USB and ST-Link can't be plugged in at the same time for the STM32MP257F-EV1 board

[Carson]

Hello, 

I am trying to work on the STM32MP257F-EV1 development board and am running into an interesting issue. Whenever I have both the USB (For booting) and the ST-Link (For power and using minicom) plugged in at the same time booting the image to the board doesn't work, it will boot up to partition 0x03 and then reconnect and start over until I force cancel it. Is there anything I can do in order to allow both of those to be plugged in at the same time?

Thanks,

Carson

[Olivier GALLIEN]

Hi @Carson 

Can you please precise in which boot mode you are ? 

Serial boot mode to flash the board or SDCard/eMMC boot mode ? 

Sharing the trace you get on console might help to investigate what's going wrong

Olivier 

[Carson · Accepted solution]

Hi Oliver, 

I figured out that most of my problems stemmed from using ST link to supply power instead of the Jack. When I changed that the problems seemed to go away. Also switching to a linux machine helped. Thanks!

Carson