nRF52840 - How to debug Zephyr code when the radio is running. HardFault

RE: nRF52840 - How to debug Zephyr code when the radio is running. HardFault

naps — Tue, 15 Dec 2020 09:13:22 GMT

I will dig into this topic and will try to provide some universal open-source solution and post it here in this thread.
Thanks for your help.

RE: nRF52840 - How to debug Zephyr code when the radio is running. HardFault

Jørgen Holmefjord — Mon, 14 Dec 2020 16:40:30 GMT

I have only tested MMD with nRF5 SDK, and the instructions in the GitHub tutorial I linked, not together with NCS or Zigbee, but I did only run it on a standard nRF52 DK. No modifications were made to the DK or J-Link FW.

If you have the required files and commands in place, I believe you should be able to run it with the DK as well.

You may get some better answers regarding exactly why it does not work in the Segger Forums.

RE: nRF52840 - How to debug Zephyr code when the radio is running. HardFault

naps — Mon, 14 Dec 2020 16:19:39 GMT

Hi, thanks for your fast reply.
We are using nRF Connect SDK for the Zigbee application and building it with west + makefiles.
According to www.segger.com/.../

Do all J-Links support Monitor Mode Debugging?

A: No, Monitor Mode Debugging is only supported by J-Link PLUS, PRO, ULTRA+, and J-Trace. J-Link BASE and on-board J-Links cannot be used for Monitor Mode Debugging

I'm wondering if it is really possible.

I'm using opensource toolchains and IDE, and I was able to run MMD by compiling some parts of the sample project from Segger. Next, I've added some gdb commands for init

mon reset 0
mon exec SetMonModeDebug=1
mon exec SetMonModeVTableAddr=0x1f000

And It just works, but only using our external JTrace probe.
You mention some additional licenses; is it possible to upgrade onboard nrf52 devkit JLlink? Or should it work out of the box in your opinion, if our second (JTrace) configuration is working?

RE: nRF52840 - How to debug Zephyr code when the radio is running. HardFault

Jørgen Holmefjord — Fri, 11 Dec 2020 14:48:58 GMT

Hi,

Are you using Zephyr directly, or nRF Connect SDK? Which protocol are you using (Zigbee/Thread/BLE)?

Monitor Mode Debugging can be run on our nRF52 DKs in evaluation mode, see this tutorial. For commercial use, you will have to get a license from Segger.

Best regards,
Jørgen