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Altera_Forum's avatar
Altera_Forum
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11 years ago

NiosII interuppts mamagement

Hello guys... I have a NiosII based system which has to communicate with a master peripheral with the UART protocol. So I've configured it using software interrupt. On my board I have also...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

If interrupt_2 has a lower priority and can't be serviced immediately, anyhow it gets latched by the irq controller and the isr will start when no other higher priority irq is active.

You could lose rx data only if the delay caused by other isr exceeds the time between two rx events. However if your uart has a rx FIFO, you can allow a much longer delay.