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circuitpython/ports/stm/boards/espruino_pico
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Artyom Skrobov b40d072648 [stm] implementation of audiopwmio 
Based on nrf PWMAudioOut by @jepler and stm PulseOut by @hierophect

Tested on a Meowbit
 		2021-03-26 13:18:01 -04:00
..
README.md Fix up end of file and trailing whitespace. 2020-06-03 10:56:35 +01:00
board.c Add `board_deinit` for use with sleep 2020-12-08 10:52:25 -08:00
mpconfigboard.h run code formatting script 2021-03-15 19:27:36 +05:30
mpconfigboard.mk [stm] implementation of audiopwmio 2021-03-26 13:18:01 -04:00
pins.c create copy 2020-03-11 18:13:06 -04:00

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.