The datasheet and user's guide will be your best friend. Be sure to look at programming examples for that device as well. Typically you'll need to do the following:
Initialize clock system and setup peripherals and I/O. (Frameworks generally do all this for you). Read some of the actual code behind the scenes of Energia to see how it actually works.
Once the main hardware is initialized, setup your business logic (variables).
Loop indefinitely (like most embedded systems do)... while (true) anyone?
I hope that helps.
I contributed the A110LR09 Booster Pack library for Energia. Take a look at the source code if you're interested with how to write specific device drivers in C/C++ for the MSP430.