#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit key1=P3^4;
sbit key2=P3^5;
sbit key3=P3^6;
sbit key4=P3^7;
sbit duan=P2^6;
sbit wei=P2^7;
uchar code table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
void delayms(uint) ;
void display(uchar numdis);
uchar num,numt0,shi,ge;
void main()
{ void init();
while(1)
{ void keyscan();
void display(num);
}
}
void display(uchar numdis)
{
shi=numdis/10;
ge=numdis%10;
duan=1;
P0=table[shi];
duan=0;
P0=0x0;
wei=1;
P0=0x1;
wei=0;
delayms(5);
duan=1;
P0=table[ge];
duan=0;
P0=0x0;
wei=1;
P0=0x2;
wei=0;
delayms(5);
}
void delayms(uint xms)
{uint i,j;
for(i=xms;i>0;i--)
for(j=107;j>0;j--);
}
void Interrupt_T0_time() interrupt 1
{ TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
numt0++;
if(numt0==20)
{numt0=0;
num++;
if(num==60)
num=0;
}
}
void init()
{ TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
}
void keyscan()
{if(key1==0)
{delayms(10);
if(key1==0)
{num++;
if(num==60)
num=0;
while(!key1);
}
}
if(key2==0)
{delayms(10);
if(key2==0)
{if(num==0)
num=60;
num--;
while(!key2) ;
}
}
if(key3==0)
{delayms(10);
if(key3==0)
{ num=0;
while(!key3);
}
}
if(key4==0)
{
delayms(10);
if(key4==0)
{while(!key4);
TR0=~TR0;
}
}
}
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