I'm not the author of the project I'm using, and I have a question out to the author. In the event that they don't get back to me, I wanted to ask my question here too.
They are using TimerOne as part of the project but that library isn't compiling on the M0. I get this error:
MsTimer2/MsTimer2.h:9:2: error: #error MsTimer2 library only works on AVR architecture
Is there a TimerOne replacement (or upgrade) that works on the M0?
I don't know much about PWM timers or interrupts or anything, so I'm hoping there's an easy replacement library out there.