Can anybody tell me how to get the starter package of open stLinux work?

[MSchn.14]

I already tried the site of st wiki. I only want to get to run the starter package for my work at the university.

I saw that you can flash the sd-card wit windows-os.

Is that right?

I did it with CubeMxProgrammer. And the terminal said programming was succesfully.

After I changed the switches on the backside. The Display stays black.

Any ideas ?

Regards

Max

[PatrickF]

Hello,

I assume you are using DK2 board.

• Did you follow this https://wiki.st.com/stm32mpu/wiki/Getting_started/STM32MP1_boards/STM32MP157C-DK2/Let%27s_start/Populate_the_target_and_boot_the_image ?
• could you check the board led behavior ?
  • https://wiki.st.com/stm32mpu/wiki/How_to_diagnose_a_boot_failure
  • Note that with some Type-C supplies detected as too weak (or not following the USB standard), red led could blink during boot as a warning
• could you put a console and check output messages (need to connect the ST-Link to board micro-B connector in order to have a Virtual Comm Port) ?
  • https://wiki.st.com/stm32mpu/wiki/How_to_get_Terminal
• Could you check/update to the latest ST-Link FW version (V2.J33.M25 is buggy with STM32MP1 and could avoid booting if not connected to a PC) ?
  • https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/stsw-link007.html#get-software

[AndreyN]

Hi Max,

Since you did not specify which board you are using, the following hint might be relevant for you or not.

I have similar problem with my stm32mp157c-dk2 board after flashing new image built with provided Yocto SDK. The attached display remains black. However, if you attach HDMI display, you might see the output there. As mentioned 6 months ago in other thread, there is a problem with current Yocto-based SDK resulting in output going to HDMI even if no cable attached.

Regards,

Andrey.

Edit: add link to HDMI problem discussion thread

[Olivier GALLIEN · Accepted solution]

Hi @AndreyN​ 

Your understanding of the DSI black screen issue 6 month back is not correct.

It was not a wrong connection to HDMI even if no cable but a timing issue during DSI screen initialization.

Anyway this is now fix in delivered software and should not happen any more.

Olivier

[AndreyN]

Thanks for your comments Oliver.

> Anyway this is now fix in delivered software and should not happen any more.

Well, I built default weston image as well as eglfs/qt image using rather recent version of the provided Yocto SDK (download about two weeks ago). In both cases I still can not see output on DSI screen (hdmi works). However, the image on provided SD card works as expected. So I am confident that hardware is OK.

I will try to pull the latest version and see if it helps.

Thanks,

Andrey.

[MSchn.14]

Hello PatrickF,

thank you for all of the ideas. Yes that is correct. I use the STM32MP157C-DK2.

And yes it was the ST-Link FW Version. I had an older one. Now it works!

Thank you very much!

Matix

[AndreyN]

For those who experience DSI display problems on stm32mp157c-dk2 board, this question (and answer) might be relevant.