Really cool new bootloader from Microsoft. makecode.com/blog/one-chip-to- Comes on the @adafruit Feather M0 Express.

Its makes updating firmware as easy as double tap reset, drag and drop.

@tannewt @adafruit this is a really great writeup and it was fun reading it and learning about usb mass storage device- based programmers. it would be awesome to see more open hardware, hobbyist friendly programmer / probe projects implementing these types of protocols! (and for more target processors)

@cdxiao @adafruit I'm glad you like it! Check out CircuitPython: github.com/adafruit/circuitpyt

Its internals do a lot of similar work. Right now the USB stuff is only for the Atmel SAMD21 but in the future we'll add other chips.

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