单片机中断实验2(按下松开后开始)

#include<reg51.h>

#define uchar unsigned char

#define uint unsigned int

uchar Led[] = {0xfa,0xf5,0xaf,0x5f,0xaa,0x55,0x00,0xff};

uchar temp;

uchar k;

void main(){

 uchar i;

 k = 0;

 temp = 0;

 TMOD = 0x01;

//计数模式为1时间为65535，0x10是256

 TH0 = (65535-50000)/256;

 TL0 = (65535-50000)%256;

 EA = 1;//总中断

 EX0 = 1;//外部中断

 while(1){

  if(temp == 1){

    for(i=0;i<8;i++){

     P1 = Led[i];

     while(k<20);//20*50ms

     k=0;

    }

  }

 }

}

void wbdd()interrupt 0{

 while(IE0 == 1);//松开后退出循环

 temp = 1;

 ET0 = 1;//定时器溢出中断

 TR0 = 1;//开始计时

}

void int0() interrupt 1{

 TH0 = (65535-50000)/256;//高8位初始化时间

 TL0 = (65535-50000)%256;//低8位初始化时间

 k++;

}