串口.c

串口通信

#include<reg52.h>
#define unchar unsigned char;
unchar temp;
void send_char(unsigned char txt);

void initial()
{
 TMOD=0x20;
 TH1=0xfd;
 TL1=0xfd;
 ET1=1;
 TR1=1;
 TR0=1;
 EA=1;
 SCON=0x50;
 ES=1;
 }

void main()
{initial();
 while(1)
 {
  if(RI)
  {
   temp=SBUF;
   RI=0;
  SBUF=temp;
   while(!TI);
   TI=0;

  }
 }
}