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#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit wela=P2^7;
sbit dula=P2^6;
void display(uchar bai,uchar shi,uchar ge);
void init();
void delay(uint z);
uchar aa,bai,shi,ge,temp;
uint z;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
void main()
{
init(); //初始化之程序
while(1)
{
if(aa==20)
{ aa=0;
temp++;
if(temp==100)
{temp=0;}
bai=temp/100;
shi=temp%100/10;
ge=temp%10;
display(bai,shi,ge);
}
}
}
void init()
{
wela=0;
dula=0;
temp=0;
TMOD=0x01;
TH0=(63556-50000)/256;
TH0=(63556-50000)%256;
EA=1;
ET0=1;
TR0=1;
}
void timer0() interrupt 1
{
TH0=(63556-50000)/256;
TH0=(63556-50000)%256;
aa++;
}
void delay(uint z)
{ uint x,y;
for(x=z;x>0;x++)
for(y=z;y>0;y++);
}
void display(uchar bai,uchar shi,uchar ge) //顯示1-100變化的子程序
{
dula=1;
P0=table[bai];
dula=0;
P0=0xff; //防止造成數(shù)據(jù)混亂
wela=1;
P0=0xfe;
wela=0;
delay(5);
dula=1;
P0=table[shi];
dula=0;
P0=0xff; //防止造成數(shù)據(jù)混亂
wela=1;
P0=0xfd;
wela=0;
delay(5);
dula=1;
P0=table[ge];
dula=0;
P0=0xff;
wela=1;
P0=0xfb;
wela=0;
delay(5);
}
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