#include<reg52.h>
unsigned char code a[]={0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8,0x80, 0x90};
unsigned char abuff[]={0xFF,0xFF,0XFF,0XFF,0XFF,0XFF};
unsigned char sec=0; //记录秒数
unsigned char i=0; //动态扫描索引
unsigned char count=0; //记录中断次数 TF0=1为一次中断
void main()
{
EA=1; //开启中断
ET0=1; //开启定时器0中断
TR0=1; //开启定时器0
TMOD=0x01;
TH0=0xFC;
TL0=0x65;
while(1)
{
if(count>=1000) // 中断1000次，即达到1s
{
count=0;
sec++; //秒数加1
abuff[0]=a[sec%10];
abuff[1]=a[sec/10%10];
abuff[2]=a[sec/100%10];
abuff[3]=a[sec/1000%10];
abuff[4]=a[sec/10000%10];
abuff[5]=a[sec/100000%10];
}
switch(i)
{
case 0: P2=0x01;i++;P1=abuff[0];break;
case 1: P2=0x02;i++;P1=abuff[1];break;
case 2: P2=0x40;i++;P1=abuff[1];break;
case 3: P2=0x80;i++;P1=abuff[1];break;
case 4: P2=0x10;i++;P1=abuff[1];break;
case 5: P2=0x20;i=0;P1=abuff[1];break;
default:break;
}
}
}
void InterruptT0() interrupt 1 //interrupt为关键字，1表示定时器0中断
{
TH0=0xFC;
TL0=0x65;
count++;
P1=0xFF; //显示消隐
}
|
