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#include<reg52.h>
#define uchar unsigned char
#define uint unsignede int
sbit dula=P2^6;
sbit wela=P2^7;
char code tabl[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,
0x76,0x79,0x38,0x3f,0};
uchar temp,b,s,g,tab;
void delay(uchar x)
{uchar i,j;
for(i=0;i<x;i++)
for(j=0;j<110;j++);}
void int0()interrupt 0
{TR0=1;
//tab=100;
}
void initil()
{dula=0;
wela=0;
tab=101;
TMOD=0X01;
TH0=(65535-50000)/256;
TL0=(65535-50000)%256;
EA=1;
ET0=1;
EX0=1;
//TR0=1;
}
void display(uchar b,uchar s,uchar g)
{ dula=1;
P0=tabl[b];
dula=0;
P0=0xff;
wela=1;
P0=0xfe;
wela=0;
delay(1);
dula=1;
P0=tabl[s];
dula=0;
P0=0xff;
wela=1;
P0=0xfd;
wela=0;
delay(1);
dula=1;
P0=tabl[g];
dula=0;
P0=0xff;
wela=1;
P0=0xfb;
wela=0;
delay(1);
}
void timer0()interrupt 1
{TH0=(65535-50000)/256;
TL0=(65535-50000)%256;
temp++;
}
void main()
{
initil();
while(1)
{
if (temp==8)
{ temp=0;
tab--;
if (tab==-1)
{
tab=0;
TR0=0;
}
b=tab/100;
s=tab%100/10;
g=tab%10;}
display(b,s,g);
}}
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