problem concerning timer

[balboa]

hey there :
I'm using PIC16F877A.
I've read a lot about dealing with timer but I didn't get how am I supposed to code the ISR to make the PIC count one second.
My problem is with the prescaler thing and its calculations.
help please

[asmboy]

the prescaler on timer 0,1,3 counts Fosc/4,
further divided by the prescaler divisor.
the timer in question sets it's interrupt flag on overflow -
and that is what calls your ISR.


What is your take away from reading the manual on the topic
setup_timer_x()

???

[PCM programmer]

This CCS example file use Timer0 (also called rtcc) to count seconds:

[balboa]