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Altera_Forum's avatar
Altera_Forum
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13 years ago

UART interrupt never occurs

Hi all, I am trying to use UART with interrupt on a NIOS II/e system but it seems like the interrupt never occurs. Before main(), I declare the pointer and the ISR: alt_fd* fd="...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Is UART actually working?

I mean, can you operate it in polling mode?

RRDY bit in status register should change to 1 whenever rx data is ready. If this doesn't happen, the irq won't trigger either.