This sample shows you how to compile C programs which directly access the frame-buffer and controls, so that you don't have to use the s2dsdk. This gives you full control of the machine so be careful, I still have things to work out but for my first day with an a320 I think it's pretty good.
If you look at the code included with all the other samples most of it is unused bloat, from other PMP's, my code is a fraction of the size and simpler to understand.
Download the sample from: http://flatmush.juliusparishy.com/a320/HelloWorld.zip
Once you run the sample it will simply change the color of the screen dependent on what buttons you press.
NB: This is a duplicate of the post on the Dingoo A320 Forum, however I thought it would be of interest to some folks here too.