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#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit dula=P2^6;
sbit wela=P2^7;
uint numt,num;
uint ge,shi,bai,qian;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delayms(uint xms)
{
int i,j;
for(i=xms;i>0;i--)
for(j=110;j>0;j--);
}
void main()
{
num=9999;
TMOD=0x01;
EA=1;
ET0=1;
TH0=(65536-45872)/256;
TH1=(65536-45872)%256;
TR0=1;
while(1)
{
ge=num%10;
shi=num%1000%100/10;
bai=num%1000/100;
qian=num/1000;
dula=1;
P0=table[qian];
dula=0;
P0=0xff;
wela=1;
P0=0xfb;
wela=0;
delayms(1);
dula=1;
P0=table[bai];
dula=0;
P0=0xff;
wela=1;
P0=0xf7;
wela=0;
delayms(1);
dula=1;
P0=table[shi];
dula=0;
P0=0xff;
wela=1;
P0=0xef;
wela=0;
delayms(1);
dula=1;
P0=table[ge];
dula=0;
P0=0xff;
wela=1;
P0=0xdf;
wela=0;
delayms(1);
}
}
void T0time() interrupt 1
{
TH0=(65536-45872)/256;
TH1=(65536-45872)%256;
numt++;
if(numt==20)
{
numt=0;
num- -;
if(num==0)
num=9999;
}
}
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