/* TabLee */
#include<reg52.h>
#define uchar unsigned char;
#define uint unsigned int;
uchar position;
uchar tt;
uchar second;
uchar minute;
uchar hour;
uchar code table[]={0xc0,0xf9,0xa4,0x99,0x92,0x82,0xf8,0x80,0x90};
sbit smg_q=P1^0;
sbit smg_b=P1^1;
sbit smg_s=P1^2;
sbit smg_g=P1^3;
sbit key1=P3^7;
sbit key2=P3^6;
sbit key3=P3^5;
sbit key4=P3^4;
void keyscan();
void display(unsigned char hour,unsigned char minute);
void delay(unsigned int timer);
void init();
void main()
{
init();
while(1)
{
if(tt==20)
{
tt=0;
second++;
if(second==60)
{
second=0;
minute++;
if(minute==60)
{
minute=0;
hour++;
if(hour==24)
hour=0;
}
}
}
display(hour,minute);
delay(1);
}
}
void keyscan()
{
if(key1==0)
{
TR0=0;
hour++;
if(hour==24)
hour=0;
delay(200);
TR0=1;
}
if(key2==0)
{
TR0=0;
hour--;
if(hour<0)
hour=23;
delay(200);
TR0=1;
}
if(key3==0)
{
TR0=0;
minute++;
if(minute==60)
minute=0;
delay(200);
TR0=1;
}
if(key4==0)
{
TR0=0;
minute--;
if(minute<0)
minute=59;
delay(200);
TR0=1;
}
}
void init()
{
tt=0;
position=0;
second=0;
minute=0;
hour=0;
smg_q=1;
smg_b=1;
smg_s=1;
smg_g=1;
key1=1;
key2=1;
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
}
void t0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
tt++;
}
void display(unsigned char hour,unsigned char minute)
{
P0=0xFF;
switch(position)
{
case 0:
smg_g=1;
smg_q=0;
P0=table[hour/10];
break;
case 1:
smg_q=1;
smg_b=0;
P0=table[hour%10];
if(tt>=10)
P0&=0x7f;
break;
case 2:
smg_b=1;
smg_s=0;
P0=table[minute/10];
break;
case 3:
smg_s=1;
smg_g=0;
P0=table[minute%10];
break;
}
position++;
if(position>3)
position=0;
}
void delay(unsigned int time)
{
unsigned int x,y;
for(x=time;x>0;x++)
for(y=110;y>0;y--);
}
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