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circuitpython/ports/stm/boards/espruino_pico
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Scott Shawcroft 4363361c87
Board definition clean up 
Removes:
* AUTORESET_DELAY_MS which never did anything but was introduced
  somehow.
* CIRCUITPY_BOOT_BUTTON in all but one ESP board because they all have
  them. There is a default based on the strapping pins.
* BOARD_USER_SAFE_MODE_ACTION because it was all the same for boards
  with boot buttons. Now the safe mode code manages the message.
 		2022-03-21 17:58:43 -07:00
..
README.md Fix up end of file and trailing whitespace. 2020-06-03 10:56:35 +01:00
board.c board_deinit() everywhere 2021-11-30 11:00:10 -05:00
mpconfigboard.h Board definition clean up 2022-03-21 17:58:43 -07:00
mpconfigboard.mk shrink some boards 2021-12-08 11:57:15 -05:00
pins.c change board dicts to include a common macro with __name__ 2021-09-03 21:03:55 +02:00

README.md

Flashing the Espruino Pico

The Espruino Pico is normally updated via a bootloader activated by the Espruino web app. This approach is not practical for Circuitpython as it takes too much space from the internal filesystem - thus, you will need to follow the instructions for advanced reflashing using the built-in ROM bootloader on all STM32F4 MCUs (instructions sourced from https://www.espruino.com/Pico#advanced-reflashing)

  • Short out the BOOT0/BTN solder jumper on the back of the board - you can do this by drawing over it with a pencil.
  • Install ST's DFU utility on Windows, or dfu-util for Mac or Linux
    • Mac: install with Homebrew: brew install dfu-util
    • Linux: install with apt-get: sudo apt-get install dfu-util
    • Windows: download ST's application or install the Linux subsystem for Windows 10 and follow the linux instructions.
  • Hold down the Pico's button while plugging it into USB (when overwriting Espruino's default firmware)
  • Navigate to the same directory as your firmware.bin file for Circuitpython and run the following command: sudo dfu-util -a 0 -s 0x08000000 -D firmware.bin or use the ST utility on Windows.
  • Restart the board.

To reinstall Espruino, follow the same steps with the latest Espruino Pico binary from espruino.com/binaries. This will reinstall the usual Espruino bootloader. You must un-short the BOOT0/BTN jumper to re-use the original Espruino Bootloader again. If you used a Pencil mark then you may need to use cleaning fluid and a small brush to totally clear out the graphite.