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Manage the Adafruit AVR Trinket and Trinket Pro boards

Install

To use the Adafruit AVR Trinket and Trinket Pro 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:avr

For both the Trinket and Trinket Pro, Adafruit acknowledges stability issues with the direct USB upload.

For the Trinket Pro, Adafruit recommends to use a standard FTDI programmer for a better reliability.

For the Adafruit M0 and M4 boards, Adafruit offers a drag-and-drop feature to flash the board. Called UF2 for USB Flashing Format, this option turns the boards into a mass storage device. However, the executable needs to be converted into a .uf2 file. The utility for the conversion is provided with the Adafruit nRF52 boards package.

For more information,

Upload

The Trinket and Pro Trinket boards from Adafruit require a specific procedure.

For the Pro Trinket, Adafruit recommends to use a standard FTDI programmer for a better reliability. For more information,

Proceed as follow:

  • Plug the Adafruit board in.

  • Launch any of the targets All, Upload or Fast.

  • Wait for the message window:

  • Press the Reset button on the board.

  • The red LED starts flashing.

  • Click on OK.

By default, those boards don’t feature a serial-to-USB communication.

For more information,