samd XIAO USB Mass Storeage

[devnull]

Firstly HaPpY Christmas to everyone

I am struggling with a SEEED XIAO, I have built and uploaded the firmware to the board, but I am unable to upload any files to it.

I understand that it should mount as a USB storage device and from there I should be able to manage files on the flash, but it does not.

also rshell is unable to upload files:

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> cp bqconfig.py /pyboard
Copying '/Users/pac/docker/upydev/work/projects/aibo/flash/bqconfig.py' to '/pyboard/bqconfig.py' ...
timed out or error in transfer to remote: b'F'

.. and I am now stuck with a device that I can access the REPL but nothing else, yes frozen modules would be ok for a production device, but I am in the development stage and need to manage the file system.

Any suggestions ?

[devnull]

Hmmm...

If I use the firmware from here: https://circuitpython.org/board/seeeduino_xiao/ then the device mounts as a USB mass stureage device but cannot be accessed via rshell.

I can however access the circuitpython version using the 'screen' command.

So how do I enable USB Mass Storeage mode in micropython, I dont see anything in the samd module ?

on the pyboard you can setup:

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pyb.usb_mode('VCP+MSC') # act as a serial and a storage device
pyb.usb_mode('VCP+HID')

But I dont see anything similar in the samd module ?

[devnull]

Oh, discovereed another problem with this device:

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>>> 4.1
Traceback (most recent call last):
  File "<stdin>", line 1
SyntaxError: decimal numbers not supported

Floating point not supported ???

[SunWukong]

Floating point not supported ???

Unfortunately yes, the ATSAMD21 does not have a floating point coprocessor and MicroPython does not emulate floating point calculations in assembler. Floating point instructions

[devnull]

Thanks for helping.

I was able to add floating point support with:

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#define MICROPY_FLOAT_IMPL              (MICROPY_FLOAT_IMPL_FLOAT)
#define MICROPY_PY_BUILTINS_COMPLEX     (0)
#define MICROPY_PY_MATH                 (0)
#define MICROPY_PY_CMATH                (0)

However I still cannot get it to mount as USB mass storeage.

[devnull]

Does anyone know how to add I2C functionality to the machine module ?