Complete stall: root causes and diagnosis

Sebastian Huber sebastian.huber at
Fri Mar 29 11:00:36 UTC 2019

On 27/03/2019 03:02, Tim Gaggstatter wrote:
> B) Is there a way we can somehow get out of this situation to diagnose 
> it, ideally getting the stacktrace of the halted threads? Is there 
> some kind of non-maskable interrupt I can send  to make a postmortem 
> diagnosis w/o needing to reboot?

I would first try to figure out in which state the targets are. It is 
important to install handlers for all unexpected exceptions and make 
sure that they you use a defined stack pointer to handle the exceptions. 
In the handler I would place the target state in a non-volatile memory, 
reset the target and then send the information to someone.

Sebastian Huber, embedded brains GmbH

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