During debug, I often get the softdevice calling app_error_fault_handler

RE: During debug, I often get the softdevice calling app_error_fault_handler

David Fernandez — Tue, 19 Mar 2019 16:03:42 GMT

OK, thanks.

RE: During debug, I often get the softdevice calling app_error_fault_handler

Vidar Berg — Tue, 19 Mar 2019 15:27:57 GMT

Hi,

It's not possible to disable the assert checks inside the Softdevice unfortunately. But you can overcome this limitation by using monitor mode debugging as Awneil suggested. Daniel who is one of our FAEs has written a blog post on how to set it up for GDB/Eclipse: https://devzone.nordicsemi.com/b/blog/posts/monitor-mode-debugging-with-j-link-and-gdbeclipse. You can use it with just GDB as well; the difference is that you run the monitor commands directly in GDB.

Best regards,

Vidar

RE: During debug, I often get the softdevice calling app_error_fault_handler

David Fernandez — Tue, 19 Mar 2019 13:43:06 GMT

Hi Owneil,

Thanks for clarifying.

I'll try to add that to my project.

My most immediate problem is that I am running low on memory until I get the new hardware, o I am wondering if there is a way to tell the softdevice to not assert on that, as the problem I am debugging won't care if the cooms get disrupted due to expired timers that did not run or missing events.

Regards

RE: During debug, I often get the softdevice calling app_error_fault_handler

awneil — Tue, 19 Mar 2019 10:17:46 GMT

It's because the SoftDevice has timing requirements, and stopping the CPU with the debugger breaks them - so the SoftDevice crashes.

You need to use Monitor Mode debugging:

https://devzone.nordicsemi.com/f/nordic-q-a/23657/improved-softdevice-debugging/148486#148486

https://devzone.nordicsemi.com/f/nordic-q-a/38438/a-working-demo-of-monitor-mode-debug-mmd-on-sdk-15-please

https://www.segger.com/products/debug-probes/j-link/technology/monitor-mode-debugging/