#include <reg51.h>
#include <stdio.h>
#define SECOND 4000

unsigned int count;

struct time {
	unsigned char hour;
	unsigned char min;
	unsigned char sec;
} clocktime;

void timer() interrupt 1 using 2
{
 if (++count == SECOND) {
     count=0;
     update(&clocktime);
     if (++clocktime.sec==60) {
        clocktime.sec=0;
	    if (++clocktime.min==60) {
	       clocktime.min=0;
 	       if (++clocktime.hour==25) {
	           clocktime.hour=1;
	           }
           }
	    }
     }
}