Quote Originally Posted by Darrel Taylor View Post
Remind me not to fly on one of your planes.

When people get thrown extra duty because they didn't know something and the boss refused to help.
It's likely they won't bother asking questions the next time they have problems.

Who know's what goes un-fixed.

Fine, I'll do it.

xnihilo,
Code:
i VAR BYTE

i = PORTA            ' Clear mismatch condition
INTCON = %00001000   ' enable porta interrupts on change and clear flag

ON INTERRUPT GOTO in_sig    ' int routine
Remove the other INTCON statement.
It looks like I could finaly prevent interrupts occuring without no reason.
I still have to thoroughly test the program.
I would like to know what's the need for GIE.
In your code above, you don't enable GIE at all, I followed your instructions and it worked.
I thought that in order for Interrupts for PORTA change (or any interrupts) to be enabled, GIE bit had to be set. I could not find clear information neither in pbp manual nor in the pic datasheet.

I have more strange things happening though, in my program just after the int routine label if I add an LCD output with the value of variable "a" bits (with a loop of 6 iterations and LCDOUT #a.0(i)) after an "a=porta" to get port pins values and clear mismatch), the value displayed doesn't change no matter what pin triggered the int (even if the right pin is detected), and ever more strange, after the interrupt routine is finished and before going back to the infinite loop, the value of portA bits is displayed once again, with no reason...
Subtleties...

Anyway, thanks a lot for your help, hope it solved the problem. It is still not crystal clear for me how to use stuff related to interrupts, I'm using the instructions more or less empiricaly and I'm not sure about the order in which I write the program sections.

If you have some time to waste, maybe you could have a look at my program and let me know if you see very horrible things
http://users.edpnet.be/charlesetchri...g/se230308.pbp

Best regards