Initialization of USB3DR peripheral devices on STM32MP257F-DK

[OKN]

In the STM32MP257F-DK Linux BSP, I believe that the initialization of the USB3DR peripheral devices (TCPP03-M20, CC1_EN, CC2_EN) is performed by the M33 core executing the following program:

/usr/local/Cube-M33-examples/STM32MP257F-DK/Demonstrations/USBPD_DRP_UCSI/lib/firmware/USBPD_DRP_UCSI_CM33_NonSecure_stripped.elf

Where can I find the source code of this program?

I have created a board using the STM32MP255F with a configuration similar to the STM32MP257F-DK board.
The hardware configuration around USB3 is the same, but some pinctrl and I2C bus channels are different.
Therefore, I would like to modify and use USBPD_DRP_UCSI_CM33_NonSecure_stripped.elf.

[PatrickF]

Hi @OKN 

I'm not expert of this, maybe look into :

https://github.com/STMicroelectronics/STM32CubeMP2/tree/main/Projects/STM32MP257F-DK/Demonstrations/USBPD_DRP_UCSI

https://github.com/STMicroelectronics/STM32CubeMP2/tree/main/Middlewares/ST/STM32_USBPD_Library

Regards.

[OKN]

Hi

I'll check out the GitHub link you provided.

By the way, why do you perform some initialization in M33?

Would there be any problems if you performed it in A35?

Thanks.