sendandreceive.txt

此文件是关于两片单片机通信的c语言代码

#include "reg51.h"
#define uchar unsigned char
#define TR 1
uchar idata buf[10];
uchar sum;
void init (void)
{ TMOD=0x20;
  TH1=0xe8;
  TL1=0xE8;
  PCON=0x00;
  TR1=1;
  SCON=0x50;
}

void send (void)
{ uchar i;
  do{
      SBUF =0xAA;
      while(RI==0);
      RI=0;
     } while ((SBUF^0XBB)!=0);
   do{
      sum=0;
      for(i=0;i<16;i++)
      {SBUF=buf[i];
       sum+=buf[i];
       while (TI=0);
       TI=0;
       }
     SBUF=sum;
     while (TI==0); TI=0;
     while (RI==0); RI=0;
      }while (SBUF!=0);
 }



void receive ()
{ uchar i;
  do{}while (RI	==0); RI=0;
  while((SBUF^0xAA) !=0)
     SBUF= 0xBB;
     while (TI==0);
     TI=0;
     while(1)
     {sum=0;
      for (i=0;i<16;i++)
      {while (RI==0);RI=0;
       buf[i]=SBUF;
       sum+=buf[i];
     }
   while(RI==0);RI=0;
   if ((SBUF^sum)==0)
      {SBUF=0x00;break;}
   else 
     {SBUF=0xFF;
      while (TI==0);
      TI=0;
  }
}



void main(void)

{init();
 if(TR==0)  {send();}
 else{receive();}
}