程序源代码
#include<reg52.h>
#define uint unsigned int
uint temp,qian,bai,shi,ge,aa,n;
sbit dula=P0;
sbit wela=P1;
sbit zd=P3^2;
uint code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void display(uint qian,uint bai,uint shi,uint ge);
void delay (uint z);
void init();
void main()
{
EA=1;//开总中断
EX0=1;//开外部中断0
init();//初始化子程序
while(1)
{
display(qian,bai,shi,ge);
}
}
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void display(uint qian,uint bai,uint shi,uint ge)
{
P0=table[qian];
P1=0xf7;
delay(1);
P0=table[bai];
P1=0xfb;
delay(1);
P0=table[shi];
P1=0xfd;
delay(1);
P0=table[ge];
P1=0xfe;
delay(1);
}
void exter0() interrupt 0
{
n++;
while(zd==0);
}
void init()
{
wela=0;
dula=0;
temp=0;
TMOD=0x01;
TCON|=0X04;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
}
timer0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
aa++;
if(aa==20)
{
aa=0;
temp=20*n;
n = 0;
qian=temp/1000;
bai=temp%1000/100;
shi=temp%100/10;
ge=temp%10;
}
}
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