i ve written verilog code for crc32 with 32 bit data width as follows // CRC module for data[31:0] , crc[31:0]=1+x^1+x^2+x^4+x^5+x^7+x^8+x^10+x^11+x^12+x^16+x^22+x^23+x^26+x ^32; //---------------------------------------------------------------------- ------- module crc( input [31:0] data_in, input crc_en, output [31:0] crc_out, input rst, input clk); reg [31:0] lfsr_q,lfsr_c; assign crc_out = lfsr_q; always @(*) begin lfsr_c[0] = lfsr_q[0] ^ lfsr_q[6] ^ lfsr_q[9] ^ lfsr_q[10] ^ lfsr_q[12] ^ lfsr_q[16] ^ lfsr_q[24] ^ lfsr_q[25] ^ lfsr_q[26] ^ lfsr_q[28] ^ lfsr_q[29] ^ lfsr_q[30] ^ lfsr_q[31] ^ data_in[0] ^ data_in[6] ^ data_in[9] ^ data_in[10] ^ data_in[12] ^ data_in[16] ^ data_in[24] ^ data_in[25] ^ data_in[26] ^ data_in[28] ^ data_in[29] ^ data_in[30] ^ data_in[31]; lfsr_c[1] = lfsr_q[0] ^ lfsr_q[1] ^ lfsr_q[6] ^ lfsr_q[7] ^ lfsr_q[9] ^ lfsr_q[11] ^ lfsr_q[12] ^ lfsr_q[13] ^ lfsr_q[16] ^ lfsr_q[17] ^ lfsr_q[24] ^ lfsr_q[27] ^ lfsr_q[28] ^ data_in[0] ^ data_in[1] ^ data_in[6] ^ data_in[7] ^ data_in[9] ^ data_in[11] ^ data_in[12] ^ data_in[13] ^ data_in[16] ^ data_in[17] ^ data_in[24] ^ data_in[27] ^ data_in[28]; lfsr_c[2] = lfsr_q[0] ^ lfsr_q[1] ^ lfsr_q[2] ^ lfsr_q[6] ^ lfsr_q[7] ^ lfsr_q[8] ^ lfsr_q[9] ^ lfsr_q[13] ^ lfsr_q[14] ^ lfsr_q[16] ^ lfsr_q[17] ^ lfsr_q[18] ^ lfsr_q[24] ^ lfsr_q[26] ^ lfsr_q[30] ^ lfsr_q[31] ^ data_in[0] ^ data_in[1] ^ data_in[2] ^ data_in[6] ^ data_in[7] ^ data_in[8] ^ data_in[9] ^ data_in[13] ^ data_in[14] ^ data_in[16] ^ data_in[17] ^ data_in[18] ^ data_in[24] ^ data_in[26] ^ data_in[30] ^ data_in[31]; lfsr_c[3] = lfsr_q[1] ^ lfsr_q[2] ^ lfsr_q[3] ^ lfsr_q[7] ^ lfsr_q[8] ^ lfsr_q[9] ^ lfsr_q[10] ^ lfsr_q[14] ^ lfsr_q[15] ^ lfsr_q[17] ^ lfsr_q[18] ^ lfsr_q[19] ^ lfsr_q[25] ^ lfsr_q[27] ^ lfsr_q[31] ^ data_in[1] ^ data_in[2] ^ data_in[3] ^ data_in[7] ^ data_in[8] ^ data_in[9] ^ data_in[10] ^ data_in[14] ^ data_in[15] ^ data_in[17] ^ data_in[18] ^ data_in[19] ^ data_in[25] ^ data_in[27] ^ data_in[31]; lfsr_c[4] = lfsr_q[0] ^ lfsr_q[2] ^ lfsr_q[3] ^ lfsr_q[4] ^ lfsr_q[6] ^ lfsr_q[8] ^ lfsr_q[11] ^ lfsr_q[12] ^ lfsr_q[15] ^ lfsr_q[18] ^ lfsr_q[19] ^ lfsr_q[20] ^ lfsr_q[24] ^ lfsr_q[25] ^ lfsr_q[29] ^ lfsr_q[30] ^ lfsr_q[31] ^ data_in[0] ^ data_in[2] ^ data_in[3] ^ data_in[4] ^ data_in[6] ^ data_in[8] ^ data_in[11] ^ data_in[12] ^ data_in[15] ^ data_in[18] ^ data_in[19] ^ data_in[20] ^ data_in[24] ^ data_in[25] ^ data_in[29] ^ data_in[30] ^ data_in[31]; lfsr_c[5] = lfsr_q[0] ^ lfsr_q[1] ^ lfsr_q[3] ^ lfsr_q[4] ^ lfsr_q[5] ^ lfsr_q[6] ^ lfsr_q[7] ^ lfsr_q[10] ^ lfsr_q[13] ^ lfsr_q[19] ^ lfsr_q[20] ^ lfsr_q[21] ^ lfsr_q[24] ^ lfsr_q[28] ^ lfsr_q[29] ^ data_in[0] ^ data_in[1] ^ data_in[3] ^ data_in[4] ^ data_in[5] ^ data_in[6] ^ data_in[7] ^ data_in[10] ^ data_in[13] ^ data_in[19] ^ data_in[20] ^ data_in[21] ^ data_in[24] ^ data_in[28] ^ data_in[29]; lfsr_c[6] = lfsr_q[1] ^ lfsr_q[2] ^ lfsr_q[4] ^ lfsr_q[5] ^ lfsr_q[6] ^ lfsr_q[7] ^ lfsr_q[8] ^ lfsr_q[11] ^ lfsr_q[14] ^ lfsr_q[20] ^ lfsr_q[21] ^ lfsr_q[22] ^ lfsr_q[25] ^ lfsr_q[29] ^ lfsr_q[30] ^ data_in[1] ^ data_in[2] ^ data_in[4] ^ data_in[5] ^ data_in[6] ^ data_in[7] ^ data_in[8] ^ data_in[11] ^ data_in[14] ^ data_in[20] ^ data_in[21] ^ data_in[22] ^ data_in[25] ^ data_in[29] ^ data_in[30]; lfsr_c[7] = lfsr_q[0] ^ lfsr_q[2] ^ lfsr_q[3] ^ lfsr_q[5] ^ lfsr_q[7] ^ lfsr_q[8] ^ lfsr_q[10] ^ lfsr_q[15] ^ lfsr_q[16] ^ lfsr_q[21] ^ lfsr_q[22] ^ lfsr_q[23] ^ lfsr_q[24] ^ lfsr_q[25] ^ lfsr_q[28] ^ lfsr_q[29] ^ data_in[0] ^ data_in[2] ^ data_in[3] ^ data_in[5] ^ data_in[7] ^ data_in[8] ^ data_in[10] ^ data_in[15] ^ data_in[16] ^ data_in[21] ^ data_in[22] ^ data_in[23] ^ data_in[24] ^ data_in[25] ^ data_in[28] ^ data_in[29]; lfsr_c[8] = lfsr_q[0] ^ lfsr_q[1] ^ lfsr_q[3] ^ lfsr_q[4] ^ lfsr_q[8] ^ lfsr_q[10] ^ lfsr_q[11] ^ lfsr_q[12] ^ lfsr_q[17] ^ lfsr_q[22] ^ lfsr_q[23] ^ lfsr_q[28] ^ lfsr_q[31] ^ data_in[0] ^ data_in[1] ^ data_in[3] ^ data_in[4] ^ data_in[8] ^ data_in[10] ^ data_in[11] ^ data_in[12] ^ data_in[17] ^ data_in[22] ^ data_in[23] ^ data_in[28] ^ data_in[31]; lfsr_c[9] = lfsr_q[1] ^ lfsr_q[2] ^ lfsr_q[4] ^ lfsr_q[5] ^ lfsr_q[9] ^ lfsr_q[11] ^ lfsr_q[12] ^ lfsr_q[13] ^ lfsr_q[18] ^ lfsr_q[23] ^ lfsr_q[24] ^ lfsr_q[29] ^ data_in[1] ^ data_in[2] ^ data_in[4] ^ data_in[5] ^ data_in[9] ^ data_in[11] ^ data_in[12] ^ data_in[13] ^ data_in[18] ^ data_in[23] ^ data_in[24] ^ data_in[29]; lfsr_c[10] = lfsr_q[0] ^ lfsr_q[2] ^ lfsr_q[3] ^ lfsr_q[5] ^ lfsr_q[9] ^ lfsr_q[13] ^ lfsr_q[14] ^ lfsr_q[16] ^ lfsr_q[19] ^ lfsr_q[26] ^ lfsr_q[28] ^ lfsr_q[29] ^ lfsr_q[31] ^ data_in[0] ^ data_in[2] ^ data_in[3] ^ data_in[5] ^ data_in[9] ^ data_in[13] ^ data_in[14] ^ data_in[16] ^ data_in[19] ^ data_in[26] ^ data_in[28] ^ data_in[29] ^ data_in[31]; lfsr_c[11] = lfsr_q[0] ^ lfsr_q[1] ^ lfsr_q[3] ^ lfsr_q[4] ^ lfsr_q[9] ^ lfsr_q[12] ^ lfsr_q[14] ^ lfsr_q[15] ^ lfsr_q[16] ^ lfsr_q[17] ^ lfsr_q[20] ^ lfsr_q[24] ^ lfsr_q[25] ^ lfsr_q[26] ^ lfsr_q[27] ^ lfsr_q[28] ^ lfsr_q[31] ^ data_in[0] ^ data_in[1] ^ data_in[3] ^ data_in[4] ^ data_in[9] ^ data_in[12] ^ data_in[14] ^ data_in[15] ^ data_in[16] ^ data_in[17] ^ data_in[20] ^ data_in[24] ^ data_in[25] ^ data_in[26] ^ data_in[27] ^ data_in[28] ^ data_in[31]; lfsr_c[12] = lfsr_q[0] ^ lfsr_q[1] ^ lfsr_q[2] ^ lfsr_q[4] ^ lfsr_q[5] ^ lfsr_q[6] ^ lfsr_q[9] ^ lfsr_q[12] ^ lfsr_q[13] ^ lfsr_q[15] ^ lfsr_q[17] ^ lfsr_q[18] ^ lfsr_q[21] ^ lfsr_q[24] ^ lfsr_q[27] ^ lfsr_q[30] ^ lfsr_q[31] ^ data_in[0] ^ data_in[1] ^ data_in[2] ^ data_in[4] ^ data_in[5] ^ data_in[6] ^ data_in[9] ^ data_in[12] ^ data_in[13] ^ data_in[15] ^ data_in[17] ^ data_in[18] ^ data_in[21] ^ data_in[24] ^ data_in[27] ^ data_in[30] ^ data_in[31]; lfsr_c[13] = lfsr_q[1] ^ lfsr_q[2] ^ lfsr_q[3] ^ lfsr_q[5] ^ lfsr_q[6] ^ lfsr_q[7] ^ lfsr_q[10] ^ lfsr_q[13] ^ lfsr_q[14] ^ lfsr_q[16] ^ lfsr_q[18] ^ lfsr_q[19] ^ lfsr_q[22] ^ lfsr_q[25] ^ lfsr_q[28] ^ lfsr_q[31] ^ data_in[1] ^ data_in[2] ^ data_in[3] ^ data_in[5] ^ data_in[6] ^ data_in[7] ^ data_in[10] ^ data_in[13] ^ data_in[14] ^ data_in[16] ^ data_in[18] ^ data_in[19] ^ data_in[22] ^ data_in[25] ^ data_in[28] ^ data_in[31]; lfsr_c[14] = lfsr_q[2] ^ lfsr_q[3] ^ lfsr_q[4] ^ lfsr_q[6] ^ lfsr_q[7] ^ lfsr_q[8] ^ lfsr_q[11] ^ lfsr_q[14] ^ lfsr_q[15] ^ lfsr_q[17] ^ lfsr_q[19] ^ lfsr_q[20] ^ lfsr_q[23] ^ lfsr_q[26] ^ lfsr_q[29] ^ data_in[2] ^ data_in[3] ^ data_in[4] ^ data_in[6] ^ data_in[7] ^ data_in[8] ^ data_in[11] ^ data_in[14] ^ data_in[15] ^ data_in[17] ^ data_in[19] ^ data_in[20] ^ data_in[23] ^ data_in[26] ^ data_in[29]; lfsr_c[15] = lfsr_q[3] ^ lfsr_q[4] ^ lfsr_q[5] ^ lfsr_q[7] ^ lfsr_q[8] ^ lfsr_q[9] ^ lfsr_q[12] ^ lfsr_q[15] ^ lfsr_q[16] ^ lfsr_q[18] ^ lfsr_q[20] ^ lfsr_q[21] ^ lfsr_q[24] ^ lfsr_q[27] ^ lfsr_q[30] ^ data_in[3] ^ data_in[4] ^ data_in[5] ^ data_in[7] ^ data_in[8] ^ data_in[9] ^ data_in[12] ^ data_in[15] ^ data_in[16] ^ data_in[18] ^ data_in[20] ^ data_in[21] ^ data_in[24] ^ data_in[27] ^ data_in[30]; lfsr_c[16] = lfsr_q[0] ^ lfsr_q[4] ^ lfsr_q[5] ^ lfsr_q[8] ^ lfsr_q[12] ^ lfsr_q[13] ^ lfsr_q[17] ^ lfsr_q[19] ^ lfsr_q[21] ^ lfsr_q[22] ^ lfsr_q[24] ^ lfsr_q[26] ^ lfsr_q[29] ^ lfsr_q[30] ^ data_in[0] ^ data_in[4] ^ data_in[5] ^ data_in[8] ^ data_in[12] ^ data_in[13] ^ data_in[17] ^ data_in[19] ^ data_in[21] ^ data_in[22] ^ data_in[24] ^ data_in[26] ^ data_in[29] ^ data_in[30]; lfsr_c[17] = lfsr_q[1] ^ lfsr_q[5] ^ lfsr_q[6] ^ lfsr_q[9] ^ lfsr_q[13] ^ lfsr_q[14] ^ lfsr_q[18] ^ lfsr_q[20] ^ lfsr_q[22] ^ lfsr_q[23] ^ lfsr_q[25] ^ lfsr_q[27] ^ lfsr_q[30] ^ lfsr_q[31] ^ data_in[1] ^ data_in[5] ^ data_in[6] ^ data_in[9] ^ data_in[13] ^ data_in[14] ^ data_in[18] ^ data_in[20] ^ data_in[22] ^ data_in[23] ^ data_in[25] ^ data_in[27] ^ data_in[30] ^ data_in[31]; lfsr_c[18] = lfsr_q[2] ^ lfsr_q[6] ^ lfsr_q[7] ^ lfsr_q[10] ^ lfsr_q[14] ^ lfsr_q[15] ^ lfsr_q[19] ^ lfsr_q[21] ^ lfsr_q[23] ^ lfsr_q[24] ^ lfsr_q[26] ^ lfsr_q[28] ^ lfsr_q[31] ^ data_in[2] ^ data_in[6] ^ data_in[7] ^ data_in[10] ^ data_in[14] ^ data_in[15] ^ data_in[19] ^ data_in[21] ^ data_in[23] ^ data_in[24] ^ data_in[26] ^ data_in[28] ^ data_in[31]; lfsr_c[19] = lfsr_q[3] ^ lfsr_q[7] ^ lfsr_q[8] ^ lfsr_q[11] ^ lfsr_q[15] ^ lfsr_q[16] ^ lfsr_q[20] ^ lfsr_q[22] ^ lfsr_q[24] ^ lfsr_q[25] ^ lfsr_q[27] ^ lfsr_q[29] ^ data_in[3] ^ data_in[7] ^ data_in[8] ^ data_in[11] ^ data_in[15] ^ data_in[16] ^ data_in[20] ^ data_in[22] ^ data_in[24] ^ data_in[25] ^ data_in[27] ^ data_in[29]; lfsr_c[20] = lfsr_q[4] ^ lfsr_q[8] ^ lfsr_q[9] ^ lfsr_q[12] ^ lfsr_q[16] ^ lfsr_q[17] ^ lfsr_q[21] ^ lfsr_q[23] ^ lfsr_q[25] ^ lfsr_q[26] ^ lfsr_q[28] ^ lfsr_q[30] ^ data_in[4] ^ data_in[8] ^ data_in[9] ^ data_in[12] ^ data_in[16] ^ data_in[17] ^ data_in[21] ^ data_in[23] ^ data_in[25] ^ data_in[26] ^ data_in[28] ^ data_in[30]; lfsr_c[21] = lfsr_q[5] ^ lfsr_q[9] ^ lfsr_q[10] ^ lfsr_q[13] ^ lfsr_q[17] ^ lfsr_q[18] ^ lfsr_q[22] ^ lfsr_q[24] ^ lfsr_q[26] ^ lfsr_q[27] ^ lfsr_q[29] ^ lfsr_q[31] ^ data_in[5] ^ data_in[9] ^ data_in[10] ^ data_in[13] ^ data_in[17] ^ data_in[18] ^ data_in[22] ^ data_in[24] ^ data_in[26] ^ data_in[27] ^ data_in[29] ^ data_in[31]; lfsr_c[22] = lfsr_q[0] ^ lfsr_q[9] ^ lfsr_q[11] ^ lfsr_q[12] ^ lfsr_q[14] ^ lfsr_q[16] ^ lfsr_q[18] ^ lfsr_q[19] ^ lfsr_q[23] ^ lfsr_q[24] ^ lfsr_q[26] ^ lfsr_q[27] ^ lfsr_q[29] ^ lfsr_q[31] ^ data_in[0] ^ data_in[9] ^ data_in[11] ^ data_in[12] ^ data_in[14] ^ data_in[16] ^ data_in[18] ^ data_in[19] ^ data_in[23] ^ data_in[24] ^ data_in[26] ^ data_in[27] ^ data_in[29] ^ data_in[31]; lfsr_c[23] = lfsr_q[0] ^ lfsr_q[1] ^ lfsr_q[6] ^ lfsr_q[9] ^ lfsr_q[13] ^ lfsr_q[15] ^ lfsr_q[16] ^ lfsr_q[17] ^ lfsr_q[19] ^ lfsr_q[20] ^ lfsr_q[26] ^ lfsr_q[27] ^ lfsr_q[29] ^ lfsr_q[31] ^ data_in[0] ^ data_in[1] ^ data_in[6] ^ data_in[9] ^ data_in[13] ^ data_in[15] ^ data_in[16] ^ data_in[17] ^ data_in[19] ^ data_in[20] ^ data_in[26] ^ data_in[27] ^ data_in[29] ^ data_in[31]; lfsr_c[24] = lfsr_q[1] ^ lfsr_q[2] ^ lfsr_q[7] ^ lfsr_q[10] ^ lfsr_q[14] ^ lfsr_q[16] ^ lfsr_q[17] ^ lfsr_q[18] ^ lfsr_q[20] ^ lfsr_q[21] ^ lfsr_q[27] ^ lfsr_q[28] ^ lfsr_q[30] ^ data_in[1] ^ data_in[2] ^ data_in[7] ^ data_in[10] ^ data_in[14] ^ data_in[16] ^ data_in[17] ^ data_in[18] ^ data_in[20] ^ data_in[21] ^ data_in[27] ^ data_in[28] ^ data_in[30]; lfsr_c[25] = lfsr_q[2] ^ lfsr_q[3] ^ lfsr_q[8] ^ lfsr_q[11] ^ lfsr_q[15] ^ lfsr_q[17] ^ lfsr_q[18] ^ lfsr_q[19] ^ lfsr_q[21] ^ lfsr_q[22] ^ lfsr_q[28] ^ lfsr_q[29] ^ lfsr_q[31] ^ data_in[2] ^ data_in[3] ^ data_in[8] ^ data_in[11] ^ data_in[15] ^ data_in[17] ^ data_in[18] ^ data_in[19] ^ data_in[21] ^ data_in[22] ^ data_in[28] ^ data_in[29] ^ data_in[31]; lfsr_c[26] = lfsr_q[0] ^ lfsr_q[3] ^ lfsr_q[4] ^ lfsr_q[6] ^ lfsr_q[10] ^ lfsr_q[18] ^ lfsr_q[19] ^ lfsr_q[20] ^ lfsr_q[22] ^ lfsr_q[23] ^ lfsr_q[24] ^ lfsr_q[25] ^ lfsr_q[26] ^ lfsr_q[28] ^ lfsr_q[31] ^ data_in[0] ^ data_in[3] ^ data_in[4] ^ data_in[6] ^ data_in[10] ^ data_in[18] ^ data_in[19] ^ data_in[20] ^ data_in[22] ^ data_in[23] ^ data_in[24] ^ data_in[25] ^ data_in[26] ^ data_in[28] ^ data_in[31]; lfsr_c[27] = lfsr_q[1] ^ lfsr_q[4] ^ lfsr_q[5] ^ lfsr_q[7] ^ lfsr_q[11] ^ lfsr_q[19] ^ lfsr_q[20] ^ lfsr_q[21] ^ lfsr_q[23] ^ lfsr_q[24] ^ lfsr_q[25] ^ lfsr_q[26] ^ lfsr_q[27] ^ lfsr_q[29] ^ data_in[1] ^ data_in[4] ^ data_in[5] ^ data_in[7] ^ data_in[11] ^ data_in[19] ^ data_in[20] ^ data_in[21] ^ data_in[23] ^ data_in[24] ^ data_in[25] ^ data_in[26] ^ data_in[27] ^ data_in[29]; lfsr_c[28] = lfsr_q[2] ^ lfsr_q[5] ^ lfsr_q[6] ^ lfsr_q[8] ^ lfsr_q[12] ^ lfsr_q[20] ^ lfsr_q[21] ^ lfsr_q[22] ^ lfsr_q[24] ^ lfsr_q[25] ^ lfsr_q[26] ^ lfsr_q[27] ^ lfsr_q[28] ^ lfsr_q[30] ^ data_in[2] ^ data_in[5] ^ data_in[6] ^ data_in[8] ^ data_in[12] ^ data_in[20] ^ data_in[21] ^ data_in[22] ^ data_in[24] ^ data_in[25] ^ data_in[26] ^ data_in[27] ^ data_in[28] ^ data_in[30]; lfsr_c[29] = lfsr_q[3] ^ lfsr_q[6] ^ lfsr_q[7] ^ lfsr_q[9] ^ lfsr_q[13] ^ lfsr_q[21] ^ lfsr_q[22] ^ lfsr_q[23] ^ lfsr_q[25] ^ lfsr_q[26] ^ lfsr_q[27] ^ lfsr_q[28] ^ lfsr_q[29] ^ lfsr_q[31] ^ data_in[3] ^ data_in[6] ^ data_in[7] ^ data_in[9] ^ data_in[13] ^ data_in[21] ^ data_in[22] ^ data_in[23] ^ data_in[25] ^ data_in[26] ^ data_in[27] ^ data_in[28] ^ data_in[29] ^ data_in[31]; lfsr_c[30] = lfsr_q[4] ^ lfsr_q[7] ^ lfsr_q[8] ^ lfsr_q[10] ^ lfsr_q[14] ^ lfsr_q[22] ^ lfsr_q[23] ^ lfsr_q[24] ^ lfsr_q[26] ^ lfsr_q[27] ^ lfsr_q[28] ^ lfsr_q[29] ^ lfsr_q[30] ^ data_in[4] ^ data_in[7] ^ data_in[8] ^ data_in[10] ^ data_in[14] ^ data_in[22] ^ data_in[23] ^ data_in[24] ^ data_in[26] ^ data_in[27] ^ data_in[28] ^ data_in[29] ^ data_in[30]; lfsr_c[31] = lfsr_q[5] ^ lfsr_q[8] ^ lfsr_q[9] ^ lfsr_q[11] ^ lfsr_q[15] ^ lfsr_q[23] ^ lfsr_q[24] ^ lfsr_q[25] ^ lfsr_q[27] ^ lfsr_q[28] ^ lfsr_q[29] ^ lfsr_q[30] ^ lfsr_q[31] ^ data_in[5] ^ data_in[8] ^ data_in[9] ^ data_in[11] ^ data_in[15] ^ data_in[23] ^ data_in[24] ^ data_in[25] ^ data_in[27] ^ data_in[28] ^ data_in[29] ^ data_in[30] ^ data_in[31]; end // always always @(posedge clk, posedge rst) begin if(rst) begin lfsr_q <= {32{1'b1}}; end else begin lfsr_q <= crc_en ? lfsr_c : lfsr_q; end end // always endmodule // crc i ve written test bench as follows `timescale 1ns / 1ps //////////////////////////////////////////////////////////////////////// //////// // Company: // Engineer: // // Create Date: 10:56:09 02/14/2016 // Design Name: crc // Module Name: C:/Users/DINITA/Desktop/ajit_xilinx/14-02-16/crc32bit/tb.v // Project Name: crc32bit // Target Device: // Tool versions: // Description: // // Verilog Test Fixture created by ISE for module: crc // // Dependencies: // // Revision: // Revision 0.01 - File Created // Additional Comments: // //////////////////////////////////////////////////////////////////////// //////// module tb_v; // Inputs reg [31:0] data_in; reg crc_en; reg rst; reg clk; // Outputs wire [31:0] crc_out; // Instantiate the Unit Under Test (UUT) crc uut ( .data_in(data_in), .crc_en(crc_en), .crc_out(crc_out), .rst(rst), .clk(clk) ); initial begin // Initialize Inputs #1 clk = 0; #1 crc_en = 0; #1 rst=0; data_in =32'h0000000000000000; forever begin data_in =32'h01234567891234567; #1 clk = ~clk; #1 rst = ~rst; #1 crc_en = ~crc_en; $finish; end // Wait 100 ns for global reset to finish #1000 $stop; // Add stimulus here end initial $monitor("At time %2t, crc_en = %d, rst = %d, data_in = %d, crc_out = %d", $time, crc_en, rst, data_in, crc_out); endmodule i didnt get correct waveform please help me thanks!!!!
Re: Please help me in writing correct verilog test bench code for parallel crc32 with 32 bit data wi
First read the rules about posting, especially the ones about how to post and format source code. Your test bench terminiates before anything can happen. Even without the $finish you toggle reset and enable all the time. Your crc mdoule can't do anything because of that.
Re: Please help me in writing correct verilog test bench code for parallel crc32 with 32 bit data wi
Ajit S. wrote: > i ve written verilog code for crc32 Sure? It looks to me like you copied the Verilog code from http://www.outputlogic.com and you ripped of the disclaimer. You can be pretty sure, that even your teacher knows that website... > i didnt get correct waveform What do you expect? And what do you get instead?
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