[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 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.

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: ...