nRF5340 custom board using sysbuild missing "SUPPORT_NETCORE" causing issue to enable b0n build

[Domziy]

Hello,

I have followed the steps of creating custom board files using the latest nRF Connect SDK Intermediate course (Lesson 3) for the nRF5340.  When making a new application of the sample nrf/samples/multicore/hello_world in VS Code and building the code for the nRF5340DK using the added configs in the "sysbuild.conf" file:

SB_CONFIG_BOOTLOADER_MCUBOOT=y

SB_CONFIG_SECURE_BOOT=y

SB_CONFIG_SECURE_BOOT_NETCORE=y

I get no error and I get both MCUBOOT and b0n for the app and net core, but when I build it now using the copied nrf5340dk_nrf5340 board files (which I renamed as instructed in lesson 3) I get an error in the sysbuild.conf file with a missing dependency:

And the missing dependency "SB_CONFIG_SUPPORT_NETCORE" is not configurable. So I am wondering what and where do I need to add/enable in my custom board design so that I can build my project using sysbuild and have both MCUBOOT and b0n?

Best regards,

Domen

I am using:
- nrf5340dk_nrf5340
- nRF SDK v2.6.1
- VS Code

[Sigurd]

Hi!

Sysbuild is in an experimental state. It will work for nordic zephyr boards, it will not work for out of tree boards or non-nordic nordic-soc boards(custom boards), i.e if you are using a custom nRF5340 board, you should not use sysbuild at this early stage of Sysbuild.

[Domziy]

Hello Sigurd,

I see, how I understood sysbuild that it is the new go-to method for multi-image builds that are out-of-tree. Where the nrf5340 has 2 cores I want my whole project (source files for the app_core and net_core + board files) outside the nRF SDK. Is there another way of doing this without sysbuild and if so how?

As I understand for the b0n to be implemented I should now modify the nrf5340dk file in the SDK to conform to my board files and once the sysbuild supports out-of-tree boards I can reimplement my board files and use those?

Best regards,

Domen

[Sigurd]

Domziy said:

I understood sysbuild that it is the new go-to method for multi-image builds

Sysbuild will be the new way for the upcoming NCS 2.7.0 release. But for 2.6.0, this method is not fully ready yet.

For 2.6.0, we are still using child images. https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/config_and_build/multi_image.html#permanent-configuration-changes-to-child-images

[Domziy]

Excellent, is there a timeline for when the new NCS 2.7.0 will be released?

[Sigurd]

The timeline is ~end of June