#include <REGX51.H>
#define u8 unsigned char
#define u16 unsigned int
u16 const table [10] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
u16 x;
u16 hour=0,m=0,s=0;
u16 n=0;
void delay_ms(u16 x)
{
u16 i,j;
for(;x>0;x--)
for(i=2;i>0;i--)
for(j=250;j>0;j--);
}
void display(u16 x,y)
{
P2=0xff;
P0=table[x/10];
P2=0xfe;
delay_ms(1);
P2=0xff;
P0=table[x];
P2=0xfd;
delay_ms(1);
P2=0xff;
P0=table[y/10];
P2=0xfb;
delay_ms(1);
P2=0xff;
P0=table[y];
P2=0xf7;
delay_ms(1);
}
void main()
{
TMOD=0x01;
TH0=(65536-50000)/256; //50ms
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
while(1)
{
display (hour,m);
}
}
void timer_0 () interrupt 1
{
TH0=(65536-46083) / 256;
TL0=(65536-46083) % 256;
n++;
if(n == 20)
{
s++;
n=0;
}
if(s>59)
{
m++;
s = 0;
if(m>59)
{
hour++;
m = 0;
if(hour>23)
{
hour = 0;
}
}
}
}
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