#include<reg52.h>
unsigned char temp,shi,ge,aa;
sbit dula=P2^6;
sbit wela=P2^7;
unsigned char code table[]={0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
void delay(unsigned int z);
void display(unsigned char shi,unsigned char ge);
void init();
void main()
{
init();//初始化子程序
while(1)
{
if(aa==20)
{
aa=0;
if(temp==99)
{
temp=0;
};
shi=temp/10;
ge=temp%10;
temp++;
display(shi,ge);
};
}
}
void delay(unsigned int z)
{
unsigned int x,y;
for(x=z;x>0;x--)
{
for(y=50;y>0;y--)
{
};
};
}
void display(unsigned char shi,unsigned char ge)
{
dula=1;
P0=table[shi];
dula=0;
wela=1;
P0=0xfe;
wela=0;
delay(5);
//送完十位送个位
dula=1;
P0=table[ge];
dula=0;
wela=1;
P0=0xfd;
wela=0;
delay(5);
}
void init()
{
temp=0;
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
}
void
timer0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
aa++;
}
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