program for timer interrupt using 8051

/**************** Interrupt program **************************/

/***********Timer interrupt ************************************/

#include<reg51.h>

sbit b = P1^0;

void Timer0(void) interrupt 1

{

     b = ~b;                              //toggling a bit of P1^0 when interrupt occurs

}

void main()

{

       TMOD=0x02;                   //TIMER1 MODE2

       TH0=0x25;

       TR0=1;

       IE=0x82;                          // interrupt initialization for timer 0

       while (1)

       {

                  P0=~P0;                 //toggling port 0

        }