mattallen37:
Ah, I had the board set to SparkFun Pro Micro, so most likely the registers are called something else (since it uses the AtMega32U4 instead of the AtMega328). Setting the board to Uno, it compiles fine. Thanks!
That doesn't make sense? Could you link to the SparkFun pro board you are talking about, I would think they all use a 328 micro.
Lefty