Hi Everyone,

I'm trying to shrink my interrupt service routine on a 16F87x program that
has multiple interrupt sources.
In the service routine I have a test and a service routine for each of the
three interrupt sources I have operating.
The section in question is the capture interrupt for CCP2.
Currently the capture module is always on, and when I want to use it I
clear the CCP2 interrupt flag and set its enable flag.
In the interrupt service routine I test for both CCP2IE and CCP2IF which
are in different banks, meaning I'd like to simplify things a bit here.
I'm thinking that I should just test for CCP2IF and make darn sure that
flag never gets set unless I am capturing, and who cares about CCP2IE
because it'll always be set.
So I'm proposing that most of the time I keep capture2 module switched
off, and when I want to do a capture I'll disable global interrupts, fire
up the capture2 module, clear CCP2IF in case I get a "Microchip False
Interrupt(TM)" and re-enable global interrupts.
That should save me the extra test and related bank switching in my
interrupt service routine.

Comments?

Thanks,

Bob

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