You can find the whole software and sources in our git repository on GitHub: https://github.com/rad1o/f1rmware
Please read the build instructions there. It's also a good starting point to find out how to write your own firmware/software for the rad1o.
The code is released under GPLv2/BSD license (we use GPL libraries, but our code will be dual licensed)
Please have a look at the hardware page for data sheets of the components.
The base firmware provides you with a set of functions to control the rad1o