Using STM32 tools IDE, Yocto, etc

[jochipochi]

Hello Everyone,

I'm trying to use the STM32MP1 SOM with a different custom made carrier board.
For this I am using the STM32CubeIDE to generate the DTS and I'm compiling my own linux distro with Yocto (The way the ST documented)

Do you guys have a .ioc file or yocto BSP layer we can use to get started?
I'm currently just editing by hand from the sources:
https://github.com/OLIMEX/linux-olimex/tree/release-20230217-v5.10.105/arch/arm/boot/dts

And that is proving to be a bit of a pain compared to just having a BSP for yocto.

In any case. I will use this post to update on my progress in case anyone wants to follow along.

[mx73]

I am also looking for a Yocto BSP.
In my case I am evaluating an STMP157-OLinuXino-LIME2 board, i.e. no custom hardware devices to support (at least for now), but I need to create custom images with Yocto.

It is really a pity that there is only a binary Linux image available for this board and I wonder why Olimex is not providing a clean Yocto BSP. I think this would boost their product significantly.

Did you make any progress with your attempts?
Have you tried any of the following sources?
- https://github.com/koansoftware/koan-stm32mp-bsp-repo
- https://github.com/STMicroelectronics/meta-st-stm32mp

Best regards,
Edgar

[LubOlimex]

What do you mean with "there is only a binary Linux image available for this board" ?

There is fully open source image with all sources and build instructions available, no binary blobs inside the image. Refer to this document for more info on Olimage Linux:

https://github.com/OLIMEX/OLINUXINO/blob/master/DOCUMENTS/OLIMAGE/Olimage-guide.pdf

[mx73]

Yes, you are right.
However, this build system seems to be proprietary in the following respect: If I want to add some features to my image I simply do not know where to start.

My ultimate goal is to get Flutter running on the OLIMEX board.

If I had a Yocto BSB to build on, I could add the respective Yocto recipes that exist for Flutter.

With the OLIMEX Build system it is not even obvious for me how to build the cross-compile toolchain.

Can you point me in the right direction?

[JohnS]

cross-compile toolchain

Install via distro and /or such as https://microcontrollerslab.com/cross-compilation-toolchain-for-arm-example-with-raspberry-pi/

John

[mx73]

@JohnS:
OK, thanks. But that's certainly only one part of the story.

I will need a custom splash image, etc.

I am afraid, modifying the Olimage build scripts until every bit is in place will be very time consuming and painful.

Therefore again, a Yocto BSP would be a great help. Has anybody managed to successfully build a bootable image for the board with Yocto?

@jochipochi: Have you made any progress? You said that you will use this post to report on your progress.

[JohnS]

@JohnS:
OK, thanks. But that's certainly only one part of the story.

I will need a custom splash image, etc.

Put the whole image under some directory (*), change what you wish, move it all to whatever you want to boot from (SD card or whatever). Boot it. Done.

(*) You can mount it that way if it's easiest, else copy it.

Any Olimex scripts will just help you see what if anything needs a bit of care.

The common case is you have an SD card. Use dd to copy it to your hdd, then use mount -o loop, change as needed, umount it, dd it to another SD card (or the same one).

John