单片机秒表程序

ID:422259 · 发表于 2018-11-7 12:06

单片机源程序如下:

#include"reg52.h"
sbitkey=P3^7;
unsignedchar led_mod[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//字模
unsignedint count=0,num1=0,num2=0;
unsignedchar work=0,block=0,record=0,situation=1;
voidT0_srv (void) interrupt 1 //定时器0，定时1秒，刷新秒表显示
{
TH0 =(65536-50000)/256;
TL0 =(65536-50000)%256;
count++;
if(count==20)
{count=0;
if(num1==9&&num2==9) num1=num2=0;
else{
if(num1==9) num2++,num1=0;
else num1++;
}}
}
voidT1_srv (void) interrupt 3 //定时器1，定时200ms，用来判断短按和长按
{
TH1 =(65536-20000)/256;
TL1 =(65536-20000)%256;
record++;
if(record==10)
{ record=0;
if(key==0) situation=0;
elsesituation=1,work=!work;
block=1;
}
}
voiddelay()
{
unsigned int i=2000;
while(i--);
}
voidcheck()//按键检索函数
{
if(key==0){ //判断按键长短
delay();
if(key==0) {TR0=0,TR1=1;
while(!block);
TR1=0;TH1=(65536-50000)/256;TL1=(65536-50000)%256;block=0;//开启定时器1，计时200ms,以此判断长按和短按
if(situation==0){while(!key);work=0;TR0=0,TH0=(65536-50000)/256;TL0=(65536-50000)%256;num1=num2=0;}//长按清零
else{ //短按开始或者暂停秒表
if(work==0) TR0=0;
else TR0=1;}}}
}
voidmain(){
TMOD=0x11; //定时器工作组1
TH0=(65536-50000)/256; //定时器初值设定
TL0=(65536-50000)%256;
TH1=(65536-50000)/256;
TL1 =(65536-50000)%256;
EA=1;
ET0=1;
ET1=1;
TR0=0;
TR1=0;
P0=led_mod[num1];
P2=led_mod[num2];
while(1)
{
check();//按键检索
P0=led_mod[num1];delay();//死循环显示秒表计数
P2=led_mod[num2];delay();
}}

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