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Altera_Forum
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9 years ago

NIOS II soft reset

Hi i am new to the NIOS II features. I am working on a cyclone V (5CEFA4U19C7) which has a Nios II processor in it. I want to do a soft reset which is, resetting the NIOS without power cycling it. I ...
Altera_Forum's avatar
Altera_Forum
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9 years ago

Refer to chapter 28 - "Interval Timer Core" of the "embedded peripherals ip user guide (https://www.altera.com/literature/ug/ug_embedded_ip.pdf)". This explains, pretty well, this IP and using it as a watchdog.

Critically, it states "to prevent an indefinite resetrequest pulse, you are required to connect the resetrequest signal back to the reset input of the timer." So, yes. You're doing the right thing.

As for a 'soft' reset - this is a soft reset. Simplistically, a reset that doesn't rely on an external hardware event (e.g. power cycle, reset button) is a soft reset. So, providing your Nios restarts when the watchdog goes off, you've proved your soft reset works.

Cheers,

Alex