Okay, last week we were on full steam all the time, I've just finished the controller board and its software, the driver is working flawless and fully interrupt-based, the software is also working and now we are almost done, the only thing we are still missing is the full led/switch array, as for now our array got only 9 (3x3) buttons.
The good thing is that almost by the end of the competition we still had no strange/rare/expensive IC employed, just ICs that anyone can buy anywhere.
Here's a small video of the test array running some light test back some days ago, so you can see it is live!
This video is some days old already, we now have the software fully working, I'll post that tomorrow with some live explanation of our circuit, hope you like it!