debugging MCUboot

RE: debugging MCUboot

Hung Bui — Tue, 21 Oct 2025 12:31:46 GMT

Hi Jason,
My understanding is that you want to debug your application, not MCUBoot it self, correct ?
If it's the case I don't see why it wouldn't work.

Dfu_target is our library to support DFU, it doesn't belong to MCUBoot. DFU_target run in the application, not in MCUBoot.

Have you build your application with -Og ?

I did a quick test here and can debug an application (attached) with MCUBoot included.

Please check if you can debug this application (NCS v3.1.0)
devzone.nordicsemi.com/.../8688.peripheral_5F00_lbs_5F00_smp.zip

RE: debugging MCUboot

Jason — Tue, 21 Oct 2025 12:13:41 GMT

I finally got RTT viewer to work and it looks like I have an exception before it even gets to main. This is the first time I've managed to get anything from the logging. And I've noticed that I now get a stack trace in the debugger. If I connect with RTT with "force go on connect" and then if I use the debugger pause button then I can see where it gets stuck. But I have no way of stepping through the code prior to the crash.

RE: debugging MCUboot

Jason — Tue, 21 Oct 2025 08:25:51 GMT

I want to step into my "usb_savedata_init()" function

It;s the same if I remove my code and just put in a while loop with k_msleep