int0.c

单片及c语言轻松入门的随书光盘

#include "reg51.h"
sbit  P1_0=P1^0;
void main()
{	IT0=0;	//设置为下降沿触发
	EA=1;	//开总中断
	EX0=1;	//开外部中断
	for(;;)
	{;}
}
void Int0() interrupt 0
{	P1_0=~P1_0; //取反P1.0		
}