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/verilog/versatile_mem_ctrl/rtl/verilog/versatile_mem_ctrl_ip.v
39,130 → 39,135
//// from http://www.opencores.org/lgpl.shtml //// |
//// //// |
////////////////////////////////////////////////////////////////////// |
////////////////////////////////////////////////////////////////////// |
//// //// |
//// Versatile counter //// |
//// //// |
//// Description //// |
//// Versatile counter, a reconfigurable binary, gray or LFSR //// |
//// counter //// |
//// //// |
//// To Do: //// |
//// - add LFSR with more taps //// |
//// //// |
//// Author(s): //// |
//// - Michael Unneback, unneback@opencores.org //// |
//// ORSoC AB //// |
//// //// |
////////////////////////////////////////////////////////////////////// |
//// //// |
//// Copyright (C) 2009 Authors and OPENCORES.ORG //// |
//// //// |
//// 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 //// |
//// //// |
////////////////////////////////////////////////////////////////////// |
|
module versatile_fifo_async_cmp ( wptr, rptr, fifo_empty, fifo_full, wclk, rclk, rst ); |
|
parameter ADDR_WIDTH = 4; |
parameter N = ADDR_WIDTH-1; |
|
parameter Q1 = 2'b00; |
parameter Q2 = 2'b01; |
parameter Q3 = 2'b11; |
parameter Q4 = 2'b10; |
|
parameter going_empty = 1'b0; |
parameter going_full = 1'b1; |
|
input [N:0] wptr, rptr; |
output reg fifo_empty; |
output fifo_full; |
input wclk, rclk, rst; |
|
wire direction; |
reg direction_set, direction_clr; |
|
wire async_empty, async_full; |
wire fifo_full2; |
reg fifo_empty2; |
|
// direction_set |
always @ (wptr[N:N-1] or rptr[N:N-1]) |
case ({wptr[N:N-1],rptr[N:N-1]}) |
{Q1,Q2} : direction_set <= 1'b1; |
{Q2,Q3} : direction_set <= 1'b1; |
{Q3,Q4} : direction_set <= 1'b1; |
{Q4,Q1} : direction_set <= 1'b1; |
default : direction_set <= 1'b0; |
endcase |
|
// direction_clear |
always @ (wptr[N:N-1] or rptr[N:N-1] or rst) |
if (rst) |
direction_clr <= 1'b1; |
else |
case ({wptr[N:N-1],rptr[N:N-1]}) |
{Q2,Q1} : direction_clr <= 1'b1; |
{Q3,Q2} : direction_clr <= 1'b1; |
{Q4,Q3} : direction_clr <= 1'b1; |
{Q1,Q4} : direction_clr <= 1'b1; |
default : direction_clr <= 1'b0; |
endcase |
|
`ifndef GENERATE_DIRECTION_AS_LATCH |
dff_sr dff_sr_dir( .aclr(direction_clr), .aset(direction_set), .clock(1'b1), .data(1'b1), .q(direction)); |
`endif |
|
`ifdef GENERATE_DIRECTION_AS_LATCH |
always @ (posedge direction_set or posedge direction_clr) |
if (direction_clr) |
direction <= going_empty; |
else |
direction <= going_full; |
`endif |
|
assign async_empty = (wptr == rptr) && (direction==going_empty); |
assign async_full = (wptr == rptr) && (direction==going_full); |
|
dff_sr dff_sr_empty0( .aclr(rst), .aset(async_full), .clock(wclk), .data(async_full), .q(fifo_full2)); |
dff_sr dff_sr_empty1( .aclr(rst), .aset(async_full), .clock(wclk), .data(fifo_full2), .q(fifo_full)); |
|
/* |
always @ (posedge wclk or posedge rst or posedge async_full) |
if (rst) |
{fifo_full, fifo_full2} <= 2'b00; |
else if (async_full) |
{fifo_full, fifo_full2} <= 2'b11; |
else |
{fifo_full, fifo_full2} <= {fifo_full2, async_full}; |
*/ |
always @ (posedge rclk or posedge async_empty) |
if (async_empty) |
{fifo_empty, fifo_empty2} <= 2'b11; |
else |
{fifo_empty,fifo_empty2} <= {fifo_empty2,async_empty}; |
|
endmodule // async_comp |
////////////////////////////////////////////////////////////////////// |
//// //// |
//// Versatile counter //// |
//// //// |
//// Description //// |
//// Versatile counter, a reconfigurable binary, gray or LFSR //// |
//// counter //// |
//// //// |
//// To Do: //// |
//// - add LFSR with more taps //// |
//// //// |
//// Author(s): //// |
//// - Michael Unneback, unneback@opencores.org //// |
//// ORSoC AB //// |
//// //// |
////////////////////////////////////////////////////////////////////// |
//// //// |
//// Copyright (C) 2009 Authors and OPENCORES.ORG //// |
//// //// |
//// 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 //// |
//// //// |
////////////////////////////////////////////////////////////////////// |
|
module versatile_fifo_async_cmp ( wptr, rptr, fifo_empty, fifo_full, wclk, rclk, rst ); |
|
parameter ADDR_WIDTH = 4; |
parameter N = ADDR_WIDTH-1; |
|
parameter Q1 = 2'b00; |
parameter Q2 = 2'b01; |
parameter Q3 = 2'b11; |
parameter Q4 = 2'b10; |
|
parameter going_empty = 1'b0; |
parameter going_full = 1'b1; |
|
input [N:0] wptr, rptr; |
output reg fifo_empty; |
output fifo_full; |
input wclk, rclk, rst; |
|
`ifndef GENERATE_DIRECTION_AS_LATCH |
wire direction; |
`endif |
`ifdef GENERATE_DIRECTION_AS_LATCH |
reg direction; |
`endif |
reg direction_set, direction_clr; |
|
wire async_empty, async_full; |
wire fifo_full2; |
reg fifo_empty2; |
|
// direction_set |
always @ (wptr[N:N-1] or rptr[N:N-1]) |
case ({wptr[N:N-1],rptr[N:N-1]}) |
{Q1,Q2} : direction_set <= 1'b1; |
{Q2,Q3} : direction_set <= 1'b1; |
{Q3,Q4} : direction_set <= 1'b1; |
{Q4,Q1} : direction_set <= 1'b1; |
default : direction_set <= 1'b0; |
endcase |
|
// direction_clear |
always @ (wptr[N:N-1] or rptr[N:N-1] or rst) |
if (rst) |
direction_clr <= 1'b1; |
else |
case ({wptr[N:N-1],rptr[N:N-1]}) |
{Q2,Q1} : direction_clr <= 1'b1; |
{Q3,Q2} : direction_clr <= 1'b1; |
{Q4,Q3} : direction_clr <= 1'b1; |
{Q1,Q4} : direction_clr <= 1'b1; |
default : direction_clr <= 1'b0; |
endcase |
|
`ifndef GENERATE_DIRECTION_AS_LATCH |
dff_sr dff_sr_dir( .aclr(direction_clr), .aset(direction_set), .clock(1'b1), .data(1'b1), .q(direction)); |
`endif |
|
`ifdef GENERATE_DIRECTION_AS_LATCH |
always @ (posedge direction_set or posedge direction_clr) |
if (direction_clr) |
direction <= going_empty; |
else |
direction <= going_full; |
`endif |
|
assign async_empty = (wptr == rptr) && (direction==going_empty); |
assign async_full = (wptr == rptr) && (direction==going_full); |
|
dff_sr dff_sr_empty0( .aclr(rst), .aset(async_full), .clock(wclk), .data(async_full), .q(fifo_full2)); |
dff_sr dff_sr_empty1( .aclr(rst), .aset(async_full), .clock(wclk), .data(fifo_full2), .q(fifo_full)); |
|
/* |
always @ (posedge wclk or posedge rst or posedge async_full) |
if (rst) |
{fifo_full, fifo_full2} <= 2'b00; |
else if (async_full) |
{fifo_full, fifo_full2} <= 2'b11; |
else |
{fifo_full, fifo_full2} <= {fifo_full2, async_full}; |
*/ |
always @ (posedge rclk or posedge async_empty) |
if (async_empty) |
{fifo_empty, fifo_empty2} <= 2'b11; |
else |
{fifo_empty,fifo_empty2} <= {fifo_empty2,async_empty}; |
|
endmodule // async_comp |
// async FIFO with multiple queues |
|
module async_fifo_mq ( |
298,7 → 303,7
input we_b; |
input clk_a, clk_b; |
reg [(DATA_WIDTH-1):0] q_b; |
reg [DATA_WIDTH-1:0] ram [(1<<ADDR_WIDTH)-1:0] `SYN; |
reg [DATA_WIDTH-1:0] ram [(1<<ADDR_WIDTH)-1:0] /*synthesis syn_ramstyle = "no_rw_check"*/; |
always @ (posedge clk_a) |
begin |
q_a <= ram[adr_a]; |
3474,10 → 3479,9
|
// Most of these defines have an effect on things in fsm_sdr_16.v |
|
|
//`define MT48LC32M16 // 64MB part |
`define MT48LC16M16 // 32MB part |
//`define MT48LC4M16 // 8MB part |
`define MT48LC16M16 // 32MB part |
//`define MT48LC4M16 // 8MB part |
|
// Define this to allow indication that a burst read is still going |
// to the wishbone state machine, so it doesn't start emptying the |
3493,7 → 3497,7
|
|
`ifdef MT48LC32M16 |
// using 1 of MT48LC16M16 |
// using 1 of MT48LC32M16 |
// SDRAM data width is 16 |
|
`define SDRAM_DATA_WIDTH 16 |
4100,6 → 4104,11
|
endmodule |
`endif // !`ifdef ORIGINAL_EGRESS_FIFO |
// true dual port RAM, sync |
|
`ifdef ACTEL |
`define SYN |
`endif |
module vfifo_dual_port_ram_dc_sw |
( |
d_a, |
4119,7 → 4128,7
output [(DATA_WIDTH-1):0] q_b; |
input clk_a, clk_b; |
reg [(ADDR_WIDTH-1):0] adr_b_reg; |
reg [DATA_WIDTH-1:0] ram [(1<<ADDR_WIDTH)-1:0]/*synthesis syn_ramstyle = "no_rw_check"*/ ; |
reg [DATA_WIDTH-1:0] ram [(1<<ADDR_WIDTH)-1:0] /*synthesis syn_ramstyle = "no_rw_check"*/; |
always @ (posedge clk_a) |
if (we_a) |
ram[adr_a] <= d_a; |
/verilog/versatile_mem_ctrl/versatile_mem_ctrl.v
1072,7 → 1072,7
output [(DATA_WIDTH-1):0] q_b; |
input clk_a, clk_b; |
reg [(ADDR_WIDTH-1):0] adr_b_reg; |
reg [DATA_WIDTH-1:0] ram [(1<<ADDR_WIDTH)-1:0] ; |
reg [DATA_WIDTH-1:0] ram [(1<<ADDR_WIDTH)-1:0] /*synthesis syn_ramstyle = "no_rw_check"*/; |
always @ (posedge clk_a) |
if (we_a) |
ram[adr_a] <= d_a; |