The original URL www.arm.com/products/processors/cortex- … andard.php redirects me to https://developer.arm.com/tools-and-sof … dded/cmsis; from there what am I going to have to download for my SAMD21 Mini Breakout?
We only support this board under Arduino and following the directions in the [hookup guide in the “Setting up Arduino” section should grab the file you need. I don’t know if that will work in your application, but it might be a good starting point.
In any case, those directions will allow you to program the board in [Arduino.](https://www.arduino.cc/en/Main/Software)](SAMD21 Mini/Dev Breakout Hookup Guide - SparkFun Learn)