USB port 2 cannot be recognized!

[Najib Kassab]

We built a customised board based on the stm32mp175c-dk2, with some changes, one of which was the addition of two USB type-c connectors.

When I try to use the USB in DFU mode, everything works fine, as long as the boot switch is turned off. When I turn the switch on, my computer does not "see" the USB at all. The same image is used on both the stm32mp175c-dk2 and our board. My computer sees the USB in stm32mp175c-dk2, but our board does not.

Anyone who can help me with this problem, as I am unable to establish an ssh connection using ethernet-over-usb?

I want to usb USB_DM/P 2 

in our connector I have change the DNP resistors to use USB 2 instead of USB 1

[PatrickF]

Hi @Najib Kassab​ 

When you talk about 'boot switch on', I assume it is boot from SD-Card.

Could you please share the UART4 console log (assuming you use that one) ?

If SD-Card boot fail (PA13 toggling), then it is needed to dump BootROM traces (https://wiki.st.com/stm32mpu/wiki/STM32_MPU_ROM_trace_analyzer#On_STM32MP15x_lines)

please confirm you are using an oscillator for HSE (as on DK2 board). If you uses a crystal, then you need to change the device tree as only BootROM will autodetect the oscillator Vs Crystal (uBoot rely on DT).

See also https://community.st.com/s/article/FAQ-STM32MP1-bring-up-troubleshooting-guide

Regards.

[Najib Kassab]

hello @PatrickF​  What I meant was that when I turn on the boot switch, I boot from the SD-Card.

Yes, I am using USART4 and ECS-1633-240-BN-TR as oscillators for HSE. There is no failure when booting from SD-card because the PA13 LED is not blinking.