I bought a Feather M0 Basic from a reseller Lawicel however I'm missing the
UF2 boot feature. When I press the reset button two times I just
get a serial and have to program circuitpython using Bossa. The
FEATHERBOOT usb storage drive as described here doesnt show up.
I have a ARM-ICE and wired up the Feather board via SWD. I can re-program the bootloader (first setting fuse to NVMCTRL_BOOTPROT 0x7 as described here ) via ARM-ICE.
However it seems that the Arduino bootloader featherm0bootloader_160305.zip is an old one that doesnt support the UF2 usb storage device programming protocol.
Where can I download a more recent bootloader that supports UF2 ?