fastcrc16.lst

无线龙ZigBee模块CC1010的接收－发送程序。

C51 COMPILER V7.06   FASTCRC16                                                             04/13/2005 12:55:51 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE FASTCRC16
OBJECT MODULE PLACED IN fastcrc16.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE fastcrc16.c OMF2 BROWSE INCDIR(..\..\..\..\Include;..\..\..\..\lib) DEFINE(
                    -FREQ433) DEBUG

stmt level    source

   1          /*****************************************************************************
   2           *                                                                           *
   3           *        **********                                                         *
   4           *       ************                                                        *
   5           *      ***        ***                                                       *
   6           *      ***   +++   ***                                                      *
   7           *      ***   + +   ***                                                      *
   8           *      ***   +                            CHIPCON CC1010                    *
   9           *      ***   + +   ***                     CUL - fastcrc                    *
  10           *      ***   +++   ***                                                      *
  11           *      ***       ***                                                        *
  12           *       ***********                                                         *
  13           *        *********                                                          *
  14           *                                                                           *
  15           *****************************************************************************
  16           *                                                                           *
  17           *****************************************************************************
  18           * Author:              JOL                                                  *
  19           *****************************************************************************
  20           * Revision history:                                                         *
  21           *                                                                           *
  22           * $Log: fastcrc16.c,v $
  23           * Revision 1.1  2002/10/14 12:26:11  tos
  24           * Initial version in CVS.
  25           *
  26           *                                                                           *
  27           ****************************************************************************/
  28          
  29          #include <chipcon/cul.h>
  30          
  31          
  32          //----------------------------------------------------------------------------
  33          // CRC16 LUT 
  34          // newCRC = (oldCRC << 8) ^ crc16LUT[((byte)(crcReg >> 8)) ^ dataByte]
  35          //----------------------------------------------------------------------------
  36          word code crc16LUT[256] = {
  37              0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
  38              0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
  39              0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
  40              0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
  41              0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
  42              0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
  43              0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
  44              0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
  45              0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
  46              0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
  47              0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
  48              0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
  49              0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
  50              0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
  51              0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
  52              0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
  53              0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
  54              0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
C51 COMPILER V7.06   FASTCRC16                                                             04/13/2005 12:55:51 PAGE 2   

  55              0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
  56              0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
  57              0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
  58              0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
  59              0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
  60              0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
  61              0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
  62              0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
  63              0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
  64              0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
  65              0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
  66              0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
  67              0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
  68              0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
  69          }; // crc16LUT
  70          
  71          
  72          
  73          
  74          //----------------------------------------------------------------------------
  75          //      word culFastCRC16(crcData, crcReg)
  76          //
  77          //      Description:
  78          //              A CRC-16 (CCITT) implementation optimized for fast execution.
  79          //              The function should be called once for each byte in the data
  80          //              the CRC is to be performed on. Before the invocation on the first byte
  81          //              the FAST_CRC16_INIT() macro should be called. This final CRC-value 
  82          //              should be added at the end of the data to facilitate a later CRC  
  83          //              check. During checking the check should be performed on all the data 
  84          //              AND the CRC-16 value appended to it. The data is intact if the value 
  85          //              returned is 0.
  86          //
  87          //      Arguments:
  88          //              byte crcData
  89          //                      The data to perform the CRC-16 operation on.
  90          //              word crcReg
  91          //                      The current value of the CRC register. For each additional byte 
  92          //                      the value returned for the last invocation should be supplied.
  93          //
  94          //      Return value:
  95          //              The updated value of the CRC16 register. This corresponds to the 
  96          //              CRC-16 of the data supplied so far. During CRC checking, after working
  97          //              through all the data and the appended CRC-16 value, the value will be
  98          //              0 if the data is intact.
  99          //----------------------------------------------------------------------------
 100          word culFastCRC16(byte crcData, word crcReg) {
 101   1          return (crcReg << 8) ^ crc16LUT[((byte)(crcReg >> 8)) ^ crcData];
 102   1      } // culFastCRC16
 103          
 104          
 105          
 106          
 107          //----------------------------------------------------------------------------
 108          //  word culFastCRC16Block(byte *crcData, word length, word crcReg)
 109          //
 110          //      Description:
 111          //              An implementation of the above function (culFastCRC16) that operates
 112          //      on blocks of data instead of single bytes.
 113          //
 114          //      Extra arguments:
 115          //      word length
 116          //          The number of bytes in this block (crcData[]).
C51 COMPILER V7.06   FASTCRC16                                                             04/13/2005 12:55:51 PAGE 3   

 117          //----------------------------------------------------------------------------
 118          word culFastCRC16Block(byte *crcData, word length, word crcReg) {
 119   1          word i;
 120   1          
 121   1          for (i = 0; i < length; i++) {
 122   2              crcReg = (crcReg << 8) ^ crc16LUT[((byte)(crcReg >> 8)) ^ crcData[i]];
 123   2          }    
 124   1          return crcReg;
 125   1      } // culFastCRC16Block


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    116    ----
   CONSTANT SIZE    =    512    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       9
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
   EDATA SIZE       =   ----    ----
   HDATA SIZE       =   ----    ----
   XDATA CONST SIZE =   ----    ----
   FAR CONST SIZE   =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)