#include<reg52.h>//篮球计时计分器
#define uint unsigned int
#define uchar unsigned char
sbit k1=P1^0;
sbit k2=P1^1;
sbit k3=P1^2;
sbit k4=P1^3;
uchar code table[]={
0x3f,0x30,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f};uchar shu1,shu2,shu3,num0;
uchar a,b,c,d,e,f;
void init()
{
TMOD=0x01;
TH0=(65536-45872)/256;
TL0=(65536-45872)%256;
EA=1;
ET0=1;
TR0=1;
num0=0;
shu1=59;
shu2=59;
shu3=0;
}
void delay(uint xms)
{
uint i,j;
for(i=xms;i>0;i--)
for(j=110;j>0;j--);
}
void display()
{
a=shu1/10;
b=shu1%10;
c=shu2/10;
d=shu2%10;
//e=shu3/10;
//f=shu3%10;
P2=0xfe;
P0=table[a];
delay(5);
P2=0xfd;
P0=table[b];
delay(5);
P2=0xfb;
P0=table[c];
delay(5);
P2=0xf7;
P0=table[d];
delay(5);
//P2=0xef;
//P0=table[e];
//delay(5);
//P2=0xdf;
//P0=table[f];
//delay(5);
}
void kscan()
{
if(k1==0)
{
delay(2);
if(k1==0)
{
while(!k1);
TR0=~TR0;
}
}
if(k2==0)
{
delay(2);
if(k2==0)
{
while(!k2);
TR0=0;
shu1=0;
shu2=0;
}
}
if(k3==0)
{
delay(2);
if(k3==0)
{
while(!k3);
shu3++;
if(shu3==100)
shu3=0;
}
}
if(k4==0)
{
delay(2);
if(k4==0)
{
while(!k4);
shu3--;
if(shu3==0)
shu3=0;
}
}
}
void main()
{
init();
while(1)
{
kscan();
display();
if(num0==20)
{
num0=0;
shu2--;
if(shu2==-1)
{
shu2=59;
shu1--;
if(shu1==-1)
{
shu1=59;
}
}
}
}
}
void T0_time() interrupt 1
{
TH0=(65536-45872)/256;
TL0=(65536-45872)%256;
num0++;
}
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