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circuitpython/ports/stm/boards/espruino_wifi
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Jeff Epler f232aef786 supervisor.mk: Compute USB_DEVICES; remove from boards and ports 
Since Actions passed on the previous commit, where this computed value
was checked against the specified value (if any), this is no net change,
except that we no longer need to specify it for particular boards or
ports.
 		2020-06-23 12:59:01 -05:00
..
README.MD Fix up end of file and trailing whitespace. 2020-06-03 10:56:35 +01:00
board.c create copy 2020-03-11 18:13:06 -04:00
mpconfigboard.h Rework LSE clock init, allow clock overrides 2020-06-04 13:21:29 -04:00
mpconfigboard.mk supervisor.mk: Compute USB_DEVICES; remove from boards and ports 2020-06-23 12:59:01 -05:00
pins.c create copy 2020-03-11 18:13:06 -04:00

README.MD

Flashing the Espruino Wifi

The Espruino Wifi 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/Wifi#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 Wifi'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 Wifi 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.