NIOSII RST pin

If you just want a software reset then

1. disable all IRQs (if you use any)

2. use

goto *((void**) NIOS2_RESET_ADDR);

to jump to the reset address of the NIOS.

NIOS2_RESET_ADDR is defined at system.h, so don't forget to

# include <system.h>

This will ONLY reset the CPU, NO reset for any of the peripherals !!

Hope this helps,

Klaus

How can I reset my processor from inside the VHDL code without it resetting all peripherals ?

I have a top entity VHDL which has an instance of the Nios II system (which was generated by SOPC builder), connected to various custom VHDL modules. I want the VHDL to supervise processor operation and restart it in case anything goes wrong. How can this be achieved ?

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originally posted by eliben@Sep 6 2006, 06:05 AM

how can i reset my processor from inside the vhdl code without it resetting all peripherals ?

i have a top entity vhdl which has an instance of the nios ii system (which was generated by sopc builder), connected to various custom vhdl modules. i want the vhdl to supervise processor operation and restart it in case anything goes wrong. how can this be achieved ?

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=18094)

--- quote end ---

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I think Nios V6.0 provides a separate CPU reset signal...

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originally posted by stonie+sep 6 2006, 04:35 am--><div class='quotetop'>quote (stonie @ sep 6 2006, 04:35 am)</div>

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<!--quotebegin-eliben@Sep 6 2006, 06:05 AM

how can i reset my processor from inside the vhdl code without it resetting all peripherals ?

i have a top entity vhdl which has an instance of the nios ii system (which was generated by sopc builder), connected to various custom vhdl modules. i want the vhdl to supervise processor operation and restart it in case anything goes wrong. how can this be achieved ?

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=18094)

--- quote end ---

--- Quote End ---

I think Nios V6.0 provides a separate CPU reset signal...

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=18102)</div>

[/b]

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Thanks. Is there a way, however, to do it in Nios 5 ? It doesn&#39;t have to be an "officially supported way".

Hi Eliben,

We have applications that sometimes need to restart the CPU. Stonie&#39;s method of killing the IRQs and jumping to the reset address works ok for us on version 5.0

but I would like to add a little to what he says. As well as disabling the global IRQ it is best to disable all the individual IRQs on the peripherals too. I think Stonie meant this but didn&#39;t make it quite clear. This ensures that when the system wakes up again there are no &#39;pending&#39; interrupts that get serviced before you&#39;re ready for them, or have even installed them.

Banx.