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是645—1997通讯协议！

void UartIRInit(void)
{ 
 /*----set INTP3-----------------------------------------------------------*/
 PIF3 = 0;
 PM3.1 = 1;
 EGP = 0x00; //EGP3=0
 EGN = 0x08; //EPN3=1
 PMK3 = 0;  //enable interrupt
 PPR3 = 1;  //low priority
 /*---set TMH1-------------------------------------------------------------*/
 TMHMD1 = 0;
 TMHMD1 = 0x30;//00110000
 CMP01 = 103; //8000000/64/104=1201.92
 TMMKH1 = 0; //enble interrupt
 TMPRH1 = 0; //high priority
 /*---set TMH0-------------------------------------------------------------*/
 TMHMD0 = 0;
 PM3.2 = 0;
 P3.2 = 0;

 CMP00 = 104;//8000000/(104+1) = 76.190K
 
 TMHMD0 = 0x01;//enable output
 TMMKH0 = 1; //disable interrupt
 /*--------byte set--------------------------------------------------------*/ 
 //RXIR=0;
 //TXIR
 UartIR.Monit500ms = 0;
 UartIR.Monit5s = 0;
 UartIR.Lapse30ms = 0;
 FUartIR_RStart = 0;
 FUartIR_REnd = 0;
 FUartIR_Treat = 0;
 FUartIR_Ting = 0;
}

__interrupt void IntP3(void)
{ 
 CMP01 = 51;
 TMHE1 = 1;
 PMK3 = 1;
 IRB = 0;//infrade buf
 IRBits = 0;
 IRParity = 0;
}

__interrupt void IntTMH1(void)
{
 TMHE1 = 0;
 CMP01 = 103;
 TMHE1 = 1;
 if (FUartIR_Ting == 1)
 {
  if (IRBits < 9)  //data bit
  { 
   if ((IRB&0x01) == 0x0)
    TMHE0 = 1;
   else
   { 
    IRParity++;  //even parity
    TMHE0 = 0;
    P3.2 = 0;
   }
   IRB >>= 1;
   IRBits++;
  }
  else if (IRBits == 9)  //parity bit
  {
   if (IRParity.0 == 0)
   {
    TMHE0 = 1;//even 1 bits,even parity is 0
   }
   else
   {
    TMHE0 = 0;
    P3.2 = 0;
   }
   IRBits++;
  }
  else if (IRBits == 10)//stop bit
  {
   TMHE0 = 0;
   P3.2 = 0;
   IRBits++;
  }
  else if (IRBits == 11)
  {
   TMHE1 = 0;//end the transmit
   
#ifndef __IR30MS
   
   if (UartIR.FENum != 0)
   {
    UartIR.FENum--;
    IRB = 0xfe;
    IRBits = 1; //start bit
    IRParity = 0;
    CMP01 = 103;
    TMHE1 = 1;
    TMHE0 = 1;
   }
   else if (UartIR.DataNum < (UartIR.Buf[9]+12))
   {
    IRB = UartIR.Buf[UartIR.DataNum++];
    IRBits = 1;//start bit
    IRParity = 0;
    CMP01 = 103;
    TMHE1 = 1;
    TMHE0 = 1;//start bit
   }
   else
   {
    FUartIR_Ting = 0;
    FUartIR_RStart = 0;
    PIF3 = 0;
    PMK3 = 0;//enable P5 interrupt
    TMHE1 = 0;//stop TMH1
   }
#endif
  }
 }
 
 /*-----receive state------------------------------------------------------*/
 else
 { 
  if (IRBits == 0) //the first judge is 0.416ms
  {
   
   if (P3.1 == 1)//start bit is error
   {
    PMK3 = 0;
    TMHE1 = 0;//end the receive
   }
   else
   {
    IRBits = 1;//++;
   }
  }
  else if (IRBits < 9)//data bits
  {
   IRB >>= 1;
   if (P3.1 == 1)
   { 
    IRB |= 0x80;
    IRParity++;
   }
   IRBits++;
  }
  else if (IRBits == 9) //parity bit
  {
   if (((P3.1==0)&&(IRParity.0==0)) ||
      ((P3.1==1)&&(IRParity.0==1))) //even check right
   {
    IRBits++;
   }
   else
   {
    PMK3 = 0;
    TMHE1 = 0; //stop receive
    IRBits = 0;
   }
  }
  else//end bit
  {
   PMK3 = 0;//enable receive last byte
   TMHE1 = 0;//because priority of TMH1 higher than P5

   if (P3.1 == 1)//stop bit
   {
    UartIR.Monit500ms = 0;
    UartIR.Monit5s = 0;
    
    if (FUartIR_RStart == 0)
    {
     if (IRB == 0x68)
     {
      FUartCom = 1;
      UartIR.Buf[0] = 0x68;
      UartIR.DataNum = 1;
      FUartIR_RStart = 1;
     }
    }
    else
    {
     if (UartIR.DataNum < MAXNUM_UART)
     {
      UartIR.Buf[UartIR.DataNum] = IRB;
      if (UartIR.DataNum == 7)
      {
       if (IRB != 0x68)
        FUartIR_RStart = 0;
      }     
      else if (UartIR.DataNum >= (UartIR.Buf[9]+11))
      {
       if (IRB == 0x16)
       {
        PMK3 = 1;   //end the receive
        FUartIR_REnd = 1;
       }
       FUartIR_RStart = 0;
      }
      UartIR.DataNum++;
     }
     else
      FUartIR_RStart = 0;
    }
   }
  }
 }
}这个是源代码，问题从这里来，有空请帮看看，红外确实没有做过。

我知道我的是电表，需要红外波特率是1200bps。这个是接收波特率，对于单片机。

这程序也没有一点注释，，，怎能这样，，