Error compilation when trying write an interrupt handler

[ElectronPIC]

Hi everyone!

I want to write my own interrupt dispatcher. To start I've just copied the dispatcher generated automatically by CCS:

[PCM programmer]

It means you can't have #int_global and #int_rda (for example) at the
same time. If you use #int_global, ALL interrupt handling must be done
by you in the #int_global routine.

Do a forum search for #int_global to find examples of how to do this.

Also look at the CCS example file ex_glint.c in your compiler examples
folder on your PC.

[Ttelmah]

and (important to understand), the only reason to do this, is if you have a handler that must be handled really quickly. In this case you only save the registers that are used in this handler, and get in an out of this ASAP.
If you call multiple handlers, your global has to save every register used in all the handlers, which then means you end up duplicating the CCS handler and gain nothing.....
Your handler is potentially handling INT_RDA, INT_TBE, and INT_CCP.

If you want one of these handled quickly, leave CCS to handle the rest, and declare just the interrupt you want dealt with quickly as a high priority interrupt. If you declare is as 'FAST', then it'll be called like the INT_GLOBAL, but as a high priority interrupt (you need to have HIGH_INTS=TRUE as well). You will be responsible only for saving the registers it uses, and things will be as fast as possible.

[ElectronPIC]

[ElectronPIC]

[Ttelmah]

Yes.

In fact the one complaint about it, is that if you do something very minor in your interrupts (so no array accesses, but just increment a simple counter for example), it still saves everything, including the index registers.

[PCM programmer]