MODBUS程序，希望大家指正优点是着重

痛苦的滋味 · 发表于 2016-5-19 21:48:48

点击此处打开电路图ourdev_200557.pdf(文件大小:43K)

M64，14.7456M晶振
定时器中断时间为1s,如果发送间隔大于T1.5但小于T3.5的数据丢弃
与其他前辈的区别就是着重在时间上，其他的关于数据结构协议上的程序，参考论坛上的其他前辈的程序
如果参考其他前辈的程序冒犯了，请告之，我就删除

另外如果AMORK 和其他前辈同意并且确实有价值的话，我就将论坛上相关的整理成一个完整的程序给大家测试

SIGNAL(SIG_UART0_RECV)
{
      Com0_Receive_Data_Buffer[Com0_Receive_Cout]=UDR0;
      if(Com0_Receive_Cout<18)          Com0_Receive_Cout++;
Uart_Fin = 5;
      Rcvflag = 2;
      Uart_Start = 1;
}
SIGNAL (SIG_UART0_TRANS)
{
      Com0_Send_Data_Pointer++;
      Com0_Send_Data_Bytes--;
      if(Com0_Send_Data_Bytes>0)
   UDR0=*Com0_Send_Data_Pointer;
      else
      UCSR0B|=( 1<<RXEN0 );
}
INTERRUPT(SIG_OVERFLOW0)
{
      TCNT0 = 240; //reload counter value
      flag1ms = 1;
}
void timeProc(void)
{
      wdt_reset();
      if(flag1ms == 1)
      {
            flag1ms = 0;
            if(Uart_Start == 1)//串口开始接收数据
            {
                     if(Rcvflag>0) Rcvflag--;//1.5T的变量
                     if(Uart_Fin>0) Uart_Fin--;3.5T的变量
                     if(Rcvflag == 0)//Î´½áÊø¶ªÆú//1.5T的时间到了，记录长度
                     {
                              Com0_Receive_Cout15 = Com0_Receive_Cout;
                     }
                     if((Uart_Fin == 0)&&(Uart_Send==0))//½áÊø//3.5T的时间到
                     {
                              if(Com0_Receive_Data_Buffer[0]==Com0_Send_Data_Buffer[0])/////
                              {
                                    if(Com0_Receive_Cout15 == Com0_Receive_Cout)//判断接收的过程中有没有超过T1.5
                                    {
                                             Uart_End = 5;
                                             Uart_Send = 1;
                                    }
                                    else
                                    {
                                             Com0_Receive_Cout = 0;
                                    }
                              }
                              else
                              {
                                    Com0_Receive_Cout = 0;
                                    Uart_Start =0;
                              }
                     }
                     if(Uart_End > 0)//一桢数据结束，延长>T3.5发送
                     {
                              Uart_End--;
                              if(Uart_End == 0)
                              {
                                    Com0_Receive_CRCcouter=Com0_Receive_Cout;
                                    Com0_Receive_Cout = 0;
                                    Com0_Communication( ) ;//该部分可参考论坛上的相关程序
                                    Uart_Start =0;
                                    Uart_Send = 0;
                              }
                     }
            }
      }
}
void main (void)
{
      unsigned char Sumad,kk;
      cli();
      initTimer();
      sei();
      while(1)
      {
            timeProc();

      }
}
void initTimer(void)
{
      TCCR0 = 0x00; //stop
      TCNT0 = 240; //set count
      TIMSK |=0X01;
      TCCR0 = 0x07; //start timer

}
void Com0_Communication(void)
{
      unsigned short crcresult;
      unsigned char temp[2];
      crcresult= getCRC16(Com0_Receive_Data_Buffer,Com0_Receive_CRCcouter-2);
      temp[1]=crcresult & 0xff;
      temp[0]=(crcresult >> 8) & 0xff;
      if((Com0_Receive_Data_Buffer[Com0_Receive_CRCcouter-1]==temp[0])&&(Com0_Receive_Data_Buffer[Com0_Receive_CRCcouter-2]==temp[1]))
      {
      PORTB^=0x20;
            switch(Com0_Receive_Data_Buffer[1])
      {
         case 0x01:
                                             Modbus_Function_1();
                                             break;
         case 0x03:
                     Modbus_Function_3();
                     break;
         case 0x05:
                     Modbus_Function_5();
                     break;
         case 0x02:
                     Modbus_Function_2();
                     break;
                     case 0x10:
                                             Modbus_Function_16();
                                             break;
         default:
                                    {
                                             Com0_Send_Data_Buffer[1]=0xFF;
                                             Com0_Send_Data_Buffer[2]=2;
                                             Com0_Send_Data_Bytes=5;
                                             Com0_Send_Data_Buffer[3]=0x00;
                                             Com0_Send_Data_Buffer[4]=0x06;
                  }
      }
}
else
{
      ////show error!
      Com0_Send_Data_Buffer[1]=0xFF;
      Com0_Send_Data_Buffer[2]=2;
      Com0_Send_Data_Bytes=5;
      Com0_Send_Data_Buffer[3]=0x00;
      Com0_Send_Data_Buffer[4]=0x07;
}
crcresult= getCRC16(Com0_Send_Data_Buffer,Com0_Send_Data_Bytes);
Com0_Send_Data_Buffer[Com0_Send_Data_Bytes]=crcresult & 0xff;
Com0_Send_Data_Buffer[Com0_Send_Data_Bytes+1]=(crcresult >> 8) & 0xff;
Com0_Send_Data_Bytes=Com0_Send_Data_Bytes+2;
Com0_Send_Data_Pointer=Com0_Send_Data_Buffer;
UDR0=*Com0_Send_Data_Pointer;
}