I have all the display scanning software working now. I managed to get it displaying four levels of brightness per pixel by scanning the display three times in succession and displaying different patterns each time. The only annoying thing is that the interval that the scan code needs to be called is not constant if you want to get a nice set of evenly spaced brightnesses.

I also got it displaying a random noise animated field which looks pretty awesome.

However now I am going to stop working on this project for some time because I want to focus on neural networks.