OK, that looks like the right way. But there is still a thing: the article reads ARM and this code is for openRISC 1200. Also this uses an OS called: mselOS

Something is wrong.

https://github.com/ProjectVault/orp/blob/master/mainpage.dox

The dev board in the picture gallery says that it's an openRISC softcore.

Maybe they've migrated to an ARM in the real formfactor?

EDIT: Here are the ARM drivers in the OS. https://github.com/ProjectVault/orp/tree/master/software/os/... It's a CortexM.