Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Cyclone V GPIO interrupt can not work under low level-trigger mode

Hi all, I'm using Altera Cyclone V board (Board Info http://www.altera.com/products/devkits/altera/kit-cyclone-v-soc.html ). And tried to set User Push Button [0 :3] as low level trigger mode, ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

--- Quote Start ---

That is what I'd expect from a level triggered interrupt.

As soon as the ISR returns and enables interrupts, if the IRQ is still asserted (and not masked) then the ISR will be re-executed.

--- Quote End ---

Thank you for your reply, I agree with your answer, thanks!