基于51單片機(jī)的60秒倒計(jì)時(shí)程序及計(jì)數(shù)器

ID:912735 · 發(fā)表于 2021-5-17 10:45

#include <reg52.h>
unsigned code TAB[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
unsigned char num=60,shi,ge;
void INIT ()
{
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
}
void main()
{
INIT();
while(1)
{
shi=num/10;
ge=num%10;
P0=TAB[shi];
P2=TAB[ge];
}
}
void Timer0() interrupt 1
{
unsigned char i;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
i++;
if(i==20)
{
i=0;
num--;
if(num==0)
num=60;
}
}