Mcuboot location in-tree/out-of-tree with sysbuild

RE: Mcuboot location in-tree/out-of-tree with sysbuild

Vidar Berg — Thu, 23 Jan 2025 13:48:05 GMT

[quote userid="114275" url="~/f/nordic-q-a/118023/mcuboot-location-in-tree-out-of-tree-with-sysbuild/519770"]Maintaining my own fork for few lines of additional init code seems problematic.[/quote]

I probably wouldn't have considered this either if it was just a few lines of code. Maybe just add the changes manually or through a patch file.

[quote userid="114275" url="~/f/nordic-q-a/118023/mcuboot-location-in-tree-out-of-tree-with-sysbuild/519770"]Your suggestion looks interesting, but how to add custom initialization code at board definition level? I didn't find any recipe?[/quote]

Have you defined your own custom board yet? In that case, you can specify additional source files to be included in the build when your board is selected. For example, like how the thingy53 board include the board.c file here: https://github.com/nrfconnect/sdk-zephyr/blob/763e6a8ab82bd1a346a9b14a4b8fc7509c8441b6/boards/nordic/thingy53/CMakeLists.txt#L6 that will run this setup() function: https://github.com/nrfconnect/sdk-zephyr/blob/763e6a8ab82bd1a346a9b14a4b8fc7509c8441b6/boards/nordic/thingy53/board.c#L47

RE: Mcuboot location in-tree/out-of-tree with sysbuild

m5k8 — Thu, 23 Jan 2025 13:29:06 GMT

[quote userid="4240" url="~/f/nordic-q-a/118023/mcuboot-location-in-tree-out-of-tree-with-sysbuild/518444"]you can define your own board with some custom initialization code for the GPIOs.[/quote]

Maintaining my own fork for few lines of additional init code seems problematic.

Your suggestion looks interesting, but how to add custom initialization code at board definition level? I didn't find any recipe?

RE: Mcuboot location in-tree/out-of-tree with sysbuild

Vidar Berg — Wed, 15 Jan 2025 13:22:47 GMT

Hello,

You can maintain your own fork of the SDKs bootloader project if you want to modify the code, see https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/dev_model_and_contributions/adding_code.html#workflow_4_workspace_application_repository_recommended . Alternatively, if you only need to control the GPIOs before the bootloader runs, you can define your own board with some custom initialization code for the GPIOs.

Best regards,

Vidar