digital clock using 18F4550

[akhter900]

hie....

I tried to count the second but its not working.
I just take a look on some examples that is given in the CCS compiler but my program does not count the second properly. It becomes slow.

Any body can give me some tips about this?

==========================
#define INTS_PER_SECOND 76
.......
#int_rtcc
void clock_isr() {

if(--int_count==0)
{
++seconds;
int_count=INTS_PER_SECOND;

TIME[S_]++;
if(TIME[S_] >= 60)
{
TIME[S_]=0;
TIME[M_]++;
}
if(TIME[M_] >= 60)
{
TIME[M_]=0;
TIME[H_]++;
}
if(TIME[H_] >= 12)
{
TIME[H_]=0;
}
}
}

void main()
{
..........
int_count=INTS_PER_SECOND;
set_timer0(0);
setup_counters( RTCC_INTERNAL, RTCC_DIV_256 | RTCC_8_BIT);
enable_interrupts(INT_RTCC);
enable_interrupts(GLOBAL);
......
}
==========================

Added after 1 hours 7 minutes:

How can I count the value for....
INTS_PER_SECOND
???

 

[akhter900]

I use the line.... and its working well...

#define INTS_PER_SECOND 183

thanks

 

[codewiz]

Hi. what crystal oscillator are you using because from your code, for 183 to be accurate for 1second generation,(999424uS), you must use 48MHz oscillation. I like the coding.