Int_ex.rar_at89s52 interrupt_ex

#include <reg52.h> #define ON 0 #define OFF 1 sbit LED = P2^0; sbit led2 = P2^2; sbit led3 = P2^1; sbit sw = P3^7; void DelayMs(unsigned int msec); unsigned int counter = 0; unsigned int counter2 = 0; unsigned int swcon = 0; void main(void) { IT0 = 1; IT1 = 1; EX0 = 1; EX1 = 1; EA = 1; led2 = 0; led3 = 0; P0 = 0X00; P2 = 0X00; while(1) { LED = ON; DelayMs(500); LED = OFF; DelayMs(500); P1 ^= 0x01; if(counter == 5) { led2= 1; counter = 0; } if(counter2 == 5) { led3= 1; counter2 = 0; } if(sw==0) { led2 = 0; led3 = 0; } } } void DelayMs(unsigned int msec) { unsigned int x,y; for(x=0; x<=msec;x++) { for(y=0;y<=110;y++); } } void ex0_isr (void) interrupt 1 { counter++; } void ex1_isr (void) interrupt 2 { counter2++; }