modbus.lst

移植到51单片机的UIP代码

C51 COMPILER V8.08   MODBUS                                                                05/13/2008 23:42:02 PAGE 1   


C51 COMPILER V8.08, COMPILATION OF MODULE MODBUS
OBJECT MODULE PLACED IN modbus.OBJ
COMPILER INVOKED BY: f:\Keil\C51\BIN\C51.EXE modbus.c LARGE BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /*******************************************************************************
   2           *                    MODBUS协议处理程序
   3           * 设计：付爱喜 
   4           * 日期：2003/07/28
   5           * 特别声明：内部的控制字由一个字节扩展为两个字节，数据格式为一起始位、8有效位、一停止位；
   6           * 数据采用CRC16校验，地址为0XFF时，为广播命令。
   7           *******************************************************************************/
   8           
   9          #define                 MODBUS_C
  10          
  11          #include "modbus.h" 
  12          //#include <reg52.h> 
  13          
  14          
  15          
  16          #if  CRC_MODE == SLOW
              /* 
               *函数性质；私有
               *入口；待遇运算数据缓冲，数据长度
               *出口：数据的CRC码
               *功能：对待遇运算的数据缓冲中给定长度的数据按0X11021的多项式求CRC码，并返回其CRC码
               */
               
              //速度最慢，但占用的程序空间最小 
              uint CalCRC(uchar *ptr, uchar len) 
              {
                      uchar i;
                      uint crc = 0;
                      while(len-- != 0) 
                      {
                              for(i = 0x80; i != 0; i /= 2) 
                              {
                                      if((crc & 0x8000) != 0 ) 
                                      {
                                              crc *= 2; 
                                              crc ^= 0x1021;
                                      } /* 余式CRC乘以2再求CRC */
                                      else 
                                      { 
                                              crc *= 2;
                                      }
                                      if((*ptr & i) != 0)
                                      {
                                               crc ^= 0x1021; /* 再加上本位的CRC */
                                      }
                              }
                              ptr++;
                      }
                      return(crc);
              }
              
              #elif CRC_MODE == FASTER
               
              //快速CRC算法
              uint CalCRC(uchar *ptr, uchar len) 
C51 COMPILER V8.08   MODBUS                                                                05/13/2008 23:42:02 PAGE 2   

              {
                      uint crc;
                      uchar da;
                      uint code crc_ta[256]={ /* CRC余式表 */
                      0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
                      0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
                      0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
                      0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
                      0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485, 
                      0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
                      0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
                      0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
                      0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
                      0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
                      0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
                      0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
                      0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
                      0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
                      0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
                      0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
                      0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
                      0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
                      0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
                      0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
                      0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
                      0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
                      0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
                      0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
                      0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
                      0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
                      0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
                      0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
                      0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
                      0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
                      0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
                      0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
                      };
              
                      crc = 0;
                      while(len-- != 0) 
                      {
                              da =(uchar) (crc/256);                  /* 以8位二进制数的形式暂存CRC的高8位 */
                              crc <<= 8;                                              /* 左移8位，相当于CRC的低8位乘以 */
                              crc     ^=      crc_ta[da^*ptr];                /* 高8位和当前字节相加后再查表求CRC ，再加上以前的CRC */
                              ptr++;
                      }
                      return(crc);
              }
              
              #else 
 106          //处在快速与慢速之间，占用的程序空间也不大。
 107          uint  CalCRC(uchar *ptr, uchar len) 
 108          {
 109   1              uint crc;
 110   1              uchar da;
 111   1              uint code crc_ta[16]={ /* CRC余式表 */
 112   1              0x0000,0x1021,0x2042,0x3063,0x4084,0x50a5,0x60c6,0x70e7,
 113   1              0x8108,0x9129,0xa14a,0xb16b,0xc18c,0xd1ad,0xe1ce,0xf1ef,
 114   1              };
 115   1      
 116   1              crc     = 0;
 117   1              while(len-- != 0) 
C51 COMPILER V8.08   MODBUS                                                                05/13/2008 23:42:02 PAGE 3   

 118   1              {
 119   2                      da = ((uchar)(crc/256))/16;             /* 暂存CRC的高四位 */
 120   2                      crc <<= 4;                                                      /* CRC右移4位，相当于取CRC的低12位）*/
 121   2                      crc ^= crc_ta[da^(*ptr/16)];            /* CRC的高4位和本字节的前半字节相加后查表计算CRC，
 122   2                                                                                              然后加上上一次CRC的余数 */
 123   2                      da = ((uchar)(crc/256))/16;             /* 暂存CRC的高4位 */
 124   2                      crc <<= 4;                                                      /* CRC右移4位， 相当于CRC的低12位） */
 125   2                      crc ^= crc_ta[da^(*ptr&0x0f)];          /* CRC的高4位和本字节的后半字节相加后查表计算CRC，
 126   2                                                                                              然后再加上上一次CRC的余数 */
 127   2                      ptr++;
 128   2              }
 129   1              return(crc);
 130   1      }
 131          
 132          #endif


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    187    ----
   CONSTANT SIZE    =     32    ----
   XDATA SIZE       =   ----       4
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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