Adafruit Trinket M0 Bare Metal C Programming

This is a very simple example to blink the on-board LED on the Adafruit Trinket M0 with a pure C program. The Trinket M0 uses an ARM Cortex M0+ processor (ATSAMD21E18A).

Relevant Datasheets

• SAMD21E18A
• Adafruit Trinket M0

Dependencies

• Install the cross-compiling toolchain for ARM processors (arm-none-eabi-gcc and arm-none-eabi-binutils)
• Install the flashing utiliy bossa for your platform (for Arch Linux: Bossa AUR)

Building and Flashing

• Plug in your Trinket and check the port (e.g. /dev/ttyACM0 or /dev/ttyACM1)

• Adjust the port in the Makefile accordingly

• Then do the building and flashing:

   make build
   make flash
  

Credits

• This example has been put together by looking at the following very helpful resources:
  • Tutorial on Bare Metal Programming on the Raspberry
  • Run C program on ARM Cortex M3