Getting FLASH_MAP dependency warning when trying to migrate build systems to sysbuild

RE: Getting FLASH_MAP dependency warning when trying to migrate build systems to sysbuild

Alfredo Antolinez — Thu, 02 Jan 2025 14:56:31 GMT

Excellent! Thank you for the clarification. Now I feel I have a better understanding of how sysbuild works.

RE: Getting FLASH_MAP dependency warning when trying to migrate build systems to sysbuild

Sigurd Hellesvik — Thu, 02 Jan 2025 14:27:53 GMT

[quote user="Alfredo Antolinez"]If I was to go with the approach of just using mcuboot.conf to overlay (A), what is the recommended method of adding device tree overlays into the sysbuild structure?[/quote]

If you are good with generic dts overlays for all boards, that would be mcuboot.overlay.

[quote user="Alfredo Antolinez"]My understanding is that you would add your overlays into sysbuild/mcuboot/boards and the build would automatically detect the dts overlay for multiple boards. But whenever I add a mcuboot directory, the build requires a prj.conf. Since I just want to overlay both dts and (A), what is the correct approach? OR would I be obligated to copy (A) into sysbuild/mcuboot/prj.conf and then I would be able to add the dts overlay?[/quote]

Yea, board specific overlays require prj.conf. In this case you must define the full prj.conf.

RE: Getting FLASH_MAP dependency warning when trying to migrate build systems to sysbuild

Alfredo Antolinez — Thu, 02 Jan 2025 13:57:07 GMT

Hello Sigurd,

Thank you for the reply. I think your clarification really helped me understand how the mcuboot configuration works.

If I was to go with the approach of just using mcuboot.conf to overlay (A), what is the recommended method of adding device tree overlays into the sysbuild structure?

My understanding is that you would add your overlays into sysbuild/mcuboot/boards and the build would automatically detect the dts overlay for multiple boards. But whenever I add a mcuboot directory, the build requires a prj.conf. Since I just want to overlay both dts and (A), what is the correct approach? OR would I be obligated to copy (A) into sysbuild/mcuboot/prj.conf and then I would be able to add the dts overlay?

I am looking for the correct way to add mcuboot dts overlay without having to use build command arguments.

RE: Getting FLASH_MAP dependency warning when trying to migrate build systems to sysbuild

Sigurd Hellesvik — Thu, 02 Jan 2025 12:22:00 GMT

Hi,

MCUboot has a base prj,conf file. Let's call this (A).

sysbuild/mcuboot/prj.conf OVERWRITES (A). This means mcuboot configueation becomes only sysbuild/mcuboot/prj.conf.

sysbuild/mcuboot.conf OVERLAYS (A). This means mcuboot configueation becomes (A) plus sysbuild/mcuboot.conf .

If you want sysbuild/mcuboot/prj.conf to behave the same, you must copy the content from (A) into your project configuration.

Regards,
Sigurd Hellesvik