Skip to content

Latest commit

 

History

History
54 lines (38 loc) · 2.24 KB

README.md

File metadata and controls

54 lines (38 loc) · 2.24 KB
Raw

ArduinoCore-EFM32 -- Arduino core for Tomu and EFM32HG boards

WORK IN PROGRESS

This repo will eventually house a working Arduino core for Tomu and similar EFM32HG boards.

The EFM32HG is a pretty great chip:

  • ARM Cortex-M+ @ 25 MHz
  • Crystalless USB w/ built-in 3.3V regulator for minimal part count
  • 64 kB flash / 8 kB RAM
  • Capacitive touch sensors
  • Super low-power

And thanks to the Tomu project:

This README will serve as a notepad as I work through the process.

Cribbing a lot from:

Also see:

Plan:

  • Start by cribbing basic boards.txt & platform.txt from other ARM Cortex-M0+ projects
  • To start, use Gecko SDK instead of libopencm3 (which supports EFM32HG now) because libopencm3 doesn't have all the peripheral libraries built out yet (particularly interesting to me are LEUART, USART (for SPI & UART), MSC (for self-programming of flash to emulate EEPROM).
  • Embed Gecko SDK for now, in pre-release I believe the license can allow for this. Eventually make it a separate package that's downloaded?
  • Rely on Tomu's toboot for DFU upload. It seems a good DFU implementation.
  • Rely on Arduino's dfu-util package. Be sure to check out dfu-prefix and dfu-suffix commands to use before dfu-util.

Progress:

  • Create directory structure skeleton
  • Copied bits of SAMD and STFM32 cores to platform.txt and boards.txt
  • Enabled it with: 
    cd ~/Documents/Arduino/hardware
mkdir todbot && cd todbot
ln -s ~/projects/ArduinoCore-EFM32 .
    And then getting it to be seen by opening Boards Manager window then closing it (protip: Use System keyboard shortcuts to assign Cmd-Shift-B to "Board Manager...")