RE: Debugging of blank application on Non Secure nRF9151-DK

wmackowi — Fri, 04 Sep 2026 05:52:42 GMT

Hi Simon,

Thank you for your answer. Thanks to it I have managed to start a debug session.

Best regards,
Wojciech

RE: Debugging of blank application on Non Secure nRF9151-DK

Simon D-M — Thu, 03 Sep 2026 14:19:46 GMT

Hi Wojciech,

I think you are experiencing the same thing as on this other ticket.

Basically, as we just moved from "partition manager" to devicetree partitioning, we currently have in the v3.4.0 an inconvenient setup for the nRF9151/ns builds. The problem is that the default partition is the one to use with a bootloader. But by default when creating a project, no bootloader is selected.

So the reason why your program can't be debugged, is that it doesn't even start in the first place as the MCU never reaches the actual code as the partition are not correct.

You can see on the ticket I linked, that there are 2 possible way to deal with it; You have to either enable a bootloader (SB_CONFIG_BOOTLOADER_MCUBOOT=y) or redefine the partitions in your project (adding nrf9151dk_nrf9151_ns.overlay).

I would recommend you to enable the bootloader as you will most likely need to enable it further in your development when you will implement DFU.

If you need more precision on how to do it, feel free to ask me again :)

Best regards,

Simon