[Chris Hulbert] is making it easy for Arduino users to program MSP430 chips with a header file that allows you to compile Arduino sketches for the Launchpad. This makes sense, as the growing number… ...

The Arduino IDE programming language is based on C-like syntax. ... To insert a header into another file, use the #include C directive. For example at the top of Arduino.h you'll see: ...

The Arduino IDE supports multiple files by adding more tabs. If you use INO files you’re only adding one at a time, but if you use C/C++ header and source files it’s two at time.