circuitpython/ports/stm32/boards/PYBD_SF2/deploy.md

### Pyboard-D via mboot

For the pyboard D-series you can enter the mboot DFU bootloader by executing `machine.bootloader()` at the MicroPython REPL. Alternatively, mboot can be entered by holding down the USR button, pressing and releasing the RST button, and continuing to hold down USR until the LED is white (4th in the cycle), then let go of USR while the LED is white. The LED will then flash red once per second to indicate it is in USB DFU mode. You can then program the firmware using a DFU programmer, eg [dfu-util](http://dfu-util.sourceforge.net/) or [pydfu.py](https://github.com/micropython/micropython/blob/master/tools/pydfu.py).
ports: Add board.json for all boards. This will be used by https://micropython.org/download/ to generate the full listing of boards and firmware files. Optionally supports a board.md for additional customisation of the download page, as well as deploy.md for flashing instructions. Signed-off-by: Jim Mussared <jim.mussared@gmail.com> 2021-09-01 10:08:30 -04:00			`### Pyboard-D via mboot`

			For the pyboard D-series you can enter the mboot DFU bootloader by executing `machine.bootloader()` at the MicroPython REPL. Alternatively, mboot can be entered by holding down the USR button, pressing and releasing the RST button, and continuing to hold down USR until the LED is white (4th in the cycle), then let go of USR while the LED is white. The LED will then flash red once per second to indicate it is in USB DFU mode. You can then program the firmware using a DFU programmer, eg [dfu-util](http://dfu-util.sourceforge.net/) or [pydfu.py](https://github.com/micropython/micropython/blob/master/tools/pydfu.py).