Interupt proble

Hi to all

i have found a stange problem when using an interupt.
The circuit is for a small alarm system.
I use the interupt to check if the alarm is on or off with a key switch
or externel remote control.
Then i scan the port that the sensors are connected to.
As you will see in the "loop" section switches portc,2 on and off with a delay of 1 second. This is the problem the portc,2 just gives a blink now and then. If i remove the inertupt portc,2 works fine.


Please help

You should not call lots of functions from an interrupt. I haven't counted but it wouldn't surprise me if you have overflowed the stack. In your interrupt just set a flag that you test in the main loop. If you want lots of delays then add a counter to your interrupt and use that to time the delays.

Mike.