send.c

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#include<reg51.h>
#include<stdio.h>
#define uchar unsigned char
#define TR 0



void init(void)
{TMOD=0x20;               //mode 1,counter 1
 TH1=0xFD;                //set baud rate
 TL1=0xFD;
 PCON=0x00;
 TR1=1;                   //start T/C1
 SCON=0x50;               //mode1
}

void send(void)
{
 while(1)
 {
   
   SBUF=0x0a;
   while(TI==0);
   TI=0;
}         //send the data
       
}

void main(void){
 init();
 while(1)
  send();


}