Implement a "switch to bootloader" command

[openlightingproject]

Implement a "switch to bootloader" command

[2bndy5]

just passing this along:

If fhe SDK allows it, add a command to the USB protocol to reboot to the bootloader.

It would seem that it does support this. I haven't found any example yet, but I found this macro in search of how to redirect UART I/O to USB (or vice versa). I imagine that using this defined baudrate is how the unofficial ArduinoCore-pico is automatically resetting the board when re-programming the pico (or other RP2040 based boards).

There's also this library which seems like it would be commonly used by CircuitPython/MicroPython firmware to let the user reset-to-bootloader when the reset button is double clicked.

[kripton]

Fixed with dd2dc2c
@2bndy5: This seems to be some kind of "official" way to do it. It can be enabled in the pico-sdk by adding some #defines to a project, assume it's using the stdio_usb interface. See raspberrypi/pico-sdk@383e88e

Update Oh, wow, I actually didn't read your comment properly. Otherwise I would have included that the day you posted it. my bad!
Actually it is in the pico-sdk but since we are using CDC + other interfaces on the USB interface, so I had to re-implement this.

[kripton]

Reboot-to-Bootloader is now also available via the HTTP API (integrated webserver):
https://github.com/OpenLightingProject/rp2040-dongle/blob/79556f4ebf31f9bb41bdc5a23bae965987fad62d/src/webserver.cpp#L31