| // CRC32 based on https://msdn.microsoft.com/en-us/library/dd905031.aspx |
| // |
| // |
| // |
| // |
| // |
| |
| module crc32 (input [7:0] din, input clk, input rst_n, output [31:0] dout); |
| |
| reg [31:0] crctbl [255:0]; |
| reg [31:0] crc; |
| |
| initial |
| begin |
| crctbl[0] <= 32'h00000000; |
| crctbl[1] <= 32'h77073096; |
| crctbl[2] <= 32'hEE0E612C; |
| crctbl[3] <= 32'h990951BA; |
| crctbl[4] <= 32'h076DC419; |
| crctbl[5] <= 32'h706AF48F; |
| crctbl[6] <= 32'hE963A535; |
| crctbl[7] <= 32'h9E6495A3; |
| crctbl[8] <= 32'h0EDB8832; |
| crctbl[9] <= 32'h79DCB8A4; |
| crctbl[10] <= 32'hE0D5E91E; |
| crctbl[11] <= 32'h97D2D988; |
| crctbl[12] <= 32'h09B64C2B; |
| crctbl[13] <= 32'h7EB17CBD; |
| crctbl[14] <= 32'hE7B82D07; |
| crctbl[15] <= 32'h90BF1D91; |
| crctbl[16] <= 32'h1DB71064; |
| crctbl[17] <= 32'h6AB020F2; |
| crctbl[18] <= 32'hF3B97148; |
| crctbl[19] <= 32'h84BE41DE; |
| crctbl[20] <= 32'h1ADAD47D; |
| crctbl[21] <= 32'h6DDDE4EB; |
| crctbl[22] <= 32'hF4D4B551; |
| crctbl[23] <= 32'h83D385C7; |
| crctbl[24] <= 32'h136C9856; |
| crctbl[25] <= 32'h646BA8C0; |
| crctbl[26] <= 32'hFD62F97A; |
| crctbl[27] <= 32'h8A65C9EC; |
| crctbl[28] <= 32'h14015C4F; |
| crctbl[29] <= 32'h63066CD9; |
| crctbl[30] <= 32'hFA0F3D63; |
| crctbl[31] <= 32'h8D080DF5; |
| crctbl[32] <= 32'h3B6E20C8; |
| crctbl[33] <= 32'h4C69105E; |
| crctbl[34] <= 32'hD56041E4; |
| crctbl[35] <= 32'hA2677172; |
| crctbl[36] <= 32'h3C03E4D1; |
| crctbl[37] <= 32'h4B04D447; |
| crctbl[38] <= 32'hD20D85FD; |
| crctbl[39] <= 32'hA50AB56B; |
| crctbl[40] <= 32'h35B5A8FA; |
| crctbl[41] <= 32'h42B2986C; |
| crctbl[42] <= 32'hDBBBC9D6; |
| crctbl[43] <= 32'hACBCF940; |
| crctbl[44] <= 32'h32D86CE3; |
| crctbl[45] <= 32'h45DF5C75; |
| crctbl[46] <= 32'hDCD60DCF; |
| crctbl[47] <= 32'hABD13D59; |
| crctbl[48] <= 32'h26D930AC; |
| crctbl[49] <= 32'h51DE003A; |
| crctbl[50] <= 32'hC8D75180; |
| crctbl[51] <= 32'hBFD06116; |
| crctbl[52] <= 32'h21B4F4B5; |
| crctbl[53] <= 32'h56B3C423; |
| crctbl[54] <= 32'hCFBA9599; |
| crctbl[55] <= 32'hB8BDA50F; |
| crctbl[56] <= 32'h2802B89E; |
| crctbl[57] <= 32'h5F058808; |
| crctbl[58] <= 32'hC60CD9B2; |
| crctbl[59] <= 32'hB10BE924; |
| crctbl[60] <= 32'h2F6F7C87; |
| crctbl[61] <= 32'h58684C11; |
| crctbl[62] <= 32'hC1611DAB; |
| crctbl[63] <= 32'hB6662D3D; |
| crctbl[64] <= 32'h76DC4190; |
| crctbl[65] <= 32'h01DB7106; |
| crctbl[66] <= 32'h98D220BC; |
| crctbl[67] <= 32'hEFD5102A; |
| crctbl[68] <= 32'h71B18589; |
| crctbl[69] <= 32'h06B6B51F; |
| crctbl[70] <= 32'h9FBFE4A5; |
| crctbl[71] <= 32'hE8B8D433; |
| crctbl[72] <= 32'h7807C9A2; |
| crctbl[73] <= 32'h0F00F934; |
| crctbl[74] <= 32'h9609A88E; |
| crctbl[75] <= 32'hE10E9818; |
| crctbl[76] <= 32'h7F6A0DBB; |
| crctbl[77] <= 32'h086D3D2D; |
| crctbl[78] <= 32'h91646C97; |
| crctbl[79] <= 32'hE6635C01; |
| crctbl[80] <= 32'h6B6B51F4; |
| crctbl[81] <= 32'h1C6C6162; |
| crctbl[82] <= 32'h856530D8; |
| crctbl[83] <= 32'hF262004E; |
| crctbl[84] <= 32'h6C0695ED; |
| crctbl[85] <= 32'h1B01A57B; |
| crctbl[86] <= 32'h8208F4C1; |
| crctbl[87] <= 32'hF50FC457; |
| crctbl[88] <= 32'h65B0D9C6; |
| crctbl[89] <= 32'h12B7E950; |
| crctbl[90] <= 32'h8BBEB8EA; |
| crctbl[91] <= 32'hFCB9887C; |
| crctbl[92] <= 32'h62DD1DDF; |
| crctbl[93] <= 32'h15DA2D49; |
| crctbl[94] <= 32'h8CD37CF3; |
| crctbl[95] <= 32'hFBD44C65; |
| crctbl[96] <= 32'h4DB26158; |
| crctbl[97] <= 32'h3AB551CE; |
| crctbl[98] <= 32'hA3BC0074; |
| crctbl[99] <= 32'hD4BB30E2; |
| crctbl[100] <= 32'h4ADFA541; |
| crctbl[101] <= 32'h3DD895D7; |
| crctbl[102] <= 32'hA4D1C46D; |
| crctbl[103] <= 32'hD3D6F4FB; |
| crctbl[104] <= 32'h4369E96A; |
| crctbl[105] <= 32'h346ED9FC; |
| crctbl[106] <= 32'hAD678846; |
| crctbl[107] <= 32'hDA60B8D0; |
| crctbl[108] <= 32'h44042D73; |
| crctbl[109] <= 32'h33031DE5; |
| crctbl[110] <= 32'hAA0A4C5F; |
| crctbl[111] <= 32'hDD0D7CC9; |
| crctbl[112] <= 32'h5005713C; |
| crctbl[113] <= 32'h270241AA; |
| crctbl[114] <= 32'hBE0B1010; |
| crctbl[115] <= 32'hC90C2086; |
| crctbl[116] <= 32'h5768B525; |
| crctbl[117] <= 32'h206F85B3; |
| crctbl[118] <= 32'hB966D409; |
| crctbl[119] <= 32'hCE61E49F; |
| crctbl[120] <= 32'h5EDEF90E; |
| crctbl[121] <= 32'h29D9C998; |
| crctbl[122] <= 32'hB0D09822; |
| crctbl[123] <= 32'hC7D7A8B4; |
| crctbl[124] <= 32'h59B33D17; |
| crctbl[125] <= 32'h2EB40D81; |
| crctbl[126] <= 32'hB7BD5C3B; |
| crctbl[127] <= 32'hC0BA6CAD; |
| crctbl[128] <= 32'hEDB88320; |
| crctbl[129] <= 32'h9ABFB3B6; |
| crctbl[130] <= 32'h03B6E20C; |
| crctbl[131] <= 32'h74B1D29A; |
| crctbl[132] <= 32'hEAD54739; |
| crctbl[133] <= 32'h9DD277AF; |
| crctbl[134] <= 32'h04DB2615; |
| crctbl[135] <= 32'h73DC1683; |
| crctbl[136] <= 32'hE3630B12; |
| crctbl[137] <= 32'h94643B84; |
| crctbl[138] <= 32'h0D6D6A3E; |
| crctbl[139] <= 32'h7A6A5AA8; |
| crctbl[140] <= 32'hE40ECF0B; |
| crctbl[141] <= 32'h9309FF9D; |
| crctbl[142] <= 32'h0A00AE27; |
| crctbl[143] <= 32'h7D079EB1; |
| crctbl[144] <= 32'hF00F9344; |
| crctbl[145] <= 32'h8708A3D2; |
| crctbl[146] <= 32'h1E01F268; |
| crctbl[147] <= 32'h6906C2FE; |
| crctbl[148] <= 32'hF762575D; |
| crctbl[149] <= 32'h806567CB; |
| crctbl[150] <= 32'h196C3671; |
| crctbl[151] <= 32'h6E6B06E7; |
| crctbl[152] <= 32'hFED41B76; |
| crctbl[153] <= 32'h89D32BE0; |
| crctbl[154] <= 32'h10DA7A5A; |
| crctbl[155] <= 32'h67DD4ACC; |
| crctbl[156] <= 32'hF9B9DF6F; |
| crctbl[157] <= 32'h8EBEEFF9; |
| crctbl[158] <= 32'h17B7BE43; |
| crctbl[159] <= 32'h60B08ED5; |
| crctbl[160] <= 32'hD6D6A3E8; |
| crctbl[161] <= 32'hA1D1937E; |
| crctbl[162] <= 32'h38D8C2C4; |
| crctbl[163] <= 32'h4FDFF252; |
| crctbl[164] <= 32'hD1BB67F1; |
| crctbl[165] <= 32'hA6BC5767; |
| crctbl[166] <= 32'h3FB506DD; |
| crctbl[167] <= 32'h48B2364B; |
| crctbl[168] <= 32'hD80D2BDA; |
| crctbl[169] <= 32'hAF0A1B4C; |
| crctbl[170] <= 32'h36034AF6; |
| crctbl[171] <= 32'h41047A60; |
| crctbl[172] <= 32'hDF60EFC3; |
| crctbl[173] <= 32'hA867DF55; |
| crctbl[174] <= 32'h316E8EEF; |
| crctbl[175] <= 32'h4669BE79; |
| crctbl[176] <= 32'hCB61B38C; |
| crctbl[177] <= 32'hBC66831A; |
| crctbl[178] <= 32'h256FD2A0; |
| crctbl[179] <= 32'h5268E236; |
| crctbl[180] <= 32'hCC0C7795; |
| crctbl[181] <= 32'hBB0B4703; |
| crctbl[182] <= 32'h220216B9; |
| crctbl[183] <= 32'h5505262F; |
| crctbl[184] <= 32'hC5BA3BBE; |
| crctbl[185] <= 32'hB2BD0B28; |
| crctbl[186] <= 32'h2BB45A92; |
| crctbl[187] <= 32'h5CB36A04; |
| crctbl[188] <= 32'hC2D7FFA7; |
| crctbl[189] <= 32'hB5D0CF31; |
| crctbl[190] <= 32'h2CD99E8B; |
| crctbl[191] <= 32'h5BDEAE1D; |
| crctbl[192] <= 32'h9B64C2B0; |
| crctbl[193] <= 32'hEC63F226; |
| crctbl[194] <= 32'h756AA39C; |
| crctbl[195] <= 32'h026D930A; |
| crctbl[196] <= 32'h9C0906A9; |
| crctbl[197] <= 32'hEB0E363F; |
| crctbl[198] <= 32'h72076785; |
| crctbl[199] <= 32'h05005713; |
| crctbl[200] <= 32'h95BF4A82; |
| crctbl[201] <= 32'hE2B87A14; |
| crctbl[202] <= 32'h7BB12BAE; |
| crctbl[203] <= 32'h0CB61B38; |
| crctbl[204] <= 32'h92D28E9B; |
| crctbl[205] <= 32'hE5D5BE0D; |
| crctbl[206] <= 32'h7CDCEFB7; |
| crctbl[207] <= 32'h0BDBDF21; |
| crctbl[208] <= 32'h86D3D2D4; |
| crctbl[209] <= 32'hF1D4E242; |
| crctbl[210] <= 32'h68DDB3F8; |
| crctbl[211] <= 32'h1FDA836E; |
| crctbl[212] <= 32'h81BE16CD; |
| crctbl[213] <= 32'hF6B9265B; |
| crctbl[214] <= 32'h6FB077E1; |
| crctbl[215] <= 32'h18B74777; |
| crctbl[216] <= 32'h88085AE6; |
| crctbl[217] <= 32'hFF0F6A70; |
| crctbl[218] <= 32'h66063BCA; |
| crctbl[219] <= 32'h11010B5C; |
| crctbl[220] <= 32'h8F659EFF; |
| crctbl[221] <= 32'hF862AE69; |
| crctbl[222] <= 32'h616BFFD3; |
| crctbl[223] <= 32'h166CCF45; |
| crctbl[224] <= 32'hA00AE278; |
| crctbl[225] <= 32'hD70DD2EE; |
| crctbl[226] <= 32'h4E048354; |
| crctbl[227] <= 32'h3903B3C2; |
| crctbl[228] <= 32'hA7672661; |
| crctbl[229] <= 32'hD06016F7; |
| crctbl[230] <= 32'h4969474D; |
| crctbl[231] <= 32'h3E6E77DB; |
| crctbl[232] <= 32'hAED16A4A; |
| crctbl[233] <= 32'hD9D65ADC; |
| crctbl[234] <= 32'h40DF0B66; |
| crctbl[235] <= 32'h37D83BF0; |
| crctbl[236] <= 32'hA9BCAE53; |
| crctbl[237] <= 32'hDEBB9EC5; |
| crctbl[238] <= 32'h47B2CF7F; |
| crctbl[239] <= 32'h30B5FFE9; |
| crctbl[240] <= 32'hBDBDF21C; |
| crctbl[241] <= 32'hCABAC28A; |
| crctbl[242] <= 32'h53B39330; |
| crctbl[243] <= 32'h24B4A3A6; |
| crctbl[244] <= 32'hBAD03605; |
| crctbl[245] <= 32'hCDD70693; |
| crctbl[246] <= 32'h54DE5729; |
| crctbl[247] <= 32'h23D967BF; |
| crctbl[248] <= 32'hB3667A2E; |
| crctbl[249] <= 32'hC4614AB8; |
| crctbl[250] <= 32'h5D681B02; |
| crctbl[251] <= 32'h2A6F2B94; |
| crctbl[252] <= 32'hB40BBE37; |
| crctbl[253] <= 32'hC30C8EA1; |
| crctbl[254] <= 32'h5A05DF1B; |
| crctbl[255] <= 32'h2D02EF8D; |
| end |
| |
| always @(posedge clk) |
| begin |
| if (rst_n == 1'b0) |
| crc <= 32'hFFFFFFFF; |
| else |
| crc <= (crc >> 8) ^ crctbl[(crc[7:0] ^ din)]; |
| end |
| |
| assign dout = crc; |
| |
| endmodule |
