crc.lst

该工程是自己在KEIL环境下写的关于C8051F020的Bootloader,调试成功

C51 COMPILER V8.08   CRC                                                                   12/07/2007 14:43:00 PAGE 1   


C51 COMPILER V8.08, COMPILATION OF MODULE CRC
OBJECT MODULE PLACED IN CRC.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE CRC.c LARGE OPTIMIZE(0,SPEED) BROWSE DEBUG OBJECTEXTEND

line level    source

   1          
   2          #include "includes.h"
   3          
   4          
   5          UINT16 CRC16Cal(UINT8 *ptr, UINT16 len) 
   6          {
   7   1          UINT8 i;
   8   1          UINT16 crc=0;
   9   1          while(len--!=0) {
  10   2              for(i=0x80; i!=0; i/=2) {
  11   3                  if((crc&0x8000)!=0){//余式CRC 乘以2 再求CRC
  12   4                              crc*=2;
  13   4                                  crc^=0x1021;
  14   4                          }  
  15   3                  else{
  16   4                              crc*=2;
  17   4                          }
  18   3                  if((*ptr&i)!=0){// 再加上本位的CRC
  19   4                              crc^=0x1021;  
  20   4                  }
  21   3              }
  22   2              ptr++;
  23   2          }
  24   1          return(crc);
  25   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    238    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =      8    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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