| Line 643... |
Line 643... |
|
|
parameter width = 32;
|
parameter width = 32;
|
parameter nr_of_ports = 4;
|
parameter nr_of_ports = 4;
|
input [width-1:0] a3, a2, a1, a0;
|
input [width-1:0] a3, a2, a1, a0;
|
input [nr_of_ports-1:0] sel;
|
input [nr_of_ports-1:0] sel;
|
output reg [width-1:0] dout;
|
output [width-1:0] dout;
|
|
|
wire [width-1:0] tmp [nr_of_ports-1:0];
|
wire [width-1:0] tmp [nr_of_ports-1:0];
|
integer i;
|
integer i;
|
|
|
// and
|
// and
|
| Line 665... |
Line 665... |
|
|
parameter width = 32;
|
parameter width = 32;
|
parameter nr_of_ports = 5;
|
parameter nr_of_ports = 5;
|
input [width-1:0] a4, a3, a2, a1, a0;
|
input [width-1:0] a4, a3, a2, a1, a0;
|
input [nr_of_ports-1:0] sel;
|
input [nr_of_ports-1:0] sel;
|
output reg [width-1:0] dout;
|
output [width-1:0] dout;
|
|
|
wire [width-1:0] tmp [nr_of_ports-1:0];
|
wire [width-1:0] tmp [nr_of_ports-1:0];
|
integer i;
|
integer i;
|
|
|
// and
|
// and
|
| Line 688... |
Line 688... |
|
|
parameter width = 32;
|
parameter width = 32;
|
parameter nr_of_ports = 6;
|
parameter nr_of_ports = 6;
|
input [width-1:0] a5, a4, a3, a2, a1, a0;
|
input [width-1:0] a5, a4, a3, a2, a1, a0;
|
input [nr_of_ports-1:0] sel;
|
input [nr_of_ports-1:0] sel;
|
output reg [width-1:0] dout;
|
output [width-1:0] dout;
|
|
|
wire [width-1:0] tmp [nr_of_ports-1:0];
|
wire [width-1:0] tmp [nr_of_ports-1:0];
|
integer i;
|
integer i;
|
|
|
// and
|
// and
|
| Line 748... |
Line 748... |
//// from http://www.opencores.org/lgpl.shtml ////
|
//// from http://www.opencores.org/lgpl.shtml ////
|
//// ////
|
//// ////
|
//////////////////////////////////////////////////////////////////////
|
//////////////////////////////////////////////////////////////////////
|
|
|
// binary counter
|
// binary counter
|
|
module vl_cnt_bin ( q, rst, clk);
|
|
|
|
parameter length = 4;
|
|
output [length:1] q;
|
|
input rst;
|
|
input clk;
|
|
|
|
parameter clear_value = 0;
|
|
parameter set_value = 1;
|
|
parameter wrap_value = 0;
|
|
parameter level1_value = 15;
|
|
|
|
reg [length:1] qi;
|
|
wire [length:1] q_next;
|
|
assign q_next = qi + {{length-1{1'b0}},1'b1};
|
|
|
|
always @ (posedge clk or posedge rst)
|
|
if (rst)
|
|
qi <= {length{1'b0}};
|
|
else
|
|
qi <= q_next;
|
|
|
|
assign q = qi;
|
|
|
|
endmodule
|
|
//////////////////////////////////////////////////////////////////////
|
|
//// ////
|
|
//// 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 ////
|
|
//// ////
|
|
//////////////////////////////////////////////////////////////////////
|
|
|
|
// binary counter
|
|
module vl_cnt_bin_clear ( clear, q, rst, clk);
|
|
|
|
parameter length = 4;
|
|
input clear;
|
|
output [length:1] q;
|
|
input rst;
|
|
input clk;
|
|
|
|
parameter clear_value = 0;
|
|
parameter set_value = 1;
|
|
parameter wrap_value = 0;
|
|
parameter level1_value = 15;
|
|
|
|
reg [length:1] qi;
|
|
wire [length:1] q_next;
|
|
assign q_next = clear ? {length{1'b0}} :qi + {{length-1{1'b0}},1'b1};
|
|
|
|
always @ (posedge clk or posedge rst)
|
|
if (rst)
|
|
qi <= {length{1'b0}};
|
|
else
|
|
qi <= q_next;
|
|
|
|
assign q = qi;
|
|
|
|
endmodule
|
|
//////////////////////////////////////////////////////////////////////
|
|
//// ////
|
|
//// 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 ////
|
|
//// ////
|
|
//////////////////////////////////////////////////////////////////////
|
|
|
|
// binary counter
|
module vl_cnt_bin_ce ( cke, q, rst, clk);
|
module vl_cnt_bin_ce ( cke, q, rst, clk);
|
|
|
parameter length = 4;
|
parameter length = 4;
|
input cke;
|
input cke;
|
output [length:1] q;
|
output [length:1] q;
|
| Line 1240... |
Line 1377... |
|
|
|
|
always @ (posedge clk or posedge rst)
|
always @ (posedge clk or posedge rst)
|
if (rst)
|
if (rst)
|
zq <= 1'b1;
|
zq <= 1'b1;
|
|
else
|
|
if (cke)
|
|
zq <= q_next == {length{1'b0}};
|
|
endmodule
|
|
//////////////////////////////////////////////////////////////////////
|
|
//// ////
|
|
//// 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 ////
|
|
//// ////
|
|
//////////////////////////////////////////////////////////////////////
|
|
|
|
// LFSR counter
|
|
module vl_cnt_lfsr_ce_q_zq ( cke, q, zq, rst, clk);
|
|
|
|
parameter length = 4;
|
|
input cke;
|
|
output [length:1] q;
|
|
output reg zq;
|
|
input rst;
|
|
input clk;
|
|
|
|
parameter clear_value = 0;
|
|
parameter set_value = 1;
|
|
parameter wrap_value = 8;
|
|
parameter level1_value = 15;
|
|
|
|
reg [length:1] qi;
|
|
reg lfsr_fb;
|
|
wire [length:1] q_next;
|
|
reg [32:1] polynom;
|
|
integer i;
|
|
|
|
always @ (qi)
|
|
begin
|
|
case (length)
|
|
2: polynom = 32'b11; // 0x3
|
|
3: polynom = 32'b110; // 0x6
|
|
4: polynom = 32'b1100; // 0xC
|
|
5: polynom = 32'b10100; // 0x14
|
|
6: polynom = 32'b110000; // 0x30
|
|
7: polynom = 32'b1100000; // 0x60
|
|
8: polynom = 32'b10111000; // 0xb8
|
|
9: polynom = 32'b100010000; // 0x110
|
|
10: polynom = 32'b1001000000; // 0x240
|
|
11: polynom = 32'b10100000000; // 0x500
|
|
12: polynom = 32'b100000101001; // 0x829
|
|
13: polynom = 32'b1000000001100; // 0x100C
|
|
14: polynom = 32'b10000000010101; // 0x2015
|
|
15: polynom = 32'b110000000000000; // 0x6000
|
|
16: polynom = 32'b1101000000001000; // 0xD008
|
|
17: polynom = 32'b10010000000000000; // 0x12000
|
|
18: polynom = 32'b100000010000000000; // 0x20400
|
|
19: polynom = 32'b1000000000000100011; // 0x40023
|
|
20: polynom = 32'b10000010000000000000; // 0x82000
|
|
21: polynom = 32'b101000000000000000000; // 0x140000
|
|
22: polynom = 32'b1100000000000000000000; // 0x300000
|
|
23: polynom = 32'b10000100000000000000000; // 0x420000
|
|
24: polynom = 32'b111000010000000000000000; // 0xE10000
|
|
25: polynom = 32'b1001000000000000000000000; // 0x1200000
|
|
26: polynom = 32'b10000000000000000000100011; // 0x2000023
|
|
27: polynom = 32'b100000000000000000000010011; // 0x4000013
|
|
28: polynom = 32'b1100100000000000000000000000; // 0xC800000
|
|
29: polynom = 32'b10100000000000000000000000000; // 0x14000000
|
|
30: polynom = 32'b100000000000000000000000101001; // 0x20000029
|
|
31: polynom = 32'b1001000000000000000000000000000; // 0x48000000
|
|
32: polynom = 32'b10000000001000000000000000000011; // 0x80200003
|
|
default: polynom = 32'b0;
|
|
endcase
|
|
lfsr_fb = qi[length];
|
|
for (i=length-1; i>=1; i=i-1) begin
|
|
if (polynom[i])
|
|
lfsr_fb = lfsr_fb ~^ qi[i];
|
|
end
|
|
end
|
|
assign q_next = (qi == wrap_value) ? {length{1'b0}} :{qi[length-1:1],lfsr_fb};
|
|
|
|
always @ (posedge clk or posedge rst)
|
|
if (rst)
|
|
qi <= {length{1'b0}};
|
|
else
|
|
if (cke)
|
|
qi <= q_next;
|
|
|
|
assign q = qi;
|
|
|
|
|
|
always @ (posedge clk or posedge rst)
|
|
if (rst)
|
|
zq <= 1'b1;
|
else
|
else
|
if (cke)
|
if (cke)
|
zq <= q_next == {length{1'b0}};
|
zq <= q_next == {length{1'b0}};
|
endmodule
|
endmodule
|
//////////////////////////////////////////////////////////////////////
|
//////////////////////////////////////////////////////////////////////
|
