8051_Code.txt

#include <reg51.h>
   sbit friend=P0^0;
   sbit message=P0^1;
   sbit notification=P0^2;
   sbit facebook_logo_1=P0^3;
   sbit facebook_logo_2=P0^4;
void main(void){ 
   unsigned char mybyte;
   P0=0xFF;  
   TMOD=0x20; //use Timer 1, mode 2
   TH1=0xFA; //4800 baud rate
   SCON=0x50;
   TR1=1; //start timer
   while(1)
   {
	
		while(RI==0);
		mybyte=SBUF;
		if(mybyte=='F')
		{	RI=0;
		    while(RI==0);
		    mybyte=SBUF;
			if(mybyte=='1')
			{
			friend=1;	
			}
			else
			{
			friend=0;
			}
  		}
		else if(mybyte=='M')
		{	RI=0;
		    while(RI==0);
		    mybyte=SBUF;
			if(mybyte=='1')
			{
			message=1;	
			}
			else
			{
			message=0;
			}
  		}
		else if(mybyte=='N')
		{	RI=0;
		    while(RI==0);
		    mybyte=SBUF;
			if(mybyte=='1')
			{
			notification=1;	
			}
			else
			{
			notification=0;
			}
  		}
		else if(mybyte=='Y')
		{	RI=0;
		    while(RI==0);
		    mybyte=SBUF;
			if(mybyte=='1')
			{
			facebook_logo_1=1;	
			}
			else
			{
			facebook_logo_1=0;
			}
  		}
		else if(mybyte=='Z')
		{	RI=0;
		    while(RI==0);
		    mybyte=SBUF;
			if(mybyte=='1')
			{
			facebook_logo_2=1;	
			}
			else
			{
			facebook_logo_2=0;
			}
  		}

		RI=0; 
   }
}