Manage the Adafruit Feather M0 and M4 boards¶

Install¶

To install the Adafruit Feather M0 and M4 boards,

Ensure the Arduino tools, CLI or IDE, are installed.
Ensure the arduino-cli.yaml configuration file for Arduino-CLI or the Additional boards manager URLs for Arduino IDE includes

https://adafruit.github.io/arduino-board-index/package_adafruit_index.json

Open a Terminal window.
Run

arduino-cli core install adafruit:samd

For more information on the Feather M0,

Please refer to the section Arduino IDE Setup .

For more information on the Feather M4,

Please refer to the section Arduino IDE Setup .

For debugging against the Feather M0 and M4, use the Segger J-Link emulator.

For more information,

Please refer to the section Install utilities for Segger debugger and to the page Proper Debugging of ATSAMD21 Processors on the Adafruit website.

Develop¶

Use the libraries for WiFi¶

Use the libraries for Bluetooth¶

Use the libraries for SD¶

Upload¶

For the Adafruit Feather M0 and M4 boards, Adafruit offers two options to upload the executable to the boards.

The first option is the standard upload procedure through serial over USB.

The second option, called UF2 for USB Flashing Format, turns the board into a mass storage device. Programming is done with a simple drag-and-drop or copy of the executable onto the mass storage device.

Upload using standard USB¶

Before uploading using the standard USB procedure,

Plug the Adafruit board in.
Check the LED on the board is green.
Otherwise, double-press the Reset button on the board to enter boot-loader mode.

For more information,

Please refer to the page Manually bootloading .

Upload using UF2¶

For the Adafruit Feather M0 and M4 boards, this drag-and-drop procedure requires a specific format. The executable needs to be converted into a .uf2 file. The utility for the conversion is provided by the Adafruit nRF52 boards package.

To install the Adafruit nRF52 boards package,