2[5] | acceptance_mask_2[5] ) & |
(id[11] == acceptance_code_2[6] | acceptance_mask_2[6] ) & |
(id[12] == acceptance_code_2[7] | acceptance_mask_2[7] ) & |
|
(rtr2 == acceptance_code_3[2] | acceptance_mask_3[2] ) & |
(id[0] == acceptance_code_3[3] | acceptance_mask_3[3] ) & |
(id[1] == acceptance_code_3[4] | acceptance_mask_3[4] ) & |
(id[2] == acceptance_code_3[5] | acceptance_mask_3[5] ) & |
(id[3] == acceptance_code_3[6] | acceptance_mask_3[6] ) & |
(id[4] == acceptance_code_3[7] | acceptance_mask_3[7] ) |
|
); |
|
|
// Working in extended mode. ID match for standard format (11-bit ID). Using double filter. |
assign match_df_std = (((id[3] == acceptance_code_0[0] | acceptance_mask_0[0] ) & |
(id[4] == acceptance_code_0[1] | acceptance_mask_0[1] ) & |
(id[5] == acceptance_code_0[2] | acceptance_mask_0[2] ) & |
(id[6] == acceptance_code_0[3] | acceptance_mask_0[3] ) & |
(id[7] == acceptance_code_0[4] | acceptance_mask_0[4] ) & |
(id[8] == acceptance_code_0[5] | acceptance_mask_0[5] ) & |
(id[9] == acceptance_code_0[6] | acceptance_mask_0[6] ) & |
(id[10] == acceptance_code_0[7] | acceptance_mask_0[7] ) & |
|
(rtr1 == acceptance_code_1[4] | acceptance_mask_1[4] ) & |
(id[0] == acceptance_code_1[5] | acceptance_mask_1[5] ) & |
(id[1] == acceptance_code_1[6] | acceptance_mask_1[6] ) & |
(id[2] == acceptance_code_1[7] | acceptance_mask_1[7] ) & |
|
(data0[0] == acceptance_code_3[0] | acceptance_mask_3[0] | no_byte0) & |
(data0[1] == acceptance_code_3[1] | acceptance_mask_3[1] | no_byte0) & |
(data0[2] == acceptance_code_3[2] | acceptance_mask_3[2] | no_byte0) & |
(data0[3] == acceptance_code_3[3] | acceptance_mask_3[3] | no_byte0) & |
(data0[4] == acceptance_code_1[4] | acceptance_mask_1[4] | no_byte0) & |
(data0[5] == acceptance_code_1[5] | acceptance_mask_1[5] | no_byte0) & |
(data0[6] == acceptance_code_1[6] | acceptance_mask_1[6] | no_byte0) & |
(data0[7] == acceptance_code_1[7] | acceptance_mask_1[7] | no_byte0) ) |
|
| |
|
((id[3] == acceptance_code_2[0] | acceptance_mask_2[0] ) & |
(id[4] == acceptance_code_2[1] | acceptance_mask_2[1] ) & |
(id[5] == acceptance_code_2[2] | acceptance_mask_2[2] ) & |
(id[6] == acceptance_code_2[3] | acceptance_mask_2[3] ) & |
(id[7] == acceptance_code_2[4] | acceptance_mask_2[4] ) & |
(id[8] == acceptance_code_2[5] | acceptance_mask_2[5] ) & |
(id[9] == acceptance_code_2[6] | acceptance_mask_2[6] ) & |
(id[10] == acceptance_code_2[7] | acceptance_mask_2[7] ) & |
|
(rtr1 == acceptance_code_3[4] | acceptance_mask_3[4] ) & |
(id[0] == acceptance_code_3[5] | acceptance_mask_3[5] ) & |
(id[1] == acceptance_code_3[6] | acceptance_mask_3[6] ) & |
(id[2] == acceptance_code_3[7] | acceptance_mask_3[7] ) ) |
|
); |
|
|
// Working in extended mode. ID match for extended format (29-bit ID). Using double filter. |
assign match_df_ext = (((id[21] == acceptance_code_0[0] | acceptance_mask_0[0] ) & |
(id[22] == acceptance_code_0[1] | acceptance_mask_0[1] ) & |
(id[23] == acceptance_code_0[2] | acceptance_mask_0[2] ) & |
(id[24] == acceptance_code_0[3] | acceptance_mask_0[3] ) & |
(id[25] == acceptance_code_0[4] | acceptance_mask_0[4] ) & |
(id[26] == acceptance_code_0[5] | acceptance_mask_0[5] ) & |
(id[27] == acceptance_code_0[6] | acceptance_mask_0[6] ) & |
(id[28] == acceptance_code_0[7] | acceptance_mask_0[7] ) & |
|
(id[13] == acceptance_code_1[0] | acceptance_mask_1[0] ) & |
(id[14] == acceptance_code_1[1] | acceptance_mask_1[1] ) & |
(id[15] == acceptance_code_1[2] | acceptance_mask_1[2] ) & |
(id[16] == acceptance_code_1[3] | acceptance_mask_1[3] ) & |
(id[17] == acceptance_code_1[4] | acceptance_mask_1[4] ) & |
(id[18] == acceptance_code_1[5] | acceptance_mask_1[5] ) & |
(id[19] == acceptance_code_1[6] | acceptance_mask_1[6] ) & |
(id[20] == acceptance_code_1[7] | acceptance_mask_1[7] ) ) |
|
| |
|
((id[21] == acceptance_code_2[0] | acceptance_mask_2[0] ) & |
(id[22] == acceptance_code_2[1] | acceptance_mask_2[1] ) & |
(id[23] == acceptance_code_2[2] | acceptance_mask_2[2] ) & |
(id[24] == acceptance_code_2[3] | acceptance_mask_2[3] ) & |
(id[25] == acceptance_code_2[4] | acceptance_mask_2[4] ) & |
(id[26] == acceptance_code_2[5] | acceptance_mask_2[5] ) & |
(id[27] == acceptance_code_2[6] | acceptance_mask_2[6] ) & |
(id[28] == acceptance_code_2[7] | acceptance_mask_2[7] ) & |
|
(id[13] == acceptance_code_3[0] | acceptance_mask_3[0] ) & |
(id[14] == acceptance_code_3[1] | acceptance_mask_3[1] ) & |
(id[15] == acceptance_code_3[2] | acceptance_mask_3[2] ) & |
(id[16] == acceptance_code_3[3] | acceptance_mask_3[3] ) & |
(id[17] == acceptance_code_3[4] | acceptance_mask_3[4] ) & |
(id[18] == acceptance_code_3[5] | acceptance_mask_3[5] ) & |
(id[19] == acceptance_code_3[6] | acceptance_mask_3[6] ) & |
(id[20] == acceptance_code_3[7] | acceptance_mask_3[7] ) ) |
); |
|
|
|
// ID ok signal generation |
always @ (posedge clk or posedge rst) |
begin |
if (rst) |
id_ok <= 1'b0; |
else if (go_rx_crc_lim) // sample_point is already included in go_rx_crc_lim |
begin |
if (extended_mode) |
begin |
if (~acceptance_filter_mode) // dual filter |
begin |
if (ide) // extended frame message |
id_ok <=#Tp match_df_ext; |
else // standard frame message |
id_ok <=#Tp match_df_std; |
end |
else // single filter |
begin |
if (ide) // extended frame message |
id_ok <=#Tp match_sf_ext; |
else // standard frame message |
id_ok <=#Tp match_sf_std; |
end |
end |
else |
id_ok <=#Tp match; |
end |
else if (reset_mode | go_rx_inter | go_error_frame) // sample_point is already included in go_rx_inter |
id_ok <=#Tp 1'b0; |
end |
|
|
|
|
|
|
|
|
|
endmodule |
/tags/rel_22/rtl/verilog/can_defines.v
0,0 → 1,119
////////////////////////////////////////////////////////////////////// |
//// //// |
//// can_defines.v //// |
//// //// |
//// //// |
//// This file is part of the CAN Protocol Controller //// |
//// http://www.opencores.org/projects/can/ //// |
//// //// |
//// //// |
//// Author(s): //// |
//// Igor Mohor //// |
//// igorm@opencores.org //// |
//// //// |
//// //// |
//// All additional information is available in the README.txt //// |
//// file. //// |
//// //// |
////////////////////////////////////////////////////////////////////// |
//// //// |
//// Copyright (C) 2002, 2003, 2004 Authors //// |
//// //// |
//// This source file may be used and distributed without //// |
//// restriction provided that this copyright statement is not //// |
//// removed from the file and that any derivative work contains //// |
//// the original copyright notice and the associated disclaimer. //// |
//// //// |
//// This source file is free software; you can redistribute it //// |
//// and/or modify it under the terms of the GNU Lesser General //// |
//// Public License as published by the Free Software Foundation; //// |
//// either version 2.1 of the License, or (at your option) any //// |
//// later version. //// |
//// //// |
//// This source is distributed in the hope that it will be //// |
//// useful, but WITHOUT ANY WARRANTY; without even the implied //// |
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //// |
//// PURPOSE. See the GNU Lesser General Public License for more //// |
//// details. //// |
//// //// |
//// You should have received a copy of the GNU Lesser General //// |
//// Public License along with this source; if not, download it //// |
//// from http://www.opencores.org/lgpl.shtml //// |
//// //// |
//// The CAN protocol is developed by Robert Bosch GmbH and //// |
//// protected by patents. Anybody who wants to implement this //// |
//// CAN IP core on silicon has to obtain a CAN protocol license //// |
//// from Bosch. //// |
//// //// |
////////////////////////////////////////////////////////////////////// |
// |
// CVS Revision History |
// |
// $Log: not supported by cvs2svn $ |
// Revision 1.13 2004/02/08 14:28:03 mohor |
// Header changed. |
// |
// Revision 1.12 2003/10/17 05:55:20 markom |
// mbist signals updated according to newest convention |
// |
// Revision 1.11 2003/09/05 12:46:42 mohor |
// ALTERA_RAM supported. |
// |
// Revision 1.10 2003/08/14 16:04:52 simons |
// Artisan ram instances added. |
// |
// Revision 1.9 2003/06/27 20:56:15 simons |
// Virtual silicon ram instances added. |
// |
// Revision 1.8 2003/06/09 11:32:36 mohor |
// Ports added for the CAN_BIST. |
// |
// Revision 1.7 2003/03/20 16:51:55 mohor |
// *** empty log message *** |
// |
// Revision 1.6 2003/03/12 04:19:13 mohor |
// 8051 interface added (besides WISHBONE interface). Selection is made in |
// can_defines.v file. |
// |
// Revision 1.5 2003/03/05 15:03:20 mohor |
// Xilinx RAM added. |
// |
// Revision 1.4 2003/03/01 22:52:47 mohor |
// Actel APA ram supported. |
// |
// Revision 1.3 2003/02/09 02:24:33 mohor |
// Bosch license warning added. Error counters finished. Overload frames |
// still need to be fixed. |
// |
// Revision 1.2 2002/12/27 00:12:52 mohor |
// Header changed, testbench improved to send a frame (crc still missing). |
// |
// Revision 1.1.1.1 2002/12/20 16:39:21 mohor |
// Initial |
// |
// |
// |
|
|
// Uncomment following line if you want to use WISHBONE interface. Otherwise |
// 8051 interface is used. |
// `define CAN_WISHBONE_IF |
|
// Uncomment following line if you want to use CAN in Actel APA devices (embedded memory used) |
// `define ACTEL_APA_RAM |
|
// Uncomment following line if you want to use CAN in Altera devices (embedded memory used) |
// `define ALTERA_RAM |
|
// Uncomment following line if you want to use CAN in Xilinx devices (embedded memory used) |
// `define XILINX_RAM |
|
// Uncomment the line for the ram used in ASIC implementation |
// `define VIRTUALSILICON_RAM |
// `define ARTISAN_RAM |
|
// Uncomment the following line when RAM BIST is needed (ASIC implementation) |
//`define CAN_BIST // Bist (for ASIC implementation) |
|
/* width of MBIST control bus */ |
//`define CAN_MBIST_CTRL_WIDTH 3 |
tags/rel_22/rtl/verilog/can_defines.v
Property changes :
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property
Index: tags/rel_22/rtl/verilog/can_btl.v
===================================================================
--- tags/rel_22/rtl/verilog/can_btl.v (nonexistent)
+++ tags/rel_22/rtl/verilog/can_btl.v (revision 146)
@@ -0,0 +1,478 @@
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// can_btl.v ////
+//// ////
+//// ////
+//// This file is part of the CAN Protocol Controller ////
+//// http://www.opencores.org/projects/can/ ////
+//// ////
+//// ////
+//// Author(s): ////
+//// Igor Mohor ////
+//// igorm@opencores.org ////
+//// ////
+//// ////
+//// All additional information is available in the README.txt ////
+//// file. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// Copyright (C) 2002, 2003, 2004 Authors ////
+//// ////
+//// This source file may be used and distributed without ////
+//// restriction provided that this copyright statement is not ////
+//// removed from the file and that any derivative work contains ////
+//// the original copyright notice and the associated disclaimer. ////
+//// ////
+//// This source file is free software; you can redistribute it ////
+//// and/or modify it under the terms of the GNU Lesser General ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any ////
+//// later version. ////
+//// ////
+//// This source is distributed in the hope that it will be ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
+//// PURPOSE. See the GNU Lesser General Public License for more ////
+//// details. ////
+//// ////
+//// You should have received a copy of the GNU Lesser General ////
+//// Public License along with this source; if not, download it ////
+//// from http://www.opencores.org/lgpl.shtml ////
+//// ////
+//// The CAN protocol is developed by Robert Bosch GmbH and ////
+//// protected by patents. Anybody who wants to implement this ////
+//// CAN IP core on silicon has to obtain a CAN protocol license ////
+//// from Bosch. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//
+// CVS Revision History
+//
+// $Log: not supported by cvs2svn $
+// Revision 1.28 2004/02/08 14:25:26 mohor
+// Header changed.
+//
+// Revision 1.27 2003/09/30 00:55:13 mohor
+// Error counters fixed to be compatible with Bosch VHDL reference model.
+// Small synchronization changes.
+//
+// Revision 1.26 2003/09/25 18:55:49 mohor
+// Synchronization changed, error counters fixed.
+//
+// Revision 1.25 2003/07/16 13:40:35 mohor
+// Fixed according to the linter.
+//
+// Revision 1.24 2003/07/10 15:32:28 mohor
+// Unused signal removed.
+//
+// Revision 1.23 2003/07/10 01:59:04 tadejm
+// Synchronization fixed. In some strange cases it didn't work according to
+// the VHDL reference model.
+//
+// Revision 1.22 2003/07/07 11:21:37 mohor
+// Little fixes (to fix warnings).
+//
+// Revision 1.21 2003/07/03 09:32:20 mohor
+// Synchronization changed.
+//
+// Revision 1.20 2003/06/20 14:51:11 mohor
+// Previous change removed. When resynchronization occurs we go to seg1
+// stage. sync stage does not cause another start of seg1 stage.
+//
+// Revision 1.19 2003/06/20 14:28:20 mohor
+// When hard_sync or resync occure we need to go to seg1 segment. Going to
+// sync segment is in that case blocked.
+//
+// Revision 1.18 2003/06/17 15:53:33 mohor
+// clk_cnt reduced from [8:0] to [6:0].
+//
+// Revision 1.17 2003/06/17 14:32:17 mohor
+// Removed few signals.
+//
+// Revision 1.16 2003/06/16 13:57:58 mohor
+// tx_point generated one clk earlier. rx_i registered. Data corrected when
+// using extended mode.
+//
+// Revision 1.15 2003/06/13 15:02:24 mohor
+// Synchronization is also needed when transmitting a message.
+//
+// Revision 1.14 2003/06/13 14:55:11 mohor
+// Counters width changed.
+//
+// Revision 1.13 2003/06/11 14:21:35 mohor
+// When switching to tx, sync stage is overjumped.
+//
+// Revision 1.12 2003/02/14 20:17:01 mohor
+// Several registers added. Not finished, yet.
+//
+// Revision 1.11 2003/02/09 18:40:29 mohor
+// Overload fixed. Hard synchronization also enabled at the last bit of
+// interframe.
+//
+// Revision 1.10 2003/02/09 02:24:33 mohor
+// Bosch license warning added. Error counters finished. Overload frames
+// still need to be fixed.
+//
+// Revision 1.9 2003/01/31 01:13:38 mohor
+// backup.
+//
+// Revision 1.8 2003/01/10 17:51:34 mohor
+// Temporary version (backup).
+//
+// Revision 1.7 2003/01/08 02:10:53 mohor
+// Acceptance filter added.
+//
+// Revision 1.6 2002/12/28 04:13:23 mohor
+// Backup version.
+//
+// Revision 1.5 2002/12/27 00:12:52 mohor
+// Header changed, testbench improved to send a frame (crc still missing).
+//
+// Revision 1.4 2002/12/26 01:33:05 mohor
+// Tripple sampling supported.
+//
+// Revision 1.3 2002/12/25 23:44:16 mohor
+// Commented lines removed.
+//
+// Revision 1.2 2002/12/25 14:17:00 mohor
+// Synchronization working.
+//
+// Revision 1.1.1.1 2002/12/20 16:39:21 mohor
+// Initial
+//
+//
+//
+
+// synopsys translate_off
+`include "timescale.v"
+// synopsys translate_on
+`include "can_defines.v"
+
+module can_btl
+(
+ clk,
+ rst,
+ rx,
+ tx,
+
+ /* Bus Timing 0 register */
+ baud_r_presc,
+ sync_jump_width,
+
+ /* Bus Timing 1 register */
+ time_segment1,
+ time_segment2,
+ triple_sampling,
+
+ /* Output signals from this module */
+ sample_point,
+ sampled_bit,
+ sampled_bit_q,
+ tx_point,
+ hard_sync,
+
+ /* Output from can_bsp module */
+ rx_idle,
+ rx_inter,
+ transmitting,
+ transmitter,
+ go_rx_inter,
+ tx_next,
+
+ go_overload_frame,
+ go_error_frame,
+ go_tx,
+ send_ack,
+ node_error_passive
+);
+
+parameter Tp = 1;
+
+input clk;
+input rst;
+input rx;
+input tx;
+
+
+/* Bus Timing 0 register */
+input [5:0] baud_r_presc;
+input [1:0] sync_jump_width;
+
+/* Bus Timing 1 register */
+input [3:0] time_segment1;
+input [2:0] time_segment2;
+input triple_sampling;
+
+/* Output from can_bsp module */
+input rx_idle;
+input rx_inter;
+input transmitting;
+input transmitter;
+input go_rx_inter;
+input tx_next;
+
+input go_overload_frame;
+input go_error_frame;
+input go_tx;
+input send_ack;
+input node_error_passive;
+
+/* Output signals from this module */
+output sample_point;
+output sampled_bit;
+output sampled_bit_q;
+output tx_point;
+output hard_sync;
+
+reg [6:0] clk_cnt;
+reg clk_en;
+reg clk_en_q;
+reg sync_blocked;
+reg hard_sync_blocked;
+reg sampled_bit;
+reg sampled_bit_q;
+reg [3:0] quant_cnt;
+reg [3:0] delay;
+reg sync;
+reg seg1;
+reg seg2;
+reg resync_latched;
+reg sample_point;
+reg [1:0] sample;
+reg tx_point;
+reg tx_next_sp;
+
+wire go_sync;
+wire go_seg1;
+wire go_seg2;
+wire [7:0] preset_cnt;
+wire sync_window;
+wire resync;
+
+
+assign preset_cnt = (baud_r_presc + 1'b1)<<1; // (BRP+1)*2
+assign hard_sync = (rx_idle | rx_inter) & (~rx) & sampled_bit & (~hard_sync_blocked); // Hard synchronization
+assign resync = (~rx_idle) & (~rx_inter) & (~rx) & sampled_bit & (~sync_blocked); // Re-synchronization
+
+
+
+/* Generating general enable signal that defines baud rate. */
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ clk_cnt <= 7'h0;
+ else if (clk_cnt >= (preset_cnt-1'b1))
+ clk_cnt <=#Tp 7'h0;
+ else
+ clk_cnt <=#Tp clk_cnt + 1'b1;
+end
+
+
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ clk_en <= 1'b0;
+ else if ({1'b0, clk_cnt} == (preset_cnt-1'b1))
+ clk_en <=#Tp 1'b1;
+ else
+ clk_en <=#Tp 1'b0;
+end
+
+
+
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ clk_en_q <= 1'b0;
+ else
+ clk_en_q <=#Tp clk_en;
+end
+
+
+
+/* Changing states */
+assign go_sync = clk_en_q & seg2 & (quant_cnt[2:0] == time_segment2) & (~hard_sync) & (~resync);
+assign go_seg1 = clk_en_q & (sync | hard_sync | (resync & seg2 & sync_window) | (resync_latched & sync_window));
+assign go_seg2 = clk_en_q & (seg1 & (~hard_sync) & (quant_cnt == (time_segment1 + delay)));
+
+
+
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ tx_point <= 1'b0;
+ else
+ tx_point <=#Tp ~tx_point & seg2 & ( clk_en & (quant_cnt[2:0] == time_segment2)
+ | (clk_en | clk_en_q) & (resync | hard_sync)
+ ); // When transmitter we should transmit as soon as possible.
+end
+
+
+
+/* When early edge is detected outside of the SJW field, synchronization request is latched and performed when
+ SJW is reached */
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ resync_latched <= 1'b0;
+ else if (resync & seg2 & (~sync_window))
+ resync_latched <=#Tp 1'b1;
+ else if (go_seg1)
+ resync_latched <= 1'b0;
+end
+
+
+
+/* Synchronization stage/segment */
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ sync <= 1'b0;
+ else if (clk_en_q)
+ sync <=#Tp go_sync;
+end
+
+
+/* Seg1 stage/segment (together with propagation segment which is 1 quant long) */
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ seg1 <= 1'b1;
+ else if (go_seg1)
+ seg1 <=#Tp 1'b1;
+ else if (go_seg2)
+ seg1 <=#Tp 1'b0;
+end
+
+
+/* Seg2 stage/segment */
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ seg2 <= 1'b0;
+ else if (go_seg2)
+ seg2 <=#Tp 1'b1;
+ else if (go_sync | go_seg1)
+ seg2 <=#Tp 1'b0;
+end
+
+
+/* Quant counter */
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ quant_cnt <= 4'h0;
+ else if (go_sync | go_seg1 | go_seg2)
+ quant_cnt <=#Tp 4'h0;
+ else if (clk_en_q)
+ quant_cnt <=#Tp quant_cnt + 1'b1;
+end
+
+
+/* When late edge is detected (in seg1 stage), stage seg1 is prolonged. */
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ delay <= 4'h0;
+ else if (resync & seg1 & (~transmitting | transmitting & (tx_next_sp | (tx & (~rx))))) // when transmitting 0 with positive error delay is set to 0
+ delay <=#Tp (quant_cnt > {2'h0, sync_jump_width})? ({2'h0, sync_jump_width} + 1'b1) : (quant_cnt + 1'b1);
+ else if (go_sync | go_seg1)
+ delay <=#Tp 4'h0;
+end
+
+
+// If early edge appears within this window (in seg2 stage), phase error is fully compensated
+assign sync_window = ((time_segment2 - quant_cnt[2:0]) < ( sync_jump_width + 1'b1));
+
+
+// Sampling data (memorizing two samples all the time).
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ sample <= 2'b11;
+ else if (clk_en_q)
+ sample <= {sample[0], rx};
+end
+
+
+// When enabled, tripple sampling is done here.
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ begin
+ sampled_bit <= 1'b1;
+ sampled_bit_q <= 1'b1;
+ sample_point <= 1'b0;
+ end
+ else if (go_error_frame)
+ begin
+ sampled_bit_q <=#Tp sampled_bit;
+ sample_point <=#Tp 1'b0;
+ end
+ else if (clk_en_q & (~hard_sync))
+ begin
+ if (seg1 & (quant_cnt == (time_segment1 + delay)))
+ begin
+ sample_point <=#Tp 1'b1;
+ sampled_bit_q <=#Tp sampled_bit;
+ if (triple_sampling)
+ sampled_bit <=#Tp (sample[0] & sample[1]) | ( sample[0] & rx) | (sample[1] & rx);
+ else
+ sampled_bit <=#Tp rx;
+ end
+ end
+ else
+ sample_point <=#Tp 1'b0;
+end
+
+
+// tx_next_sp shows next value that will be driven on the TX. When driving 1 and receiving 0 we
+// need to synchronize (even when we are a transmitter)
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ tx_next_sp <= 1'b0;
+ else if (go_overload_frame | (go_error_frame & (~node_error_passive)) | go_tx | send_ack)
+ tx_next_sp <=#Tp 1'b0;
+ else if (go_error_frame & node_error_passive)
+ tx_next_sp <=#Tp 1'b1;
+ else if (sample_point)
+ tx_next_sp <=#Tp tx_next;
+end
+
+
+
+/* Blocking synchronization (can occur only once in a bit time) */
+
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ sync_blocked <=#Tp 1'b1;
+ else if (clk_en_q)
+ begin
+ if (resync)
+ sync_blocked <=#Tp 1'b1;
+ else if (go_seg2)
+ sync_blocked <=#Tp 1'b0;
+ end
+end
+
+
+/* Blocking hard synchronization when occurs once or when we are transmitting a msg */
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ hard_sync_blocked <=#Tp 1'b0;
+ else if (hard_sync & clk_en_q | (transmitting & transmitter | go_tx) & tx_point & (~tx_next))
+ hard_sync_blocked <=#Tp 1'b1;
+ else if (go_rx_inter | (rx_idle | rx_inter) & sample_point & sampled_bit) // When a glitch performed synchronization
+ hard_sync_blocked <=#Tp 1'b0;
+end
+
+
+
+
+
+endmodule
+
Index: tags/rel_22/rtl/verilog/README.txt
===================================================================
--- tags/rel_22/rtl/verilog/README.txt (nonexistent)
+++ tags/rel_22/rtl/verilog/README.txt (revision 146)
@@ -0,0 +1,69 @@
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// README.txt ////
+//// ////
+//// ////
+//// This file is part of the CAN Protocol Controller ////
+//// http://www.opencores.org/projects/can/ ////
+//// ////
+//// ////
+//// Author(s): ////
+//// Igor Mohor ////
+//// igorm@opencores.org ////
+//// ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// Copyright (C) 2002, 2003, 2004 Authors ////
+//// ////
+//// This source file may be used and distributed without ////
+//// restriction provided that this copyright statement is not ////
+//// removed from the file and that any derivative work contains ////
+//// the original copyright notice and the associated disclaimer. ////
+//// ////
+//// This source file is free software; you can redistribute it ////
+//// and/or modify it under the terms of the GNU Lesser General ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any ////
+//// later version. ////
+//// ////
+//// This source is distributed in the hope that it will be ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
+//// PURPOSE. See the GNU Lesser General Public License for more ////
+//// details. ////
+//// ////
+//// You should have received a copy of the GNU Lesser General ////
+//// Public License along with this source; if not, download it ////
+//// from http://www.opencores.org/lgpl.shtml ////
+//// ////
+//// The CAN protocol is developed by Robert Bosch GmbH and ////
+//// protected by patents. Anybody who wants to implement this ////
+//// CAN IP core on silicon has to obtain a CAN protocol license ////
+//// from Bosch. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//
+// CVS Revision History
+//
+// $Log: not supported by cvs2svn $
+//
+//
+//
+
+
+This CAN Controller was tested with the Bosch VHDL Reference Model and
+passed all the tests. Because of the licensing issue it can not be
+published on the Opencores web site.
+
+The Can Controller was also implemented in real HW (12 boards
+were constantly talking to each other).
+
+The included test bench is not a real test bench and should be improved.
+However a volunteer is needed for such a job. I can provide some help
+but am not willing to write it by myself.
+
+Best regards,
+ Igor Mohor
+
+
Index: tags/rel_22/rtl/verilog/can_registers.v
===================================================================
--- tags/rel_22/rtl/verilog/can_registers.v (nonexistent)
+++ tags/rel_22/rtl/verilog/can_registers.v (revision 146)
@@ -0,0 +1,1230 @@
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// can_registers.v ////
+//// ////
+//// ////
+//// This file is part of the CAN Protocol Controller ////
+//// http://www.opencores.org/projects/can/ ////
+//// ////
+//// ////
+//// Author(s): ////
+//// Igor Mohor ////
+//// igorm@opencores.org ////
+//// ////
+//// ////
+//// All additional information is available in the README.txt ////
+//// file. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// Copyright (C) 2002, 2003 Authors ////
+//// ////
+//// This source file may be used and distributed without ////
+//// restriction provided that this copyright statement is not ////
+//// removed from the file and that any derivative work contains ////
+//// the original copyright notice and the associated disclaimer. ////
+//// ////
+//// This source file is free software; you can redistribute it ////
+//// and/or modify it under the terms of the GNU Lesser General ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any ////
+//// later version. ////
+//// ////
+//// This source is distributed in the hope that it will be ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
+//// PURPOSE. See the GNU Lesser General Public License for more ////
+//// details. ////
+//// ////
+//// You should have received a copy of the GNU Lesser General ////
+//// Public License along with this source; if not, download it ////
+//// from http://www.opencores.org/lgpl.shtml ////
+//// ////
+//// The CAN protocol is developed by Robert Bosch GmbH and ////
+//// protected by patents. Anybody who wants to implement this ////
+//// CAN IP core on silicon has to obtain a CAN protocol license ////
+//// from Bosch. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//
+// CVS Revision History
+//
+// $Log: not supported by cvs2svn $
+// Revision 1.31 2003/09/25 18:55:49 mohor
+// Synchronization changed, error counters fixed.
+//
+// Revision 1.30 2003/07/16 15:19:34 mohor
+// Fixed according to the linter.
+// Case statement for data_out joined.
+//
+// Revision 1.29 2003/07/10 01:59:04 tadejm
+// Synchronization fixed. In some strange cases it didn't work according to
+// the VHDL reference model.
+//
+// Revision 1.28 2003/07/07 11:21:37 mohor
+// Little fixes (to fix warnings).
+//
+// Revision 1.27 2003/06/22 09:43:03 mohor
+// synthesi full_case parallel_case fixed.
+//
+// Revision 1.26 2003/06/22 01:33:14 mohor
+// clkout is clk/2 after the reset.
+//
+// Revision 1.25 2003/06/21 12:16:30 mohor
+// paralel_case and full_case compiler directives added to case statements.
+//
+// Revision 1.24 2003/06/09 11:22:54 mohor
+// data_out is already registered in the can_top.v file.
+//
+// Revision 1.23 2003/04/15 15:31:24 mohor
+// Some features are supported in extended mode only (listen_only_mode...).
+//
+// Revision 1.22 2003/03/20 16:58:50 mohor
+// unix.
+//
+// Revision 1.20 2003/03/11 16:31:05 mohor
+// Mux used for clkout to avoid "gated clocks warning".
+//
+// Revision 1.19 2003/03/10 17:34:25 mohor
+// Doubled declarations removed.
+//
+// Revision 1.18 2003/03/01 22:52:11 mohor
+// Data is latched on read.
+//
+// Revision 1.17 2003/02/19 15:09:02 mohor
+// Incomplete sensitivity list fixed.
+//
+// Revision 1.16 2003/02/19 14:44:03 mohor
+// CAN core finished. Host interface added. Registers finished.
+// Synchronization to the wishbone finished.
+//
+// Revision 1.15 2003/02/18 00:10:15 mohor
+// Most of the registers added. Registers "arbitration lost capture", "error code
+// capture" + few more still need to be added.
+//
+// Revision 1.14 2003/02/14 20:17:01 mohor
+// Several registers added. Not finished, yet.
+//
+// Revision 1.13 2003/02/12 14:25:30 mohor
+// abort_tx added.
+//
+// Revision 1.12 2003/02/11 00:56:06 mohor
+// Wishbone interface added.
+//
+// Revision 1.11 2003/02/09 02:24:33 mohor
+// Bosch license warning added. Error counters finished. Overload frames
+// still need to be fixed.
+//
+// Revision 1.10 2003/01/31 01:13:38 mohor
+// backup.
+//
+// Revision 1.9 2003/01/15 13:16:48 mohor
+// When a frame with "remote request" is received, no data is stored
+// to fifo, just the frame information (identifier, ...). Data length
+// that is stored is the received data length and not the actual data
+// length that is stored to fifo.
+//
+// Revision 1.8 2003/01/14 17:25:09 mohor
+// Addresses corrected to decimal values (previously hex).
+//
+// Revision 1.7 2003/01/14 12:19:35 mohor
+// rx_fifo is now working.
+//
+// Revision 1.6 2003/01/10 17:51:34 mohor
+// Temporary version (backup).
+//
+// Revision 1.5 2003/01/09 14:46:58 mohor
+// Temporary files (backup).
+//
+// Revision 1.4 2003/01/08 02:10:55 mohor
+// Acceptance filter added.
+//
+// Revision 1.3 2002/12/27 00:12:52 mohor
+// Header changed, testbench improved to send a frame (crc still missing).
+//
+// Revision 1.2 2002/12/26 16:00:34 mohor
+// Testbench define file added. Clock divider register added.
+//
+// Revision 1.1.1.1 2002/12/20 16:39:21 mohor
+// Initial
+//
+//
+//
+
+// synopsys translate_off
+`include "timescale.v"
+// synopsys translate_on
+`include "can_defines.v"
+
+module can_registers
+(
+ clk,
+ rst,
+ cs,
+ we,
+ addr,
+ data_in,
+ data_out,
+ irq,
+
+ sample_point,
+ transmitting,
+ set_reset_mode,
+ node_bus_off,
+ error_status,
+ rx_err_cnt,
+ tx_err_cnt,
+ transmit_status,
+ receive_status,
+ tx_successful,
+ need_to_tx,
+ overrun,
+ info_empty,
+ set_bus_error_irq,
+ set_arbitration_lost_irq,
+ arbitration_lost_capture,
+ node_error_passive,
+ node_error_active,
+ rx_message_counter,
+
+
+ /* Mode register */
+ reset_mode,
+ listen_only_mode,
+ acceptance_filter_mode,
+ self_test_mode,
+
+
+ /* Command register */
+ clear_data_overrun,
+ release_buffer,
+ abort_tx,
+ tx_request,
+ self_rx_request,
+ single_shot_transmission,
+ tx_state,
+ tx_state_q,
+ overload_request,
+ overload_frame,
+
+ /* Arbitration Lost Capture Register */
+ read_arbitration_lost_capture_reg,
+
+ /* Error Code Capture Register */
+ read_error_code_capture_reg,
+ error_capture_code,
+
+ /* Bus Timing 0 register */
+ baud_r_presc,
+ sync_jump_width,
+
+ /* Bus Timing 1 register */
+ time_segment1,
+ time_segment2,
+ triple_sampling,
+
+ /* Error Warning Limit register */
+ error_warning_limit,
+
+ /* Rx Error Counter register */
+ we_rx_err_cnt,
+
+ /* Tx Error Counter register */
+ we_tx_err_cnt,
+
+ /* Clock Divider register */
+ extended_mode,
+ clkout,
+
+
+ /* This section is for BASIC and EXTENDED mode */
+ /* Acceptance code register */
+ acceptance_code_0,
+
+ /* Acceptance mask register */
+ acceptance_mask_0,
+ /* End: This section is for BASIC and EXTENDED mode */
+
+ /* This section is for EXTENDED mode */
+ /* Acceptance code register */
+ acceptance_code_1,
+ acceptance_code_2,
+ acceptance_code_3,
+
+ /* Acceptance mask register */
+ acceptance_mask_1,
+ acceptance_mask_2,
+ acceptance_mask_3,
+ /* End: This section is for EXTENDED mode */
+
+ /* Tx data registers. Holding identifier (basic mode), tx frame information (extended mode) and data */
+ tx_data_0,
+ tx_data_1,
+ tx_data_2,
+ tx_data_3,
+ tx_data_4,
+ tx_data_5,
+ tx_data_6,
+ tx_data_7,
+ tx_data_8,
+ tx_data_9,
+ tx_data_10,
+ tx_data_11,
+ tx_data_12
+ /* End: Tx data registers */
+
+
+
+
+);
+
+parameter Tp = 1;
+
+input clk;
+input rst;
+input cs;
+input we;
+input [7:0] addr;
+input [7:0] data_in;
+
+output [7:0] data_out;
+reg [7:0] data_out;
+
+output irq;
+
+input sample_point;
+input transmitting;
+input set_reset_mode;
+input node_bus_off;
+input error_status;
+input [7:0] rx_err_cnt;
+input [7:0] tx_err_cnt;
+input transmit_status;
+input receive_status;
+input tx_successful;
+input need_to_tx;
+input overrun;
+input info_empty;
+input set_bus_error_irq;
+input set_arbitration_lost_irq;
+input [4:0] arbitration_lost_capture;
+input node_error_passive;
+input node_error_active;
+input [6:0] rx_message_counter;
+
+
+
+/* Mode register */
+output reset_mode;
+output listen_only_mode;
+output acceptance_filter_mode;
+output self_test_mode;
+
+/* Command register */
+output clear_data_overrun;
+output release_buffer;
+output abort_tx;
+output tx_request;
+output self_rx_request;
+output single_shot_transmission;
+input tx_state;
+input tx_state_q;
+output overload_request;
+input overload_frame;
+
+
+/* Arbitration Lost Capture Register */
+output read_arbitration_lost_capture_reg;
+
+/* Error Code Capture Register */
+output read_error_code_capture_reg;
+input [7:0] error_capture_code;
+
+/* Bus Timing 0 register */
+output [5:0] baud_r_presc;
+output [1:0] sync_jump_width;
+
+
+/* Bus Timing 1 register */
+output [3:0] time_segment1;
+output [2:0] time_segment2;
+output triple_sampling;
+
+/* Error Warning Limit register */
+output [7:0] error_warning_limit;
+
+/* Rx Error Counter register */
+output we_rx_err_cnt;
+
+/* Tx Error Counter register */
+output we_tx_err_cnt;
+
+/* Clock Divider register */
+output extended_mode;
+output clkout;
+
+
+/* This section is for BASIC and EXTENDED mode */
+/* Acceptance code register */
+output [7:0] acceptance_code_0;
+
+/* Acceptance mask register */
+output [7:0] acceptance_mask_0;
+
+/* End: This section is for BASIC and EXTENDED mode */
+
+
+/* This section is for EXTENDED mode */
+/* Acceptance code register */
+output [7:0] acceptance_code_1;
+output [7:0] acceptance_code_2;
+output [7:0] acceptance_code_3;
+
+/* Acceptance mask register */
+output [7:0] acceptance_mask_1;
+output [7:0] acceptance_mask_2;
+output [7:0] acceptance_mask_3;
+
+/* End: This section is for EXTENDED mode */
+
+/* Tx data registers. Holding identifier (basic mode), tx frame information (extended mode) and data */
+output [7:0] tx_data_0;
+output [7:0] tx_data_1;
+output [7:0] tx_data_2;
+output [7:0] tx_data_3;
+output [7:0] tx_data_4;
+output [7:0] tx_data_5;
+output [7:0] tx_data_6;
+output [7:0] tx_data_7;
+output [7:0] tx_data_8;
+output [7:0] tx_data_9;
+output [7:0] tx_data_10;
+output [7:0] tx_data_11;
+output [7:0] tx_data_12;
+/* End: Tx data registers */
+
+
+reg tx_successful_q;
+reg overrun_q;
+reg overrun_status;
+reg transmission_complete;
+reg transmit_buffer_status_q;
+reg receive_buffer_status;
+reg error_status_q;
+reg node_bus_off_q;
+reg node_error_passive_q;
+reg transmit_buffer_status;
+reg single_shot_transmission;
+reg self_rx_request;
+
+// Some interrupts exist in basic mode and in extended mode. Since they are in different registers they need to be multiplexed.
+wire data_overrun_irq_en;
+wire error_warning_irq_en;
+wire transmit_irq_en;
+wire receive_irq_en;
+
+wire [7:0] irq_reg;
+
+wire we_mode = cs & we & (addr == 8'd0);
+wire we_command = cs & we & (addr == 8'd1);
+wire we_bus_timing_0 = cs & we & (addr == 8'd6) & reset_mode;
+wire we_bus_timing_1 = cs & we & (addr == 8'd7) & reset_mode;
+wire we_clock_divider_low = cs & we & (addr == 8'd31);
+wire we_clock_divider_hi = we_clock_divider_low & reset_mode;
+
+wire read = cs & (~we);
+wire read_irq_reg = read & (addr == 8'd3);
+assign read_arbitration_lost_capture_reg = read & extended_mode & (addr == 8'd11);
+assign read_error_code_capture_reg = read & extended_mode & (addr == 8'd12);
+
+/* This section is for BASIC and EXTENDED mode */
+wire we_acceptance_code_0 = cs & we & reset_mode & ((~extended_mode) & (addr == 8'd4) | extended_mode & (addr == 8'd16));
+wire we_acceptance_mask_0 = cs & we & reset_mode & ((~extended_mode) & (addr == 8'd5) | extended_mode & (addr == 8'd20));
+wire we_tx_data_0 = cs & we & (~reset_mode) & ((~extended_mode) & (addr == 8'd10) | extended_mode & (addr == 8'd16)) & transmit_buffer_status;
+wire we_tx_data_1 = cs & we & (~reset_mode) & ((~extended_mode) & (addr == 8'd11) | extended_mode & (addr == 8'd17)) & transmit_buffer_status;
+wire we_tx_data_2 = cs & we & (~reset_mode) & ((~extended_mode) & (addr == 8'd12) | extended_mode & (addr == 8'd18)) & transmit_buffer_status;
+wire we_tx_data_3 = cs & we & (~reset_mode) & ((~extended_mode) & (addr == 8'd13) | extended_mode & (addr == 8'd19)) & transmit_buffer_status;
+wire we_tx_data_4 = cs & we & (~reset_mode) & ((~extended_mode) & (addr == 8'd14) | extended_mode & (addr == 8'd20)) & transmit_buffer_status;
+wire we_tx_data_5 = cs & we & (~reset_mode) & ((~extended_mode) & (addr == 8'd15) | extended_mode & (addr == 8'd21)) & transmit_buffer_status;
+wire we_tx_data_6 = cs & we & (~reset_mode) & ((~extended_mode) & (addr == 8'd16) | extended_mode & (addr == 8'd22)) & transmit_buffer_status;
+wire we_tx_data_7 = cs & we & (~reset_mode) & ((~extended_mode) & (addr == 8'd17) | extended_mode & (addr == 8'd23)) & transmit_buffer_status;
+wire we_tx_data_8 = cs & we & (~reset_mode) & ((~extended_mode) & (addr == 8'd18) | extended_mode & (addr == 8'd24)) & transmit_buffer_status;
+wire we_tx_data_9 = cs & we & (~reset_mode) & ((~extended_mode) & (addr == 8'd19) | extended_mode & (addr == 8'd25)) & transmit_buffer_status;
+wire we_tx_data_10 = cs & we & (~reset_mode) & ( extended_mode & (addr == 8'd26)) & transmit_buffer_status;
+wire we_tx_data_11 = cs & we & (~reset_mode) & ( extended_mode & (addr == 8'd27)) & transmit_buffer_status;
+wire we_tx_data_12 = cs & we & (~reset_mode) & ( extended_mode & (addr == 8'd28)) & transmit_buffer_status;
+/* End: This section is for BASIC and EXTENDED mode */
+
+
+/* This section is for EXTENDED mode */
+wire we_interrupt_enable = cs & we & (addr == 8'd4) & extended_mode;
+wire we_error_warning_limit = cs & we & (addr == 8'd13) & reset_mode & extended_mode;
+assign we_rx_err_cnt = cs & we & (addr == 8'd14) & reset_mode & extended_mode;
+assign we_tx_err_cnt = cs & we & (addr == 8'd15) & reset_mode & extended_mode;
+wire we_acceptance_code_1 = cs & we & (addr == 8'd17) & reset_mode & extended_mode;
+wire we_acceptance_code_2 = cs & we & (addr == 8'd18) & reset_mode & extended_mode;
+wire we_acceptance_code_3 = cs & we & (addr == 8'd19) & reset_mode & extended_mode;
+wire we_acceptance_mask_1 = cs & we & (addr == 8'd21) & reset_mode & extended_mode;
+wire we_acceptance_mask_2 = cs & we & (addr == 8'd22) & reset_mode & extended_mode;
+wire we_acceptance_mask_3 = cs & we & (addr == 8'd23) & reset_mode & extended_mode;
+/* End: This section is for EXTENDED mode */
+
+
+
+always @ (posedge clk)
+begin
+ tx_successful_q <=#Tp tx_successful;
+ overrun_q <=#Tp overrun;
+ transmit_buffer_status_q <=#Tp transmit_buffer_status;
+ error_status_q <=#Tp error_status;
+ node_bus_off_q <=#Tp node_bus_off;
+ node_error_passive_q <=#Tp node_error_passive;
+end
+
+
+
+/* Mode register */
+wire [0:0] mode;
+wire [4:1] mode_basic;
+wire [3:1] mode_ext;
+wire receive_irq_en_basic;
+wire transmit_irq_en_basic;
+wire error_irq_en_basic;
+wire overrun_irq_en_basic;
+
+can_register_asyn_syn #(1, 1'h1) MODE_REG0
+( .data_in(data_in[0]),
+ .data_out(mode[0]),
+ .we(we_mode),
+ .clk(clk),
+ .rst(rst),
+ .rst_sync(set_reset_mode)
+);
+
+can_register_asyn #(4, 0) MODE_REG_BASIC
+( .data_in(data_in[4:1]),
+ .data_out(mode_basic[4:1]),
+ .we(we_mode),
+ .clk(clk),
+ .rst(rst)
+);
+
+can_register_asyn #(3, 0) MODE_REG_EXT
+( .data_in(data_in[3:1]),
+ .data_out(mode_ext[3:1]),
+ .we(we_mode & reset_mode),
+ .clk(clk),
+ .rst(rst)
+);
+
+assign reset_mode = mode[0];
+assign listen_only_mode = extended_mode & mode_ext[1];
+assign self_test_mode = extended_mode & mode_ext[2];
+assign acceptance_filter_mode = extended_mode & mode_ext[3];
+
+assign receive_irq_en_basic = mode_basic[1];
+assign transmit_irq_en_basic = mode_basic[2];
+assign error_irq_en_basic = mode_basic[3];
+assign overrun_irq_en_basic = mode_basic[4];
+/* End Mode register */
+
+
+/* Command register */
+wire [4:0] command;
+can_register_asyn_syn #(1, 1'h0) COMMAND_REG0
+( .data_in(data_in[0]),
+ .data_out(command[0]),
+ .we(we_command),
+ .clk(clk),
+ .rst(rst),
+ .rst_sync(command[0] & sample_point)
+);
+
+can_register_asyn_syn #(1, 1'h0) COMMAND_REG1
+( .data_in(data_in[1]),
+ .data_out(command[1]),
+ .we(we_command),
+ .clk(clk),
+ .rst(rst),
+ .rst_sync(sample_point & (tx_request | (abort_tx & ~transmitting)))
+);
+
+can_register_asyn_syn #(2, 2'h0) COMMAND_REG
+( .data_in(data_in[3:2]),
+ .data_out(command[3:2]),
+ .we(we_command),
+ .clk(clk),
+ .rst(rst),
+ .rst_sync(|command[3:2])
+);
+
+can_register_asyn_syn #(1, 1'h0) COMMAND_REG4
+( .data_in(data_in[4]),
+ .data_out(command[4]),
+ .we(we_command),
+ .clk(clk),
+ .rst(rst),
+ .rst_sync(command[4] & sample_point)
+);
+
+
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ self_rx_request <= 1'b0;
+ else if (command[4] & (~command[0]))
+ self_rx_request <=#Tp 1'b1;
+ else if ((~tx_state) & tx_state_q)
+ self_rx_request <=#Tp 1'b0;
+end
+
+
+assign clear_data_overrun = command[3];
+assign release_buffer = command[2];
+assign tx_request = command[0] | command[4];
+assign abort_tx = command[1] & (~tx_request);
+
+
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ single_shot_transmission <= 1'b0;
+ else if (tx_request & command[1] & sample_point)
+ single_shot_transmission <=#Tp 1'b1;
+ else if ((~tx_state) & tx_state_q)
+ single_shot_transmission <=#Tp 1'b0;
+end
+
+
+/*
+can_register_asyn_syn #(1, 1'h0) COMMAND_REG_OVERLOAD // Uncomment this to enable overload requests !!!
+( .data_in(data_in[5]),
+ .data_out(overload_request),
+ .we(we_command),
+ .clk(clk),
+ .rst(rst),
+ .rst_sync(overload_frame & ~overload_frame_q)
+);
+
+reg overload_frame_q;
+
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ overload_frame_q <= 1'b0;
+ else
+ overload_frame_q <=#Tp overload_frame;
+end
+*/
+assign overload_request = 0; // Overload requests are not supported, yet !!!
+
+
+
+
+
+/* End Command register */
+
+
+/* Status register */
+
+wire [7:0] status;
+
+assign status[7] = node_bus_off;
+assign status[6] = error_status;
+assign status[5] = transmit_status;
+assign status[4] = receive_status;
+assign status[3] = transmission_complete;
+assign status[2] = transmit_buffer_status;
+assign status[1] = overrun_status;
+assign status[0] = receive_buffer_status;
+
+
+
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ transmission_complete <= 1'b1;
+ else if (tx_successful & (~tx_successful_q) | abort_tx)
+ transmission_complete <=#Tp 1'b1;
+ else if (tx_request)
+ transmission_complete <=#Tp 1'b0;
+end
+
+
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ transmit_buffer_status <= 1'b1;
+ else if (tx_request)
+ transmit_buffer_status <=#Tp 1'b0;
+ else if (~need_to_tx)
+ transmit_buffer_status <=#Tp 1'b1;
+end
+
+
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ overrun_status <= 1'b0;
+ else if (overrun & (~overrun_q))
+ overrun_status <=#Tp 1'b1;
+ else if (clear_data_overrun)
+ overrun_status <=#Tp 1'b0;
+end
+
+
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ receive_buffer_status <= 1'b0;
+ else if (release_buffer)
+ receive_buffer_status <=#Tp 1'b0;
+ else if (~info_empty)
+ receive_buffer_status <=#Tp 1'b1;
+end
+
+/* End Status register */
+
+
+/* Interrupt Enable register (extended mode) */
+wire [7:0] irq_en_ext;
+wire bus_error_irq_en;
+wire arbitration_lost_irq_en;
+wire error_passive_irq_en;
+wire data_overrun_irq_en_ext;
+wire error_warning_irq_en_ext;
+wire transmit_irq_en_ext;
+wire receive_irq_en_ext;
+
+can_register #(8) IRQ_EN_REG
+( .data_in(data_in),
+ .data_out(irq_en_ext),
+ .we(we_interrupt_enable),
+ .clk(clk)
+);
+
+
+assign bus_error_irq_en = irq_en_ext[7];
+assign arbitration_lost_irq_en = irq_en_ext[6];
+assign error_passive_irq_en = irq_en_ext[5];
+assign data_overrun_irq_en_ext = irq_en_ext[3];
+assign error_warning_irq_en_ext = irq_en_ext[2];
+assign transmit_irq_en_ext = irq_en_ext[1];
+assign receive_irq_en_ext = irq_en_ext[0];
+/* End Bus Timing 0 register */
+
+
+/* Bus Timing 0 register */
+wire [7:0] bus_timing_0;
+can_register #(8) BUS_TIMING_0_REG
+( .data_in(data_in),
+ .data_out(bus_timing_0),
+ .we(we_bus_timing_0),
+ .clk(clk)
+);
+
+assign baud_r_presc = bus_timing_0[5:0];
+assign sync_jump_width = bus_timing_0[7:6];
+/* End Bus Timing 0 register */
+
+
+/* Bus Timing 1 register */
+wire [7:0] bus_timing_1;
+can_register #(8) BUS_TIMING_1_REG
+( .data_in(data_in),
+ .data_out(bus_timing_1),
+ .we(we_bus_timing_1),
+ .clk(clk)
+);
+
+assign time_segment1 = bus_timing_1[3:0];
+assign time_segment2 = bus_timing_1[6:4];
+assign triple_sampling = bus_timing_1[7];
+/* End Bus Timing 1 register */
+
+
+/* Error Warning Limit register */
+can_register_asyn #(8, 96) ERROR_WARNING_REG
+( .data_in(data_in),
+ .data_out(error_warning_limit),
+ .we(we_error_warning_limit),
+ .clk(clk),
+ .rst(rst)
+);
+/* End Error Warning Limit register */
+
+
+
+/* Clock Divider register */
+wire [7:0] clock_divider;
+wire clock_off;
+wire [2:0] cd;
+reg [2:0] clkout_div;
+reg [2:0] clkout_cnt;
+reg clkout_tmp;
+
+can_register_asyn #(1, 0) CLOCK_DIVIDER_REG_7
+( .data_in(data_in[7]),
+ .data_out(clock_divider[7]),
+ .we(we_clock_divider_hi),
+ .clk(clk),
+ .rst(rst)
+);
+
+assign clock_divider[6:4] = 3'h0;
+
+can_register_asyn #(1, 0) CLOCK_DIVIDER_REG_3
+( .data_in(data_in[3]),
+ .data_out(clock_divider[3]),
+ .we(we_clock_divider_hi),
+ .clk(clk),
+ .rst(rst)
+);
+
+can_register_asyn #(3, 0) CLOCK_DIVIDER_REG_LOW
+( .data_in(data_in[2:0]),
+ .data_out(clock_divider[2:0]),
+ .we(we_clock_divider_low),
+ .clk(clk),
+ .rst(rst)
+);
+
+assign extended_mode = clock_divider[7];
+assign clock_off = clock_divider[3];
+assign cd[2:0] = clock_divider[2:0];
+
+
+
+always @ (cd)
+begin
+ case (cd) /* synthesis full_case parallel_case */
+ 3'b000 : clkout_div = 3'd0;
+ 3'b001 : clkout_div = 3'd1;
+ 3'b010 : clkout_div = 3'd2;
+ 3'b011 : clkout_div = 3'd3;
+ 3'b100 : clkout_div = 3'd4;
+ 3'b101 : clkout_div = 3'd5;
+ 3'b110 : clkout_div = 3'd6;
+ 3'b111 : clkout_div = 3'd0;
+ endcase
+end
+
+
+
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ clkout_cnt <= 3'h0;
+ else if (clkout_cnt == clkout_div)
+ clkout_cnt <=#Tp 3'h0;
+ else
+ clkout_cnt <= clkout_cnt + 1'b1;
+end
+
+
+
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ clkout_tmp <= 1'b0;
+ else if (clkout_cnt == clkout_div)
+ clkout_tmp <=#Tp ~clkout_tmp;
+end
+
+
+assign clkout = clock_off ? 1'b1 : ((&cd)? clk : clkout_tmp);
+
+
+
+/* End Clock Divider register */
+
+
+
+
+/* This section is for BASIC and EXTENDED mode */
+
+/* Acceptance code register */
+can_register #(8) ACCEPTANCE_CODE_REG0
+( .data_in(data_in),
+ .data_out(acceptance_code_0),
+ .we(we_acceptance_code_0),
+ .clk(clk)
+);
+/* End: Acceptance code register */
+
+
+/* Acceptance mask register */
+can_register #(8) ACCEPTANCE_MASK_REG0
+( .data_in(data_in),
+ .data_out(acceptance_mask_0),
+ .we(we_acceptance_mask_0),
+ .clk(clk)
+);
+/* End: Acceptance mask register */
+/* End: This section is for BASIC and EXTENDED mode */
+
+
+/* Tx data 0 register. */
+can_register #(8) TX_DATA_REG0
+( .data_in(data_in),
+ .data_out(tx_data_0),
+ .we(we_tx_data_0),
+ .clk(clk)
+);
+/* End: Tx data 0 register. */
+
+
+/* Tx data 1 register. */
+can_register #(8) TX_DATA_REG1
+( .data_in(data_in),
+ .data_out(tx_data_1),
+ .we(we_tx_data_1),
+ .clk(clk)
+);
+/* End: Tx data 1 register. */
+
+
+/* Tx data 2 register. */
+can_register #(8) TX_DATA_REG2
+( .data_in(data_in),
+ .data_out(tx_data_2),
+ .we(we_tx_data_2),
+ .clk(clk)
+);
+/* End: Tx data 2 register. */
+
+
+/* Tx data 3 register. */
+can_register #(8) TX_DATA_REG3
+( .data_in(data_in),
+ .data_out(tx_data_3),
+ .we(we_tx_data_3),
+ .clk(clk)
+);
+/* End: Tx data 3 register. */
+
+
+/* Tx data 4 register. */
+can_register #(8) TX_DATA_REG4
+( .data_in(data_in),
+ .data_out(tx_data_4),
+ .we(we_tx_data_4),
+ .clk(clk)
+);
+/* End: Tx data 4 register. */
+
+
+/* Tx data 5 register. */
+can_register #(8) TX_DATA_REG5
+( .data_in(data_in),
+ .data_out(tx_data_5),
+ .we(we_tx_data_5),
+ .clk(clk)
+);
+/* End: Tx data 5 register. */
+
+
+/* Tx data 6 register. */
+can_register #(8) TX_DATA_REG6
+( .data_in(data_in),
+ .data_out(tx_data_6),
+ .we(we_tx_data_6),
+ .clk(clk)
+);
+/* End: Tx data 6 register. */
+
+
+/* Tx data 7 register. */
+can_register #(8) TX_DATA_REG7
+( .data_in(data_in),
+ .data_out(tx_data_7),
+ .we(we_tx_data_7),
+ .clk(clk)
+);
+/* End: Tx data 7 register. */
+
+
+/* Tx data 8 register. */
+can_register #(8) TX_DATA_REG8
+( .data_in(data_in),
+ .data_out(tx_data_8),
+ .we(we_tx_data_8),
+ .clk(clk)
+);
+/* End: Tx data 8 register. */
+
+
+/* Tx data 9 register. */
+can_register #(8) TX_DATA_REG9
+( .data_in(data_in),
+ .data_out(tx_data_9),
+ .we(we_tx_data_9),
+ .clk(clk)
+);
+/* End: Tx data 9 register. */
+
+
+/* Tx data 10 register. */
+can_register #(8) TX_DATA_REG10
+( .data_in(data_in),
+ .data_out(tx_data_10),
+ .we(we_tx_data_10),
+ .clk(clk)
+);
+/* End: Tx data 10 register. */
+
+
+/* Tx data 11 register. */
+can_register #(8) TX_DATA_REG11
+( .data_in(data_in),
+ .data_out(tx_data_11),
+ .we(we_tx_data_11),
+ .clk(clk)
+);
+/* End: Tx data 11 register. */
+
+
+/* Tx data 12 register. */
+can_register #(8) TX_DATA_REG12
+( .data_in(data_in),
+ .data_out(tx_data_12),
+ .we(we_tx_data_12),
+ .clk(clk)
+);
+/* End: Tx data 12 register. */
+
+
+
+
+
+/* This section is for EXTENDED mode */
+
+/* Acceptance code register 1 */
+can_register #(8) ACCEPTANCE_CODE_REG1
+( .data_in(data_in),
+ .data_out(acceptance_code_1),
+ .we(we_acceptance_code_1),
+ .clk(clk)
+);
+/* End: Acceptance code register */
+
+
+/* Acceptance code register 2 */
+can_register #(8) ACCEPTANCE_CODE_REG2
+( .data_in(data_in),
+ .data_out(acceptance_code_2),
+ .we(we_acceptance_code_2),
+ .clk(clk)
+);
+/* End: Acceptance code register */
+
+
+/* Acceptance code register 3 */
+can_register #(8) ACCEPTANCE_CODE_REG3
+( .data_in(data_in),
+ .data_out(acceptance_code_3),
+ .we(we_acceptance_code_3),
+ .clk(clk)
+);
+/* End: Acceptance code register */
+
+
+/* Acceptance mask register 1 */
+can_register #(8) ACCEPTANCE_MASK_REG1
+( .data_in(data_in),
+ .data_out(acceptance_mask_1),
+ .we(we_acceptance_mask_1),
+ .clk(clk)
+);
+/* End: Acceptance code register */
+
+
+/* Acceptance mask register 2 */
+can_register #(8) ACCEPTANCE_MASK_REG2
+( .data_in(data_in),
+ .data_out(acceptance_mask_2),
+ .we(we_acceptance_mask_2),
+ .clk(clk)
+);
+/* End: Acceptance code register */
+
+
+/* Acceptance mask register 3 */
+can_register #(8) ACCEPTANCE_MASK_REG3
+( .data_in(data_in),
+ .data_out(acceptance_mask_3),
+ .we(we_acceptance_mask_3),
+ .clk(clk)
+);
+/* End: Acceptance code register */
+
+
+/* End: This section is for EXTENDED mode */
+
+
+
+
+// Reading data from registers
+always @ ( addr or extended_mode or mode or bus_timing_0 or bus_timing_1 or clock_divider or
+ acceptance_code_0 or acceptance_code_1 or acceptance_code_2 or acceptance_code_3 or
+ acceptance_mask_0 or acceptance_mask_1 or acceptance_mask_2 or acceptance_mask_3 or
+ reset_mode or tx_data_0 or tx_data_1 or tx_data_2 or tx_data_3 or tx_data_4 or
+ tx_data_5 or tx_data_6 or tx_data_7 or tx_data_8 or tx_data_9 or status or
+ error_warning_limit or rx_err_cnt or tx_err_cnt or irq_en_ext or irq_reg or mode_ext or
+ arbitration_lost_capture or rx_message_counter or mode_basic or error_capture_code
+ )
+begin
+ case({extended_mode, addr[4:0]}) /* synthesis parallel_case */
+ {1'h1, 5'd00} : data_out = {4'b0000, mode_ext[3:1], mode[0]}; // extended mode
+ {1'h1, 5'd01} : data_out = 8'h0; // extended mode
+ {1'h1, 5'd02} : data_out = status; // extended mode
+ {1'h1, 5'd03} : data_out = irq_reg; // extended mode
+ {1'h1, 5'd04} : data_out = irq_en_ext; // extended mode
+ {1'h1, 5'd06} : data_out = bus_timing_0; // extended mode
+ {1'h1, 5'd07} : data_out = bus_timing_1; // extended mode
+ {1'h1, 5'd11} : data_out = {3'h0, arbitration_lost_capture[4:0]}; // extended mode
+ {1'h1, 5'd12} : data_out = error_capture_code; // extended mode
+ {1'h1, 5'd13} : data_out = error_warning_limit; // extended mode
+ {1'h1, 5'd14} : data_out = rx_err_cnt; // extended mode
+ {1'h1, 5'd15} : data_out = tx_err_cnt; // extended mode
+ {1'h1, 5'd16} : data_out = acceptance_code_0; // extended mode
+ {1'h1, 5'd17} : data_out = acceptance_code_1; // extended mode
+ {1'h1, 5'd18} : data_out = acceptance_code_2; // extended mode
+ {1'h1, 5'd19} : data_out = acceptance_code_3; // extended mode
+ {1'h1, 5'd20} : data_out = acceptance_mask_0; // extended mode
+ {1'h1, 5'd21} : data_out = acceptance_mask_1; // extended mode
+ {1'h1, 5'd22} : data_out = acceptance_mask_2; // extended mode
+ {1'h1, 5'd23} : data_out = acceptance_mask_3; // extended mode
+ {1'h1, 5'd24} : data_out = 8'h0; // extended mode
+ {1'h1, 5'd25} : data_out = 8'h0; // extended mode
+ {1'h1, 5'd26} : data_out = 8'h0; // extended mode
+ {1'h1, 5'd27} : data_out = 8'h0; // extended mode
+ {1'h1, 5'd28} : data_out = 8'h0; // extended mode
+ {1'h1, 5'd29} : data_out = {1'b0, rx_message_counter}; // extended mode
+ {1'h1, 5'd31} : data_out = clock_divider; // extended mode
+ {1'h0, 5'd00} : data_out = {3'b001, mode_basic[4:1], mode[0]}; // basic mode
+ {1'h0, 5'd01} : data_out = 8'hff; // basic mode
+ {1'h0, 5'd02} : data_out = status; // basic mode
+ {1'h0, 5'd03} : data_out = {4'hf, irq_reg[3:0]}; // basic mode
+ {1'h0, 5'd04} : data_out = reset_mode? acceptance_code_0 : 8'hff; // basic mode
+ {1'h0, 5'd05} : data_out = reset_mode? acceptance_mask_0 : 8'hff; // basic mode
+ {1'h0, 5'd06} : data_out = reset_mode? bus_timing_0 : 8'hff; // basic mode
+ {1'h0, 5'd07} : data_out = reset_mode? bus_timing_1 : 8'hff; // basic mode
+ {1'h0, 5'd10} : data_out = reset_mode? 8'hff : tx_data_0; // basic mode
+ {1'h0, 5'd11} : data_out = reset_mode? 8'hff : tx_data_1; // basic mode
+ {1'h0, 5'd12} : data_out = reset_mode? 8'hff : tx_data_2; // basic mode
+ {1'h0, 5'd13} : data_out = reset_mode? 8'hff : tx_data_3; // basic mode
+ {1'h0, 5'd14} : data_out = reset_mode? 8'hff : tx_data_4; // basic mode
+ {1'h0, 5'd15} : data_out = reset_mode? 8'hff : tx_data_5; // basic mode
+ {1'h0, 5'd16} : data_out = reset_mode? 8'hff : tx_data_6; // basic mode
+ {1'h0, 5'd17} : data_out = reset_mode? 8'hff : tx_data_7; // basic mode
+ {1'h0, 5'd18} : data_out = reset_mode? 8'hff : tx_data_8; // basic mode
+ {1'h0, 5'd19} : data_out = reset_mode? 8'hff : tx_data_9; // basic mode
+ {1'h0, 5'd31} : data_out = clock_divider; // basic mode
+ default : data_out = 8'h0; // the rest is read as 0
+ endcase
+end
+
+
+// Some interrupts exist in basic mode and in extended mode. Since they are in different registers they need to be multiplexed.
+assign data_overrun_irq_en = extended_mode ? data_overrun_irq_en_ext : overrun_irq_en_basic;
+assign error_warning_irq_en = extended_mode ? error_warning_irq_en_ext : error_irq_en_basic;
+assign transmit_irq_en = extended_mode ? transmit_irq_en_ext : transmit_irq_en_basic;
+assign receive_irq_en = extended_mode ? receive_irq_en_ext : receive_irq_en_basic;
+
+
+reg data_overrun_irq;
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ data_overrun_irq <= 1'b0;
+ else if (overrun & (~overrun_q) & data_overrun_irq_en)
+ data_overrun_irq <=#Tp 1'b1;
+ else if (read_irq_reg)
+ data_overrun_irq <=#Tp 1'b0;
+end
+
+
+reg transmit_irq;
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ transmit_irq <= 1'b0;
+ else if (transmit_buffer_status & (~transmit_buffer_status_q) & transmit_irq_en)
+ transmit_irq <=#Tp 1'b1;
+ else if (read_irq_reg)
+ transmit_irq <=#Tp 1'b0;
+end
+
+
+reg receive_irq;
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ receive_irq <= 1'b0;
+ else if (release_buffer)
+ receive_irq <=#Tp 1'b0;
+ else if ((~info_empty) & (~receive_irq) & receive_irq_en)
+ receive_irq <=#Tp 1'b1;
+end
+
+
+reg error_irq;
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ error_irq <= 1'b0;
+ else if (((error_status ^ error_status_q) | (node_bus_off ^ node_bus_off_q)) & error_warning_irq_en)
+ error_irq <=#Tp 1'b1;
+ else if (read_irq_reg)
+ error_irq <=#Tp 1'b0;
+end
+
+
+reg bus_error_irq;
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ bus_error_irq <= 1'b0;
+ else if (set_bus_error_irq & bus_error_irq_en)
+ bus_error_irq <=#Tp 1'b1;
+ else if (read_irq_reg)
+ bus_error_irq <=#Tp 1'b0;
+end
+
+
+reg arbitration_lost_irq;
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ arbitration_lost_irq <= 1'b0;
+ else if (set_arbitration_lost_irq & arbitration_lost_irq_en)
+ arbitration_lost_irq <=#Tp 1'b1;
+ else if (read_irq_reg)
+ arbitration_lost_irq <=#Tp 1'b0;
+end
+
+
+
+reg error_passive_irq;
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ error_passive_irq <= 1'b0;
+ else if ((node_error_passive & (~node_error_passive_q) | (~node_error_passive) & node_error_passive_q & node_error_active) & error_passive_irq_en)
+ error_passive_irq <=#Tp 1'b1;
+ else if (read_irq_reg)
+ error_passive_irq <=#Tp 1'b0;
+end
+
+
+
+assign irq_reg = {bus_error_irq, arbitration_lost_irq, error_passive_irq, 1'b0, data_overrun_irq, error_irq, transmit_irq, receive_irq};
+
+assign irq = data_overrun_irq | transmit_irq | receive_irq | error_irq | bus_error_irq | arbitration_lost_irq | error_passive_irq;
+
+
+
+
+
+endmodule
tags/rel_22/rtl/verilog/can_registers.v
Property changes :
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property
Index: tags/rel_22/rtl/verilog/can_top.v
===================================================================
--- tags/rel_22/rtl/verilog/can_top.v (nonexistent)
+++ tags/rel_22/rtl/verilog/can_top.v (revision 146)
@@ -0,0 +1,873 @@
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// can_top.v ////
+//// ////
+//// ////
+//// This file is part of the CAN Protocol Controller ////
+//// http://www.opencores.org/projects/can/ ////
+//// ////
+//// ////
+//// Author(s): ////
+//// Igor Mohor ////
+//// igorm@opencores.org ////
+//// ////
+//// ////
+//// All additional information is available in the README.txt ////
+//// file. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// Copyright (C) 2002, 2003, 2004 Authors ////
+//// ////
+//// This source file may be used and distributed without ////
+//// restriction provided that this copyright statement is not ////
+//// removed from the file and that any derivative work contains ////
+//// the original copyright notice and the associated disclaimer. ////
+//// ////
+//// This source file is free software; you can redistribute it ////
+//// and/or modify it under the terms of the GNU Lesser General ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any ////
+//// later version. ////
+//// ////
+//// This source is distributed in the hope that it will be ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
+//// PURPOSE. See the GNU Lesser General Public License for more ////
+//// details. ////
+//// ////
+//// You should have received a copy of the GNU Lesser General ////
+//// Public License along with this source; if not, download it ////
+//// from http://www.opencores.org/lgpl.shtml ////
+//// ////
+//// The CAN protocol is developed by Robert Bosch GmbH and ////
+//// protected by patents. Anybody who wants to implement this ////
+//// CAN IP core on silicon has to obtain a CAN protocol license ////
+//// from Bosch. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//
+// CVS Revision History
+//
+// $Log: not supported by cvs2svn $
+// Revision 1.46 2003/10/17 05:55:20 markom
+// mbist signals updated according to newest convention
+//
+// Revision 1.45 2003/09/30 00:55:13 mohor
+// Error counters fixed to be compatible with Bosch VHDL reference model.
+// Small synchronization changes.
+//
+// Revision 1.44 2003/09/25 18:55:49 mohor
+// Synchronization changed, error counters fixed.
+//
+// Revision 1.43 2003/08/20 09:57:39 mohor
+// Tristate signal tx_o is separated to tx_o and tx_oen_o. Both signals need
+// to be joined together on higher level.
+//
+// Revision 1.42 2003/07/16 15:11:28 mohor
+// Fixed according to the linter.
+//
+// Revision 1.41 2003/07/10 15:32:27 mohor
+// Unused signal removed.
+//
+// Revision 1.40 2003/07/10 01:59:04 tadejm
+// Synchronization fixed. In some strange cases it didn't work according to
+// the VHDL reference model.
+//
+// Revision 1.39 2003/07/07 11:21:37 mohor
+// Little fixes (to fix warnings).
+//
+// Revision 1.38 2003/07/03 09:32:20 mohor
+// Synchronization changed.
+//
+// Revision 1.37 2003/06/27 20:56:15 simons
+// Virtual silicon ram instances added.
+//
+// Revision 1.36 2003/06/17 14:30:30 mohor
+// "chip select" signal cs_can_i is used only when not using WISHBONE
+// interface.
+//
+// Revision 1.35 2003/06/16 13:57:58 mohor
+// tx_point generated one clk earlier. rx_i registered. Data corrected when
+// using extended mode.
+//
+// Revision 1.34 2003/06/13 15:02:24 mohor
+// Synchronization is also needed when transmitting a message.
+//
+// Revision 1.33 2003/06/11 14:21:35 mohor
+// When switching to tx, sync stage is overjumped.
+//
+// Revision 1.32 2003/06/09 11:32:36 mohor
+// Ports added for the CAN_BIST.
+//
+// Revision 1.31 2003/03/26 11:19:46 mohor
+// CAN interrupt is active low.
+//
+// Revision 1.30 2003/03/20 17:01:17 mohor
+// unix.
+//
+// Revision 1.28 2003/03/14 19:36:48 mohor
+// can_cs signal used for generation of the cs.
+//
+// Revision 1.27 2003/03/12 05:56:33 mohor
+// Bidirectional port_0_i changed to port_0_io.
+// input cs_can changed to cs_can_i.
+//
+// Revision 1.26 2003/03/12 04:39:40 mohor
+// rd_i and wr_i are active high signals. If 8051 is connected, these two signals
+// need to be negated one level higher.
+//
+// Revision 1.25 2003/03/12 04:17:36 mohor
+// 8051 interface added (besides WISHBONE interface). Selection is made in
+// can_defines.v file.
+//
+// Revision 1.24 2003/03/10 17:24:40 mohor
+// wire declaration added.
+//
+// Revision 1.23 2003/03/05 15:33:13 mohor
+// tx_o is now tristated signal. tx_oen and tx_o combined together.
+//
+// Revision 1.22 2003/03/05 15:01:56 mohor
+// Top level signal names changed.
+//
+// Revision 1.21 2003/03/01 22:53:33 mohor
+// Actel APA ram supported.
+//
+// Revision 1.20 2003/02/19 15:09:02 mohor
+// Incomplete sensitivity list fixed.
+//
+// Revision 1.19 2003/02/19 15:04:14 mohor
+// Typo fixed.
+//
+// Revision 1.18 2003/02/19 14:44:03 mohor
+// CAN core finished. Host interface added. Registers finished.
+// Synchronization to the wishbone finished.
+//
+// Revision 1.17 2003/02/18 00:10:15 mohor
+// Most of the registers added. Registers "arbitration lost capture", "error code
+// capture" + few more still need to be added.
+//
+// Revision 1.16 2003/02/14 20:17:01 mohor
+// Several registers added. Not finished, yet.
+//
+// Revision 1.15 2003/02/12 14:25:30 mohor
+// abort_tx added.
+//
+// Revision 1.14 2003/02/11 00:56:06 mohor
+// Wishbone interface added.
+//
+// Revision 1.13 2003/02/09 18:40:29 mohor
+// Overload fixed. Hard synchronization also enabled at the last bit of
+// interframe.
+//
+// Revision 1.12 2003/02/09 02:24:33 mohor
+// Bosch license warning added. Error counters finished. Overload frames
+// still need to be fixed.
+//
+// Revision 1.11 2003/02/04 14:34:52 mohor
+// *** empty log message ***
+//
+// Revision 1.10 2003/01/31 01:13:38 mohor
+// backup.
+//
+// Revision 1.9 2003/01/15 13:16:48 mohor
+// When a frame with "remote request" is received, no data is stored to
+// fifo, just the frame information (identifier, ...). Data length that
+// is stored is the received data length and not the actual data length
+// that is stored to fifo.
+//
+// Revision 1.8 2003/01/14 17:25:09 mohor
+// Addresses corrected to decimal values (previously hex).
+//
+// Revision 1.7 2003/01/10 17:51:34 mohor
+// Temporary version (backup).
+//
+// Revision 1.6 2003/01/09 21:54:45 mohor
+// rx fifo added. Not 100 % verified, yet.
+//
+// Revision 1.5 2003/01/08 02:10:56 mohor
+// Acceptance filter added.
+//
+// Revision 1.4 2002/12/28 04:13:23 mohor
+// Backup version.
+//
+// Revision 1.3 2002/12/27 00:12:52 mohor
+// Header changed, testbench improved to send a frame (crc still missing).
+//
+// Revision 1.2 2002/12/26 16:00:34 mohor
+// Testbench define file added. Clock divider register added.
+//
+// Revision 1.1.1.1 2002/12/20 16:39:21 mohor
+// Initial
+//
+//
+//
+
+// synopsys translate_off
+`include "timescale.v"
+// synopsys translate_on
+`include "can_defines.v"
+
+module can_top
+(
+ `ifdef CAN_WISHBONE_IF
+ wb_clk_i,
+ wb_rst_i,
+ wb_dat_i,
+ wb_dat_o,
+ wb_cyc_i,
+ wb_stb_i,
+ wb_we_i,
+ wb_adr_i,
+ wb_ack_o,
+ `else
+ rst_i,
+ ale_i,
+ rd_i,
+ wr_i,
+ port_0_io,
+ cs_can_i,
+ `endif
+ clk_i,
+ rx_i,
+ tx_o,
+ bus_off_on,
+ irq_on,
+ clkout_o
+
+ // Bist
+`ifdef CAN_BIST
+ ,
+ // debug chain signals
+ mbist_si_i, // bist scan serial in
+ mbist_so_o, // bist scan serial out
+ mbist_ctrl_i // bist chain shift control
+`endif
+);
+
+parameter Tp = 1;
+
+
+`ifdef CAN_WISHBONE_IF
+ input wb_clk_i;
+ input wb_rst_i;
+ input [7:0] wb_dat_i;
+ output [7:0] wb_dat_o;
+ input wb_cyc_i;
+ input wb_stb_i;
+ input wb_we_i;
+ input [7:0] wb_adr_i;
+ output wb_ack_o;
+
+ reg wb_ack_o;
+ reg cs_sync1;
+ reg cs_sync2;
+ reg cs_sync3;
+
+ reg cs_ack1;
+ reg cs_ack2;
+ reg cs_ack3;
+ reg cs_sync_rst1;
+ reg cs_sync_rst2;
+ wire cs_can_i;
+`else
+ input rst_i;
+ input ale_i;
+ input rd_i;
+ input wr_i;
+ inout [7:0] port_0_io;
+ input cs_can_i;
+
+ reg [7:0] addr_latched;
+ reg wr_i_q;
+ reg rd_i_q;
+`endif
+
+input clk_i;
+input rx_i;
+output tx_o;
+output bus_off_on;
+output irq_on;
+output clkout_o;
+
+// Bist
+`ifdef CAN_BIST
+input mbist_si_i; // bist scan serial in
+output mbist_so_o; // bist scan serial out
+input [`CAN_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i; // bist chain shift control
+`endif
+
+reg data_out_fifo_selected;
+
+
+wire irq_o;
+wire [7:0] data_out_fifo;
+wire [7:0] data_out_regs;
+
+
+/* Mode register */
+wire reset_mode;
+wire listen_only_mode;
+wire acceptance_filter_mode;
+wire self_test_mode;
+
+/* Command register */
+wire release_buffer;
+wire tx_request;
+wire abort_tx;
+wire self_rx_request;
+wire single_shot_transmission;
+wire tx_state;
+wire tx_state_q;
+wire overload_request;
+wire overload_frame;
+
+
+/* Arbitration Lost Capture Register */
+wire read_arbitration_lost_capture_reg;
+
+/* Error Code Capture Register */
+wire read_error_code_capture_reg;
+wire [7:0] error_capture_code;
+
+/* Bus Timing 0 register */
+wire [5:0] baud_r_presc;
+wire [1:0] sync_jump_width;
+
+/* Bus Timing 1 register */
+wire [3:0] time_segment1;
+wire [2:0] time_segment2;
+wire triple_sampling;
+
+/* Error Warning Limit register */
+wire [7:0] error_warning_limit;
+
+/* Rx Error Counter register */
+wire we_rx_err_cnt;
+
+/* Tx Error Counter register */
+wire we_tx_err_cnt;
+
+/* Clock Divider register */
+wire extended_mode;
+
+/* This section is for BASIC and EXTENDED mode */
+/* Acceptance code register */
+wire [7:0] acceptance_code_0;
+
+/* Acceptance mask register */
+wire [7:0] acceptance_mask_0;
+/* End: This section is for BASIC and EXTENDED mode */
+
+
+/* This section is for EXTENDED mode */
+/* Acceptance code register */
+wire [7:0] acceptance_code_1;
+wire [7:0] acceptance_code_2;
+wire [7:0] acceptance_code_3;
+
+/* Acceptance mask register */
+wire [7:0] acceptance_mask_1;
+wire [7:0] acceptance_mask_2;
+wire [7:0] acceptance_mask_3;
+/* End: This section is for EXTENDED mode */
+
+/* Tx data registers. Holding identifier (basic mode), tx frame information (extended mode) and data */
+wire [7:0] tx_data_0;
+wire [7:0] tx_data_1;
+wire [7:0] tx_data_2;
+wire [7:0] tx_data_3;
+wire [7:0] tx_data_4;
+wire [7:0] tx_data_5;
+wire [7:0] tx_data_6;
+wire [7:0] tx_data_7;
+wire [7:0] tx_data_8;
+wire [7:0] tx_data_9;
+wire [7:0] tx_data_10;
+wire [7:0] tx_data_11;
+wire [7:0] tx_data_12;
+/* End: Tx data registers */
+
+wire cs;
+
+/* Output signals from can_btl module */
+wire sample_point;
+wire sampled_bit;
+wire sampled_bit_q;
+wire tx_point;
+wire hard_sync;
+
+/* output from can_bsp module */
+wire rx_idle;
+wire transmitting;
+wire transmitter;
+wire go_rx_inter;
+wire not_first_bit_of_inter;
+wire set_reset_mode;
+wire node_bus_off;
+wire error_status;
+wire [7:0] rx_err_cnt;
+wire [7:0] tx_err_cnt;
+wire rx_err_cnt_dummy; // The MSB is not displayed. It is just used for easier calculation (no counter overflow).
+wire tx_err_cnt_dummy; // The MSB is not displayed. It is just used for easier calculation (no counter overflow).
+wire transmit_status;
+wire receive_status;
+wire tx_successful;
+wire need_to_tx;
+wire overrun;
+wire info_empty;
+wire set_bus_error_irq;
+wire set_arbitration_lost_irq;
+wire [4:0] arbitration_lost_capture;
+wire node_error_passive;
+wire node_error_active;
+wire [6:0] rx_message_counter;
+wire tx_next;
+
+wire go_overload_frame;
+wire go_error_frame;
+wire go_tx;
+wire send_ack;
+
+wire rst;
+wire we;
+wire [7:0] addr;
+wire [7:0] data_in;
+reg [7:0] data_out;
+reg rx_sync_tmp;
+reg rx_sync;
+
+/* Connecting can_registers module */
+can_registers i_can_registers
+(
+ .clk(clk_i),
+ .rst(rst),
+ .cs(cs),
+ .we(we),
+ .addr(addr),
+ .data_in(data_in),
+ .data_out(data_out_regs),
+ .irq(irq_o),
+
+ .sample_point(sample_point),
+ .transmitting(transmitting),
+ .set_reset_mode(set_reset_mode),
+ .node_bus_off(node_bus_off),
+ .error_status(error_status),
+ .rx_err_cnt(rx_err_cnt),
+ .tx_err_cnt(tx_err_cnt),
+ .transmit_status(transmit_status),
+ .receive_status(receive_status),
+ .tx_successful(tx_successful),
+ .need_to_tx(need_to_tx),
+ .overrun(overrun),
+ .info_empty(info_empty),
+ .set_bus_error_irq(set_bus_error_irq),
+ .set_arbitration_lost_irq(set_arbitration_lost_irq),
+ .arbitration_lost_capture(arbitration_lost_capture),
+ .node_error_passive(node_error_passive),
+ .node_error_active(node_error_active),
+ .rx_message_counter(rx_message_counter),
+
+
+ /* Mode register */
+ .reset_mode(reset_mode),
+ .listen_only_mode(listen_only_mode),
+ .acceptance_filter_mode(acceptance_filter_mode),
+ .self_test_mode(self_test_mode),
+
+ /* Command register */
+ .clear_data_overrun(),
+ .release_buffer(release_buffer),
+ .abort_tx(abort_tx),
+ .tx_request(tx_request),
+ .self_rx_request(self_rx_request),
+ .single_shot_transmission(single_shot_transmission),
+ .tx_state(tx_state),
+ .tx_state_q(tx_state_q),
+ .overload_request(overload_request),
+ .overload_frame(overload_frame),
+
+ /* Arbitration Lost Capture Register */
+ .read_arbitration_lost_capture_reg(read_arbitration_lost_capture_reg),
+
+ /* Error Code Capture Register */
+ .read_error_code_capture_reg(read_error_code_capture_reg),
+ .error_capture_code(error_capture_code),
+
+ /* Bus Timing 0 register */
+ .baud_r_presc(baud_r_presc),
+ .sync_jump_width(sync_jump_width),
+
+ /* Bus Timing 1 register */
+ .time_segment1(time_segment1),
+ .time_segment2(time_segment2),
+ .triple_sampling(triple_sampling),
+
+ /* Error Warning Limit register */
+ .error_warning_limit(error_warning_limit),
+
+ /* Rx Error Counter register */
+ .we_rx_err_cnt(we_rx_err_cnt),
+
+ /* Tx Error Counter register */
+ .we_tx_err_cnt(we_tx_err_cnt),
+
+ /* Clock Divider register */
+ .extended_mode(extended_mode),
+ .clkout(clkout_o),
+
+ /* This section is for BASIC and EXTENDED mode */
+ /* Acceptance code register */
+ .acceptance_code_0(acceptance_code_0),
+
+ /* Acceptance mask register */
+ .acceptance_mask_0(acceptance_mask_0),
+ /* End: This section is for BASIC and EXTENDED mode */
+
+ /* This section is for EXTENDED mode */
+ /* Acceptance code register */
+ .acceptance_code_1(acceptance_code_1),
+ .acceptance_code_2(acceptance_code_2),
+ .acceptance_code_3(acceptance_code_3),
+
+ /* Acceptance mask register */
+ .acceptance_mask_1(acceptance_mask_1),
+ .acceptance_mask_2(acceptance_mask_2),
+ .acceptance_mask_3(acceptance_mask_3),
+ /* End: This section is for EXTENDED mode */
+
+ /* Tx data registers. Holding identifier (basic mode), tx frame information (extended mode) and data */
+ .tx_data_0(tx_data_0),
+ .tx_data_1(tx_data_1),
+ .tx_data_2(tx_data_2),
+ .tx_data_3(tx_data_3),
+ .tx_data_4(tx_data_4),
+ .tx_data_5(tx_data_5),
+ .tx_data_6(tx_data_6),
+ .tx_data_7(tx_data_7),
+ .tx_data_8(tx_data_8),
+ .tx_data_9(tx_data_9),
+ .tx_data_10(tx_data_10),
+ .tx_data_11(tx_data_11),
+ .tx_data_12(tx_data_12)
+ /* End: Tx data registers */
+);
+
+
+assign irq_on = ~irq_o;
+
+
+/* Connecting can_btl module */
+can_btl i_can_btl
+(
+ .clk(clk_i),
+ .rst(rst),
+ .rx(rx_sync),
+ .tx(tx_o),
+
+ /* Bus Timing 0 register */
+ .baud_r_presc(baud_r_presc),
+ .sync_jump_width(sync_jump_width),
+
+ /* Bus Timing 1 register */
+ .time_segment1(time_segment1),
+ .time_segment2(time_segment2),
+ .triple_sampling(triple_sampling),
+
+ /* Output signals from this module */
+ .sample_point(sample_point),
+ .sampled_bit(sampled_bit),
+ .sampled_bit_q(sampled_bit_q),
+ .tx_point(tx_point),
+ .hard_sync(hard_sync),
+
+
+ /* output from can_bsp module */
+ .rx_idle(rx_idle),
+ .rx_inter(rx_inter),
+ .transmitting(transmitting),
+ .transmitter(transmitter),
+ .go_rx_inter(go_rx_inter),
+ .tx_next(tx_next),
+
+ .go_overload_frame(go_overload_frame),
+ .go_error_frame(go_error_frame),
+ .go_tx(go_tx),
+ .send_ack(send_ack),
+ .node_error_passive(node_error_passive)
+
+
+
+);
+
+
+
+can_bsp i_can_bsp
+(
+ .clk(clk_i),
+ .rst(rst),
+
+ /* From btl module */
+ .sample_point(sample_point),
+ .sampled_bit(sampled_bit),
+ .sampled_bit_q(sampled_bit_q),
+ .tx_point(tx_point),
+ .hard_sync(hard_sync),
+
+ .addr(addr),
+ .data_in(data_in),
+ .data_out(data_out_fifo),
+ .fifo_selected(data_out_fifo_selected),
+
+ /* Mode register */
+ .reset_mode(reset_mode),
+ .listen_only_mode(listen_only_mode),
+ .acceptance_filter_mode(acceptance_filter_mode),
+ .self_test_mode(self_test_mode),
+
+ /* Command register */
+ .release_buffer(release_buffer),
+ .tx_request(tx_request),
+ .abort_tx(abort_tx),
+ .self_rx_request(self_rx_request),
+ .single_shot_transmission(single_shot_transmission),
+ .tx_state(tx_state),
+ .tx_state_q(tx_state_q),
+ .overload_request(overload_request),
+ .overload_frame(overload_frame),
+
+ /* Arbitration Lost Capture Register */
+ .read_arbitration_lost_capture_reg(read_arbitration_lost_capture_reg),
+
+ /* Error Code Capture Register */
+ .read_error_code_capture_reg(read_error_code_capture_reg),
+ .error_capture_code(error_capture_code),
+
+ /* Error Warning Limit register */
+ .error_warning_limit(error_warning_limit),
+
+ /* Rx Error Counter register */
+ .we_rx_err_cnt(we_rx_err_cnt),
+
+ /* Tx Error Counter register */
+ .we_tx_err_cnt(we_tx_err_cnt),
+
+ /* Clock Divider register */
+ .extended_mode(extended_mode),
+
+ /* output from can_bsp module */
+ .rx_idle(rx_idle),
+ .transmitting(transmitting),
+ .transmitter(transmitter),
+ .go_rx_inter(go_rx_inter),
+ .not_first_bit_of_inter(not_first_bit_of_inter),
+ .rx_inter(rx_inter),
+ .set_reset_mode(set_reset_mode),
+ .node_bus_off(node_bus_off),
+ .error_status(error_status),
+ .rx_err_cnt({rx_err_cnt_dummy, rx_err_cnt[7:0]}), // The MSB is not displayed. It is just used for easier calculation (no counter overflow).
+ .tx_err_cnt({tx_err_cnt_dummy, tx_err_cnt[7:0]}), // The MSB is not displayed. It is just used for easier calculation (no counter overflow).
+ .transmit_status(transmit_status),
+ .receive_status(receive_status),
+ .tx_successful(tx_successful),
+ .need_to_tx(need_to_tx),
+ .overrun(overrun),
+ .info_empty(info_empty),
+ .set_bus_error_irq(set_bus_error_irq),
+ .set_arbitration_lost_irq(set_arbitration_lost_irq),
+ .arbitration_lost_capture(arbitration_lost_capture),
+ .node_error_passive(node_error_passive),
+ .node_error_active(node_error_active),
+ .rx_message_counter(rx_message_counter),
+
+ /* This section is for BASIC and EXTENDED mode */
+ /* Acceptance code register */
+ .acceptance_code_0(acceptance_code_0),
+
+ /* Acceptance mask register */
+ .acceptance_mask_0(acceptance_mask_0),
+ /* End: This section is for BASIC and EXTENDED mode */
+
+ /* This section is for EXTENDED mode */
+ /* Acceptance code register */
+ .acceptance_code_1(acceptance_code_1),
+ .acceptance_code_2(acceptance_code_2),
+ .acceptance_code_3(acceptance_code_3),
+
+ /* Acceptance mask register */
+ .acceptance_mask_1(acceptance_mask_1),
+ .acceptance_mask_2(acceptance_mask_2),
+ .acceptance_mask_3(acceptance_mask_3),
+ /* End: This section is for EXTENDED mode */
+
+ /* Tx data registers. Holding identifier (basic mode), tx frame information (extended mode) and data */
+ .tx_data_0(tx_data_0),
+ .tx_data_1(tx_data_1),
+ .tx_data_2(tx_data_2),
+ .tx_data_3(tx_data_3),
+ .tx_data_4(tx_data_4),
+ .tx_data_5(tx_data_5),
+ .tx_data_6(tx_data_6),
+ .tx_data_7(tx_data_7),
+ .tx_data_8(tx_data_8),
+ .tx_data_9(tx_data_9),
+ .tx_data_10(tx_data_10),
+ .tx_data_11(tx_data_11),
+ .tx_data_12(tx_data_12),
+ /* End: Tx data registers */
+
+ /* Tx signal */
+ .tx(tx_o),
+ .tx_next(tx_next),
+ .bus_off_on(bus_off_on),
+
+ .go_overload_frame(go_overload_frame),
+ .go_error_frame(go_error_frame),
+ .go_tx(go_tx),
+ .send_ack(send_ack)
+
+
+`ifdef CAN_BIST
+ ,
+ /* BIST signals */
+ .mbist_si_i(mbist_si_i),
+ .mbist_so_o(mbist_so_o),
+ .mbist_ctrl_i(mbist_ctrl_i)
+`endif
+);
+
+
+
+// Multiplexing wb_dat_o from registers and rx fifo
+always @ (extended_mode or addr or reset_mode)
+begin
+ if (extended_mode & (~reset_mode) & ((addr >= 8'd16) && (addr <= 8'd28)) | (~extended_mode) & ((addr >= 8'd20) && (addr <= 8'd29)))
+ data_out_fifo_selected = 1'b1;
+ else
+ data_out_fifo_selected = 1'b0;
+end
+
+
+always @ (posedge clk_i)
+begin
+ if (cs & (~we))
+ begin
+ if (data_out_fifo_selected)
+ data_out <=#Tp data_out_fifo;
+ else
+ data_out <=#Tp data_out_regs;
+ end
+end
+
+
+
+always @ (posedge clk_i or posedge rst)
+begin
+ if (rst)
+ begin
+ rx_sync_tmp <= 1'b1;
+ rx_sync <= 1'b1;
+ end
+ else
+ begin
+ rx_sync_tmp <=#Tp rx_i;
+ rx_sync <=#Tp rx_sync_tmp;
+ end
+end
+
+
+
+`ifdef CAN_WISHBONE_IF
+
+ assign cs_can_i = 1'b1;
+
+ // Combining wb_cyc_i and wb_stb_i signals to cs signal. Than synchronizing to clk_i clock domain.
+ always @ (posedge clk_i or posedge rst)
+ begin
+ if (rst)
+ begin
+ cs_sync1 <= 1'b0;
+ cs_sync2 <= 1'b0;
+ cs_sync3 <= 1'b0;
+ cs_sync_rst1 <= 1'b0;
+ cs_sync_rst2 <= 1'b0;
+ end
+ else
+ begin
+ cs_sync1 <=#Tp wb_cyc_i & wb_stb_i & (~cs_sync_rst2) & cs_can_i;
+ cs_sync2 <=#Tp cs_sync1 & (~cs_sync_rst2);
+ cs_sync3 <=#Tp cs_sync2 & (~cs_sync_rst2);
+ cs_sync_rst1 <=#Tp cs_ack3;
+ cs_sync_rst2 <=#Tp cs_sync_rst1;
+ end
+ end
+
+
+ assign cs = cs_sync2 & (~cs_sync3);
+
+
+ always @ (posedge wb_clk_i)
+ begin
+ cs_ack1 <=#Tp cs_sync3;
+ cs_ack2 <=#Tp cs_ack1;
+ cs_ack3 <=#Tp cs_ack2;
+ end
+
+
+
+ // Generating acknowledge signal
+ always @ (posedge wb_clk_i)
+ begin
+ wb_ack_o <=#Tp (cs_ack2 & (~cs_ack3));
+ end
+
+
+ assign rst = wb_rst_i;
+ assign we = wb_we_i;
+ assign addr = wb_adr_i;
+ assign data_in = wb_dat_i;
+ assign wb_dat_o = data_out;
+
+
+`else
+
+ // Latching address
+ always @ (posedge clk_i or posedge rst)
+ begin
+ if (rst)
+ addr_latched <= 8'h0;
+ else if (ale_i)
+ addr_latched <=#Tp port_0_io;
+ end
+
+
+ // Generating delayed wr_i and rd_i signals
+ always @ (posedge clk_i or posedge rst)
+ begin
+ if (rst)
+ begin
+ wr_i_q <= 1'b0;
+ rd_i_q <= 1'b0;
+ end
+ else
+ begin
+ wr_i_q <=#Tp wr_i;
+ rd_i_q <=#Tp rd_i;
+ end
+ end
+
+
+ assign cs = ((wr_i & (~wr_i_q)) | (rd_i & (~rd_i_q))) & cs_can_i;
+
+
+ assign rst = rst_i;
+ assign we = wr_i;
+ assign addr = addr_latched;
+ assign data_in = port_0_io;
+ assign port_0_io = (cs_can_i & rd_i)? data_out : 8'hz;
+
+`endif
+
+
+endmodule
Index: tags/rel_22/rtl/verilog/can_register_syn.v
===================================================================
--- tags/rel_22/rtl/verilog/can_register_syn.v (nonexistent)
+++ tags/rel_22/rtl/verilog/can_register_syn.v (revision 146)
@@ -0,0 +1,105 @@
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// can_register_syn.v ////
+//// ////
+//// ////
+//// This file is part of the CAN Protocol Controller ////
+//// http://www.opencores.org/projects/can/ ////
+//// ////
+//// ////
+//// Author(s): ////
+//// Igor Mohor ////
+//// igorm@opencores.org ////
+//// ////
+//// ////
+//// All additional information is available in the README.txt ////
+//// file. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// Copyright (C) 2002, 2003, 2004 Authors ////
+//// ////
+//// This source file may be used and distributed without ////
+//// restriction provided that this copyright statement is not ////
+//// removed from the file and that any derivative work contains ////
+//// the original copyright notice and the associated disclaimer. ////
+//// ////
+//// This source file is free software; you can redistribute it ////
+//// and/or modify it under the terms of the GNU Lesser General ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any ////
+//// later version. ////
+//// ////
+//// This source is distributed in the hope that it will be ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
+//// PURPOSE. See the GNU Lesser General Public License for more ////
+//// details. ////
+//// ////
+//// You should have received a copy of the GNU Lesser General ////
+//// Public License along with this source; if not, download it ////
+//// from http://www.opencores.org/lgpl.shtml ////
+//// ////
+//// The CAN protocol is developed by Robert Bosch GmbH and ////
+//// protected by patents. Anybody who wants to implement this ////
+//// CAN IP core on silicon has to obtain a CAN protocol license ////
+//// from Bosch. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//
+// CVS Revision History
+//
+// $Log: not supported by cvs2svn $
+// Revision 1.4 2003/03/11 16:31:58 mohor
+// timescale.v is used for simulation only.
+//
+// Revision 1.3 2003/02/09 02:24:33 mohor
+// Bosch license warning added. Error counters finished. Overload frames
+// still need to be fixed.
+//
+// Revision 1.2 2002/12/27 00:12:52 mohor
+// Header changed, testbench improved to send a frame (crc still missing).
+//
+// Revision 1.1.1.1 2002/12/20 16:39:21 mohor
+// Initial
+//
+//
+//
+
+// synopsys translate_off
+`include "timescale.v"
+// synopsys translate_on
+
+
+module can_register_syn
+( data_in,
+ data_out,
+ we,
+ clk,
+ rst_sync
+);
+
+parameter WIDTH = 8; // default parameter of the register width
+parameter RESET_VALUE = 0;
+
+input [WIDTH-1:0] data_in;
+input we;
+input clk;
+input rst_sync;
+
+output [WIDTH-1:0] data_out;
+reg [WIDTH-1:0] data_out;
+
+
+
+always @ (posedge clk)
+begin
+ if (rst_sync) // synchronous reset
+ data_out<=#1 RESET_VALUE;
+ else if (we) // write
+ data_out<=#1 data_in;
+end
+
+
+
+endmodule
tags/rel_22/rtl/verilog/can_register_syn.v
Property changes :
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property
Index: tags/rel_22/rtl/verilog/can_register_asyn.v
===================================================================
--- tags/rel_22/rtl/verilog/can_register_asyn.v (nonexistent)
+++ tags/rel_22/rtl/verilog/can_register_asyn.v (revision 146)
@@ -0,0 +1,108 @@
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// can_register_asyn.v ////
+//// ////
+//// ////
+//// This file is part of the CAN Protocol Controller ////
+//// http://www.opencores.org/projects/can/ ////
+//// ////
+//// ////
+//// Author(s): ////
+//// Igor Mohor ////
+//// igorm@opencores.org ////
+//// ////
+//// ////
+//// All additional information is available in the README.txt ////
+//// file. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// Copyright (C) 2002, 2003, 2004 Authors ////
+//// ////
+//// This source file may be used and distributed without ////
+//// restriction provided that this copyright statement is not ////
+//// removed from the file and that any derivative work contains ////
+//// the original copyright notice and the associated disclaimer. ////
+//// ////
+//// This source file is free software; you can redistribute it ////
+//// and/or modify it under the terms of the GNU Lesser General ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any ////
+//// later version. ////
+//// ////
+//// This source is distributed in the hope that it will be ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
+//// PURPOSE. See the GNU Lesser General Public License for more ////
+//// details. ////
+//// ////
+//// You should have received a copy of the GNU Lesser General ////
+//// Public License along with this source; if not, download it ////
+//// from http://www.opencores.org/lgpl.shtml ////
+//// ////
+//// The CAN protocol is developed by Robert Bosch GmbH and ////
+//// protected by patents. Anybody who wants to implement this ////
+//// CAN IP core on silicon has to obtain a CAN protocol license ////
+//// from Bosch. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//
+// CVS Revision History
+//
+// $Log: not supported by cvs2svn $
+// Revision 1.6 2003/03/20 16:58:50 mohor
+// unix.
+//
+// Revision 1.4 2003/03/11 16:32:34 mohor
+// timescale.v is used for simulation only.
+//
+// Revision 1.3 2003/02/09 02:24:33 mohor
+// Bosch license warning added. Error counters finished. Overload frames
+// still need to be fixed.
+//
+// Revision 1.2 2002/12/27 00:12:52 mohor
+// Header changed, testbench improved to send a frame (crc still missing).
+//
+// Revision 1.1.1.1 2002/12/20 16:39:21 mohor
+// Initial
+//
+//
+//
+
+// synopsys translate_off
+`include "timescale.v"
+// synopsys translate_on
+
+
+module can_register_asyn
+( data_in,
+ data_out,
+ we,
+ clk,
+ rst
+);
+
+parameter WIDTH = 8; // default parameter of the register width
+parameter RESET_VALUE = 0;
+
+input [WIDTH-1:0] data_in;
+input we;
+input clk;
+input rst;
+
+output [WIDTH-1:0] data_out;
+reg [WIDTH-1:0] data_out;
+
+
+
+always @ (posedge clk or posedge rst)
+begin
+ if (rst) // asynchronous reset
+ data_out<=#1 RESET_VALUE;
+ else if (we) // write
+ data_out<=#1 data_in;
+end
+
+
+
+endmodule
tags/rel_22/rtl/verilog/can_register_asyn.v
Property changes :
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property
Index: tags/rel_22/rtl/verilog/can_fifo.v
===================================================================
--- tags/rel_22/rtl/verilog/can_fifo.v (nonexistent)
+++ tags/rel_22/rtl/verilog/can_fifo.v (revision 146)
@@ -0,0 +1,714 @@
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// can_fifo.v ////
+//// ////
+//// ////
+//// This file is part of the CAN Protocol Controller ////
+//// http://www.opencores.org/projects/can/ ////
+//// ////
+//// ////
+//// Author(s): ////
+//// Igor Mohor ////
+//// igorm@opencores.org ////
+//// ////
+//// ////
+//// All additional information is available in the README.txt ////
+//// file. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// Copyright (C) 2002, 2003, 2004 Authors ////
+//// ////
+//// This source file may be used and distributed without ////
+//// restriction provided that this copyright statement is not ////
+//// removed from the file and that any derivative work contains ////
+//// the original copyright notice and the associated disclaimer. ////
+//// ////
+//// This source file is free software; you can redistribute it ////
+//// and/or modify it under the terms of the GNU Lesser General ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any ////
+//// later version. ////
+//// ////
+//// This source is distributed in the hope that it will be ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
+//// PURPOSE. See the GNU Lesser General Public License for more ////
+//// details. ////
+//// ////
+//// You should have received a copy of the GNU Lesser General ////
+//// Public License along with this source; if not, download it ////
+//// from http://www.opencores.org/lgpl.shtml ////
+//// ////
+//// The CAN protocol is developed by Robert Bosch GmbH and ////
+//// protected by patents. Anybody who wants to implement this ////
+//// CAN IP core on silicon has to obtain a CAN protocol license ////
+//// from Bosch. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//
+// CVS Revision History
+//
+// $Log: not supported by cvs2svn $
+// Revision 1.25 2003/10/23 16:52:17 mohor
+// Active high/low problem when Altera devices are used. Bug fixed by
+// Rojhalat Ibrahim.
+//
+// Revision 1.24 2003/10/17 05:55:20 markom
+// mbist signals updated according to newest convention
+//
+// Revision 1.23 2003/09/05 12:46:41 mohor
+// ALTERA_RAM supported.
+//
+// Revision 1.22 2003/08/20 09:59:16 mohor
+// Artisan RAM fixed (when not using BIST).
+//
+// Revision 1.21 2003/08/14 16:04:52 simons
+// Artisan ram instances added.
+//
+// Revision 1.20 2003/07/16 14:00:45 mohor
+// Fixed according to the linter.
+//
+// Revision 1.19 2003/07/03 09:30:44 mohor
+// PCI_BIST replaced with CAN_BIST.
+//
+// Revision 1.18 2003/06/27 22:14:23 simons
+// Overrun fifo implemented with FFs, because it is not possible to create such a memory.
+//
+// Revision 1.17 2003/06/27 20:56:15 simons
+// Virtual silicon ram instances added.
+//
+// Revision 1.16 2003/06/18 23:03:44 mohor
+// Typo fixed.
+//
+// Revision 1.15 2003/06/11 09:37:05 mohor
+// overrun and length_info fifos are initialized at the end of reset.
+//
+// Revision 1.14 2003/03/05 15:02:30 mohor
+// Xilinx RAM added.
+//
+// Revision 1.13 2003/03/01 22:53:33 mohor
+// Actel APA ram supported.
+//
+// Revision 1.12 2003/02/19 14:44:03 mohor
+// CAN core finished. Host interface added. Registers finished.
+// Synchronization to the wishbone finished.
+//
+// Revision 1.11 2003/02/14 20:17:01 mohor
+// Several registers added. Not finished, yet.
+//
+// Revision 1.10 2003/02/11 00:56:06 mohor
+// Wishbone interface added.
+//
+// Revision 1.9 2003/02/09 02:24:33 mohor
+// Bosch license warning added. Error counters finished. Overload frames
+// still need to be fixed.
+//
+// Revision 1.8 2003/01/31 01:13:38 mohor
+// backup.
+//
+// Revision 1.7 2003/01/17 17:44:31 mohor
+// Fifo corrected to be synthesizable.
+//
+// Revision 1.6 2003/01/15 13:16:47 mohor
+// When a frame with "remote request" is received, no data is stored
+// to fifo, just the frame information (identifier, ...). Data length
+// that is stored is the received data length and not the actual data
+// length that is stored to fifo.
+//
+// Revision 1.5 2003/01/14 17:25:09 mohor
+// Addresses corrected to decimal values (previously hex).
+//
+// Revision 1.4 2003/01/14 12:19:35 mohor
+// rx_fifo is now working.
+//
+// Revision 1.3 2003/01/09 21:54:45 mohor
+// rx fifo added. Not 100 % verified, yet.
+//
+// Revision 1.2 2003/01/09 14:46:58 mohor
+// Temporary files (backup).
+//
+// Revision 1.1 2003/01/08 02:10:55 mohor
+// Acceptance filter added.
+//
+//
+//
+//
+
+// synopsys translate_off
+`include "timescale.v"
+// synopsys translate_on
+`include "can_defines.v"
+
+module can_fifo
+(
+ clk,
+ rst,
+
+ wr,
+
+ data_in,
+ addr,
+ data_out,
+ fifo_selected,
+
+ reset_mode,
+ release_buffer,
+ extended_mode,
+ overrun,
+ info_empty,
+ info_cnt
+
+`ifdef CAN_BIST
+ ,
+ mbist_si_i,
+ mbist_so_o,
+ mbist_ctrl_i
+`endif
+);
+
+parameter Tp = 1;
+
+input clk;
+input rst;
+input wr;
+input [7:0] data_in;
+input [5:0] addr;
+input reset_mode;
+input release_buffer;
+input extended_mode;
+input fifo_selected;
+
+output [7:0] data_out;
+output overrun;
+output info_empty;
+output [6:0] info_cnt;
+
+`ifdef CAN_BIST
+input mbist_si_i;
+output mbist_so_o;
+input [`CAN_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i; // bist chain shift control
+wire mbist_s_0;
+`endif
+
+`ifdef ALTERA_RAM
+`else
+`ifdef ACTEL_APA_RAM
+`else
+`ifdef XILINX_RAM
+`else
+`ifdef ARTISAN_RAM
+ reg overrun_info[0:63];
+`else
+`ifdef VIRTUALSILICON_RAM
+ reg overrun_info[0:63];
+`else
+ reg [7:0] fifo [0:63];
+ reg [3:0] length_fifo[0:63];
+ reg overrun_info[0:63];
+`endif
+`endif
+`endif
+`endif
+`endif
+
+reg [5:0] rd_pointer;
+reg [5:0] wr_pointer;
+reg [5:0] read_address;
+reg [5:0] wr_info_pointer;
+reg [5:0] rd_info_pointer;
+reg wr_q;
+reg [3:0] len_cnt;
+reg [6:0] fifo_cnt;
+reg [6:0] info_cnt;
+reg latch_overrun;
+reg initialize_memories;
+
+wire [3:0] length_info;
+wire write_length_info;
+wire fifo_empty;
+wire fifo_full;
+wire info_full;
+
+assign write_length_info = (~wr) & wr_q;
+
+// Delayed write signal
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ wr_q <=#Tp 1'b0;
+ else if (reset_mode)
+ wr_q <=#Tp 1'b0;
+ else
+ wr_q <=#Tp wr;
+end
+
+
+// length counter
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ len_cnt <= 4'h0;
+ else if (reset_mode | write_length_info)
+ len_cnt <=#Tp 4'h0;
+ else if (wr & (~fifo_full))
+ len_cnt <=#Tp len_cnt + 1'b1;
+end
+
+
+// wr_info_pointer
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ wr_info_pointer <= 6'h0;
+ else if (write_length_info & (~info_full) | initialize_memories)
+ wr_info_pointer <=#Tp wr_info_pointer + 1'b1;
+ else if (reset_mode)
+ wr_info_pointer <=#Tp 6'h0;
+end
+
+
+
+// rd_info_pointer
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ rd_info_pointer <= 6'h0;
+ else if (reset_mode)
+ rd_info_pointer <=#Tp 6'h0;
+ else if (release_buffer & (~fifo_empty))
+ rd_info_pointer <=#Tp rd_info_pointer + 1'b1;
+end
+
+
+// rd_pointer
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ rd_pointer <= 5'h0;
+ else if (release_buffer & (~fifo_empty))
+ rd_pointer <=#Tp rd_pointer + {2'h0, length_info};
+ else if (reset_mode)
+ rd_pointer <=#Tp 5'h0;
+end
+
+
+// wr_pointer
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ wr_pointer <= 5'h0;
+ else if (wr & (~fifo_full))
+ wr_pointer <=#Tp wr_pointer + 1'b1;
+ else if (reset_mode)
+ wr_pointer <=#Tp 5'h0;
+end
+
+
+// latch_overrun
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ latch_overrun <= 1'b0;
+ else if (reset_mode | write_length_info)
+ latch_overrun <=#Tp 1'b0;
+ else if (wr & fifo_full)
+ latch_overrun <=#Tp 1'b1;
+end
+
+
+// Counting data in fifo
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ fifo_cnt <= 7'h0;
+ else if (wr & (~release_buffer) & (~fifo_full))
+ fifo_cnt <=#Tp fifo_cnt + 1'b1;
+ else if ((~wr) & release_buffer & (~fifo_empty))
+ fifo_cnt <=#Tp fifo_cnt - {3'h0, length_info};
+ else if (wr & release_buffer & (~fifo_full) & (~fifo_empty))
+ fifo_cnt <=#Tp fifo_cnt - {3'h0, length_info} + 1'b1;
+ else if (reset_mode)
+ fifo_cnt <=#Tp 7'h0;
+end
+
+assign fifo_full = fifo_cnt == 7'd64;
+assign fifo_empty = fifo_cnt == 7'd0;
+
+
+// Counting data in length_fifo and overrun_info fifo
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ info_cnt <=#Tp 7'h0;
+ else if (reset_mode)
+ info_cnt <=#Tp 7'h0;
+ else if (write_length_info ^ release_buffer)
+ begin
+ if (release_buffer & (~info_empty))
+ info_cnt <=#Tp info_cnt - 1'b1;
+ else if (write_length_info & (~info_full))
+ info_cnt <=#Tp info_cnt + 1'b1;
+ end
+end
+
+assign info_full = info_cnt == 7'd64;
+assign info_empty = info_cnt == 7'd0;
+
+
+// Selecting which address will be used for reading data from rx fifo
+always @ (extended_mode or rd_pointer or addr)
+begin
+ if (extended_mode) // extended mode
+ read_address = rd_pointer + (addr - 6'd16);
+ else // normal mode
+ read_address = rd_pointer + (addr - 6'd20);
+end
+
+
+always @ (posedge clk or posedge rst)
+begin
+ if (rst)
+ initialize_memories <= 1'b1;
+ else if (&wr_info_pointer)
+ initialize_memories <=#Tp 1'b0;
+end
+
+
+`ifdef ALTERA_RAM
+// altera_ram_64x8_sync fifo
+ lpm_ram_dp fifo
+ (
+ .q (data_out),
+ .rdclock (clk),
+ .wrclock (clk),
+ .data (data_in),
+ .wren (wr & (~fifo_full)),
+ .rden (fifo_selected),
+ .wraddress (wr_pointer),
+ .rdaddress (read_address)
+ );
+ defparam fifo.lpm_width = 8;
+ defparam fifo.lpm_widthad = 6;
+ defparam fifo.lpm_numwords = 64;
+
+
+// altera_ram_64x4_sync info_fifo
+ lpm_ram_dp info_fifo
+ (
+ .q (length_info),
+ .rdclock (clk),
+ .wrclock (clk),
+ .data (len_cnt & {4{~initialize_memories}}),
+ .wren (write_length_info & (~info_full) | initialize_memories),
+ .wraddress (wr_info_pointer),
+ .rdaddress (rd_info_pointer)
+ );
+ defparam info_fifo.lpm_width = 4;
+ defparam info_fifo.lpm_widthad = 6;
+ defparam info_fifo.lpm_numwords = 64;
+
+
+// altera_ram_64x1_sync overrun_fifo
+ lpm_ram_dp overrun_fifo
+ (
+ .q (overrun),
+ .rdclock (clk),
+ .wrclock (clk),
+ .data ((latch_overrun | (wr & fifo_full)) & (~initialize_memories)),
+ .wren (write_length_info & (~info_full) | initialize_memories),
+ .wraddress (wr_info_pointer),
+ .rdaddress (rd_info_pointer)
+ );
+ defparam overrun_fifo.lpm_width = 1;
+ defparam overrun_fifo.lpm_widthad = 6;
+ defparam overrun_fifo.lpm_numwords = 64;
+
+`else
+`ifdef ACTEL_APA_RAM
+ actel_ram_64x8_sync fifo
+ (
+ .DO (data_out),
+ .RCLOCK (clk),
+ .WCLOCK (clk),
+ .DI (data_in),
+ .PO (), // parity not used
+ .WRB (~(wr & (~fifo_full))),
+ .RDB (~fifo_selected),
+ .WADDR (wr_pointer),
+ .RADDR (read_address)
+ );
+
+
+ actel_ram_64x4_sync info_fifo
+ (
+ .DO (length_info),
+ .RCLOCK (clk),
+ .WCLOCK (clk),
+ .DI (len_cnt & {4{~initialize_memories}}),
+ .PO (), // parity not used
+ .WRB (~(write_length_info & (~info_full) | initialize_memories)),
+ .RDB (1'b0), // always enabled
+ .WADDR (wr_info_pointer),
+ .RADDR (rd_info_pointer)
+ );
+
+
+ actel_ram_64x1_sync overrun_fifo
+ (
+ .DO (overrun),
+ .RCLOCK (clk),
+ .WCLOCK (clk),
+ .DI ((latch_overrun | (wr & fifo_full)) & (~initialize_memories)),
+ .PO (), // parity not used
+ .WRB (~(write_length_info & (~info_full) | initialize_memories)),
+ .RDB (1'b0), // always enabled
+ .WADDR (wr_info_pointer),
+ .RADDR (rd_info_pointer)
+ );
+`else
+`ifdef XILINX_RAM
+
+ RAMB4_S8_S8 fifo
+ (
+ .DOA(),
+ .DOB(data_out),
+ .ADDRA({3'h0, wr_pointer}),
+ .CLKA(clk),
+ .DIA(data_in),
+ .ENA(1'b1),
+ .RSTA(1'b0),
+ .WEA(wr & (~fifo_full)),
+ .ADDRB({3'h0, read_address}),
+ .CLKB(clk),
+ .DIB(8'h0),
+ .ENB(1'b1),
+ .RSTB(1'b0),
+ .WEB(1'b0)
+ );
+
+
+ RAMB4_S4_S4 info_fifo
+ (
+ .DOA(),
+ .DOB(length_info),
+ .ADDRA({4'h0, wr_info_pointer}),
+ .CLKA(clk),
+ .DIA(len_cnt & {4{~initialize_memories}}),
+ .ENA(1'b1),
+ .RSTA(1'b0),
+ .WEA(write_length_info & (~info_full) | initialize_memories),
+ .ADDRB({4'h0, rd_info_pointer}),
+ .CLKB(clk),
+ .DIB(4'h0),
+ .ENB(1'b1),
+ .RSTB(1'b0),
+ .WEB(1'b0)
+ );
+
+
+ RAMB4_S1_S1 overrun_fifo
+ (
+ .DOA(),
+ .DOB(overrun),
+ .ADDRA({6'h0, wr_info_pointer}),
+ .CLKA(clk),
+ .DIA((latch_overrun | (wr & fifo_full)) & (~initialize_memories)),
+ .ENA(1'b1),
+ .RSTA(1'b0),
+ .WEA(write_length_info & (~info_full) | initialize_memories),
+ .ADDRB({6'h0, rd_info_pointer}),
+ .CLKB(clk),
+ .DIB(1'h0),
+ .ENB(1'b1),
+ .RSTB(1'b0),
+ .WEB(1'b0)
+ );
+
+
+`else
+`ifdef VIRTUALSILICON_RAM
+
+`ifdef CAN_BIST
+ vs_hdtp_64x8_bist fifo
+`else
+ vs_hdtp_64x8 fifo
+`endif
+ (
+ .RCK (clk),
+ .WCK (clk),
+ .RADR (read_address),
+ .WADR (wr_pointer),
+ .DI (data_in),
+ .DOUT (data_out),
+ .REN (~fifo_selected),
+ .WEN (~(wr & (~fifo_full)))
+ `ifdef CAN_BIST
+ ,
+ // debug chain signals
+ .mbist_si_i (mbist_si_i),
+ .mbist_so_o (mbist_s_0),
+ .mbist_ctrl_i (mbist_ctrl_i)
+ `endif
+ );
+
+`ifdef CAN_BIST
+ vs_hdtp_64x4_bist info_fifo
+`else
+ vs_hdtp_64x4 info_fifo
+`endif
+ (
+ .RCK (clk),
+ .WCK (clk),
+ .RADR (rd_info_pointer),
+ .WADR (wr_info_pointer),
+ .DI (len_cnt & {4{~initialize_memories}}),
+ .DOUT (length_info),
+ .REN (1'b0),
+ .WEN (~(write_length_info & (~info_full) | initialize_memories))
+ `ifdef CAN_BIST
+ ,
+ // debug chain signals
+ .mbist_si_i (mbist_s_0),
+ .mbist_so_o (mbist_so_o),
+ .mbist_ctrl_i (mbist_ctrl_i)
+ `endif
+ );
+
+ // overrun_info
+ always @ (posedge clk)
+ begin
+ if (write_length_info & (~info_full) | initialize_memories)
+ overrun_info[wr_info_pointer] <=#Tp (latch_overrun | (wr & fifo_full)) & (~initialize_memories);
+ end
+
+
+ // reading overrun
+ assign overrun = overrun_info[rd_info_pointer];
+
+`else
+`ifdef ARTISAN_RAM
+
+`ifdef CAN_BIST
+ art_hstp_64x8_bist fifo
+ (
+ .CLKR (clk),
+ .CLKW (clk),
+ .AR (read_address),
+ .AW (wr_pointer),
+ .D (data_in),
+ .Q (data_out),
+ .REN (~fifo_selected),
+ .WEN (~(wr & (~fifo_full))),
+ .mbist_si_i (mbist_si_i),
+ .mbist_so_o (mbist_s_0),
+ .mbist_ctrl_i (mbist_ctrl_i)
+ );
+ art_hstp_64x4_bist info_fifo
+ (
+ .CLKR (clk),
+ .CLKW (clk),
+ .AR (rd_info_pointer),
+ .AW (wr_info_pointer),
+ .D (len_cnt & {4{~initialize_memories}}),
+ .Q (length_info),
+ .REN (1'b0),
+ .WEN (~(write_length_info & (~info_full) | initialize_memories)),
+ .mbist_si_i (mbist_s_0),
+ .mbist_so_o (mbist_so_o),
+ .mbist_ctrl_i (mbist_ctrl_i)
+ );
+`else
+ art_hsdp_64x8 fifo
+ (
+ .CENA (1'b0),
+ .CENB (1'b0),
+ .CLKA (clk),
+ .CLKB (clk),
+ .AA (read_address),
+ .AB (wr_pointer),
+ .DA (8'h00),
+ .DB (data_in),
+ .QA (data_out),
+ .QB (),
+ .OENA (~fifo_selected),
+ .OENB (1'b1),
+ .WENA (1'b1),
+ .WENB (~(wr & (~fifo_full)))
+ );
+ art_hsdp_64x4 info_fifo
+ (
+ .CENA (1'b0),
+ .CENB (1'b0),
+ .CLKA (clk),
+ .CLKB (clk),
+ .AA (rd_info_pointer),
+ .AB (wr_info_pointer),
+ .DA (4'h0),
+ .DB (len_cnt & {4{~initialize_memories}}),
+ .QA (length_info),
+ .QB (),
+ .OENA (1'b0),
+ .OENB (1'b1),
+ .WENA (1'b1),
+ .WENB (~(write_length_info & (~info_full) | initialize_memories))
+ );
+`endif
+
+ // overrun_info
+ always @ (posedge clk)
+ begin
+ if (write_length_info & (~info_full) | initialize_memories)
+ overrun_info[wr_info_pointer] <=#Tp (latch_overrun | (wr & fifo_full)) & (~initialize_memories);
+ end
+
+
+ // reading overrun
+ assign overrun = overrun_info[rd_info_pointer];
+
+`else
+ // writing data to fifo
+ always @ (posedge clk)
+ begin
+ if (wr & (~fifo_full))
+ fifo[wr_pointer] <=#Tp data_in;
+ end
+
+ // reading from fifo
+ assign data_out = fifo[read_address];
+
+
+ // writing length_fifo
+ always @ (posedge clk)
+ begin
+ if (write_length_info & (~info_full) | initialize_memories)
+ length_fifo[wr_info_pointer] <=#Tp len_cnt & {4{~initialize_memories}};
+ end
+
+
+ // reading length_fifo
+ assign length_info = length_fifo[rd_info_pointer];
+
+ // overrun_info
+ always @ (posedge clk)
+ begin
+ if (write_length_info & (~info_full) | initialize_memories)
+ overrun_info[wr_info_pointer] <=#Tp (latch_overrun | (wr & fifo_full)) & (~initialize_memories);
+ end
+
+
+ // reading overrun
+ assign overrun = overrun_info[rd_info_pointer];
+
+
+`endif
+`endif
+`endif
+`endif
+`endif
+
+
+
+
+
+endmodule
Index: tags/rel_22/rtl/verilog/can_register.v
===================================================================
--- tags/rel_22/rtl/verilog/can_register.v (nonexistent)
+++ tags/rel_22/rtl/verilog/can_register.v (revision 146)
@@ -0,0 +1,103 @@
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// can_register.v ////
+//// ////
+//// ////
+//// This file is part of the CAN Protocol Controller ////
+//// http://www.opencores.org/projects/can/ ////
+//// ////
+//// ////
+//// Author(s): ////
+//// Igor Mohor ////
+//// igorm@opencores.org ////
+//// ////
+//// ////
+//// All additional information is available in the README.txt ////
+//// file. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// Copyright (C) 2002, 2003, 2004 Authors ////
+//// ////
+//// This source file may be used and distributed without ////
+//// restriction provided that this copyright statement is not ////
+//// removed from the file and that any derivative work contains ////
+//// the original copyright notice and the associated disclaimer. ////
+//// ////
+//// This source file is free software; you can redistribute it ////
+//// and/or modify it under the terms of the GNU Lesser General ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any ////
+//// later version. ////
+//// ////
+//// This source is distributed in the hope that it will be ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
+//// PURPOSE. See the GNU Lesser General Public License for more ////
+//// details. ////
+//// ////
+//// You should have received a copy of the GNU Lesser General ////
+//// Public License along with this source; if not, download it ////
+//// from http://www.opencores.org/lgpl.shtml ////
+//// ////
+//// The CAN protocol is developed by Robert Bosch GmbH and ////
+//// protected by patents. Anybody who wants to implement this ////
+//// CAN IP core on silicon has to obtain a CAN protocol license ////
+//// from Bosch. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//
+// CVS Revision History
+//
+// $Log: not supported by cvs2svn $
+// Revision 1.6 2003/03/20 16:58:50 mohor
+// unix.
+//
+// Revision 1.4 2003/03/11 16:32:34 mohor
+// timescale.v is used for simulation only.
+//
+// Revision 1.3 2003/02/09 02:24:33 mohor
+// Bosch license warning added. Error counters finished. Overload frames
+// still need to be fixed.
+//
+// Revision 1.2 2002/12/27 00:12:52 mohor
+// Header changed, testbench improved to send a frame (crc still missing).
+//
+// Revision 1.1.1.1 2002/12/20 16:39:21 mohor
+// Initial
+//
+//
+//
+
+// synopsys translate_off
+`include "timescale.v"
+// synopsys translate_on
+
+
+module can_register
+( data_in,
+ data_out,
+ we,
+ clk
+);
+
+parameter WIDTH = 8; // default parameter of the register width
+
+input [WIDTH-1:0] data_in;
+input we;
+input clk;
+
+output [WIDTH-1:0] data_out;
+reg [WIDTH-1:0] data_out;
+
+
+
+always @ (posedge clk)
+begin
+ if (we) // write
+ data_out<=#1 data_in;
+end
+
+
+
+endmodule
tags/rel_22/rtl/verilog/can_register.v
Property changes :
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property
Index: tags/rel_22/rtl/verilog/can_crc.v
===================================================================
--- tags/rel_22/rtl/verilog/can_crc.v (nonexistent)
+++ tags/rel_22/rtl/verilog/can_crc.v (revision 146)
@@ -0,0 +1,110 @@
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// can_crc.v ////
+//// ////
+//// ////
+//// This file is part of the CAN Protocol Controller ////
+//// http://www.opencores.org/projects/can/ ////
+//// ////
+//// ////
+//// Author(s): ////
+//// Igor Mohor ////
+//// igorm@opencores.org ////
+//// ////
+//// ////
+//// All additional information is available in the README.txt ////
+//// file. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// Copyright (C) 2002, 2003, 2004 Authors ////
+//// ////
+//// This source file may be used and distributed without ////
+//// restriction provided that this copyright statement is not ////
+//// removed from the file and that any derivative work contains ////
+//// the original copyright notice and the associated disclaimer. ////
+//// ////
+//// This source file is free software; you can redistribute it ////
+//// and/or modify it under the terms of the GNU Lesser General ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any ////
+//// later version. ////
+//// ////
+//// This source is distributed in the hope that it will be ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
+//// PURPOSE. See the GNU Lesser General Public License for more ////
+//// details. ////
+//// ////
+//// You should have received a copy of the GNU Lesser General ////
+//// Public License along with this source; if not, download it ////
+//// from http://www.opencores.org/lgpl.shtml ////
+//// ////
+//// The CAN protocol is developed by Robert Bosch GmbH and ////
+//// protected by patents. Anybody who wants to implement this ////
+//// CAN IP core on silicon has to obtain a CAN protocol license ////
+//// from Bosch. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//
+// CVS Revision History
+//
+// $Log: not supported by cvs2svn $
+// Revision 1.4 2003/07/16 13:16:51 mohor
+// Fixed according to the linter.
+//
+// Revision 1.3 2003/02/10 16:02:11 mohor
+// CAN is working according to the specification. WB interface and more
+// registers (status, IRQ, ...) needs to be added.
+//
+// Revision 1.2 2003/02/09 02:24:33 mohor
+// Bosch license warning added. Error counters finished. Overload frames
+// still need to be fixed.
+//
+// Revision 1.1 2003/01/08 02:10:54 mohor
+// Acceptance filter added.
+//
+//
+//
+//
+
+// synopsys translate_off
+`include "timescale.v"
+// synopsys translate_on
+
+module can_crc (clk, data, enable, initialize, crc);
+
+
+parameter Tp = 1;
+
+input clk;
+input data;
+input enable;
+input initialize;
+
+output [14:0] crc;
+
+reg [14:0] crc;
+
+wire crc_next;
+wire [14:0] crc_tmp;
+
+
+assign crc_next = data ^ crc[14];
+assign crc_tmp = {crc[13:0], 1'b0};
+
+always @ (posedge clk)
+begin
+ if(initialize)
+ crc <= #Tp 15'h0;
+ else if (enable)
+ begin
+ if (crc_next)
+ crc <= #Tp crc_tmp ^ 15'h4599;
+ else
+ crc <= #Tp crc_tmp;
+ end
+end
+
+
+endmodule
Index: tags/rel_22/rtl/verilog/can_register_asyn_syn.v
===================================================================
--- tags/rel_22/rtl/verilog/can_register_asyn_syn.v (nonexistent)
+++ tags/rel_22/rtl/verilog/can_register_asyn_syn.v (revision 146)
@@ -0,0 +1,112 @@
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// can_register_asyn_syn.v ////
+//// ////
+//// ////
+//// This file is part of the CAN Protocol Controller ////
+//// http://www.opencores.org/projects/can/ ////
+//// ////
+//// ////
+//// Author(s): ////
+//// Igor Mohor ////
+//// igorm@opencores.org ////
+//// ////
+//// ////
+//// All additional information is available in the README.txt ////
+//// file. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// Copyright (C) 2002, 2003, 2004 Authors ////
+//// ////
+//// This source file may be used and distributed without ////
+//// restriction provided that this copyright statement is not ////
+//// removed from the file and that any derivative work contains ////
+//// the original copyright notice and the associated disclaimer. ////
+//// ////
+//// This source file is free software; you can redistribute it ////
+//// and/or modify it under the terms of the GNU Lesser General ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any ////
+//// later version. ////
+//// ////
+//// This source is distributed in the hope that it will be ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
+//// PURPOSE. See the GNU Lesser General Public License for more ////
+//// details. ////
+//// ////
+//// You should have received a copy of the GNU Lesser General ////
+//// Public License along with this source; if not, download it ////
+//// from http://www.opencores.org/lgpl.shtml ////
+//// ////
+//// The CAN protocol is developed by Robert Bosch GmbH and ////
+//// protected by patents. Anybody who wants to implement this ////
+//// CAN IP core on silicon has to obtain a CAN protocol license ////
+//// from Bosch. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//
+// CVS Revision History
+//
+// $Log: not supported by cvs2svn $
+// Revision 1.6 2003/03/20 16:52:43 mohor
+// unix.
+//
+// Revision 1.4 2003/03/11 16:32:34 mohor
+// timescale.v is used for simulation only.
+//
+// Revision 1.3 2003/02/09 02:24:33 mohor
+// Bosch license warning added. Error counters finished. Overload frames
+// still need to be fixed.
+//
+// Revision 1.2 2002/12/27 00:12:52 mohor
+// Header changed, testbench improved to send a frame (crc still missing).
+//
+// Revision 1.1.1.1 2002/12/20 16:39:21 mohor
+// Initial
+//
+//
+//
+
+// synopsys translate_off
+`include "timescale.v"
+// synopsys translate_on
+
+
+module can_register_asyn_syn
+( data_in,
+ data_out,
+ we,
+ clk,
+ rst,
+ rst_sync
+);
+
+parameter WIDTH = 8; // default parameter of the register width
+parameter RESET_VALUE = 0;
+
+input [WIDTH-1:0] data_in;
+input we;
+input clk;
+input rst;
+input rst_sync;
+
+output [WIDTH-1:0] data_out;
+reg [WIDTH-1:0] data_out;
+
+
+
+always @ (posedge clk or posedge rst)
+begin
+ if(rst)
+ data_out<=#1 RESET_VALUE;
+ else if (rst_sync) // synchronous reset
+ data_out<=#1 RESET_VALUE;
+ else if (we) // write
+ data_out<=#1 data_in;
+end
+
+
+
+endmodule
tags/rel_22/rtl/verilog/can_register_asyn_syn.v
Property changes :
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property
Index: tags/rel_22/rtl/verilog/can_ibo.v
===================================================================
--- tags/rel_22/rtl/verilog/can_ibo.v (nonexistent)
+++ tags/rel_22/rtl/verilog/can_ibo.v (revision 146)
@@ -0,0 +1,84 @@
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// can_ibo.v ////
+//// ////
+//// ////
+//// This file is part of the CAN Protocol Controller ////
+//// http://www.opencores.org/projects/can/ ////
+//// ////
+//// ////
+//// Author(s): ////
+//// Igor Mohor ////
+//// igorm@opencores.org ////
+//// ////
+//// ////
+//// All additional information is available in the README.txt ////
+//// file. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// Copyright (C) 2002, 2003, 2004 Authors ////
+//// ////
+//// This source file may be used and distributed without ////
+//// restriction provided that this copyright statement is not ////
+//// removed from the file and that any derivative work contains ////
+//// the original copyright notice and the associated disclaimer. ////
+//// ////
+//// This source file is free software; you can redistribute it ////
+//// and/or modify it under the terms of the GNU Lesser General ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any ////
+//// later version. ////
+//// ////
+//// This source is distributed in the hope that it will be ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
+//// PURPOSE. See the GNU Lesser General Public License for more ////
+//// details. ////
+//// ////
+//// You should have received a copy of the GNU Lesser General ////
+//// Public License along with this source; if not, download it ////
+//// from http://www.opencores.org/lgpl.shtml ////
+//// ////
+//// The CAN protocol is developed by Robert Bosch GmbH and ////
+//// protected by patents. Anybody who wants to implement this ////
+//// CAN IP core on silicon has to obtain a CAN protocol license ////
+//// from Bosch. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//
+// CVS Revision History
+//
+// $Log: not supported by cvs2svn $
+// Revision 1.2 2003/02/09 02:24:33 mohor
+// Bosch license warning added. Error counters finished. Overload frames
+// still need to be fixed.
+//
+// Revision 1.1 2003/02/04 14:34:52 mohor
+// *** empty log message ***
+//
+//
+//
+//
+
+
+// This module only inverts bit order
+module can_ibo
+(
+ di,
+ do
+);
+
+input [7:0] di;
+output [7:0] do;
+
+assign do[0] = di[7];
+assign do[1] = di[6];
+assign do[2] = di[5];
+assign do[3] = di[4];
+assign do[4] = di[3];
+assign do[5] = di[2];
+assign do[6] = di[1];
+assign do[7] = di[0];
+
+endmodule
Index: tags/rel_22/sim/rtl_sim/run/run_sim.scr
===================================================================
--- tags/rel_22/sim/rtl_sim/run/run_sim.scr (nonexistent)
+++ tags/rel_22/sim/rtl_sim/run/run_sim.scr (revision 146)
@@ -0,0 +1,81 @@
+#!/bin/csh -f
+
+if ( $# < 1 ) then
+ echo "First argument must be a top level module name!"
+ exit
+else
+ set SIM_TOP = $1
+endif
+
+set current_par = 1
+set output_waveform = 0
+while ( $current_par < $# )
+ @ current_par = $current_par + 1
+ case wave:
+ @ output_waveform = 1
+ breaksw
+ default:
+ echo 'Unknown option "'$argv[$current_par]'"!'
+ exit
+ breaksw
+ endsw
+end
+
+echo "-CDSLIB ../bin/cds.lib" > ncvlog.args
+echo "-HDLVAR ../bin/hdl.var" >> ncvlog.args
+echo "-MESSAGES" >> ncvlog.args
+echo "-INCDIR ../../../bench/verilog" >> ncvlog.args
+echo "-INCDIR ../../../rtl/verilog" >> ncvlog.args
+echo "-NOCOPYRIGHT" >> ncvlog.args
+echo "-LOGFILE ../log/ncvlog.log" >> ncvlog.args
+
+foreach filename ( `cat ../bin/rtl_file_list` )
+ echo "../../../rtl/verilog/"$filename >> ncvlog.args
+end
+
+#foreach filename ( `cat ../bin/memory_file_list` )
+# echo "../../../bench/verilog/"$filename >> ncvlog.args
+#end
+
+foreach filename ( `cat ../bin/sim_file_list` )
+ echo "../../../bench/verilog/"$filename >> ncvlog.args
+end
+
+#echo "../../../../bist/rtl/verilog/bist.v" >> ncvlog.args
+#echo "../../../../bist/rtl/verilog/bist_dp_top.v" >> ncvlog.args
+#echo "../../../../bist/rtl/verilog/bist_sp_top.v" >> ncvlog.args
+#echo "../../../../bist/rtl/verilog/bist_tp_top.v" >> ncvlog.args
+
+ncvlog -f ncvlog.args
+
+echo "-MESSAGES" > ncelab.args
+echo "-NOCOPYRIGHT" >> ncelab.args
+echo "-CDSLIB ../bin/cds.lib" >> ncelab.args
+echo "-HDLVAR ../bin/hdl.var" >> ncelab.args
+echo "-LOGFILE ../log/ncelab.log" >> ncelab.args
+echo "-SNAPSHOT worklib.bench:rtl" >> ncelab.args
+echo "-NO_TCHK_MSG" >> ncelab.args
+echo "-ACCESS +RWC" >> ncelab.args
+echo worklib.$SIM_TOP >> ncelab.args
+
+ncelab -f ncelab.args
+
+echo "-MESSAGES" > ncsim.args
+echo "-NOCOPYRIGHT" >> ncsim.args
+echo "-CDSLIB ../bin/cds.lib" >> ncsim.args
+echo "-HDLVAR ../bin/hdl.var" >> ncsim.args
+echo "-INPUT ncsim.tcl" >> ncsim.args
+echo "-LOGFILE ../log/ncsim.log" >> ncsim.args
+echo "worklib.bench:rtl" >> ncsim.args
+
+if ( $output_waveform ) then
+ echo "database -open waves -shm -into ../out/waves.shm" > ./ncsim.tcl
+ echo "probe -create -database waves $SIM_TOP -shm -all -depth all" >> ./ncsim.tcl
+ echo "run" >> ./ncsim.tcl
+else
+ echo "run" > ./ncsim.tcl
+endif
+
+echo "quit" >> ncsim.tcl
+
+ncsim -LICQUEUE -f ./ncsim.args
tags/rel_22/sim/rtl_sim/run/run_sim.scr
Property changes :
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property
Index: tags/rel_22/sim/rtl_sim/run/wave.do
===================================================================
--- tags/rel_22/sim/rtl_sim/run/wave.do (nonexistent)
+++ tags/rel_22/sim/rtl_sim/run/wave.do (revision 146)
@@ -0,0 +1,510 @@
+// Signalscan Version 6.7p1
+
+
+define noactivityindicator
+define analog waveform lines
+define add variable default overlay off
+define waveform window analogheight 1
+define terminal automatic
+define buttons control \
+ 1 opensimmulationfile \
+ 2 executedofile \
+ 3 designbrowser \
+ 4 waveform \
+ 5 source \
+ 6 breakpoints \
+ 7 definesourcessearchpath \
+ 8 exit \
+ 9 createbreakpoint \
+ 10 creategroup \
+ 11 createmarker \
+ 12 closesimmulationfile \
+ 13 renamesimmulationfile \
+ 14 replacesimulationfiledata \
+ 15 listopensimmulationfiles \
+ 16 savedofile
+define buttons waveform \
+ 1 undo \
+ 2 cut \
+ 3 copy \
+ 4 paste \
+ 5 delete \
+ 6 zoomin \
+ 7 zoomout \
+ 8 zoomoutfull \
+ 9 expand \
+ 10 createmarker \
+ 11 designbrowser:1 \
+ 12 variableradixbinary \
+ 13 variableradixoctal \
+ 14 variableradixdecimal \
+ 15 variableradixhexadecimal \
+ 16 variableradixascii
+define buttons designbrowser \
+ 1 undo \
+ 2 cut \
+ 3 copy \
+ 4 paste \
+ 5 delete \
+ 6 cdupscope \
+ 7 getallvariables \
+ 8 getdeepallvariables \
+ 9 addvariables \
+ 10 addvarsandclosewindow \
+ 11 closewindow \
+ 12 scopefiltermodule \
+ 13 scopefiltertask \
+ 14 scopefilterfunction \
+ 15 scopefilterblock \
+ 16 scopefilterprimitive
+define buttons event \
+ 1 undo \
+ 2 cut \
+ 3 copy \
+ 4 paste \
+ 5 delete \
+ 6 move \
+ 7 closewindow \
+ 8 duplicate \
+ 9 defineasrisingedge \
+ 10 defineasfallingedge \
+ 11 defineasanyedge \
+ 12 variableradixbinary \
+ 13 variableradixoctal \
+ 14 variableradixdecimal \
+ 15 variableradixhexadecimal \
+ 16 variableradixascii
+define buttons source \
+ 1 undo \
+ 2 cut \
+ 3 copy \
+ 4 paste \
+ 5 delete \
+ 6 createbreakpoint \
+ 7 creategroup \
+ 8 createmarker \
+ 9 createevent \
+ 10 createregisterpage \
+ 11 closewindow \
+ 12 opensimmulationfile \
+ 13 closesimmulationfile \
+ 14 renamesimmulationfile \
+ 15 replacesimulationfiledata \
+ 16 listopensimmulationfiles
+define buttons register \
+ 1 undo \
+ 2 cut \
+ 3 copy \
+ 4 paste \
+ 5 delete \
+ 6 createregisterpage \
+ 7 closewindow \
+ 8 continuefor \
+ 9 continueuntil \
+ 10 continueforever \
+ 11 stop \
+ 12 previous \
+ 13 next \
+ 14 variableradixbinary \
+ 15 variableradixhexadecimal \
+ 16 variableradixascii
+define show related transactions
+define exit prompt
+define event search direction forward
+define variable nofullhierarchy
+define variable nofilenames
+define variable nofullpathfilenames
+include bookmark with filenames
+include scope history without filenames
+define waveform window listpane 7.94
+define waveform window namepane 11.94
+define multivalueindication
+define pattern curpos dot
+define pattern cursor1 dot
+define pattern cursor2 dot
+define pattern marker dot
+define print designer "Igor Mohor"
+define print border
+define print color blackonwhite
+define print command "/usr/ucb/lpr -P%P"
+define print printer lp
+define print range visible
+define print variable visible
+define rise fall time low threshold percentage 10
+define rise fall time high threshold percentage 90
+define rise fall time low value 0
+define rise fall time high value 3.3
+define sendmail command "/usr/lib/sendmail"
+define sequence time width 30.00
+define snap
+
+define source noprompt
+define time units default
+define userdefinedbussymbol
+define user guide directory "/usr/local/designacc/signalscan-6.7p1/doc/html"
+define waveform window grid off
+define waveform window waveheight 14
+define waveform window wavespace 6
+define web browser command netscape
+define zoom outfull on initial add off
+add group \
+ testbench \
+ can_testbench.receive_frame.arbitration_lost \
+ can_testbench.rx \
+ can_testbench.rx_and_tx \
+ can_testbench.i_can_top.i_can_bsp.sample_point \
+
+add group \
+ can_top \
+ can_testbench.i_can_top.i_can_bsp.arbitration_lost \
+ can_testbench.i_can_top.i_can_btl.transmitting \
+ can_testbench.i_can_top.i_can_bsp.tx_state \
+ can_testbench.i_can_top.i_can_bsp.transmitter \
+ can_testbench.i_can_top.ale_i \
+ can_testbench.i_can_top.clk_i \
+ can_testbench.i_can_top.cs_can_i \
+ can_testbench.i_can_top.irq_on \
+ can_testbench.i_can_top.port_0_io[7:0]'h \
+ can_testbench.i_can_top.rd_i \
+ can_testbench.i_can_top.rst_i \
+ can_testbench.i_can_top.rx_i \
+ can_testbench.i_can_top.tx_o \
+ can_testbench.i_can_top.tx_oen_o \
+ can_testbench.i_can_top.wr_i \
+ can_testbench.i_can_top.rx_i \
+ can_testbench.i_can_top.rx_sync \
+ can_testbench.i_can_top.i_can_bsp.hard_sync \
+ can_testbench.i_can_top.i_can_btl.resync \
+ can_testbench.i_can_top.i_can_bsp.rx_ack \
+ can_testbench.i_can_top.i_can_bsp.rx_ack_lim \
+ can_testbench.i_can_top.i_can_bsp.send_ack \
+ can_testbench.i_can_top.i_can_btl.sampled_bit \
+ can_testbench.i_can_top.i_can_bsp.rx_inter \
+ can_testbench.i_can_top.i_can_bsp.rx_idle \
+
+add group \
+ can_btl \
+ can_testbench.i_can_top.rx_i \
+ can_testbench.i_can_top.i_can_btl.rx \
+ can_testbench.i_can_top.i_can_btl.sync \
+ can_testbench.i_can_top.i_can_btl.seg1 \
+ can_testbench.i_can_top.i_can_btl.seg2 \
+ can_testbench.i_can_top.i_can_btl.sample_point \
+ can_testbench.i_can_top.i_can_btl.quant_cnt[3:0]'h \
+ can_testbench.i_can_top.i_can_btl.baud_r_presc[5:0]'h \
+ can_testbench.i_can_top.i_can_btl.clk \
+ can_testbench.i_can_top.i_can_btl.clk_cnt[6:0]'h \
+ can_testbench.i_can_top.i_can_btl.clk_en \
+ can_testbench.i_can_top.i_can_btl.delay[3:0]'h \
+ can_testbench.i_can_top.i_can_btl.go_seg1 \
+ can_testbench.i_can_top.i_can_btl.go_seg2 \
+ can_testbench.i_can_top.i_can_btl.go_sync \
+ can_testbench.i_can_top.i_can_btl.transmitting \
+ can_testbench.i_can_top.i_can_btl.hard_sync \
+ can_testbench.i_can_top.i_can_btl.hard_sync_blocked \
+ can_testbench.i_can_top.i_can_btl.preset_cnt[7:0]'h \
+ can_testbench.i_can_top.i_can_btl.quant_cnt[3:0]'h \
+ can_testbench.i_can_top.i_can_btl.resync \
+ can_testbench.i_can_top.i_can_btl.resync_latched \
+ can_testbench.i_can_top.i_can_btl.rst \
+ can_testbench.i_can_top.i_can_btl.rx_idle \
+ can_testbench.i_can_top.i_can_btl.sample[1:0]'h \
+ can_testbench.i_can_top.i_can_btl.sampled_bit \
+ can_testbench.i_can_top.i_can_btl.sampled_bit_q \
+ can_testbench.i_can_top.i_can_btl.sync \
+ can_testbench.i_can_top.i_can_btl.seg1 \
+ can_testbench.i_can_top.i_can_btl.seg2 \
+ can_testbench.i_can_top.i_can_btl.sync_blocked \
+ can_testbench.i_can_top.i_can_btl.sync_jump_width[1:0]'h \
+ can_testbench.i_can_top.i_can_btl.sync_window \
+ can_testbench.i_can_top.i_can_btl.time_segment1[3:0]'h \
+ can_testbench.i_can_top.i_can_btl.time_segment2[2:0]'h \
+ can_testbench.i_can_top.i_can_btl.transmitting \
+ can_testbench.i_can_top.i_can_btl.triple_sampling \
+ can_testbench.i_can_top.i_can_btl.tx_point \
+
+add group \
+ can_bsp \
+ can_testbench.i_can_top.i_can_bsp.arbitration_lost \
+ can_testbench.i_can_top.i_can_bsp.go_early_tx \
+ can_testbench.i_can_top.i_can_bsp.go_early_tx_latched \
+ can_testbench.i_can_top.i_can_bsp.ack_err_latched \
+ can_testbench.i_can_top.i_can_bsp.bit_err_latched \
+ can_testbench.i_can_top.i_can_bsp.form_err_latched \
+ can_testbench.i_can_top.i_can_bsp.stuff_err_latched \
+ can_testbench.i_can_top.i_can_bsp.crc_err \
+ can_testbench.i_can_top.i_can_bsp.ack_err \
+ can_testbench.i_can_top.i_can_bsp.bit_err \
+ can_testbench.i_can_top.i_can_bsp.form_err \
+ can_testbench.i_can_top.i_can_bsp.stuff_err \
+ can_testbench.i_can_top.i_can_bsp.err \
+ can_testbench.i_can_top.i_can_bsp.bit_err_exc1 \
+ can_testbench.i_can_top.i_can_bsp.bit_err_exc2 \
+ can_testbench.i_can_top.i_can_bsp.bit_err_exc3 \
+ can_testbench.i_can_top.i_can_btl.hard_sync \
+ can_testbench.i_can_top.i_can_btl.resync \
+ can_testbench.i_can_top.sampled_bit \
+ can_testbench.i_can_top.sampled_bit_q \
+ can_testbench.i_can_top.i_can_bsp.transmitting \
+ can_testbench.rx \
+ can_testbench.i_can_top.i_can_bsp.sample_point \
+ can_testbench.i_can_top.i_can_bsp.tx_point \
+ can_testbench.i_can_top.i_can_bsp.tx_point_q \
+ can_testbench.i_can_top.i_can_bsp.bit_stuff_cnt_tx[2:0]'h \
+ can_testbench.i_can_top.i_can_bsp.bit_de_stuff_tx \
+ can_testbench.i_can_top.i_can_bsp.tx_pointer[5:0]'h \
+ can_testbench.i_can_top.i_can_bsp.basic_chain[18:0]'h \
+ can_testbench.i_can_top.i_can_bsp.basic_chain_data[63:0]'h \
+ can_testbench.i_can_top.i_can_bsp.extended_chain_std[18:0]'h \
+ can_testbench.i_can_top.i_can_bsp.extended_chain_ext[38:0]'h \
+ can_testbench.i_can_top.i_can_bsp.extended_mode \
+ can_testbench.i_can_top.i_can_bsp.rst_tx_pointer \
+ can_testbench.i_can_top.i_can_bsp.addr[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.bit_cnt[5:0]'h \
+ can_testbench.i_can_top.i_can_bsp.bit_de_stuff \
+ can_testbench.i_can_top.i_can_bsp.bit_de_stuff_reset \
+ can_testbench.i_can_top.i_can_bsp.bit_de_stuff_set \
+ can_testbench.i_can_top.i_can_bsp.bit_stuff_cnt[2:0]'h \
+ can_testbench.i_can_top.i_can_bsp.bit_stuff_cnt_en \
+ can_testbench.i_can_top.i_can_bsp.byte_cnt[2:0]'h \
+ can_testbench.i_can_top.i_can_bsp.calculated_crc[14:0]'h \
+ can_testbench.i_can_top.i_can_bsp.r_calculated_crc[15:0]'h \
+ can_testbench.i_can_top.i_can_bsp.crc_in[14:0]'h \
+ can_testbench.i_can_top.i_can_bsp.clk \
+ can_testbench.i_can_top.i_can_bsp.crc_enable \
+ can_testbench.i_can_top.i_can_bsp.data_cnt[3:0]'h \
+ can_testbench.i_can_top.i_can_bsp.data_for_fifo[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.data_len[3:0]'h \
+ can_testbench.i_can_top.i_can_bsp.data_out[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.transmitter \
+ can_testbench.i_can_top.i_can_bsp.arbitration_field \
+ can_testbench.i_can_top.i_can_bsp.sampled_bit \
+ can_testbench.i_can_top.i_can_bsp.wr_fifo \
+ can_testbench.i_can_top.i_can_bsp.overload_needed \
+ can_testbench.i_can_top.i_can_bsp.overload_frame \
+ can_testbench.i_can_top.i_can_bsp.overload_frame_ended \
+ can_testbench.i_can_top.i_can_bsp.overload_flag_over \
+ can_testbench.i_can_top.i_can_bsp.overload_cnt1[2:0]'h \
+ can_testbench.i_can_top.i_can_bsp.overload_cnt2[2:0]'h \
+ can_testbench.i_can_top.i_can_bsp.enable_overload_cnt2 \
+ can_testbench.i_can_top.i_can_bsp.transmitter \
+ can_testbench.i_can_top.i_can_bsp.suspend \
+ can_testbench.i_can_top.i_can_bsp.enable_error_cnt2 \
+ can_testbench.i_can_top.i_can_bsp.error_flag_over \
+ can_testbench.i_can_top.i_can_bsp.rx_err_cnt_blocked \
+ can_testbench.i_can_top.i_can_bsp.rule5 \
+ can_testbench.i_can_top.i_can_bsp.rule3_exc1_1 \
+ can_testbench.i_can_top.i_can_bsp.rule3_exc1_2 \
+ can_testbench.i_can_top.i_can_bsp.rule3_exc2 \
+ can_testbench.i_can_top.i_can_bsp.go_error_frame \
+ can_testbench.i_can_top.i_can_bsp.error_frame \
+ can_testbench.i_can_top.i_can_bsp.go_overload_frame \
+ can_testbench.i_can_top.i_can_bsp.go_rx_inter \
+ can_testbench.i_can_top.i_can_bsp.overload_frame \
+ can_testbench.i_can_top.i_can_bsp.overload_frame_ended \
+ can_testbench.i_can_top.i_can_bsp.passive_cnt[2:0]'h \
+ can_testbench.i_can_top.i_can_bsp.eof_cnt[2:0]'h \
+ can_testbench.i_can_top.i_can_bsp.wr_fifo \
+ can_testbench.i_can_top.i_can_bsp.error_cnt1[2:0]'h \
+ can_testbench.i_can_top.i_can_bsp.error_cnt2[2:0]'h \
+ can_testbench.i_can_top.i_can_bsp.error_frame \
+ can_testbench.i_can_top.i_can_bsp.error_frame_ended \
+ can_testbench.i_can_top.i_can_bsp.id_ok \
+ can_testbench.i_can_top.i_can_bsp.rx_inter \
+ can_testbench.i_can_top.i_can_bsp.err \
+ can_testbench.i_can_top.i_can_bsp.node_error_passive \
+ can_testbench.i_can_top.i_can_bsp.node_bus_off \
+ can_testbench.i_can_top.i_can_bsp.rtr1 \
+ can_testbench.i_can_top.i_can_bsp.rtr2 \
+ can_testbench.i_can_top.i_can_bsp.bit_de_stuff_tx \
+ can_testbench.i_can_top.i_can_bsp.bit_stuff_cnt_tx[2:0]'h \
+ can_testbench.i_can_top.i_can_bsp.bit_stuff_cnt_en \
+ can_testbench.i_can_top.i_can_bsp.bit_de_stuff_set \
+ can_testbench.i_can_top.i_can_bsp.bit_de_stuff_reset \
+ can_testbench.i_can_top.i_can_btl.hard_sync \
+ can_testbench.i_can_top.i_can_btl.resync \
+ can_testbench.i_can_top.i_can_bsp.tx_pointer[5:0]'h \
+ can_testbench.rx \
+ can_testbench.i_can_top.i_can_bsp.sample_point \
+ can_testbench.i_can_top.i_can_bsp.tx_point \
+ can_testbench.i_can_top.i_can_bsp.rx_ack \
+ can_testbench.i_can_top.i_can_bsp.rx_ack_lim \
+ can_testbench.i_can_top.i_can_bsp.rx_crc \
+ can_testbench.i_can_top.i_can_bsp.rx_crc_lim \
+ can_testbench.i_can_top.i_can_bsp.rx_data \
+ can_testbench.i_can_top.i_can_bsp.rx_dlc \
+ can_testbench.i_can_top.i_can_bsp.finish_msg \
+ can_testbench.i_can_top.i_can_bsp.tx_state \
+ can_testbench.i_can_top.i_can_bsp.rx_eof \
+ can_testbench.i_can_top.i_can_bsp.rx_id1 \
+ can_testbench.i_can_top.i_can_bsp.rx_id2 \
+ can_testbench.i_can_top.i_can_bsp.rx_ide \
+ can_testbench.i_can_top.i_can_bsp.rx_idle \
+ can_testbench.i_can_top.i_can_bsp.rx_inter \
+ can_testbench.i_can_top.i_can_bsp.suspend \
+ can_testbench.i_can_top.i_can_bsp.susp_cnt_en \
+ can_testbench.i_can_top.i_can_bsp.susp_cnt[2:0]'h \
+ can_testbench.i_can_top.i_can_bsp.rx_r0 \
+ can_testbench.i_can_top.i_can_bsp.rx_r1 \
+ can_testbench.i_can_top.i_can_bsp.rx_rtr1 \
+ can_testbench.i_can_top.i_can_bsp.rx_rtr2 \
+ can_testbench.i_can_top.i_can_bsp.extended_mode \
+ can_testbench.i_can_top.i_can_bsp.go_early_tx \
+ can_testbench.i_can_top.i_can_bsp.go_tx \
+ can_testbench.i_can_top.i_can_bsp.need_to_tx \
+ can_testbench.i_can_top.i_can_bsp.tx_request \
+ can_testbench.i_can_top.i_can_bsp.clk \
+ can_testbench.i_can_top.i_can_bsp.tx_state \
+ can_testbench.i_can_top.i_can_bsp.transmitting \
+ can_testbench.i_can_top.i_can_bsp.go_crc_enable \
+ can_testbench.i_can_top.i_can_bsp.go_error_frame \
+ can_testbench.i_can_top.i_can_bsp.go_rx_ack \
+ can_testbench.i_can_top.i_can_bsp.go_rx_ack_lim \
+ can_testbench.i_can_top.i_can_bsp.go_rx_crc \
+ can_testbench.i_can_top.i_can_bsp.go_rx_crc_lim \
+ can_testbench.i_can_top.i_can_bsp.go_rx_data \
+ can_testbench.i_can_top.i_can_bsp.go_rx_dlc \
+ can_testbench.i_can_top.i_can_bsp.go_rx_eof \
+ can_testbench.i_can_top.i_can_bsp.go_rx_id1 \
+ can_testbench.i_can_top.i_can_bsp.go_rx_id2 \
+ can_testbench.i_can_top.i_can_bsp.go_rx_ide \
+ can_testbench.i_can_top.i_can_bsp.go_rx_idle \
+ can_testbench.i_can_top.i_can_bsp.go_rx_inter \
+ can_testbench.i_can_top.i_can_bsp.go_overload_frame \
+ can_testbench.i_can_top.i_can_bsp.go_rx_r0 \
+ can_testbench.i_can_top.i_can_bsp.go_rx_r1 \
+ can_testbench.i_can_top.i_can_bsp.go_rx_rtr1 \
+ can_testbench.i_can_top.i_can_bsp.go_rx_rtr2 \
+ can_testbench.i_can_top.i_can_bsp.hard_sync \
+ can_testbench.i_can_top.i_can_bsp.header_cnt[2:0]'h \
+ can_testbench.i_can_top.i_can_bsp.header_len[2:0]'h \
+ can_testbench.i_can_top.i_can_bsp.id[28:0]'h \
+ can_testbench.i_can_top.i_can_bsp.id_ok \
+ can_testbench.i_can_top.i_can_bsp.ide \
+ can_testbench.i_can_top.i_can_bsp.limited_data_len[3:0]'h \
+ can_testbench.i_can_top.i_can_bsp.limited_data_len_minus1[3:0]'h \
+ can_testbench.i_can_top.i_can_bsp.no_byte0 \
+ can_testbench.i_can_top.i_can_bsp.no_byte1 \
+ can_testbench.i_can_top.i_can_bsp.release_buffer \
+ can_testbench.i_can_top.i_can_bsp.remote_rq \
+ can_testbench.i_can_top.i_can_bsp.reset_mode \
+ can_testbench.i_can_top.i_can_bsp.reset_mode_q \
+ can_testbench.i_can_top.i_can_bsp.reset_wr_fifo \
+ can_testbench.i_can_top.i_can_bsp.rst \
+ can_testbench.i_can_top.i_can_bsp.rst_crc_enable \
+ can_testbench.i_can_top.i_can_bsp.sample_point \
+ can_testbench.i_can_top.i_can_bsp.sampled_bit_q \
+ can_testbench.i_can_top.i_can_bsp.storing_header \
+ can_testbench.i_can_top.i_can_bsp.tmp_data[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.write_data_to_tmp_fifo \
+ can_testbench.i_can_top.i_can_bsp.wr_fifo \
+ can_testbench.i_can_top.i_can_bsp.reset_wr_fifo \
+ can_testbench.i_can_top.i_can_bsp.transmitting \
+ can_testbench.i_can_top.i_can_bsp.tx \
+ can_testbench.i_can_top.i_can_bsp.tx_data_0[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.tx_data_1[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.tx_data_2[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.tx_data_3[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.tx_data_4[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.tx_data_5[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.tx_data_6[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.tx_data_7[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.tx_data_8[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.tx_data_9[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.tx_data_10[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.tx_data_11[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.tx_data_12[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.tx_point \
+ can_testbench.i_can_top.i_can_bsp.wr_fifo \
+
+add group \
+ can_acf \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.acceptance_code_0[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.acceptance_code_1[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.acceptance_code_2[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.acceptance_code_3[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.acceptance_filter_mode \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.acceptance_mask_0[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.acceptance_mask_1[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.acceptance_mask_2[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.acceptance_mask_3[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.clk \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.data0[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.data1[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.extended_mode \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.go_rx_crc_lim \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.id[28:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.id_ok \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.ide \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.match \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.match_df_ext \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.match_df_std \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.match_sf_ext \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.match_sf_std \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.reset_mode \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.rst \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.rtr1 \
+ can_testbench.i_can_top.i_can_bsp.i_can_acf.rtr2 \
+
+add group \
+ can_fifo \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.clk \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.data_in[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.data_out[7:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.extended_mode \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.fifo_cnt[6:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.fifo_empty \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.fifo_full \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.latch_overrun \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.len_cnt[3:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.rd_pointer[5:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.read_address[5:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.reset_mode \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.rst \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.wr_pointer[5:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.wr_q \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.write_length_info \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.info_cnt[6:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.wr_info_pointer[5:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.info_empty \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.info_full \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.rd_info_pointer[5:0]'h \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.wr \
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.release_buffer \
+
+add group \
+ can_registers \
+ can_testbench.i_can_top.i_can_registers.clk \
+ can_testbench.i_can_top.i_can_registers.reset_mode \
+ can_testbench.i_can_top.i_can_registers.addr[7:0]'h \
+ can_testbench.i_can_top.i_can_registers.cs \
+ can_testbench.i_can_top.i_can_registers.release_buffer \
+ can_testbench.i_can_top.i_can_registers.clear_data_overrun \
+ can_testbench.i_can_top.i_can_registers.error_status \
+ can_testbench.i_can_top.i_can_registers.overrun_status \
+ can_testbench.i_can_top.i_can_registers.receive_buffer_status \
+ can_testbench.i_can_top.i_can_registers.receive_status \
+ can_testbench.i_can_top.i_can_registers.status[7:0]'h \
+ can_testbench.i_can_top.i_can_registers.transmit_buffer_status \
+ can_testbench.i_can_top.i_can_registers.transmit_status \
+ can_testbench.i_can_top.i_can_registers.extended_mode \
+ can_testbench.i_can_top.i_can_registers.data_overrun_irq_en \
+ can_testbench.i_can_top.i_can_registers.transmit_irq_en \
+ can_testbench.i_can_top.i_can_registers.receive_irq_en \
+ can_testbench.i_can_top.i_can_registers.error_warning_irq_en \
+ can_testbench.i_can_top.i_can_registers.bus_error_irq_en \
+ can_testbench.i_can_top.i_can_registers.irq \
+ can_testbench.i_can_top.i_can_registers.read_irq_reg \
+
+add group \
+ tmp \
+ can_testbench.i_can_top.cs \
+
+
+deselect all
+add register Default \
+ fontsize 12 \
+
+
+open window waveform 1 geometry 10 60 1592 1139
+zoom at 56539.58(0)ns 0.00581205 0.00000000
Index: tags/rel_22/sim/rtl_sim/run/clean
===================================================================
--- tags/rel_22/sim/rtl_sim/run/clean (nonexistent)
+++ tags/rel_22/sim/rtl_sim/run/clean (revision 146)
@@ -0,0 +1,4 @@
+rm ../bin/INCA_libs/worklib/*
+rm ../bin/INCA_libs/worklib/.*
+rm ../log/*.log
+rm -rf ../out/*.shm
tags/rel_22/sim/rtl_sim/run/clean
Property changes :
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property
Index: tags/rel_22/sim/rtl_sim/bin/memory_file_list
===================================================================
--- tags/rel_22/sim/rtl_sim/bin/memory_file_list (nonexistent)
+++ tags/rel_22/sim/rtl_sim/bin/memory_file_list (revision 146)
@@ -0,0 +1,4 @@
+art_hstp_64x4_bist.v
+art_hstp_64x8_bist.v
+art_hsdp_64x8/art_hsdp_64x8.v
+art_hsdp_64x4/art_hsdp_64x4.v
Index: tags/rel_22/sim/rtl_sim/bin/rtl_file_list
===================================================================
--- tags/rel_22/sim/rtl_sim/bin/rtl_file_list (nonexistent)
+++ tags/rel_22/sim/rtl_sim/bin/rtl_file_list (revision 146)
@@ -0,0 +1,12 @@
+can_btl.v
+can_registers.v
+can_register.v
+can_register_asyn.v
+can_register_syn.v
+can_register_asyn_syn.v
+can_top.v
+can_bsp.v
+can_crc.v
+can_acf.v
+can_fifo.v
+can_ibo.v
Index: tags/rel_22/sim/rtl_sim/bin/sim_file_list
===================================================================
--- tags/rel_22/sim/rtl_sim/bin/sim_file_list (nonexistent)
+++ tags/rel_22/sim/rtl_sim/bin/sim_file_list (revision 146)
@@ -0,0 +1,3 @@
+timescale.v
+can_testbench_defines.v
+can_testbench.v
tags/rel_22/sim/rtl_sim/bin/sim_file_list
Property changes :
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property
Index: tags/rel_22/sim/rtl_sim/bin/INCA_libs/worklib/dir_keeper
===================================================================
Index: tags/rel_22/sim/rtl_sim/bin/cds.lib
===================================================================
--- tags/rel_22/sim/rtl_sim/bin/cds.lib (nonexistent)
+++ tags/rel_22/sim/rtl_sim/bin/cds.lib (revision 146)
@@ -0,0 +1,6 @@
+#
+# cds.lib: Defines the locations of compiled libraries.
+# Created by ncprep on Tue Jul 3 11:40:44 2001
+#
+
+define worklib ./INCA_libs/worklib
tags/rel_22/sim/rtl_sim/bin/cds.lib
Property changes :
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property
Index: tags/rel_22/sim/rtl_sim/bin/hdl.var
===================================================================
--- tags/rel_22/sim/rtl_sim/bin/hdl.var (nonexistent)
+++ tags/rel_22/sim/rtl_sim/bin/hdl.var (revision 146)
@@ -0,0 +1,9 @@
+#
+# hdl.var: Defines variables used by the INCA tools.
+# Created by ncprep on Tue Jul 3 11:40:44 2001
+#
+
+softinclude $CDS_INST_DIR/tools/inca/files/hdl.var
+
+define LIB_MAP ( $LIB_MAP, + => worklib )
+define VIEW_MAP ( $VIEW_MAP, .v => v)
tags/rel_22/sim/rtl_sim/bin/hdl.var
Property changes :
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property
Index: tags/rel_22/sim/rtl_sim/log/dir_keeper
===================================================================
--- tags/rel_22/sim/rtl_sim/log/dir_keeper (nonexistent)
+++ tags/rel_22/sim/rtl_sim/log/dir_keeper (revision 146)
@@ -0,0 +1 @@
+Only keeper of empty directories
tags/rel_22/sim/rtl_sim/log/dir_keeper
Property changes :
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property
Index: tags/rel_22/sim/rtl_sim/out/dir_keeper
===================================================================
--- tags/rel_22/sim/rtl_sim/out/dir_keeper (nonexistent)
+++ tags/rel_22/sim/rtl_sim/out/dir_keeper (revision 146)
@@ -0,0 +1 @@
+Only keeper of empty directories
tags/rel_22/sim/rtl_sim/out/dir_keeper
Property changes :
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property
Index: tags/rel_22/bench/verilog/can_testbench.v
===================================================================
--- tags/rel_22/bench/verilog/can_testbench.v (nonexistent)
+++ tags/rel_22/bench/verilog/can_testbench.v (revision 146)
@@ -0,0 +1,2098 @@
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// can_testbench.v ////
+//// ////
+//// ////
+//// This file is part of the CAN Protocol Controller ////
+//// http://www.opencores.org/projects/can/ ////
+//// ////
+//// ////
+//// Author(s): ////
+//// Igor Mohor ////
+//// igorm@opencores.org ////
+//// ////
+//// ////
+//// All additional information is available in the README.txt ////
+//// file. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// Copyright (C) 2002, 2003 Authors ////
+//// ////
+//// This source file may be used and distributed without ////
+//// restriction provided that this copyright statement is not ////
+//// removed from the file and that any derivative work contains ////
+//// the original copyright notice and the associated disclaimer. ////
+//// ////
+//// This source file is free software; you can redistribute it ////
+//// and/or modify it under the terms of the GNU Lesser General ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any ////
+//// later version. ////
+//// ////
+//// This source is distributed in the hope that it will be ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
+//// PURPOSE. See the GNU Lesser General Public License for more ////
+//// details. ////
+//// ////
+//// You should have received a copy of the GNU Lesser General ////
+//// Public License along with this source; if not, download it ////
+//// from http://www.opencores.org/lgpl.shtml ////
+//// ////
+//// The CAN protocol is developed by Robert Bosch GmbH and ////
+//// protected by patents. Anybody who wants to implement this ////
+//// CAN IP core on silicon has to obtain a CAN protocol license ////
+//// from Bosch. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//
+// CVS Revision History
+//
+// $Log: not supported by cvs2svn $
+// Revision 1.39 2004/03/18 17:15:26 igorm
+// Signal bus_off_on added.
+//
+// Revision 1.38 2003/10/17 05:55:18 markom
+// mbist signals updated according to newest convention
+//
+// Revision 1.37 2003/09/30 20:53:58 mohor
+// Fixing the core to be Bosch VHDL Reference compatible.
+//
+// Revision 1.36 2003/08/20 10:03:20 mohor
+// Artisan RAMs added.
+//
+// Revision 1.35 2003/06/17 15:14:48 mohor
+// cs_can_i is used only when WISHBONE interface is not used.
+//
+// Revision 1.34 2003/03/26 11:25:39 mohor
+// CAN inturrupt is active low.
+//
+// Revision 1.33 2003/03/14 19:37:30 mohor
+// ALE changes on negedge of clk.
+//
+// Revision 1.32 2003/03/12 05:57:36 mohor
+// Bidirectional port_0_i changed to port_0_io.
+// input cs_can changed to cs_can_i.
+//
+// Revision 1.31 2003/03/12 04:40:00 mohor
+// rd_i and wr_i are active high signals. If 8051 is connected, these two signals
+// need to be negated one level higher.
+//
+// Revision 1.30 2003/03/12 04:16:40 mohor
+// 8051 interface added (besides WISHBONE interface). Selection is made in
+// can_defines.v file.
+//
+// Revision 1.29 2003/03/05 15:33:37 mohor
+// tx_o is now tristated signal. tx_oen and tx_o combined together.
+//
+// Revision 1.28 2003/03/05 15:00:49 mohor
+// Top level signal names changed.
+//
+// Revision 1.27 2003/03/01 22:48:26 mohor
+// Actel APA ram supported.
+//
+// Revision 1.26 2003/02/19 14:43:17 mohor
+// CAN core finished. Host interface added. Registers finished.
+// Synchronization to the wishbone finished.
+//
+// Revision 1.25 2003/02/18 00:19:39 mohor
+// Temporary backup version (still fully operable).
+//
+// Revision 1.24 2003/02/14 20:16:53 mohor
+// Several registers added. Not finished, yet.
+//
+// Revision 1.23 2003/02/12 14:28:30 mohor
+// Errors monitoring improved. arbitration_lost improved.
+//
+// Revision 1.22 2003/02/11 00:57:19 mohor
+// Wishbone interface added.
+//
+// Revision 1.21 2003/02/09 18:40:23 mohor
+// Overload fixed. Hard synchronization also enabled at the last bit of
+// interframe.
+//
+// Revision 1.20 2003/02/09 02:24:11 mohor
+// Bosch license warning added. Error counters finished. Overload frames
+// still need to be fixed.
+//
+// Revision 1.19 2003/02/04 17:24:33 mohor
+// Backup.
+//
+// Revision 1.18 2003/02/04 14:34:45 mohor
+// *** empty log message ***
+//
+// Revision 1.17 2003/01/31 01:13:31 mohor
+// backup.
+//
+// Revision 1.16 2003/01/16 13:36:14 mohor
+// Form error supported. When receiving messages, last bit of the end-of-frame
+// does not generate form error. Receiver goes to the idle mode one bit sooner.
+// (CAN specification ver 2.0, part B, page 57).
+//
+// Revision 1.15 2003/01/15 21:05:06 mohor
+// CRC checking fixed (when bitstuff occurs at the end of a CRC sequence).
+//
+// Revision 1.14 2003/01/15 14:40:16 mohor
+// RX state machine fixed to receive "remote request" frames correctly. No
+// data bytes are written to fifo when such frames are received.
+//
+// Revision 1.13 2003/01/15 13:16:42 mohor
+// When a frame with "remote request" is received, no data is stored to
+// fifo, just the frame information (identifier, ...). Data length that
+// is stored is the received data length and not the actual data length
+// that is stored to fifo.
+//
+// Revision 1.12 2003/01/14 17:25:03 mohor
+// Addresses corrected to decimal values (previously hex).
+//
+// Revision 1.11 2003/01/14 12:19:29 mohor
+// rx_fifo is now working.
+//
+// Revision 1.10 2003/01/10 17:51:28 mohor
+// Temporary version (backup).
+//
+// Revision 1.9 2003/01/09 21:54:39 mohor
+// rx fifo added. Not 100 % verified, yet.
+//
+// Revision 1.8 2003/01/08 02:09:43 mohor
+// Acceptance filter added.
+//
+// Revision 1.7 2002/12/28 04:13:53 mohor
+// Backup version.
+//
+// Revision 1.6 2002/12/27 00:12:48 mohor
+// Header changed, testbench improved to send a frame (crc still missing).
+//
+// Revision 1.5 2002/12/26 16:00:29 mohor
+// Testbench define file added. Clock divider register added.
+//
+// Revision 1.4 2002/12/26 01:33:01 mohor
+// Tripple sampling supported.
+//
+// Revision 1.3 2002/12/25 23:44:12 mohor
+// Commented lines removed.
+//
+// Revision 1.2 2002/12/25 14:16:54 mohor
+// Synchronization working.
+//
+// Revision 1.1.1.1 2002/12/20 16:39:21 mohor
+// Initial
+//
+//
+//
+
+// synopsys translate_off
+`include "timescale.v"
+// synopsys translate_on
+`include "can_defines.v"
+`include "can_testbench_defines.v"
+
+module can_testbench();
+
+
+
+parameter Tp = 1;
+parameter BRP = 2*(`CAN_TIMING0_BRP + 1);
+
+
+`ifdef CAN_WISHBONE_IF
+ reg wb_clk_i;
+ reg wb_rst_i;
+ reg [7:0] wb_dat_i;
+ wire [7:0] wb_dat_o;
+ reg wb_cyc_i;
+ reg wb_stb_i;
+ reg wb_we_i;
+ reg [7:0] wb_adr_i;
+ wire wb_ack_o;
+ reg wb_free;
+`else
+ reg rst_i;
+ reg ale_i;
+ reg rd_i;
+ reg wr_i;
+ wire [7:0] port_0;
+ wire [7:0] port_0_i;
+ reg [7:0] port_0_o;
+ reg port_0_en;
+ reg port_free;
+`endif
+
+
+reg cs_can;
+reg clk;
+reg rx;
+wire tx;
+wire tx_i;
+wire bus_off_on;
+wire irq;
+wire clkout;
+
+wire rx_and_tx;
+
+integer start_tb;
+reg [7:0] tmp_data;
+reg delayed_tx;
+reg tx_bypassed;
+reg extended_mode;
+
+
+// Instantiate can_top module
+can_top i_can_top
+(
+`ifdef CAN_WISHBONE_IF
+ .wb_clk_i(wb_clk_i),
+ .wb_rst_i(wb_rst_i),
+ .wb_dat_i(wb_dat_i),
+ .wb_dat_o(wb_dat_o),
+ .wb_cyc_i(wb_cyc_i),
+ .wb_stb_i(wb_stb_i),
+ .wb_we_i(wb_we_i),
+ .wb_adr_i(wb_adr_i),
+ .wb_ack_o(wb_ack_o),
+`else
+ .cs_can_i(cs_can),
+ .rst_i(rst_i),
+ .ale_i(ale_i),
+ .rd_i(rd_i),
+ .wr_i(wr_i),
+ .port_0_io(port_0),
+`endif
+ .clk_i(clk),
+ .rx_i(rx_and_tx),
+ .tx_o(tx_i),
+ .bus_off_on(bus_off_on),
+ .irq_on(irq),
+ .clkout_o(clkout)
+
+ // Bist
+`ifdef CAN_BIST
+ ,
+ // debug chain signals
+ .mbist_si_i(1'b0), // bist scan serial in
+ .mbist_so_o(), // bist scan serial out
+ .mbist_ctrl_i(3'b001) // mbist scan {enable, clock, reset}
+`endif
+);
+
+
+// Combining tx with the output enable signal.
+assign tx = bus_off_on? tx_i : 1'bz;
+
+`ifdef CAN_WISHBONE_IF
+ // Generate wishbone clock signal 10 MHz
+ initial
+ begin
+ wb_clk_i=0;
+ forever #50 wb_clk_i = ~wb_clk_i;
+ end
+`endif
+
+
+`ifdef CAN_WISHBONE_IF
+`else
+ assign port_0_i = port_0;
+ assign port_0 = port_0_en? port_0_o : 8'hz;
+`endif
+
+
+// Generate clock signal 25 MHz
+initial
+begin
+ clk=0;
+ forever #20 clk = ~clk;
+end
+
+
+initial
+begin
+ start_tb = 0;
+ cs_can = 0;
+ rx = 1;
+ extended_mode = 0;
+ tx_bypassed = 0;
+
+ `ifdef CAN_WISHBONE_IF
+ wb_dat_i = 'hz;
+ wb_cyc_i = 0;
+ wb_stb_i = 0;
+ wb_we_i = 'hz;
+ wb_adr_i = 'hz;
+ wb_free = 1;
+ wb_rst_i = 1;
+ #200 wb_rst_i = 0;
+ #200 start_tb = 1;
+ `else
+ rst_i = 1'b0;
+ ale_i = 1'b0;
+ rd_i = 1'b0;
+ wr_i = 1'b0;
+ port_0_o = 8'h0;
+ port_0_en = 0;
+ port_free = 1;
+ rst_i = 1;
+ #200 rst_i = 0;
+ #200 start_tb = 1;
+ `endif
+end
+
+
+
+
+// Generating delayed tx signal (CAN transciever delay)
+always
+begin
+ wait (tx);
+ repeat (4*BRP) @ (posedge clk); // 4 time quants delay
+ #1 delayed_tx = tx;
+ wait (~tx);
+ repeat (4*BRP) @ (posedge clk); // 4 time quants delay
+ #1 delayed_tx = tx;
+end
+
+//assign rx_and_tx = rx & delayed_tx; FIX ME !!!
+assign rx_and_tx = rx & (delayed_tx | tx_bypassed); // When this signal is on, tx is not looped back to the rx.
+
+
+// Main testbench
+initial
+begin
+ wait(start_tb);
+
+ // Set bus timing register 0
+ write_register(8'd6, {`CAN_TIMING0_SJW, `CAN_TIMING0_BRP});
+
+ // Set bus timing register 1
+ write_register(8'd7, {`CAN_TIMING1_SAM, `CAN_TIMING1_TSEG2, `CAN_TIMING1_TSEG1});
+
+
+ // Set Clock Divider register
+ extended_mode = 1'b0;
+ write_register(8'd31, {extended_mode, 3'h0, 1'b0, 3'h0}); // Setting the normal mode (not extended)
+
+
+ // Set Acceptance Code and Acceptance Mask registers (their address differs for basic and extended mode
+/*
+ // Set Acceptance Code and Acceptance Mask registers
+ write_register(8'd16, 8'ha6); // acceptance code 0
+ write_register(8'd17, 8'hb0); // acceptance code 1
+ write_register(8'd18, 8'h12); // acceptance code 2
+ write_register(8'd19, 8'h30); // acceptance code 3
+ write_register(8'd20, 8'h0); // acceptance mask 0
+ write_register(8'd21, 8'h0); // acceptance mask 1
+ write_register(8'd22, 8'h00); // acceptance mask 2
+ write_register(8'd23, 8'h00); // acceptance mask 3
+*/
+
+ // Set Acceptance Code and Acceptance Mask registers
+ write_register(8'd4, 8'he8); // acceptance code
+ write_register(8'd5, 8'h0f); // acceptance mask
+
+ #10;
+ repeat (1000) @ (posedge clk);
+
+ // Switch-off reset mode
+ write_register(8'd0, {7'h0, ~(`CAN_MODE_RESET)});
+
+ repeat (BRP) @ (posedge clk); // At least BRP clocks needed before bus goes to dominant level. Otherwise 1 quant difference is possible
+ // This difference is resynchronized later.
+
+ // After exiting the reset mode sending bus free
+ repeat (11) send_bit(1);
+
+ test_synchronization; // test currently switched off
+// test_empty_fifo_ext; // test currently switched off
+// test_full_fifo_ext; // test currently switched off
+// send_frame_ext; // test currently switched off
+// test_empty_fifo; // test currently switched off
+// test_full_fifo; // test currently switched on
+// bus_off_test; // test currently switched off
+// forced_bus_off; // test currently switched off
+// send_frame_basic; // test currently switched off
+// send_frame_extended; // test currently switched off
+// self_reception_request; // test currently switched off
+// manual_frame_basic; // test currently switched off
+// manual_frame_ext; // test currently switched off
+
+ $display("CAN Testbench finished !");
+ $stop;
+end
+
+
+task forced_bus_off; // Forcing bus-off by writinf to tx_err_cnt register
+ begin
+
+ // Switch-on reset mode
+ write_register(8'd0, {7'h0, `CAN_MODE_RESET});
+
+ // Set Clock Divider register
+ write_register(8'd31, {1'b1, 7'h0}); // Setting the extended mode (not normal)
+
+ // Write 255 to tx_err_cnt register - Forcing bus-off
+ write_register(8'd15, 255);
+
+ // Switch-off reset mode
+ write_register(8'd0, {7'h0, ~(`CAN_MODE_RESET)});
+
+// #1000000;
+ #2500000;
+
+
+ // Switch-on reset mode
+ write_register(8'd0, {7'h0, `CAN_MODE_RESET});
+
+ // Write 245 to tx_err_cnt register
+ write_register(8'd15, 245);
+
+ // Switch-off reset mode
+ write_register(8'd0, {7'h0, ~(`CAN_MODE_RESET)});
+
+ #1000000;
+
+
+ end
+endtask // forced_bus_off
+
+
+task manual_frame_basic; // Testbench sends a basic format frame
+ begin
+
+
+ // Switch-on reset mode
+ write_register(8'd0, {7'h0, (`CAN_MODE_RESET)});
+
+ // Set Acceptance Code and Acceptance Mask registers
+ write_register(8'd4, 8'h28); // acceptance code
+ write_register(8'd5, 8'hff); // acceptance mask
+
+ repeat (100) @ (posedge clk);
+
+ // Switch-off reset mode
+ write_register(8'd0, {7'h0, ~(`CAN_MODE_RESET)});
+
+ // After exiting the reset mode sending bus free
+ repeat (11) send_bit(1);
+
+
+ write_register(8'd10, 8'h55); // Writing ID[10:3] = 0x55
+ write_register(8'd11, 8'h57); // Writing ID[2:0] = 0x2, rtr = 1, length = 7
+ write_register(8'd12, 8'h00); // data byte 1
+ write_register(8'd13, 8'h00); // data byte 2
+ write_register(8'd14, 8'h00); // data byte 3
+ write_register(8'd15, 8'h00); // data byte 4
+ write_register(8'd16, 8'h00); // data byte 5
+ write_register(8'd17, 8'h00); // data byte 6
+ write_register(8'd18, 8'h00); // data byte 7
+ write_register(8'd19, 8'h00); // data byte 8
+
+ tx_bypassed = 1; // When this signal is on, tx is not looped back to the rx.
+
+ fork
+ begin
+// tx_request_command;
+ self_reception_request_command;
+ end
+
+ begin
+ #2200;
+
+
+ repeat (1)
+ begin
+ send_bit(0); // SOF
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(1); // RTR
+ send_bit(0); // IDE
+ send_bit(0); // r0
+ send_bit(0); // DLC
+ send_bit(1); // DLC
+ send_bit(1); // DLC
+ send_bit(1); // DLC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(0); // CRC stuff
+ send_bit(0); // CRC 6
+ send_bit(0); // CRC
+ send_bit(0); // CRC
+ send_bit(0); // CRC
+ send_bit(1); // CRC stuff
+ send_bit(0); // CRC 0
+ send_bit(0); // CRC
+ send_bit(1); // CRC
+ send_bit(0); // CRC
+ send_bit(1); // CRC 5
+ send_bit(1); // CRC
+ send_bit(0); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC b
+ send_bit(1); // CRC DELIM
+ send_bit(0); // ACK
+ send_bit(1); // ACK DELIM
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // INTER
+ send_bit(1); // INTER
+ send_bit(1); // INTER
+ end // repeat
+
+
+
+ end
+
+
+ join
+
+
+
+ read_receive_buffer;
+ release_rx_buffer_command;
+
+ read_receive_buffer;
+ release_rx_buffer_command;
+ read_receive_buffer;
+
+ #4000000;
+
+ end
+endtask // manual_frame_basic
+
+
+
+task manual_frame_ext; // Testbench sends an extended format frame
+ begin
+
+
+ // Switch-on reset mode
+ write_register(8'd0, {7'h0, (`CAN_MODE_RESET)});
+
+ // Set Clock Divider register
+ extended_mode = 1'b1;
+ write_register(8'd31, {extended_mode, 7'h0}); // Setting the extended mode
+
+ // Set Acceptance Code and Acceptance Mask registers
+ write_register(8'd16, 8'ha6); // acceptance code 0
+ write_register(8'd17, 8'h00); // acceptance code 1
+ write_register(8'd18, 8'h5a); // acceptance code 2
+ write_register(8'd19, 8'hac); // acceptance code 3
+ write_register(8'd20, 8'h00); // acceptance mask 0
+ write_register(8'd21, 8'h00); // acceptance mask 1
+ write_register(8'd22, 8'h00); // acceptance mask 2
+ write_register(8'd23, 8'h00); // acceptance mask 3
+
+ repeat (100) @ (posedge clk);
+
+ // Switch-off reset mode
+ write_register(8'd0, {7'h0, ~(`CAN_MODE_RESET)});
+
+ // After exiting the reset mode sending bus free
+ repeat (11) send_bit(1);
+
+
+ // Extended frame format
+ // Writing TX frame information + identifier + data
+ write_register(8'd16, 8'hc5); // Frame format = 1, Remote transmision request = 1, DLC = 5
+ write_register(8'd17, 8'ha6); // ID[28:21] = a6
+ write_register(8'd18, 8'h00); // ID[20:13] = 00
+ write_register(8'd19, 8'h5a); // ID[12:5] = 5a
+ write_register(8'd20, 8'ha8); // ID[4:0] = 15
+ // write_register(8'd21, 8'h78); RTR does not send any data
+ // write_register(8'd22, 8'h9a);
+ // write_register(8'd23, 8'hbc);
+ // write_register(8'd24, 8'hde);
+ // write_register(8'd25, 8'hf0);
+ // write_register(8'd26, 8'h0f);
+ // write_register(8'd27, 8'hed);
+ // write_register(8'd28, 8'hcb);
+
+
+ // Enabling IRQ's (extended mode)
+ write_register(8'd4, 8'hff);
+
+ // tx_bypassed = 1; // When this signal is on, tx is not looped back to the rx.
+
+ fork
+ begin
+ tx_request_command;
+// self_reception_request_command;
+ end
+
+ begin
+ #2400;
+
+ repeat (1)
+ begin
+ send_bit(0); // SOF
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID a
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID 6
+ send_bit(0); // ID
+ send_bit(0); // ID
+ send_bit(0); // ID
+ send_bit(1); // RTR
+ send_bit(1); // IDE
+ send_bit(0); // ID 0
+ send_bit(0); // ID
+ send_bit(0); // ID
+ send_bit(0); // ID
+ send_bit(0); // ID 0
+ send_bit(1); // ID stuff
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID 6
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID a
+ send_bit(1); // ID 1
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID 5
+ send_bit(1); // RTR
+ send_bit(0); // r1
+ send_bit(0); // r0
+ send_bit(0); // DLC
+ send_bit(1); // DLC
+ send_bit(0); // DLC
+ send_bit(1); // DLC
+ send_bit(1); // CRC
+ send_bit(0); // CRC
+ send_bit(0); // CRC 4
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(0); // CRC
+ send_bit(1); // CRC d
+ send_bit(0); // CRC
+ send_bit(0); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC 3
+ send_bit(1); // CRC
+ send_bit(0); // CRC
+ send_bit(0); // CRC
+ send_bit(1); // CRC 9
+ send_bit(1); // CRC DELIM
+ send_bit(0); // ACK
+ send_bit(1); // ACK DELIM
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // INTER
+ send_bit(1); // INTER
+ send_bit(1); // INTER
+ end // repeat
+
+
+ end
+
+ join
+
+
+
+ read_receive_buffer;
+ release_rx_buffer_command;
+
+ read_receive_buffer;
+ release_rx_buffer_command;
+ read_receive_buffer;
+
+ // Read irq register
+ #1 read_register(8'd3);
+
+ // Read error code capture register
+ read_register(8'd12);
+
+ // Read error capture code register
+// read_register(8'd12);
+
+ #4000000;
+
+ end
+endtask // manual_frame_ext
+
+
+
+task bus_off_test; // Testbench sends a frame
+ begin
+
+ write_register(8'd10, 8'he8); // Writing ID[10:3] = 0xe8
+ write_register(8'd11, 8'hb7); // Writing ID[2:0] = 0x5, rtr = 1, length = 7
+ write_register(8'd12, 8'h00); // data byte 1
+ write_register(8'd13, 8'h00); // data byte 2
+ write_register(8'd14, 8'h00); // data byte 3
+ write_register(8'd15, 8'h00); // data byte 4
+ write_register(8'd16, 8'h00); // data byte 5
+ write_register(8'd17, 8'h00); // data byte 6
+ write_register(8'd18, 8'h00); // data byte 7
+ write_register(8'd19, 8'h00); // data byte 8
+
+ fork
+ begin
+ tx_request_command;
+ end
+
+ begin
+ #2000;
+
+ repeat (16)
+ begin
+ send_bit(0); // SOF
+ send_bit(1); // ID
+ send_bit(1); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(0); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(1); // RTR
+ send_bit(0); // IDE
+ send_bit(0); // r0
+ send_bit(0); // DLC
+ send_bit(1); // DLC
+ send_bit(1); // DLC
+ send_bit(1); // DLC
+ send_bit(1); // CRC
+ send_bit(0); // CRC
+ send_bit(0); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(0); // CRC
+ send_bit(1); // CRC
+ send_bit(0); // CRC
+ send_bit(0); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC DELIM
+ send_bit(1); // ACK ack error
+ send_bit(0); // ERROR
+ send_bit(0); // ERROR
+ send_bit(0); // ERROR
+ send_bit(0); // ERROR
+ send_bit(0); // ERROR
+ send_bit(0); // ERROR
+ send_bit(1); // ERROR DELIM
+ send_bit(1); // ERROR DELIM
+ send_bit(1); // ERROR DELIM
+ send_bit(1); // ERROR DELIM
+ send_bit(1); // ERROR DELIM
+ send_bit(1); // ERROR DELIM
+ send_bit(1); // ERROR DELIM
+ send_bit(1); // ERROR DELIM
+ send_bit(1); // INTER
+ send_bit(1); // INTER
+ send_bit(1); // INTER
+ end // repeat
+
+ // Node is error passive now.
+
+ // Read irq register (error interrupt should be cleared now.
+ read_register(8'd3);
+
+ repeat (20)
+
+ begin
+ send_bit(0); // SOF
+ send_bit(1); // ID
+ send_bit(1); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(0); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(1); // RTR
+ send_bit(0); // IDE
+ send_bit(0); // r0
+ send_bit(0); // DLC
+ send_bit(1); // DLC
+ send_bit(1); // DLC
+ send_bit(1); // DLC
+ send_bit(1); // CRC
+ send_bit(0); // CRC
+ send_bit(0); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(0); // CRC
+ send_bit(1); // CRC
+ send_bit(0); // CRC
+ send_bit(0); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC DELIM
+ send_bit(1); // ACK ack error
+ send_bit(0); // ERROR
+ send_bit(0); // ERROR
+ send_bit(0); // ERROR
+ send_bit(0); // ERROR
+ send_bit(0); // ERROR
+ send_bit(0); // ERROR
+ send_bit(1); // ERROR DELIM
+ send_bit(1); // ERROR DELIM
+ send_bit(1); // ERROR DELIM
+ send_bit(1); // ERROR DELIM
+ send_bit(1); // ERROR DELIM
+ send_bit(1); // ERROR DELIM
+ send_bit(1); // ERROR DELIM
+ send_bit(1); // ERROR DELIM
+ send_bit(1); // INTER
+ send_bit(1); // INTER
+ send_bit(1); // INTER
+ send_bit(1); // SUSPEND
+ send_bit(1); // SUSPEND
+ send_bit(1); // SUSPEND
+ send_bit(1); // SUSPEND
+ send_bit(1); // SUSPEND
+ send_bit(1); // SUSPEND
+ send_bit(1); // SUSPEND
+ send_bit(1); // SUSPEND
+ end // repeat
+
+ // Node is bus-off now
+
+
+ // Read irq register (error interrupt should be cleared now.
+ read_register(8'd3);
+
+
+
+ #100000;
+
+ // Switch-off reset mode
+ write_register(8'd0, {7'h0, ~(`CAN_MODE_RESET)});
+
+ repeat (64 * 11)
+ begin
+ send_bit(1);
+ end // repeat
+
+ // Read irq register (error interrupt should be cleared now.
+ read_register(8'd3);
+
+ repeat (64 * 11)
+ begin
+ send_bit(1);
+ end // repeat
+
+
+
+ // Read irq register (error interrupt should be cleared now.
+ read_register(8'd3);
+
+ end
+
+
+
+ join
+
+
+
+ fork
+ begin
+ tx_request_command;
+ end
+
+ begin
+ #1100;
+
+ send_bit(1); // To spend some time before transmitter is ready.
+
+ repeat (1)
+ begin
+ send_bit(0); // SOF
+ send_bit(1); // ID
+ send_bit(1); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(0); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(0); // ID
+ send_bit(1); // ID
+ send_bit(1); // RTR
+ send_bit(0); // IDE
+ send_bit(0); // r0
+ send_bit(0); // DLC
+ send_bit(1); // DLC
+ send_bit(1); // DLC
+ send_bit(1); // DLC
+ send_bit(1); // CRC
+ send_bit(0); // CRC
+ send_bit(0); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(0); // CRC
+ send_bit(1); // CRC
+ send_bit(0); // CRC
+ send_bit(0); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC
+ send_bit(1); // CRC DELIM
+ send_bit(0); // ACK
+ send_bit(1); // ACK DELIM
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // EOF
+ send_bit(1); // INTER
+ send_bit(1); // INTER
+ send_bit(1); // INTER
+ end // repeat
+ end
+
+ join
+
+ read_receive_buffer;
+ release_rx_buffer_command;
+ read_receive_buffer;
+ release_rx_buffer_command;
+ read_receive_buffer;
+
+ #4000000;
+
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h1, 15'h30bb); // mode, rtr, id, length, crc
+
+ #1000000;
+
+ end
+endtask // bus_off_test
+
+
+
+task send_frame_basic; // CAN IP core sends frames
+ begin
+
+ write_register(8'd10, 8'hea); // Writing ID[10:3] = 0xea
+ write_register(8'd11, 8'h28); // Writing ID[2:0] = 0x1, rtr = 0, length = 8
+ write_register(8'd12, 8'h56); // data byte 1
+ write_register(8'd13, 8'h78); // data byte 2
+ write_register(8'd14, 8'h9a); // data byte 3
+ write_register(8'd15, 8'hbc); // data byte 4
+ write_register(8'd16, 8'hde); // data byte 5
+ write_register(8'd17, 8'hf0); // data byte 6
+ write_register(8'd18, 8'h0f); // data byte 7
+ write_register(8'd19, 8'hed); // data byte 8
+
+
+ // Enable irqs (basic mode)
+ write_register(8'd0, 8'h1e);
+
+
+
+ fork
+
+ begin
+ #1100;
+ $display("\n\nStart receiving data from CAN bus");
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h1, 15'h30bb); // mode, rtr, id, length, crc
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h2, 15'h2da1); // mode, rtr, id, length, crc
+ receive_frame(0, 0, {26'h00000ee, 3'h1}, 4'h0, 15'h6cea); // mode, rtr, id, length, crc
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h2, 15'h2da1); // mode, rtr, id, length, crc
+ receive_frame(0, 0, {26'h00000ee, 3'h1}, 4'h1, 15'h00c5); // mode, rtr, id, length, crc
+ receive_frame(0, 0, {26'h00000ee, 3'h1}, 4'h2, 15'h7b4a); // mode, rtr, id, length, crc
+ end
+
+ begin
+ tx_request_command;
+ end
+
+ begin
+ wait (can_testbench.i_can_top.i_can_bsp.go_tx) // waiting for tx to start
+ wait (~can_testbench.i_can_top.i_can_bsp.need_to_tx) // waiting for tx to finish
+ tx_request_command; // start another tx
+ end
+
+ begin
+ // Transmitting acknowledge (for first packet)
+ wait (can_testbench.i_can_top.i_can_bsp.tx_state & can_testbench.i_can_top.i_can_bsp.rx_ack & can_testbench.i_can_top.i_can_bsp.tx_point);
+ #1 rx = 0;
+ wait (can_testbench.i_can_top.i_can_bsp.rx_ack_lim & can_testbench.i_can_top.i_can_bsp.tx_point);
+ #1 rx = 1;
+
+ // Transmitting acknowledge (for second packet)
+ wait (can_testbench.i_can_top.i_can_bsp.tx_state & can_testbench.i_can_top.i_can_bsp.rx_ack & can_testbench.i_can_top.i_can_bsp.tx_point);
+ #1 rx = 0;
+ wait (can_testbench.i_can_top.i_can_bsp.rx_ack_lim & can_testbench.i_can_top.i_can_bsp.tx_point);
+ #1 rx = 1;
+ end
+
+
+ join
+
+ read_receive_buffer;
+ release_rx_buffer_command;
+ release_rx_buffer_command;
+ read_receive_buffer;
+ release_rx_buffer_command;
+ read_receive_buffer;
+
+ #200000;
+
+ read_receive_buffer;
+
+ // Read irq register
+ read_register(8'd3);
+ #1000;
+
+ end
+endtask // send_frame_basic
+
+
+
+task send_frame_extended; // CAN IP core sends basic or extended frames in extended mode
+ begin
+
+ // Switch-on reset mode
+ write_register(8'd0, {7'h0, (`CAN_MODE_RESET)});
+
+ // Set Clock Divider register
+ extended_mode = 1'b1;
+ write_register(8'd31, {extended_mode, 7'h0}); // Setting the extended mode
+
+ // Set Acceptance Code and Acceptance Mask registers
+ write_register(8'd16, 8'ha6); // acceptance code 0
+ write_register(8'd17, 8'hb0); // acceptance code 1
+ write_register(8'd18, 8'h12); // acceptance code 2
+ write_register(8'd19, 8'h30); // acceptance code 3
+ write_register(8'd20, 8'h00); // acceptance mask 0
+ write_register(8'd21, 8'h00); // acceptance mask 1
+ write_register(8'd22, 8'h00); // acceptance mask 2
+ write_register(8'd23, 8'h00); // acceptance mask 3
+
+ // Switch-off reset mode
+ write_register(8'd0, {7'h0, ~(`CAN_MODE_RESET)});
+
+ // After exiting the reset mode sending bus free
+ repeat (11) send_bit(1);
+
+
+/* Basic frame format
+ // Writing TX frame information + identifier + data
+ write_register(8'd16, 8'h45); // Frame format = 0, Remote transmision request = 1, DLC = 5
+ write_register(8'd17, 8'ha6); // ID[28:21] = a6
+ write_register(8'd18, 8'ha0); // ID[20:18] = 5
+ // write_register(8'd19, 8'h78); RTR does not send any data
+ // write_register(8'd20, 8'h9a);
+ // write_register(8'd21, 8'hbc);
+ // write_register(8'd22, 8'hde);
+ // write_register(8'd23, 8'hf0);
+ // write_register(8'd24, 8'h0f);
+ // write_register(8'd25, 8'hed);
+ // write_register(8'd26, 8'hcb);
+ // write_register(8'd27, 8'ha9);
+ // write_register(8'd28, 8'h87);
+*/
+
+ // Extended frame format
+ // Writing TX frame information + identifier + data
+ write_register(8'd16, 8'hc5); // Frame format = 1, Remote transmision request = 1, DLC = 5
+ write_register(8'd17, 8'ha6); // ID[28:21] = a6
+ write_register(8'd18, 8'h00); // ID[20:13] = 00
+ write_register(8'd19, 8'h5a); // ID[12:5] = 5a
+ write_register(8'd20, 8'ha8); // ID[4:0] = 15
+ // write_register(8'd21, 8'h78); RTR does not send any data
+ // write_register(8'd22, 8'h9a);
+ // write_register(8'd23, 8'hbc);
+ // write_register(8'd24, 8'hde);
+ // write_register(8'd25, 8'hf0);
+ // write_register(8'd26, 8'h0f);
+ // write_register(8'd27, 8'hed);
+ // write_register(8'd28, 8'hcb);
+
+
+ // Enabling IRQ's (extended mode)
+ write_register(8'd4, 8'hff);
+
+
+ fork
+ begin
+ #2700;
+ $display("\n\nStart receiving data from CAN bus");
+ /* Standard frame format
+ receive_frame(0, 0, {26'h00000a0, 3'h1}, 4'h1, 15'h2d9c); // mode, rtr, id, length, crc
+ receive_frame(0, 0, {26'h00000a0, 3'h1}, 4'h2, 15'h46b4); // mode, rtr, id, length, crc
+ receive_frame(0, 0, {26'h00000af, 3'h1}, 4'h0, 15'h42cd); // mode, rtr, id, length, crc
+ receive_frame(0, 0, {26'h00000af, 3'h1}, 4'h1, 15'h555f); // mode, rtr, id, length, crc
+ receive_frame(0, 0, {26'h00000af, 3'h1}, 4'h2, 15'h6742); // mode, rtr, id, length, crc
+ */
+
+ // Extended frame format
+ receive_frame(1, 0, {8'ha6, 8'h00, 8'h5a, 5'h15}, 4'h1, 15'h2d22); // mode, rtr, id, length, crc
+ receive_frame(1, 0, {8'ha6, 8'h00, 8'h5a, 5'h15}, 4'h2, 15'h3d2d); // mode, rtr, id, length, crc
+ receive_frame(1, 0, {8'ha6, 8'h00, 8'h5a, 5'h15}, 4'h0, 15'h23aa); // mode, rtr, id, length, crc
+ receive_frame(1, 0, {8'ha6, 8'h00, 8'h5a, 5'h15}, 4'h1, 15'h2d22); // mode, rtr, id, length, crc
+ receive_frame(1, 0, {8'ha6, 8'h00, 8'h5a, 5'h15}, 4'h2, 15'h3d2d); // mode, rtr, id, length, crc
+
+ end
+
+ begin
+ tx_request_command;
+ end
+
+ begin
+ // Transmitting acknowledge
+ wait (can_testbench.i_can_top.i_can_bsp.tx_state & can_testbench.i_can_top.i_can_bsp.rx_ack & can_testbench.i_can_top.i_can_bsp.tx_point);
+ #1 rx = 0;
+ wait (can_testbench.i_can_top.i_can_bsp.rx_ack_lim & can_testbench.i_can_top.i_can_bsp.tx_point);
+ #1 rx = 1;
+ end
+
+ begin // Reading irq and arbitration lost capture register
+
+ repeat(1)
+ begin
+ while (~(can_testbench.i_can_top.i_can_bsp.rx_crc_lim & can_testbench.i_can_top.i_can_bsp.sample_point))
+ begin
+ @ (posedge clk);
+ end
+
+ // Read irq register
+ #1 read_register(8'd3);
+
+ // Read arbitration lost capture register
+ read_register(8'd11);
+ end
+
+
+ repeat(1)
+ begin
+ while (~(can_testbench.i_can_top.i_can_bsp.rx_crc_lim & can_testbench.i_can_top.i_can_bsp.sample_point))
+ begin
+ @ (posedge clk);
+ end
+
+ // Read irq register
+ #1 read_register(8'd3);
+ end
+
+ repeat(1)
+ begin
+ while (~(can_testbench.i_can_top.i_can_bsp.rx_crc_lim & can_testbench.i_can_top.i_can_bsp.sample_point))
+ begin
+ @ (posedge clk);
+ end
+
+ // Read arbitration lost capture register
+ read_register(8'd11);
+ end
+
+ end
+
+ join
+
+ read_receive_buffer;
+ release_rx_buffer_command;
+ release_rx_buffer_command;
+ read_receive_buffer;
+ release_rx_buffer_command;
+ read_receive_buffer;
+ release_rx_buffer_command;
+ read_receive_buffer;
+ release_rx_buffer_command;
+ read_receive_buffer;
+
+ #200000;
+
+ read_receive_buffer;
+
+ // Read irq register
+ read_register(8'd3);
+ #1000;
+
+ end
+endtask // send_frame_extended
+
+
+
+task self_reception_request; // CAN IP core sends sets self reception mode and transmits a msg. This test runs in EXTENDED mode
+ begin
+
+ // Switch-on reset mode
+ write_register(8'd0, {7'h0, (`CAN_MODE_RESET)});
+
+ // Set Clock Divider register
+ extended_mode = 1'b1;
+ write_register(8'd31, {extended_mode, 7'h0}); // Setting the extended mode
+
+ // Set Acceptance Code and Acceptance Mask registers
+ write_register(8'd16, 8'ha6); // acceptance code 0
+ write_register(8'd17, 8'hb0); // acceptance code 1
+ write_register(8'd18, 8'h12); // acceptance code 2
+ write_register(8'd19, 8'h30); // acceptance code 3
+ write_register(8'd20, 8'h00); // acceptance mask 0
+ write_register(8'd21, 8'h00); // acceptance mask 1
+ write_register(8'd22, 8'h00); // acceptance mask 2
+ write_register(8'd23, 8'h00); // acceptance mask 3
+
+ // Setting the "self test mode"
+ write_register(8'd0, 8'h4);
+
+ // Switch-off reset mode
+ write_register(8'd0, {7'h0, ~(`CAN_MODE_RESET)});
+
+ // After exiting the reset mode sending bus free
+ repeat (11) send_bit(1);
+
+
+ // Writing TX frame information + identifier + data
+ write_register(8'd16, 8'h45); // Frame format = 0, Remote transmision request = 1, DLC = 5
+ write_register(8'd17, 8'ha6); // ID[28:21] = a6
+ write_register(8'd18, 8'ha0); // ID[20:18] = 5
+ // write_register(8'd19, 8'h78); RTR does not send any data
+ // write_register(8'd20, 8'h9a);
+ // write_register(8'd21, 8'hbc);
+ // write_register(8'd22, 8'hde);
+ // write_register(8'd23, 8'hf0);
+ // write_register(8'd24, 8'h0f);
+ // write_register(8'd25, 8'hed);
+ // write_register(8'd26, 8'hcb);
+ // write_register(8'd27, 8'ha9);
+ // write_register(8'd28, 8'h87);
+
+
+ // Enabling IRQ's (extended mode)
+ write_register(8'd4, 8'hff);
+
+ self_reception_request_command;
+
+ #400000;
+
+ read_receive_buffer;
+ release_rx_buffer_command;
+ release_rx_buffer_command;
+ read_receive_buffer;
+ release_rx_buffer_command;
+ read_receive_buffer;
+ release_rx_buffer_command;
+ read_receive_buffer;
+ release_rx_buffer_command;
+ read_receive_buffer;
+
+
+ read_receive_buffer;
+
+ // Read irq register
+ read_register(8'd3);
+ #1000;
+
+ end
+endtask // self_reception_request
+
+
+
+task test_empty_fifo;
+ begin
+
+ // Enable irqs (basic mode)
+ write_register(8'd0, 8'h1e);
+
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h3, 15'h56a9); // mode, rtr, id, length, crc
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h7, 15'h391d); // mode, rtr, id, length, crc
+
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ $display("\n\n");
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ $display("\n\n");
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ $display("\n\n");
+ read_receive_buffer;
+ fifo_info;
+
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h8, 15'h70e0); // mode, rtr, id, length, crc
+
+ $display("\n\n");
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ $display("\n\n");
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ $display("\n\n");
+ read_receive_buffer;
+ fifo_info;
+ end
+endtask
+
+
+
+task test_empty_fifo_ext;
+ begin
+ receive_frame(1, 0, 29'h14d60246, 4'h3, 15'h5262); // mode, rtr, id, length, crc
+ receive_frame(1, 0, 29'h14d60246, 4'h7, 15'h1730); // mode, rtr, id, length, crc
+
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ $display("\n\n");
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ $display("\n\n");
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ $display("\n\n");
+ read_receive_buffer;
+ fifo_info;
+
+ receive_frame(1, 0, 29'h14d60246, 4'h8, 15'h2f7a); // mode, rtr, id, length, crc
+
+ $display("\n\n");
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ $display("\n\n");
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ $display("\n\n");
+ read_receive_buffer;
+ fifo_info;
+ end
+endtask
+
+
+
+task test_full_fifo;
+ begin
+
+ // Enable irqs (basic mode)
+ write_register(8'd0, 8'h1e);
+
+ $display("\n\n");
+
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h0, 15'h2372); // mode, rtr, id, length, crc
+ fifo_info;
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h1, 15'h30bb); // mode, rtr, id, length, crc
+ fifo_info;
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h2, 15'h2da1); // mode, rtr, id, length, crc
+ fifo_info;
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h3, 15'h56a9); // mode, rtr, id, length, crc
+ fifo_info;
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h4, 15'h3124); // mode, rtr, id, length, crc
+ fifo_info;
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h5, 15'h6944); // mode, rtr, id, length, crc
+ fifo_info;
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h6, 15'h5182); // mode, rtr, id, length, crc
+ fifo_info;
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h7, 15'h391d); // mode, rtr, id, length, crc
+ fifo_info;
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h8, 15'h70e0); // mode, rtr, id, length, crc
+ fifo_info;
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h8, 15'h70e0); // mode, rtr, id, length, crc
+ fifo_info;
+ $display("FIFO should be full now");
+
+ // Following one is accepted with overrun
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h8, 15'h70e0); // mode, rtr, id, length, crc
+ fifo_info;
+
+ release_rx_buffer_command;
+ fifo_info;
+
+ // Space just enough for the following frame.
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h0, 15'h2372); // mode, rtr, id, length, crc
+ fifo_info;
+
+ // Following accepted with overrun
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h8, 15'h70e0); // mode, rtr, id, length, crc
+ fifo_info;
+// read_overrun_info(0, 15);
+
+ release_rx_buffer_command;
+ release_rx_buffer_command;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+ receive_frame(0, 0, {26'h00000e8, 3'h1}, 4'h8, 15'h70e0); // mode, rtr, id, length, crc
+ fifo_info;
+// read_overrun_info(0, 15);
+ $display("\n\n");
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ clear_data_overrun_command;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ clear_data_overrun_command;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ // Read irq register
+ read_register(8'd3);
+
+ // Read irq register
+ read_register(8'd3);
+ #1000;
+
+ end
+endtask
+
+
+
+task test_full_fifo_ext;
+ begin
+ release_rx_buffer_command;
+ $display("\n\n");
+ read_receive_buffer;
+ fifo_info;
+
+ receive_frame(1, 0, 29'h14d60246, 4'h0, 15'h6f54); // mode, rtr, id, length, crc
+ read_receive_buffer;
+ fifo_info;
+ receive_frame(1, 0, 29'h14d60246, 4'h1, 15'h6d38); // mode, rtr, id, length, crc
+ read_receive_buffer;
+ fifo_info;
+ receive_frame(1, 0, 29'h14d60246, 4'h2, 15'h053e); // mode, rtr, id, length, crc
+ fifo_info;
+ read_receive_buffer;
+ receive_frame(1, 0, 29'h14d60246, 4'h3, 15'h5262); // mode, rtr, id, length, crc
+ fifo_info;
+ receive_frame(1, 0, 29'h14d60246, 4'h4, 15'h4bba); // mode, rtr, id, length, crc
+ fifo_info;
+ receive_frame(1, 0, 29'h14d60246, 4'h5, 15'h4d7d); // mode, rtr, id, length, crc
+ fifo_info;
+ receive_frame(1, 0, 29'h14d60246, 4'h6, 15'h6f40); // mode, rtr, id, length, crc
+ fifo_info;
+ receive_frame(1, 0, 29'h14d60246, 4'h7, 15'h1730); // mode, rtr, id, length, crc
+ fifo_info;
+// read_overrun_info(0, 10);
+
+ release_rx_buffer_command;
+ release_rx_buffer_command;
+ fifo_info;
+ receive_frame(1, 0, 29'h14d60246, 4'h8, 15'h2f7a); // mode, rtr, id, length, crc
+ fifo_info;
+// read_overrun_info(0, 15);
+ $display("\n\n");
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ release_rx_buffer_command;
+ read_receive_buffer;
+ fifo_info;
+
+ end
+endtask
+
+
+/*
+task initialize_fifo;
+ integer i;
+ begin
+ for (i=0; i<32; i=i+1)
+ begin
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.length_info[i] = 0;
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.overrun_info[i] = 0;
+ end
+
+ for (i=0; i<64; i=i+1)
+ begin
+ can_testbench.i_can_top.i_can_bsp.i_can_fifo.fifo[i] = 0;
+ end
+
+ $display("(%0t) Fifo initialized", $time);
+ end
+endtask
+*/
+/*
+task read_overrun_info;
+ input [4:0] start_addr;
+ input [4:0] end_addr;
+ integer i;
+ begin
+ for (i=start_addr; i<=end_addr; i=i+1)
+ begin
+ $display("len[0x%0x]=0x%0x", i, can_testbench.i_can_top.i_can_bsp.i_can_fifo.length_info[i]);
+ $display("overrun[0x%0x]=0x%0x\n", i, can_testbench.i_can_top.i_can_bsp.i_can_fifo.overrun_info[i]);
+ end
+ end
+endtask
+*/
+
+task fifo_info; // Displaying how many packets and how many bytes are in fifo. Not working when wr_info_pointer is smaller than rd_info_pointer.
+ begin
+ $display("(%0t) Currently %0d bytes in fifo (%0d packets)", $time, can_testbench.i_can_top.i_can_bsp.i_can_fifo.fifo_cnt,
+ (can_testbench.i_can_top.i_can_bsp.i_can_fifo.wr_info_pointer - can_testbench.i_can_top.i_can_bsp.i_can_fifo.rd_info_pointer));
+end
+endtask
+
+
+task read_register;
+ input [7:0] reg_addr;
+
+ `ifdef CAN_WISHBONE_IF
+ begin
+ wait (wb_free);
+ wb_free = 0;
+ @ (posedge wb_clk_i);
+ #1;
+ cs_can = 1;
+ wb_adr_i = reg_addr;
+ wb_cyc_i = 1;
+ wb_stb_i = 1;
+ wb_we_i = 0;
+ wait (wb_ack_o);
+ $display("(%0t) Reading register [%0d] = 0x%0x", $time, wb_adr_i, wb_dat_o);
+ @ (posedge wb_clk_i);
+ #1;
+ wb_adr_i = 'hz;
+ wb_cyc_i = 0;
+ wb_stb_i = 0;
+ wb_we_i = 'hz;
+ cs_can = 0;
+ wb_free = 1;
+ end
+ `else
+ begin
+ wait (port_free);
+ port_free = 0;
+ @ (posedge clk);
+ #1;
+ cs_can = 1;
+ @ (negedge clk);
+ #1;
+ ale_i = 1;
+ port_0_en = 1;
+ port_0_o = reg_addr;
+ @ (negedge clk);
+ #1;
+ ale_i = 0;
+ #90; // 73 - 103 ns
+ port_0_en = 0;
+ rd_i = 1;
+ #158;
+ $display("(%0t) Reading register [%0d] = 0x%0x", $time, can_testbench.i_can_top.addr_latched, port_0_i);
+ #1;
+ rd_i = 0;
+ cs_can = 0;
+ port_free = 1;
+ end
+ `endif
+endtask
+
+
+task write_register;
+ input [7:0] reg_addr;
+ input [7:0] reg_data;
+
+ `ifdef CAN_WISHBONE_IF
+ begin
+ wait (wb_free);
+ wb_free = 0;
+ @ (posedge wb_clk_i);
+ #1;
+ cs_can = 1;
+ wb_adr_i = reg_addr;
+ wb_dat_i = reg_data;
+ wb_cyc_i = 1;
+ wb_stb_i = 1;
+ wb_we_i = 1;
+ wait (wb_ack_o);
+ @ (posedge wb_clk_i);
+ #1;
+ wb_adr_i = 'hz;
+ wb_dat_i = 'hz;
+ wb_cyc_i = 0;
+ wb_stb_i = 0;
+ wb_we_i = 'hz;
+ cs_can = 0;
+ wb_free = 1;
+ end
+ `else
+ begin
+ wait (port_free);
+ port_free = 0;
+ @ (posedge clk);
+ #1;
+ cs_can = 1;
+ @ (negedge clk);
+ #1;
+ ale_i = 1;
+ port_0_en = 1;
+ port_0_o = reg_addr;
+ @ (negedge clk);
+ #1;
+ ale_i = 0;
+ #90; // 73 - 103 ns
+ port_0_o = reg_data;
+ wr_i = 1;
+ #158;
+ wr_i = 0;
+ port_0_en = 0;
+ cs_can = 0;
+ port_free = 1;
+ end
+ `endif
+endtask
+
+
+task read_receive_buffer;
+ integer i;
+ begin
+ $display("\n\n(%0t)", $time);
+ if(extended_mode) // Extended mode
+ begin
+ for (i=8'd16; i<=8'd28; i=i+1)
+ read_register(i);
+ if (can_testbench.i_can_top.i_can_bsp.i_can_fifo.overrun)
+ $display("\nWARNING: Above packet was received with overrun.");
+ end
+ else
+ begin
+ for (i=8'd20; i<=8'd29; i=i+1)
+ read_register(i);
+ if (can_testbench.i_can_top.i_can_bsp.i_can_fifo.overrun)
+ $display("\nWARNING: Above packet was received with overrun.");
+ end
+ end
+endtask
+
+
+task release_rx_buffer_command;
+ begin
+ write_register(8'd1, 8'h4);
+ $display("(%0t) Rx buffer released.", $time);
+ end
+endtask
+
+
+task tx_request_command;
+ begin
+ write_register(8'd1, 8'h1);
+ $display("(%0t) Tx requested.", $time);
+ end
+endtask
+
+
+task tx_abort_command;
+ begin
+ write_register(8'd1, 8'h2);
+ $display("(%0t) Tx abort requested.", $time);
+ end
+endtask
+
+
+task clear_data_overrun_command;
+ begin
+ write_register(8'd1, 8'h8);
+ $display("(%0t) Data overrun cleared.", $time);
+ end
+endtask
+
+
+task self_reception_request_command;
+ begin
+ write_register(8'd1, 8'h10);
+ $display("(%0t) Self reception requested.", $time);
+ end
+endtask
+
+
+task test_synchronization;
+ begin
+ // Hard synchronization
+ #1 rx=0;
+ repeat (2*BRP) @ (posedge clk);
+ repeat (8*BRP) @ (posedge clk);
+ #1 rx=1;
+ repeat (10*BRP) @ (posedge clk);
+
+ // Resynchronization on time
+ #1 rx=0;
+ repeat (10*BRP) @ (posedge clk);
+ #1 rx=1;
+ repeat (10*BRP) @ (posedge clk);
+
+ // Resynchronization late
+ repeat (BRP) @ (posedge clk);
+ repeat (BRP) @ (posedge clk);
+ #1 rx=0;
+ repeat (10*BRP) @ (posedge clk);
+ #1 rx=1;
+
+ // Resynchronization early
+ repeat (8*BRP) @ (posedge clk); // two frames too early
+ #1 rx=0;
+ repeat (10*BRP) @ (posedge clk);
+ #1 rx=1;
+ // Resynchronization early
+ repeat (11*BRP) @ (posedge clk); // one frames too late
+ #1 rx=0;
+ repeat (10*BRP) @ (posedge clk);
+ #1 rx=1;
+
+ repeat (10*BRP) @ (posedge clk);
+ #1 rx=0;
+ repeat (10*BRP) @ (posedge clk);
+ end
+endtask
+
+
+task send_bit;
+ input bit;
+ integer cnt;
+ begin
+ #1 rx=bit;
+ repeat ((`CAN_TIMING1_TSEG1 + `CAN_TIMING1_TSEG2 + 3)*BRP) @ (posedge clk);
+ end
+endtask
+
+
+task receive_frame; // CAN IP core receives frames
+ input mode;
+ input remote_trans_req;
+ input [28:0] id;
+ input [3:0] length;
+ input [14:0] crc;
+
+ reg [117:0] data;
+ reg previous_bit;
+ reg stuff;
+ reg tmp;
+ reg arbitration_lost;
+ integer pointer;
+ integer cnt;
+ integer total_bits;
+ integer stuff_cnt;
+
+ begin
+
+ stuff_cnt = 1;
+ stuff = 0;
+
+ if(mode) // Extended format
+ data = {id[28:18], 1'b1, 1'b1, id[17:0], remote_trans_req, 2'h0, length};
+ else // Standard format
+ data = {id[10:0], remote_trans_req, 1'b0, 1'b0, length};
+
+ if (~remote_trans_req)
+ begin
+ if(length) // Send data if length is > 0
+ begin
+ for (cnt=1; cnt<=(2*length); cnt=cnt+1) // data (we are sending nibbles)
+ data = {data[113:0], cnt[3:0]};
+ end
+ end
+
+ // Adding CRC
+ data = {data[104:0], crc[14:0]};
+
+
+ // Calculating pointer that points to the bit that will be send
+ if (remote_trans_req)
+ begin
+ if(mode) // Extended format
+ pointer = 52;
+ else // Standard format
+ pointer = 32;
+ end
+ else
+ begin
+ if(mode) // Extended format
+ pointer = 52 + 8 * length;
+ else // Standard format
+ pointer = 32 + 8 * length;
+ end
+
+ // This is how many bits we need to shift
+ total_bits = pointer;
+
+ // Waiting until previous msg is finished before sending another one
+ if (arbitration_lost) // Arbitration lost. Another node is transmitting. We have to wait until it is finished.
+ wait ( (~can_testbench.i_can_top.i_can_bsp.error_frame) &
+ (~can_testbench.i_can_top.i_can_bsp.rx_inter ) &
+ (~can_testbench.i_can_top.i_can_bsp.tx_state )
+ );
+ else // We were transmitter of the previous frame. No need to wait for another node to finish transmission.
+ wait ( (~can_testbench.i_can_top.i_can_bsp.error_frame) &
+ (~can_testbench.i_can_top.i_can_bsp.rx_inter )
+ );
+ arbitration_lost = 0;
+
+ send_bit(0); // SOF
+ previous_bit = 0;
+
+ fork
+
+ begin
+ for (cnt=0; cnt<=total_bits; cnt=cnt+1)
+ begin
+ if (stuff_cnt == 5)
+ begin
+ stuff_cnt = 1;
+ total_bits = total_bits + 1;
+ stuff = 1;
+ tmp = ~data[pointer+1];
+ send_bit(~data[pointer+1]);
+ previous_bit = ~data[pointer+1];
+ end
+ else
+ begin
+ if (data[pointer] == previous_bit)
+ stuff_cnt <= stuff_cnt + 1;
+ else
+ stuff_cnt <= 1;
+
+ stuff = 0;
+ tmp = data[pointer];
+ send_bit(data[pointer]);
+ previous_bit = data[pointer];
+ pointer = pointer - 1;
+ end
+ if (arbitration_lost)
+ cnt=total_bits+1; // Exit the for loop
+ end
+
+ // Nothing send after the data (just recessive bit)
+ repeat (13) send_bit(1); // CRC delimiter + ack + ack delimiter + EOF + intermission= 1 + 1 + 1 + 7 + 3
+ end
+
+ begin
+ while (mode ? (cnt<32) : (cnt<12))
+ begin
+ #1 wait (can_testbench.i_can_top.sample_point);
+ if (mode)
+ begin
+ if (cnt<32 & tmp & (~rx_and_tx))
+ begin
+ arbitration_lost = 1;
+ rx = 1; // Only recessive is send from now on.
+ end
+ end
+ else
+ begin
+ if (cnt<12 & tmp & (~rx_and_tx))
+ begin
+ arbitration_lost = 1;
+ rx = 1; // Only recessive is send from now on.
+ end
+ end
+ end
+ end
+
+ join
+
+ end
+endtask
+
+
+
+// State machine monitor (btl)
+always @ (posedge clk)
+begin
+ if(can_testbench.i_can_top.i_can_btl.go_sync & can_testbench.i_can_top.i_can_btl.go_seg1 | can_testbench.i_can_top.i_can_btl.go_sync & can_testbench.i_can_top.i_can_btl.go_seg2 |
+ can_testbench.i_can_top.i_can_btl.go_seg1 & can_testbench.i_can_top.i_can_btl.go_seg2)
+ begin
+ $display("(%0t) ERROR multiple go_sync, go_seg1 or go_seg2 occurance\n\n", $time);
+ #1000;
+ $stop;
+ end
+
+ if(can_testbench.i_can_top.i_can_btl.sync & can_testbench.i_can_top.i_can_btl.seg1 | can_testbench.i_can_top.i_can_btl.sync & can_testbench.i_can_top.i_can_btl.seg2 |
+ can_testbench.i_can_top.i_can_btl.seg1 & can_testbench.i_can_top.i_can_btl.seg2)
+ begin
+ $display("(%0t) ERROR multiple sync, seg1 or seg2 occurance\n\n", $time);
+ #1000;
+ $stop;
+ end
+end
+
+/* stuff_error monitor (bsp)
+always @ (posedge clk)
+begin
+ if(can_testbench.i_can_top.i_can_bsp.stuff_error)
+ begin
+ $display("\n\n(%0t) Stuff error occured in can_bsp.v file\n\n", $time);
+ $stop; After everything is finished add another condition (something like & (~idle)) and enable stop
+ end
+end
+*/
+
+//
+// CRC monitor (used until proper CRC generation is used in testbench
+always @ (posedge clk)
+begin
+ if (can_testbench.i_can_top.i_can_bsp.rx_ack &
+ can_testbench.i_can_top.i_can_bsp.sample_point &
+ can_testbench.i_can_top.i_can_bsp.crc_err
+ )
+ $display("*E (%0t) ERROR: CRC error (Calculated crc = 0x%0x, crc_in = 0x%0x)", $time, can_testbench.i_can_top.i_can_bsp.calculated_crc, can_testbench.i_can_top.i_can_bsp.crc_in);
+end
+
+
+
+
+
+/*
+// overrun monitor
+always @ (posedge clk)
+begin
+ if (can_testbench.i_can_top.i_can_bsp.i_can_fifo.wr & can_testbench.i_can_top.i_can_bsp.i_can_fifo.fifo_full)
+ $display("(%0t)overrun", $time);
+end
+*/
+
+
+// form error monitor
+always @ (posedge clk)
+begin
+ if (can_testbench.i_can_top.i_can_bsp.form_err)
+ $display("*E (%0t) ERROR: form_error", $time);
+end
+
+
+
+// acknowledge error monitor
+always @ (posedge clk)
+begin
+ if (can_testbench.i_can_top.i_can_bsp.ack_err)
+ $display("*E (%0t) ERROR: acknowledge_error", $time);
+end
+
+/*
+// bit error monitor
+always @ (posedge clk)
+begin
+ if (can_testbench.i_can_top.i_can_bsp.bit_err)
+ $display("*E (%0t) ERROR: bit_error", $time);
+end
+*/
+
+endmodule
+
Index: tags/rel_22/bench/verilog/can_testbench_defines.v
===================================================================
--- tags/rel_22/bench/verilog/can_testbench_defines.v (nonexistent)
+++ tags/rel_22/bench/verilog/can_testbench_defines.v (revision 146)
@@ -0,0 +1,94 @@
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// can_testbench_defines.v ////
+//// ////
+//// ////
+//// This file is part of the CAN Protocol Controller ////
+//// http://www.opencores.org/projects/can/ ////
+//// ////
+//// ////
+//// Author(s): ////
+//// Igor Mohor ////
+//// igorm@opencores.org ////
+//// ////
+//// ////
+//// All additional information is available in the README.txt ////
+//// file. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// Copyright (C) 2002, 2003 Authors ////
+//// ////
+//// This source file may be used and distributed without ////
+//// restriction provided that this copyright statement is not ////
+//// removed from the file and that any derivative work contains ////
+//// the original copyright notice and the associated disclaimer. ////
+//// ////
+//// This source file is free software; you can redistribute it ////
+//// and/or modify it under the terms of the GNU Lesser General ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any ////
+//// later version. ////
+//// ////
+//// This source is distributed in the hope that it will be ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
+//// PURPOSE. See the GNU Lesser General Public License for more ////
+//// details. ////
+//// ////
+//// You should have received a copy of the GNU Lesser General ////
+//// Public License along with this source; if not, download it ////
+//// from http://www.opencores.org/lgpl.shtml ////
+//// ////
+//// The CAN protocol is developed by Robert Bosch GmbH and ////
+//// protected by patents. Anybody who wants to implement this ////
+//// CAN IP core on silicon has to obtain a CAN protocol license ////
+//// from Bosch. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//
+// CVS Revision History
+//
+// $Log: not supported by cvs2svn $
+// Revision 1.8 2003/02/18 00:17:44 mohor
+// Define CAN_CLOCK_DIVIDER_MODE not used any more. Deleted.
+//
+// Revision 1.7 2003/02/09 02:24:11 mohor
+// Bosch license warning added. Error counters finished. Overload frames
+// still need to be fixed.
+//
+// Revision 1.6 2003/01/14 12:19:29 mohor
+// rx_fifo is now working.
+//
+// Revision 1.5 2003/01/09 14:46:52 mohor
+// Temporary files (backup).
+//
+// Revision 1.4 2003/01/08 02:09:44 mohor
+// Acceptance filter added.
+//
+// Revision 1.3 2002/12/28 04:13:53 mohor
+// Backup version.
+//
+// Revision 1.2 2002/12/27 00:12:48 mohor
+// Header changed, testbench improved to send a frame (crc still missing).
+//
+// Revision 1.1 2002/12/26 16:00:29 mohor
+// Testbench define file added. Clock divider register added.
+//
+//
+//
+//
+
+/* Mode register */
+`define CAN_MODE_RESET 1'h1 /* Reset mode */
+
+/* Bit Timing 0 register value */
+`define CAN_TIMING0_BRP 6'h0 /* Baud rate prescaler (2*(value+1)) */
+`define CAN_TIMING0_SJW 2'h2 /* SJW (value+1) */
+
+/* Bit Timing 1 register value */
+`define CAN_TIMING1_TSEG1 4'h4 /* TSEG1 segment (value+1) */
+`define CAN_TIMING1_TSEG2 3'h3 /* TSEG2 segment (value+1) */
+`define CAN_TIMING1_SAM 1'h0 /* Triple sampling */
+
+
Index: tags/rel_22/bench/verilog/timescale.v
===================================================================
--- tags/rel_22/bench/verilog/timescale.v (nonexistent)
+++ tags/rel_22/bench/verilog/timescale.v (revision 146)
@@ -0,0 +1,63 @@
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// timescale.v ////
+//// ////
+//// ////
+//// This file is part of the CAN Protocol Controller ////
+//// http://www.opencores.org/projects/can/ ////
+//// ////
+//// ////
+//// Author(s): ////
+//// Igor Mohor ////
+//// igorm@opencores.org ////
+//// ////
+//// ////
+//// All additional information is available in the README.txt ////
+//// file. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// Copyright (C) 2002, 2003 Authors ////
+//// ////
+//// This source file may be used and distributed without ////
+//// restriction provided that this copyright statement is not ////
+//// removed from the file and that any derivative work contains ////
+//// the original copyright notice and the associated disclaimer. ////
+//// ////
+//// This source file is free software; you can redistribute it ////
+//// and/or modify it under the terms of the GNU Lesser General ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any ////
+//// later version. ////
+//// ////
+//// This source is distributed in the hope that it will be ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
+//// PURPOSE. See the GNU Lesser General Public License for more ////
+//// details. ////
+//// ////
+//// You should have received a copy of the GNU Lesser General ////
+//// Public License along with this source; if not, download it ////
+//// from http://www.opencores.org/lgpl.shtml ////
+//// ////
+//// The CAN protocol is developed by Robert Bosch GmbH and ////
+//// protected by patents. Anybody who wants to implement this ////
+//// CAN IP core on silicon has to obtain a CAN protocol license ////
+//// from Bosch. ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//
+// CVS Revision History
+//
+// $Log: not supported by cvs2svn $
+// Revision 1.2 2002/12/27 00:12:48 mohor
+// Header changed, testbench improved to send a frame (crc still missing).
+//
+// Revision 1.1.1.1 2002/12/20 16:39:21 mohor
+// Initial
+//
+//
+//
+
+
+`timescale 1ns/10ps
tags/rel_22/bench/verilog/timescale.v
Property changes :
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property
Index: tags/rel_22/syn/synplicity/can.prj
===================================================================
--- tags/rel_22/syn/synplicity/can.prj (nonexistent)
+++ tags/rel_22/syn/synplicity/can.prj (revision 146)
@@ -0,0 +1,100 @@
+#-- Synplicity, Inc.
+#-- Version 7.2.2
+#-- Project file X:\zoidberg_soc\zoidberg_soc\can\syn\synplicity\can.prj
+#-- Written on Tue Sep 23 14:15:42 2003
+
+
+#add_file options
+add_file -verilog "$LIB/proasic/proasicplus.v"
+add_file -verilog "../../../memory/actel/ram_64x8_sync/actel_ram_64x8_sync.v"
+add_file -verilog "../../../memory/actel/ram_64x4_sync/actel_ram_64x4_sync.v"
+add_file -verilog "../../../memory/actel/ram_64x1_sync/actel_ram_64x1_sync.v"
+add_file -verilog "../../rtl/verilog/can_registers.v"
+add_file -verilog "../../rtl/verilog/can_bsp.v"
+add_file -verilog "../../rtl/verilog/can_btl.v"
+add_file -verilog "../../rtl/verilog/can_defines.v"
+add_file -verilog "../../rtl/verilog/can_register.v"
+add_file -verilog "../../rtl/verilog/can_register_asyn.v"
+add_file -verilog "../../rtl/verilog/can_register_asyn_syn.v"
+add_file -verilog "../../rtl/verilog/can_register_syn.v"
+add_file -verilog "../../rtl/verilog/can_top.v"
+add_file -verilog "../../rtl/verilog/can_fifo.v"
+add_file -verilog "../../rtl/verilog/can_acf.v"
+add_file -verilog "../../rtl/verilog/can_crc.v"
+add_file -verilog "../../rtl/verilog/can_ibo.v"
+
+
+#implementation: "rev_1"
+impl -add rev_1
+
+#device options
+set_option -technology PA
+set_option -part APA150
+set_option -speed_grade Std
+
+#compilation/mapping options
+set_option -default_enum_encoding default
+set_option -symbolic_fsm_compiler 1
+set_option -resource_sharing 1
+set_option -top_module "can_top"
+
+#map options
+set_option -frequency 50.000
+set_option -fanout_limit 12
+set_option -maxfan_hard 0
+set_option -disable_io_insertion 0
+set_option -report_path 4000
+
+#simulation options
+set_option -write_verilog 0
+set_option -write_vhdl 0
+
+#automatic place and route (vendor) options
+set_option -write_apr_constraint 1
+
+#set result format/file last
+project -result_file "rev_1/can_top.edn"
+
+#implementation attributes
+set_option -compiler_compatible 0
+set_option -include_path "../../rtl/verilog/;../../bench/verilog/"
+
+
+#implementation: "rev_2"
+impl -add rev_2
+
+#device options
+set_option -technology PA
+set_option -part APA600
+set_option -speed_grade Std
+
+#compilation/mapping options
+set_option -default_enum_encoding default
+set_option -symbolic_fsm_compiler 1
+set_option -resource_sharing 0
+set_option -top_module "can_top"
+
+#map options
+set_option -frequency 50.000
+set_option -fanout_limit 12
+set_option -maxfan_hard 0
+set_option -disable_io_insertion 0
+set_option -report_path 4000
+
+#simulation options
+set_option -write_verilog 1
+set_option -write_vhdl 0
+
+#automatic place and route (vendor) options
+set_option -write_apr_constraint 1
+
+#set result format/file last
+project -result_file "rev_2/can_top.edn"
+
+#implementation attributes
+set_option -vlog_std v95
+set_option -compiler_compatible 0
+set_option -num_critical_paths ""
+set_option -num_startend_points ""
+set_option -include_path "../../rtl/verilog/;../../bench/verilog/"
+impl -active "rev_2"
tags/rel_22/syn/synplicity/can.prj
Property changes :
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property
Index: tags/rel_22/syn/synplicity/rev_1/dir_keeper
===================================================================
Cannot display: file marked as a binary type.
svn:mime-type = application/octet-stream
Index: tags/rel_22/syn/synplicity/rev_1/dir_keeper
===================================================================
--- tags/rel_22/syn/synplicity/rev_1/dir_keeper (nonexistent)
+++ tags/rel_22/syn/synplicity/rev_1/dir_keeper (revision 146)
tags/rel_22/syn/synplicity/rev_1/dir_keeper
Property changes :
Added: svn:mime-type
## -0,0 +1 ##
+application/octet-stream
\ No newline at end of property
Index: tags/rel_22/syn/libero/pinedit.gcf
===================================================================
--- tags/rel_22/syn/libero/pinedit.gcf (nonexistent)
+++ tags/rel_22/syn/libero/pinedit.gcf (revision 146)
@@ -0,0 +1,5 @@
+set_io "H5" "clkout_o";
+set_io "M2" "tx_o";
+set_io "J1" "wb_rst_i";
+set_io "M3" "rx_i";
+set_io "H1" "clk_i";