#include
#define uint unsigned int
#define uchar unsigned char
uchar code table[]={ //Digital tube encoding without decimal point
0xc0,0xf9,0xa4,0xb0,
0x99,0x92,0x82,0xf8,
0x80,0x90};
uchar code table1[]={ //digital tube code with decimal point
0x40,0x79,0x24,0x30,
0x19,0x12,0x02,0x78,
0x00,0x10};
uchar shi=12,second,minute;
uint num,num1,num2,num3;
sbit k1=P1^4;
sbit k2=P1^5;
void display();
void keyscan();
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void init()
{
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%6;
EA=1;
ET0=1;
TR0=1;
}
void main()
{
init();
while(1)
{
keyscan();
display();
}
}
void timer0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%6;
num++;
if(num==20)
{
num=0;
second++;
if(second==60)
{
second=0;
minute++;
}
if(minute>=60)
{
minute=0;
shi++;
}
if(shi>=24)
shi=0;
}
}
void display()
{
P2=0xdf;
P0=table[second];
delay(2);
P2=0xff;
P2=0xef;
P0=table[second/10];
delay(2);
P2=0xff;
P2=0xf7;
P0=table1[minute];
delay(2);
P2=0xff;
P2=0xfb;
P0=table[minute/10];
delay(2);
P2=0xff;
P2=0xfd;
P0=table1[shi];
delay(2);
P2=0xff;
P2=0xfe;
P0=table[shi/10];
delay(2);
P2=0xff;
}
void keyscan()
{
if(k1==0)
{
delay(10);
if(k1==0)
{
shi++;
while(!k1);
}
}
if(k2==0)
{
delay(10);
if(k2==0)
{
minute++;
while(!k2);
}
}
}
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