main.lst

用于单片机的开发 用modbus协议 实现上位机与下位机的通讯

C51 COMPILER V7.06   MAIN                                                                  03/16/2005 16:48:06 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE MAIN
OBJECT MODULE PLACED IN main.OBJ
COMPILER INVOKED BY: D:\Keil\C51\BIN\C51.EXE main.c BROWSE NOAREGS DEBUG OBJECTEXTEND

stmt level    source

   1          #include "main.h"
   2          
   3          /******************************
   4          微控电子 www.mcuc.cn
   5          modbus RTU 的C51程序 
   6          单片机89S52
   7          通信波特率 9600 8位数据 1位停止位 偶校验 485通位接口
   8          单片机控制板地址 localAddr(变量)
   9          通信可设置数据的地址：
  10          字地址 0 - 255 (只取16位的低8位)
  11          位地址 0 - 255 (只取16位的低8位)
  12          *******************************/
  13          
  14          uint32  dwTickCount,dwIntTick;  //时钟
  15          uint8   idata sendBuf[16],receBuf[16]; //发送接收缓冲区
  16          uint8   idata checkoutError;    // ==2 偶校验错  
  17          uint8   idata receTimeOut;              //接收超时
  18          uint8   idata c10ms;                    //10ms 计时
  19          bit             b1ms,bt1ms,b10ms,bt10ms,b100ms,bt100ms; //定时标志位
  20          
  21          // 串行中断程序
  22          void commIntProc() interrupt 4
  23          {
  24   1              if(TI)
  25   1              {
  26   2                      TI = 0; 
  27   2                      if(sendPosi < sendCount) 
  28   2                      {
  29   3                              sendPosi++;
  30   3                              ACC = sendBuf[sendPosi];
  31   3                              TB8 = P;        //加上校验位
  32   3                              SBUF = sendBuf[sendPosi];
  33   3                      }
  34   2                      else
  35   2                      {
  36   3                              b485Send = 0;    //发送完后将485置于接收状态
  37   3                              receCount = 0;   //清接收地址偏移寄存器
  38   3                              checkoutError = 0;
  39   3                      }
  40   2              }
  41   1              else if(RI)
  42   1              {
  43   2                      RI = 0;
  44   2                      receTimeOut = 10;    //通讯超时值
  45   2                      receBuf[receCount] = SBUF;
  46   2                      ACC = receBuf[receCount];
  47   2                      if(P != RB8)
  48   2                              checkoutError = 2;      //偶校验出错
  49   2                      receCount++;          //接收地址偏移寄存器加1
  50   2                      receCount &= 0x0f;    //最多一次只能接收16个字节
  51   2              }
  52   1      
  53   1      }   // void CommIntProc()
  54          
  55          //定时器0 1ms 中断
C51 COMPILER V7.06   MAIN                                                                  03/16/2005 16:48:06 PAGE 2   

  56          void timer0IntProc() interrupt 1
  57          {
  58   1              TL0 = TIMER_LOW; 
  59   1          TH0 = TIMER_HIGHT;
  60   1          dwIntTick++;
  61   1              bt1ms = 1;
  62   1          c10ms++;
  63   1          if(c10ms >= 10) 
  64   1          {
  65   2              c10ms = 0;      //10ms计时器清零
  66   2              bt10ms = 1;
  67   2          }
  68   1      }   // void Timer0IntProc()
  69          
  70          //外部中断0
  71          void intEx0Proc(void) interrupt 0
  72          {
  73   1      
  74   1      }
  75          
  76          //计数器1中断
  77          void counter1IntProc(void) interrupt 3 using 1
  78          {
  79   1      
  80   1      }
  81          
  82          
  83          //定时处理
  84          void timeProc(void)
  85          {
  86   1              static uint8 c200ms;
  87   1      
  88   1          bWatchDog = ~ bWatchDog;    //看门狗取反
  89   1              b1ms = 0;
  90   1              b10ms = 0;
  91   1              b100ms = 0;
  92   1              
  93   1              ET0 = 0;
  94   1              dwTickCount = dwIntTick;
  95   1              ET0 = 1;
  96   1      
  97   1              if(bt1ms)
  98   1              {
  99   2                      bt1ms = 0;
 100   2                      b1ms = 1;
 101   2      
 102   2              if(receTimeOut>0)
 103   2              {
 104   3                  receTimeOut--;
 105   3                  if(receTimeOut==0 && receCount>0)   //判断通讯接收是否超时
 106   3                  {
 107   4                      b485Send = 0;       //将485置为接收状态
 108   4                      receCount = 0;      //将接收地址偏移寄存器清零
 109   4                                      checkoutError = 0;
 110   4                  }
 111   3              }
 112   2              }
 113   1              
 114   1              if(bt100ms)
 115   1              {
 116   2                      bt100ms = 0;
 117   2                      b100ms = 1;
C51 COMPILER V7.06   MAIN                                                                  03/16/2005 16:48:06 PAGE 3   

 118   2              }
 119   1          if(bt10ms)      //判断中断10ms标志位是否1
 120   1          {
 121   2              bt10ms = 0;     //清中断10ms标志位
 122   2                      b10ms = 1;
 123   2      
 124   2              c200ms++;                   //200ms计时器加1
 125   2              if(c200ms >= 20)            //判断是否计时到200ms
 126   2              {
 127   3                  c200ms = 0;             //清200ms计时器
 128   3                  bRunLED = ~bRunLED;     //取反运行指示灯          
 129   3              }
 130   2          }
 131   1      }   // void TimerProc(void)
 132          
 133          //初始化串口
 134          void initUart(void)
 135          {
 136   1              //T2 用于波特率 9600
 137   1              T2CON = 0x30;
 138   1              RCAP2H = 0xff;
 139   1              RCAP2L = 0xb8;
 140   1              TR2 = 1;
 141   1      
 142   1              //偶校验                                                
 143   1              SCON = 0xd0;
 144   1          PCON = 0;
 145   1          ES = 1;
 146   1      }//void initUart(void)
 147          
 148          //初始化中断
 149          void initInt(void)
 150          {
 151   1              TMOD = 0x51;
 152   1              TH0 = TIMER_HIGHT;
 153   1              TL0 = TIMER_LOW;
 154   1              TR0 = 1;        
 155   1          ET0 = 1;
 156   1              TH1 = 0;                        //9600
 157   1          TL1 = 0;
 158   1              TR1 = 0;                        //定时器1用于计数定时器2用于波特
 159   1              ET1 = 1;
 160   1              //PT1 = 1;
 161   1      
 162   1              IT0 = 1;        
 163   1          IT1 = 1;
 164   1              EX0 = 0;        
 165   1              PX0 = 1;
 166   1          EX1 = 0;
 167   1      
 168   1              initUart();
 169   1      
 170   1              EA = 1;         
 171   1      }   // void initInt(void)
 172          
 173          //初始化
 174          void initProg(void)
 175          {       
 176   1              initInt();
 177   1              b485Send = 0;
 178   1      }
 179          
C51 COMPILER V7.06   MAIN                                                                  03/16/2005 16:48:06 PAGE 4   

 180          void main(void)
 181          {
 182   1              initProg();
 183   1      
 184   1              while(1)
 185   1              {
 186   2                      timeProc();
 187   2                      checkComm0Modbus();
 188   2              }
 189   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    313    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      9    ----
   IDATA SIZE       =     35    ----
   BIT SIZE         =      6    ----
END OF MODULE INFORMATION.


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