PIC18f4520 Timer Interrupt

[amardeep]

 

HI ..

I am using PIC18f4520 Microcontroller and want to genrate clock of 10ms.
Please guide me how to Calculate timer value for 10ms using timer0 Inerrupt of PIC18F4520

[faizal]

if you’re looking for guide, this guide is already good enough:

http://www.engineersgarage.com/embedded/pic-microcontroller-projects/timer-circuit

[AJISH ALFRED]

The basic idea is that the timer is a nothing but a counter which will generate an interrupt when it overflows, and the which increments its count each time a pulse received at the timer module. That pulse is derived from your main clock source, ie a the frequency of the clock will be a fraction of the main clock frequency, usually mainclock/4. 

You know the main clock frequency, divide it by four, find the number of clocks/counts required. Subtrsct that number from the maximum count possible, and set that count value as base count

[Author]

Posts