I am currently working on STM32MP257D USB development in a bare-metal environment (without Linux/USB middleware).

I am implementing the USB functionality directly using the STM32MP2 USB controller/registers and am looking for someone who has experience with or is currently working on:

• STM32MP257D USB Host/Device

• USB controller initialization at register level

• USB EHCI/OHCI/xHCI-related implementation on STM32MP2

• USB hub communication and enumeration

• Bare-metal USB driver development on STM32MP257D

If anyone has worked on STM32MP257D USB in bare metal, I would really appreciate any guidance, example code, register-level documentation, or discussion about the implementation.

In particular, I am currently working on USB Host and external USB hub communication, so experience in this area would be especially helpful.

Thanks!