HELP !! pic16f84A timer0 don't work

[jruibarroso]

any one could see where is the error please
TIMER0 don't work , doesn't count and PULSE_LED don't pulse

#include <16F84A.h>

#FUSES NOWDT //No Watch Dog Timer
#FUSES HS //High speed Osc (> 4mhz)
#FUSES NOPUT //No Power Up Timer
#FUSES NOPROTECT //Code not protected from reading

#use delay(clock=8388608)

#define INTS_PER_SECOND 16 // (8.388.608/4*256*256)) one second each overflow
#define PULSE_LED PIN_B4
#define RELE1 PIN_A1
#define RELE2 PIN_A0
#define RELE3 PIN_B6

#define ON PIN_A2


int int_count;
int sec,min,hrs;

#int_RTCC

void RTCC_isr()
{

output_low(PULSE_LED);

if(--int_count==0)
{
output_high(PULSE_LED);

++sec;
if (sec>59){++min;sec=0;}
if (min>59){++hrs;min=0;}
if (hrs>23){hrs=0;}
int_count=INTS_PER_SECOND;
}
}





void main()
{
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
enable_interrupts(INT_RTCC);
enable_interrupts(GLOBAL);




while(true){

my code ~~~~~~~~
~~~~~~~~
~~~~~~~~

}

}

THANK YOU ALL

[PCM programmer]

[PICdawg]

Keep in mind the following...

Timer0 is an 8 bit timer/counter. Your code says use the internal clock with no prescaler. That means the RTCC is incrementing every 0.4768us. (this time comes from 1/(8388608/4)) That means your rollover occurs every 122us, not every 1/16th of a sec like your code expects. (rollover occurs every 0.4768us * 256 counts per rollover = 122us)

Therefore, with your prescaler set to one, you need to preset a counter to 8192 and begin decrementing from there. (8192 rollovers * 122us per rollover = 1sec)

Make sense?

[PICdawg]

If you go ahead and use the prescaler set to 256, then your counter needs to be initialized to 32. (8192/256=32). As PCM programmer indicated, you are missing this initialization line...