STM32MP157-EV kit with led blink

ABayl.2 · ‎2022-11-14

Hello, I have dual core STM32MP157F-EV evaluation kit. I can connect via ST-link and install an application (This is installing on M4). And when I press the reset button, the application is deleted because the M4 core is RAM. I want it to work again every time I reset it. How can I do that ? How can I create an application-specific yocto project?

Erwan SZYMANSKI · ‎2022-12-06

Hello @ABayl.2 ,

Did you not forget that this fw_cortex_m4.sh should be called with a "start" argument ?

If you want to use it, maybe try to do a such script in /etc/profile.d

#!/bin/sh
 
(cd <fw_script_dir> && ./fw_cortex_m4.sh start)

I was not complete in my first answer saying that it was not possible. We have solutions not recommended but I put you here the link of the article: https://wiki.st.com/stm32mpu/wiki/Linux_remoteproc_framework_overview#How_to_use_the_framework

Kind regards,

Erwan.

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Erwan SZYMANSKI · ‎2022-11-14

Hello @ABayl.2,

You are right, M4 firmware are not reloaded by default at reset time, but you can configure it yourself with a little workaround.

As A7 cortex is consider as a kind of master for M4 cortex, it will start first. You can create a script placed in /etc/profile.d (this folder runs all the scripts inside after Linux boot time) that starts your M4 firmware with remoteproc interface. (see https://wiki.st.com/stm32mpu/wiki/Linux_remoteproc_framework_overview)

Kind regards,

Erwan

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ABayl.2 · ‎2022-11-14

Thanks Erwan. I will try it.

ABayl.2 · ‎2022-12-06

My own application I uploaded it to the card using ethernet via CubeIDE. Then I went to /usr/local/project on the card and copied the fw_cortex_m4.sh file inside the project to the /etc/profile.d folder. I pressed the reset button but nothing happened.

Erwan SZYMANSKI · ‎2022-12-06

Hello @ABayl.2 ,

Did you not forget that this fw_cortex_m4.sh should be called with a "start" argument ?

If you want to use it, maybe try to do a such script in /etc/profile.d

#!/bin/sh
 
(cd <fw_script_dir> && ./fw_cortex_m4.sh start)

I was not complete in my first answer saying that it was not possible. We have solutions not recommended but I put you here the link of the article: https://wiki.st.com/stm32mpu/wiki/Linux_remoteproc_framework_overview#How_to_use_the_framework

Kind regards,

Erwan.

In order to give better visibility on the answered topics, please click on 'Accept as Solution' on the reply which solved your issue or answered your question.

ABayl.2 · ‎2022-12-06

Thank you very much Erwan !!! It works...

Erwan SZYMANSKI · ‎2022-12-06

@ABayl.2 ,

Glad to see that your issue has been solved ! Do not hesitate to put the answer as "Best answer" as it can help other member of the forum.

Kind regards,

Erwan.

In order to give better visibility on the answered topics, please click on 'Accept as Solution' on the reply which solved your issue or answered your question.