16f84a running interrupt PICBASIC code

[divaker]

Am preparing a soft copy of the schematic and also a writeup of what is what in the program?

Meanwhile I found that the chip actually resets everytime while executing the interrupt routine.
Goes to beginning of code and starts executing again.

WDT is OFF and I am not sure why this happening.
Could there be some other reason?

But the code works alright in the MPLAB SIM!!

Divaker

[skimask]

Who cares if it works in the MPLAB SIM or any other SIM.
If a plane test flies well in the simulator, but crashes every time they try to test fly it in real life, which method of testing are you going to believe?

Open up your datasheets, or do a Google search whatever for STACK UNDERFLOW or STACK OVERFLOW.
You explained your problem in your last post, and it almost completely verified what I told you 2 or 3 posts ago.

Meanwhile I found that the chip actually resets everytime while executing the interrupt routine.
Goes to beginning of code and starts executing again.
WDT is OFF and I am not sure why this happening.

Again, how can you RETURN from somewhere you didn't GOSUB to?
Same thing applies with an INTERRUPT. You can't RETFIE (RESUME) without an interrupt. Break out the datasheets and look up RETFIE, then break out your PBP manual and look up RESUME. An INTERRUPT is basically nothing more than a hardware generated CALL (not a GOTO because a CALL remembers where it came from). If you GOTO into your interrupt routine and expect it to come back where it came from, it's probably going to 'come back' to $0000, the RESET vector, whatever you want to call it. But actually, it's not going to do any of that, because you're going to have a STACK UNDERFLOW. You can't pull less than what's not there.
I'm guessing you probably haven't tried rewriting your code yet?
If you would've, you might avoid this problem altogether...

[divaker]

Dear Skimask and Joe,

Thanks guys for your kind suggestions for correcting the prob.
The whole prob was due to the relay that I had connected to the output.
It was the a typical case of not remembering to add a simple flyback diode. The relay was responsible for the prob.
As soon as I corrected it, everything worked like plum.
Thanks once 'gain.

Divaker

[skimask]

Didn't say anything about connecting a RELAY (yes, your code says solenoid, but you don't mention that it's actually hooked up)...
Could've saved 15 posts over a few days...