#include"reg52.h"
#define uint unsigned int
#define uchar unsigned char
//sbit e=P2^4;
//sbit f=P2^5;
sbit duan=P2^6;
sbit wei=P2^7;
sbit LED1=P0^0; //聲明LED1為P1.0端口
sbit LEDctr=P1^4;
sbit Beep=P2^2;
sbit key1=P3^2;
sbit key2=P3^4;
sbit key3=P3^6;
sbit key4=P3^7;
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delayms(uchar);
uchar numt0,num;
void display(uchar numdis)
{
uchar shi,ge;
shi=numdis/10;
ge=numdis%10;
duan=1;
P0=table[shi];
duan=0;
P0=0xff;
wei=1;
P0=0xfe;
wei=0;
delayms(100);
duan=1;
P0=table[ge];
duan=0;
P0=0xff;
wei=1;
P0=0xfd;
wei=0;
delayms(10);
}
void delayms(uchar xms)
{
uint i,j;
for(i=xms;i>0;i--)
for(j=130;j>0;j--);
}
void init()
{
TMOD=0x01; //定時器工作模式
TH0=(65536-20000)/256; //裝初始值，20ms一次中斷
TL0=(65536-20000)%256;
EA=1; //全局中斷允許位開
ET0=1; //定時器0中斷允許位開
}
void keyscan()
{
Beep=1;
if(key1==0)
{
delayms(1);
if(key1==0)
{
num++;
if(num==60)
num=0;
Beep=0;
while(!key1);
Beep=1;
}
}
if(key2==0)
{
delayms(5);
if(key2==0)
{
if(num==0)
num=60;
num--;
Beep=0;
while(!key2);
Beep=1;
}
}
if(key3==0)
{
delayms(5);
if(key3==0)
{
num=0;
Beep=0;
while(!key3);
Beep=1;
}
}
if(key4==0)
{
delayms(5);
if(key4==0)
{
Beep=0;
while(!key4);
Beep=1;
TR0=~TR0;
}
}
}
void main()
{
init();
while(1)
{
keyscan();
display(num);
}
}
void T0_time()interrupt 1
{
TH0=(65535-20000)/256;
TL0=(65535-20000)%256;
numt0++;
if(numt0==50)
{
numt0=0;
num++;
if(num==60)
num=0;
}
}
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