C program to transmit a sing le character using uart for 8051.

//program to transmit a sing le character.

#include<reg51.h>

void init_uart(void);

void uart_tr(char);

char uart_rx(void);

void init_uart()

{

 SCON=0x50;//standard uart mode

 TMOD=0x20;//timer1 mode2

 TH1=253;//set the baud rate 9600

 TR1=1;

}

void uart_tr(char c)

{

 SBUF=c;

 while(TI==0);

 TI=0;

}

char uart_rx()

{

 while(!RI);

 RI=0;

 return SBUF;

}

void main()

{

 init_uart();

 uart_tr('A');

 while(1);

}