#include"reg52.h"
#define uchar unsigned char
#define uint unsigned int
sbit a=P2^2;
sbit b=P2^3;
sbit c=P2^4;
sbit k1=P3^1;
sbit k2=P3^0;
sbit k3=P3^2;
uchar temp,aa,shi,ge,zan;
uchar flag1=0,flag2=0,flag3=0;
uchar num=60;
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,
0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delay(uint t);
void display(uchar shi,uchar ge);
void init();
void key_scan();
void main()
{
init();//初始化子程序
while(1)
{
key_scan();
if(flag1)
{
if(aa==20)
{
shi=temp/10;
ge=temp%10;
aa=0;
temp++;
if(temp==60)
{
temp=0;
}
}
key_scan();
if(flag2||flag3){flag1=0;break;}
}
if(flag2)
{
if(aa==20)
{
shi=num/10;
ge=num%10;
aa=0;
num--;
if(num==0)
{
num=60;
}
}
key_scan();
if(flag1||flag3){flag2=0;break;}
}
display(shi,ge);
}
}
void delay(uint t)
{
uint j,k;
for(j=t;j>0;j--)
for(k=110;k>0;k--);
}
void display(uchar shi,uchar ge)
{
a=1,b=1,c=1;
P0=table[shi];
delay(1);
a=0,b=1,c=1;
P0=table[ge];
delay(1);
}
void init()
{
num=60;
temp=0;
zanting=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++;
zanting=1;
}
void key_scan()//键盘扫描
{
if(!k1)
{
delay(10);
if(!k1)
flag1=1;
}
if(!k2)
{
delay(10);
if(!k2)
flag2=1;
}
if(!k3)
{
delay(10);
if(!k3)
flag3=1;
}
}
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