crc8.lst

一个循冗余校验的程序

C51 COMPILER V8.01   CRC8                                                                  04/16/2007 19:36:18 PAGE 1   


C51 COMPILER V8.01, COMPILATION OF MODULE CRC8
OBJECT MODULE PLACED IN crc8.OBJ
COMPILER INVOKED BY: D:\Program Files\Keil\C51\BIN\C51.EXE crc8.c ROM(SMALL) BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include<reg52.h>
   2          
   3          #define byte    unsigned        char    
   4          #define word    unsigned        int             
   5          
   6          //code  byte    CRCC[8] = {0x28,0xca,0x4e,0xfa,0x00,0x00,0x00,0x6f};
   7          //code  byte    CRCC[8] = {0x28,0x5b,0x1a,0x21,0x00,0x00,0x00,0xf6};
   8          code    byte    CRC[8] = {0x28,0xd8,0x53,0x5a,0x00,0x00,0x00,0x63};
   9          
  10          //data  byte    crc;    
  11          
  12          byte    crc8(byte       *Index,byte     len)
  13          {
  14   1              byte    i,j;
  15   1              byte    crc = 0x00;
  16   1              for(i = 0;i < len-1;i++)
  17   1              {
  18   2                      crc = crc^Index[i];
  19   2                      for(j = 0;j < 8;j++)
  20   2                      {
  21   3                              if(crc & 0x01)  crc = (crc >> 1)^0x8c;
  22   3                              else    crc = crc>>1;
  23   3                      }
  24   2              }
  25   1              if(crc == Index[7])             return 1;
  26   1              else    return  0;
  27   1      }
  28          
  29          void    main(void)
  30          {       
  31   1              byte    result;    
  32   1              
  33   1              P1 = 0x00;
  34   1              result = crc8(CRC,8); 
  35   1              if(result)      P1 = 0x01;
  36   1              while(1);               
  37   1      
  38   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    100    ----
   CONSTANT SIZE    =      8    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       4
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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