Porting AVR code for MSP430 chips

I’ve just finished my first port of code from AVR over to MSP430. I used the garage door code button source because it’s fresh on my mind and I can reproduce the hardware on the TI Launchpad board. This provided a few sets of challenges, and showed me what I can do from the start to make my code more portable. I’ll get into both of those subjects and share the ported code after the break.