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authorJosh Blum <josh@joshknows.com>2010-01-22 11:56:55 -0800
committerJosh Blum <josh@joshknows.com>2010-01-22 11:56:55 -0800
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parent8f2c33eab9396185df259639082b7d1618585973 (diff)
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Moved usrp2 fpga files into usrp2 subdir.
Diffstat (limited to 'control_lib/CRC16_D16.v')
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diff --git a/control_lib/CRC16_D16.v b/control_lib/CRC16_D16.v
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-///////////////////////////////////////////////////////////////////////
-// File: CRC16_D16.v
-// Date: Sun Jun 17 06:42:55 2007
-//
-// Copyright (C) 1999-2003 Easics NV.
-// 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 PROVIDED "AS IS" AND WITHOUT ANY EXPRESS
-// OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
-// WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
-//
-// Purpose: Verilog module containing a synthesizable CRC function
-// * polynomial: (0 5 12 16)
-// * data width: 16
-//
-// Info: tools@easics.be
-// http://www.easics.com
-///////////////////////////////////////////////////////////////////////
-
-
-module CRC16_D16
- (input [15:0] Data,
- input [15:0] CRC,
- output [15:0] NewCRC);
-
- assign NewCRC = nextCRC16_D16(Data,CRC);
-
- // polynomial: (0 5 12 16)
- // data width: 16
- // convention: the first serial data bit is D[15]
- function [15:0] nextCRC16_D16;
-
- input [15:0] Data;
- input [15:0] CRC;
-
- reg [15:0] D;
- reg [15:0] C;
- reg [15:0] NewCRC;
-
- begin
-
- D = Data;
- C = CRC;
-
- NewCRC[0] = D[12] ^ D[11] ^ D[8] ^ D[4] ^ D[0] ^ C[0] ^ C[4] ^
- C[8] ^ C[11] ^ C[12];
- NewCRC[1] = D[13] ^ D[12] ^ D[9] ^ D[5] ^ D[1] ^ C[1] ^ C[5] ^
- C[9] ^ C[12] ^ C[13];
- NewCRC[2] = D[14] ^ D[13] ^ D[10] ^ D[6] ^ D[2] ^ C[2] ^ C[6] ^
- C[10] ^ C[13] ^ C[14];
- NewCRC[3] = D[15] ^ D[14] ^ D[11] ^ D[7] ^ D[3] ^ C[3] ^ C[7] ^
- C[11] ^ C[14] ^ C[15];
- NewCRC[4] = D[15] ^ D[12] ^ D[8] ^ D[4] ^ C[4] ^ C[8] ^ C[12] ^
- C[15];
- NewCRC[5] = D[13] ^ D[12] ^ D[11] ^ D[9] ^ D[8] ^ D[5] ^ D[4] ^
- D[0] ^ C[0] ^ C[4] ^ C[5] ^ C[8] ^ C[9] ^ C[11] ^ C[12] ^
- C[13];
- NewCRC[6] = D[14] ^ D[13] ^ D[12] ^ D[10] ^ D[9] ^ D[6] ^ D[5] ^
- D[1] ^ C[1] ^ C[5] ^ C[6] ^ C[9] ^ C[10] ^ C[12] ^
- C[13] ^ C[14];
- NewCRC[7] = D[15] ^ D[14] ^ D[13] ^ D[11] ^ D[10] ^ D[7] ^ D[6] ^
- D[2] ^ C[2] ^ C[6] ^ C[7] ^ C[10] ^ C[11] ^ C[13] ^
- C[14] ^ C[15];
- NewCRC[8] = D[15] ^ D[14] ^ D[12] ^ D[11] ^ D[8] ^ D[7] ^ D[3] ^
- C[3] ^ C[7] ^ C[8] ^ C[11] ^ C[12] ^ C[14] ^ C[15];
- NewCRC[9] = D[15] ^ D[13] ^ D[12] ^ D[9] ^ D[8] ^ D[4] ^ C[4] ^
- C[8] ^ C[9] ^ C[12] ^ C[13] ^ C[15];
- NewCRC[10] = D[14] ^ D[13] ^ D[10] ^ D[9] ^ D[5] ^ C[5] ^ C[9] ^
- C[10] ^ C[13] ^ C[14];
- NewCRC[11] = D[15] ^ D[14] ^ D[11] ^ D[10] ^ D[6] ^ C[6] ^ C[10] ^
- C[11] ^ C[14] ^ C[15];
- NewCRC[12] = D[15] ^ D[8] ^ D[7] ^ D[4] ^ D[0] ^ C[0] ^ C[4] ^ C[7] ^
- C[8] ^ C[15];
- NewCRC[13] = D[9] ^ D[8] ^ D[5] ^ D[1] ^ C[1] ^ C[5] ^ C[8] ^ C[9];
- NewCRC[14] = D[10] ^ D[9] ^ D[6] ^ D[2] ^ C[2] ^ C[6] ^ C[9] ^ C[10];
- NewCRC[15] = D[11] ^ D[10] ^ D[7] ^ D[3] ^ C[3] ^ C[7] ^ C[10] ^
- C[11];
-
- nextCRC16_D16 = NewCRC;
-
- end
-
- endfunction
-
-endmodule
-