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Altera_Forum's avatar
Altera_Forum
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15 years ago

IRQ not working

Hello i have a DE2-115, i am trying to generate an IRQ from a button press. I've mapped the button in the pin planner, connected to the system template instance generated by QSys and my software h...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

As dsl said, you must write 1 to the irq bits to reset them.

Writing 0 won't reset anything.

You can use

IOWR_ALTERA_AVALON_PIO_EDGE_CAP(INPUT_IRQ_BASE, 0xf);

if you don't mind to reset all bits and not only the one which caused the interrupt to be serviced.