setup_timer_0 function arguments

[mcad]

Hello,
we are using "RTCC_EXT_L_TO_H" in the setup_timer_0 function arguments
But, what does this perform ?
anyone knows, please inform me.

[rnielsen]

RTCC_INTERNAL means you are going to use the internal clock as your timing source and use it as a timer.

RTCC_EXT_L_TO_H mean you are going to use an EXTernal source (an input on the pin, T0CKI, that is assigned to this counter) and it will increment on the Low to High transition.

RTCC_EXT_H_TO_L means the same thing but will increment on the High to Low transition of the input.

Look at the data sheet for your PIC and look at the Timer0 section. There's a block diagram that shows how the hardware is arranged and might make more sense.

Ronald