Adding a BOOT0 switch

[dhylands]

Since I flash new versions of MicroPython quite frequently, I decided to add a BOOT0 switch.

The pyboard is mounted in a SliceCase

Boot-Switch-800.jpg (225.96 KiB) Viewed 6531 times

The red wire runs to 3.3v and the white wire runs to the pull-down resistor on BOOT0. A dab of hot glue holds the switch in place on the processor.

Now I can enter DFU mode by pressing BOOT0 and RESET.

[pfalcon]

Good use for MCU - now it doesn't take so much space uselessly

[mbirth]

Do you only have to short BOOT0 and 3V3 during reset, or does it have to be permanently shorted during the whole flashing process?

[dhylands]

The BOOT0 switch only needs to be held while the board resets. You can release it a split second after releasing the reset button.

The red/yellow/blue LEDs turn on dimly, which is your indication that you're in DFU mode.

Incidently, with the new firmware, you can use:

Code: Select all

pyb.bootloader()

to enter into DFU mode, so the only time I need to use the BOOT0 switch now is when I totally bork the board.

[mbirth]

Awesome! Thank you!