J-Link Debugger Hang Issue

RE: J-Link Debugger Hang Issue

brushlow — Wed, 09 Aug 2023 20:14:55 GMT

I believe I've figured out the issue, though I'm not sure how it arose to begin with. I noticed in Ozone that the Target Interface Speed was set to 4MHz, where everything worked perfectly. nRF Debug was setting the speed to 12MHz by default. In my launch.json file, I added a serverArgs parameter to my debug config using the external J-Link and changed the speed from 12000 to 4000. Everything seems to work now.

RE: J-Link Debugger Hang Issue

JONATHAN LL — Fri, 04 Aug 2023 09:11:10 GMT

Will keep you updated when I have any news.

RE: J-Link Debugger Hang Issue

brushlow — Wed, 02 Aug 2023 15:39:24 GMT

Understood, I know it's a strange issue.

I guess to summarize based on what I've seen and what you've had me try, it seems like there is an issue with the interaction between specifically the J-Link Base probe and GDB within the nRF Connect environment (given that Ozone works well).

Can the devs suggest anything in particular to uninstall and reinstall that might be the problem area? I have tried to uninstall and reinstall the J-Link package.

RE: J-Link Debugger Hang Issue

JONATHAN LL — Tue, 01 Aug 2023 11:17:32 GMT

Thanks for the clarification. I think we are on the same page then. I have been checking with the developers on this but currently still many is on vacation, so it will be looked at but can promise any traction on the matter. Might be hard to preproduce as well.
Feel free to update if you find some other solution or if the issue is suddenly fixed. Will also keep you updated if i find anything else useful to ask about or if there is something else the developers would like to know.

Regards,
Jonathan

RE: J-Link Debugger Hang Issue

brushlow — Mon, 31 Jul 2023 15:19:29 GMT

Sorry for the ambiguity, I only have one external J-Link Base probe. The only other devices I have to work from are two nRF5340 DKs; debugging on these DKs works fine. Unfortunately, I don't have the immediate option to test with other external J-Link probes unless I can pretty well prove this one is defunct (which seems less likely at this point).

There have been a few minor updates to macOS since I last remember everything working (probably late May to early June). I couldn't say whether or not an update coincided with my debugger issues.

RE: J-Link Debugger Hang Issue

JONATHAN LL — Mon, 31 Jul 2023 15:06:20 GMT

[quote user="brushlow"] I can't find any issues with its operation on my suspect J-Link and target.[/quote]

Since Ozone works as expected then I think it is ok to assume that the debugger HW is not the issue, but you do say "my suspected J-Link", does that mean that you have multiple other J-Link's that do not portray this issue?

- But if you have the option to test a few different debuggers then that would good just to confirm 100% that it is not isolated to one J-Link device.

Has there been any updates to the OS from when there where no issues to when the issues started?

Regards,
Jonathan

RE: J-Link Debugger Hang Issue

brushlow — Mon, 31 Jul 2023 14:58:44 GMT

Apologies, I just saw your question regarding my experience on other DKs. I am only experiencing it on my sole J-Link Base probe. I do not experience the same issue on my nRF5340 DK.

I was suspicious of my J-Link base probe, but per the alternative debugger test you suggested, that probe seems to work fine with Ozone.

RE: J-Link Debugger Hang Issue

brushlow — Mon, 31 Jul 2023 14:03:26 GMT

Hi Jonathan,

SEGGER Ozone seems to work well, as I can't find any issues with its operation on my suspect J-Link and target. I exited that session and immediately tried the default debug option with the same J-Link probe and target. It hits the main breakpoint this time, but now I get a lot of unexpected breakpoints of low-level init functions (e.g. ARM_MPU_SetRegionEx). Eventually it hit a SIGTRAP error and I had to restart; after restarting, the functionality described in my original post returned (i.e. wouldn't hit main() breakpoint). All that to say, the default debug option (without Ozone) still seems to not be fully operational for me, while Ozone works well.

I do have the J-Link probe firmware upgraded to the latest version.

Thanks

RE: J-Link Debugger Hang Issue

JONATHAN LL — Mon, 31 Jul 2023 08:47:36 GMT

Hi,

Some things that you can test:

- Try to use debug with SEGGER Ozone to see if the issue happens there too.
- It could also be JLink version, maybe try to upgrade or downgrade JLink.

Regards,
Jonathan

RE: J-Link Debugger Hang Issue

JONATHAN LL — Fri, 28 Jul 2023 18:53:22 GMT

Hi,

Developers has be updated and I am waiting for feedback that can be provided to you.

Do you have the same experience on multiple development kits?

And informing you that I will be taking over the case for now as Sigurd is on vacation.

Regards,
Jonathan

RE: J-Link Debugger Hang Issue

brushlow — Tue, 25 Jul 2023 20:57:16 GMT

I have tried that a number of times, but it ends up in the same locked up state or exits debugging entirely.

RE: J-Link Debugger Hang Issue

Sigurd Hellesvik — Fri, 21 Jul 2023 14:16:17 GMT

I asked our developers about this, and this is not a known issue at least.

They add a bit about a similar experience also. Can you try this and see if you see the same?

"Sometimes I find that when starting debugging I need to press the reset button on the board to get the app running, or resetting the board from the connected devices view. "

RE: J-Link Debugger Hang Issue

brushlow — Thu, 20 Jul 2023 13:12:52 GMT

Hi Segurd,

Sure thing, see below.

IMPORTANT: The data below could contain sensitive or confidential information about your environment.
If you do not wish this to be seen by others, please make sure to remove it before sharing.

For help and support, visit the Nordic DevZone at https://devzone.nordicsemi.com/.

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Thanks

RE: J-Link Debugger Hang Issue

Sigurd Hellesvik — Thu, 20 Jul 2023 11:16:51 GMT

Hi,

For us to have a better look at your system, can you Generate support information and upload it here as a txt file?
If you do not want to share all your data in a public case, you can either REDACT information you do not want to share, or I can convert this case to a private case.

Regards,
Sigurd Hellesvik