reception program for Serial communication using 8051

/*************************** Serial communication *************************/

Reception Program

#include <REGX51.H>

void main()

{

      unsigned char a [50], i=0;

TMOD=0X20;                                    //timer1 mode2

TH1=0XFD;                                       //baud rate 9600

SCON=0X50;                                     //mode 1 and set REN (Receive enable) bit

TR1=1;                                                //start the timer

 while (1)

{

while (RI==0);                        //monitoring RI bit until rise the bit

                                   //transmit characters ‘a’ through SBUF register

a[i]=SBUF;                      //moving Data from SBUF to array

RI=0;                                //clear the RI bit

SBUF=a[i];                      //array assigned to SBUF register

while (TI==0);                  //monitoring TI bit until rise the bit

TI=0;                                //clear the TI bit

}

}