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Altera_Forum's avatar
Altera_Forum
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16 years ago

Code blocked in the ISR routine...

Hi, I want to generate a simple Push Button ISR routine... But my code didn't work... The interrupt occurs but the program still in the ISR routine... Here the declaration of the i...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Hi there,

Is your button input de-bounced? If not it could generate a series of consecutive interrupt requests so that as soon as you leave the ISR it re-enters again. If you run your code, rather than step through it, what happens? I'd guess that it would change the state of your LEDs, but in a somewhat erratic fashion.

If your button inputs are debounced to provide a single clean edge, there should be no problem.

Cheers