#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit dula=P2^6;
sbit wale=P2^7;
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delayms(uint);
void display(uchar,uchar);
uchar num, num1,shi,ge,beep;
void main()
{
TMOD=0x01;
TH0=(65536-45872)/256;
TL0=(65536-45872)%256;
EA=1;
ET0=1;
TR0=1;
while(1)
{
display(shi,ge);
}}
void display(uchar shi,uchar ge)
{
dula=1;
P1=table[ge];
dula=0;
delayms(5);
wale=1;
P1=table[shi];
wale=0;
delayms(5);
}
void T0_time() interrupt 1
{
TH0=(65536-45872)/256;
TL0=(65536-45872)%256;
num1++;
if(num1==20)
{
num1=0;
num--;
if(num==0)
num=60;
delayms(1);
shi=num/10;
ge=num%10;
}}
void delayms(uint xms)
{
uint i,j;
for(i=xms;i>0;i--)
for(j=110;j>0;j--);
}