Reply to MIDIFighter Source

I just wanted to say thank you for making the source code so easy to read, I have been trying to dissect everything, and the comments have been invaluable.

Im pretty new to micro-controller programming, so I do have some questions:
Where are the input/output pins specified? (Im sure its been starring me in the face this whole time)
How does the TLC5924 work?
What does the ADC file do?

Im sure Ill be adding more questions to this.

Thanks for your time,
Ben.