How to connect the terminal to the STM32MP257-EV1 on the host computer

faye_Lee · ‎2025-06-05

Hi ST,

I have flash the Android images(st-android-13.0.0-2024-07-31-stm32mp257f-ev1-emmc-starter) on the STM32MP257-EV1.

When booting the board(power supply by 5V3A adapter), the leds light as this status,is the board working normally?

When the board booted and CN15 usb connected with PC , I found the device manager show the "Android aosp on stm32mp257f-ev1".When CN21 usb connected with PC, device manager shows up nothing new at all

The board was booting normally?If it is the normal status, how can I connect the terminal to the STM32MP257-EV1 on the host computer?

PatrickF · ‎2025-06-05

Hi, @faye_Lee

If terminal is available (I'm sure for OpenSTLinux on EV1, Android should be same I assume), it should be available in one of the two virtual COM ports which should appear on the PC when connected to the ST-Link USB CN21.

Some help regarding terminal here (shown when running OpenSTLinux): https://wiki.st.com/stm32mpu/wiki/Getting_started/STM32MP2_boards/STM32MP257x-EV1/Let%27s_start/Execute_basic_commands

Regards.

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faye_Lee · ‎2025-06-06

Hi PatrickF,

When I first boot the board, there were two virtual COM ports appeared on the PC when connected to the ST-Link USB CN21 (STM32MP257-EV1's defualt image is OpenSTLinux?). But the second time I booted the board, there were no virtual COM port appeared on the PC. And then I flash the Android image on it, and it has no virtual COM port too. I wonder if my STM32MP257-EV1 board has some issue? How can I verify my STM32MP257-EV1 board whether work in normally status or not? Should I flash the default OpenSTLinux image? How can I flash the default OpenSTLinux image.

PatrickF · ‎2025-06-06

Hi,

Board STLINK virtual COM ports are completely independent of flashed image (it could be seen as an external Serial<->USB converter, like it is for an external ST-LINKV3-SET). They work as soon the USB is connected and recognized correctly as a valid USB.

Maybe check your USB cable (sometimes, there is USB charging cables without data lines).

Regards,

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faye_Lee · ‎2025-06-09

Hi PatrickF,

Thanks for your suggestion, I power the board with tpye-c USB cable, and COM ports appear on the PC now.