Time

[maenabbasi]

I want C code as example of how I can set a timer (ie. 5 minutes, 1hour ..etc) using pic18f452 with clock frequency 8MHz.
for example if the time pass (5 minutes, 1hour) a led connected with PIC will turn on forever till another condition happen make it off.

another question
Time= (4x clock period ) x Prescaler x (256 - TMR0L)
what is the difference between prescaler 8 , 1, 32.. etc ? what these numbers mean ? what are the affect they made
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MKA

[SherpaDoug]

You should really read the datasheet for your PIC. The Timer section of the datasheet will tell you about the prescaler and give you an idea how your program should work.
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