久久久久久久999_99精品久久精品一区二区爱城_成人欧美一区二区三区在线播放_国产精品日本一区二区不卡视频_国产午夜视频_欧美精品在线观看免费

^{<samp id="0kkmq"></samp>}

標題: ST89C52中斷方式實現簡易三位秒表 [打印本頁]

作者: kkkkkkkk111 時間: 2021-1-21 20:51
標題: ST89C52中斷方式實現簡易三位秒表
#include<reg52.h>
#define uchar unsigned char
sbit duan=P2^6;
sbit wei=P2^7 ;
int index=0;
uchar ms;
uchar s;
uchar code duanS[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
uchar code weiS[]={0xef,0xdf,0xbf};

void initP1(){
EA=1;
ET0=1;
TR0=1;
TMOD|=0x01;
TH0=(65535-19453)/255;
TL0=(65535-19453)%255;
}
void initP3(){
EA=1;
ET1=1;
TR1=1;
TMOD|=0x10;
TH1=60927/255;
TL1=60927%255;
}

void display(uchar i){
P0=weiS[index];
switch(index) {
   case 0: wei=1;duan=0;wei=0;duan=1;P0=duanS[i/100];
   break;
   case 1: wei=1;duan=0;wei=0;duan=1;P0=duanS[i/10%10];
   break;
   case 2: wei=1;duan=0;wei=0;duan=1;P0=duanS[i%10];
   break;
}
index++;
if(index>=3)
index=0；
}

void main(){
   initP1();
   initP3();
   while(1);
}

void interP1() interrupt 1 {
   TH0=(65535-19453)/255;
   TL0=(65535-19453)%255;
   ms++;
   if(ms==60){
   P1=~P1 ;
   s++;
   ms=0;
   }
   if(s>=100)
   s=0;
}

void interP3() interrupt 3{
TH1=60927/255;
TL1=60927%255;
display(s);
}

歡迎光臨 (http://www.zg4o1577.cn/bbs/)