Idea-Fly IFLY-4 APM 2.6

Hello,

I am a university student and i choose for final year project to make and code an Obstacle avoidance system for the title referred drone.

To be able to start doing it i need to have the source code of the board,i found several links that end up to the source code but i could use it because i want to use arduino (arduPilot modded) to make the changes to the code. I even tried to use Make and again i could use/see the source code.

So i am asking for help here if someone can show me how to use the source code and also where to actually obtain it .

Thank you .