Issue with Nucleo L476 board and access to internal flash memory

[Marco]

Hello,
I have a Nucleo L476 board with the latest version of Micropython loaded, ST-Link has the latest firmware.
REPL is ok and I can interact with the board, but the file explorer from PC does not see the content from flash memory,
but 2 files: MBED.HTM and DETAILS.TXT. So no boot.py and no main.py.
When I load a file from the PC on it, it is gone the next time I connect it and there is always only the MBED and DETAILS file.
When I call uos.getcwd() in Micropython I get '/flash' and uos.listdir() returns 'boot.py', 'main.py' and 'pybcdc.inf' (but no MBED and DETAILS).
The command pyb.usb_mode() returns me 'VCP+MSC'.
So the PC doesn't see the flash memory from the board, but another drive that is 3 Mb and has something to do with MBED,
and vice versa the board does not see the contents of the drive that the PC sees.
What can I do to make the PC see the flash memory from the board?
Thanks for your help
Marco

[ErranS]

Hello Marco,

The two files that you see, MBDT.HTM and DETAILS.txt are on the ST-LINK portion of the board.

I believe that in order to see internal flash memory on the L476 you will have to connect a USB cable to PA11 / PA12.

Also, check that the L476 device is USB-OTG capable. If it is not, then you will not be able to get to where boot.py and main.py are located.

~E

[Marco]

Hello EransS,
I have now connected RX and TX to PA11 and PA12 with a USB-serial dongle but the board does not respond.
Did you mean I should connect the USB lines directly to the board?

Thanks
Marco

[Marco]

Dear EransS,

you were right twice!
The files 'MBED.HTM' and 'DETAILS.TXT' are indeed the contents of the ST-Link.
I have connected the USB directly to PA11/PA12 and I get the content from the L476RG!

Thanks for your kind help and greetings from Italy
Marco

Hello Marco,

The two files that you see, MBDT.HTM and DETAILS.txt are on the ST-LINK portion of the board.

I believe that in order to see internal flash memory on the L476 you will have to connect a USB cable to PA11 / PA12.

Also, check that the L476 device is USB-OTG capable. If it is not, then you will not be able to get to where boot.py and main.py are located.

~E