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[/] [can/] [tags/] [rel_10/] [rtl/] [verilog/] [can_acf.v] - Rev 30
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////////////////////////////////////////////////////////////////////// //// //// //// 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 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 1.5 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 <= 0; 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 0; end endmodule
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