[maemo-developers] DSP framebuffer access

[From: Simon Pickering]

Just a quick proof of concept for the 770: 
http://people.bath.ac.uk/enpsgp/nokia770/dsp/framebuffer_test/

The screen changes colour, though it appears that the screen updates 
only happen from time to time so exactly what changes colour, which 
colour it turns, and when is a question of luck.  I'm not sure how one 
should force an update (And perhaps this will have to be from the ARM 
side, I don't know). Any suggestions?

The problem with trying to run the example demo_fb is down to the 
framebuffer already being exported. After a lot of messing about, it 
turns out that all one needs to do is define an array and place it in a 
section created in the FRAMEBUFFER memory section.

I'm not sure there's a FRAMEBUFFER memory section on the n800, in which 
case one may need to use the fbexport functions on the ARM side. I'll 
test that and post some code.

Time to do something with it now... :)

Cheers,


Simon