[嵌入式]【蓝桥杯单片机笔记】6-中断系统

练习：
按下S5，产生中断，LED点亮，
再次按下S5，LED左移一位

#include"reg52.h"

void SelectHC573(unsigned char n){
	switch(n){
		case 4:
			P2 = (P2 & 0x1f) | 0x80;
			break;
		case 5:
			P2 = (P2 & 0x1f) | 0xa0;
			break;
		case 6:
			P2 = (P2 & 0x1f) | 0xc0;
			break;
		case 7:
			P2 = (P2 & 0x1f) | 0xe0;
			break;
	}
}

void Init_Int0(){
	EX0=1;
	IT0=1;
	EA=1;	
}

unsigned char Staic_K=0;

void SeverInt0() interrupt 0
{
	
	Staic_K=1;

}
void Delay(unsigned int t){
	while(t--);
	while(t--);
}
unsigned int i;
void ledrun(){
	SelectHC573(4);
	P0=0xff;
	if(Staic_K==1)
	{
		for(i=0;i<=8;i++)
		{
		
		P0 = 0xff<<i;
		Delay(60000);

		}
	}
	Staic_K=0;
}

void InitSystem(){
	SelectHC573(5);
	P0=0x00;
	SelectHC573(4);
	P0=0xff;
}

int main(){
	InitSystem(); 
	Init_Int0();
	while(1){
		
	ledrun();
		
	}
}