Nucleo-U385RG-Q is not resetting properly at 1.8V

[alexceltare2]

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  https://github.com/stm32duino/Arduino_Core_STM32/releases/latest
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Describe the bug
When uploading any code into Nucleo-U385RG-Q, the board doesn't reset properly and it hangs at 1.8V. If uploading via STM32CubeIDE, it does not have any problem.

Arduino IDE debug message if using 3.3V:
Application is running, Please Hold on...

Arduino IDE debug message if using 1.8V:
Warning: The core is locked up

To Reproduce
Change jumper JP5 to 1.8V, upload any code and see it not performing.

Expected behavior
Once the Blink program is uploaded, the board should show LD2 LED blinking every second.

Desktop (please complete the following information):

• OS: Windows 11
• Arduino IDE version: 2.3.5
• STM32 core version: 2.10.1
• Tools menu settings if not the default:
• Upload method: STMCubeProgrammer SWD

Board (please complete the following information):
Nucleo-U385RG-Q

Additional context
Add any other context about the problem here.

[fpistm]

Hi @alexceltare2
I've been able to reproduce.
Upload thanks mass storage works as expected, only the STMCubeProgrammer SWD failed at 1.8V.
I've also tried with STM32Cube IDE but it does not work (On Linux).
Will check on Windows too.
This seems not link to the binary but to the STMCubeProgrammer cli. so convert it as a discussion.
You can use the mass storage upload as a workaround.

[fpistm]

Same issue on Windows.
All tools are latest version:

• STLink firmware V3J16M7.
• STM32CubeProgrammer V2.19.0
• STM32Cube IDE 1.18.1

So I guess it requires to wait update

[alexceltare2]

Mass storage doesn't work on my board since I think it has been removed after the discontinuation of Mbed OS. All i got is:

NOD_U385RG not found. Please ensure the device is correctly connected.
Failed uploading: uploading error: exit status 7

So STMCubeProgrammer SWD is my only way around. OpenOCD STLink (SWD) doesn't work either. Firmware on the embedded STLink chip is "V3J16M7 STM32 Debug+VCP" at MCO Output HSE/3 8Mhz

[alexceltare2]

ok, I spotted a setting in the ST-Link Upgrade where I can add Mass storage so is all good now.

[fpistm]

Fine. Thanks for the feedback. Anyway, I will ask internally if this issue is known.