Argenis Bilbao

overcoming the 12 cycle GPIO waitstate for TFT LCD

Discussion created by Argenis Bilbao on Feb 13, 2010
Latest reply on Apr 13, 2010 by Juan Aguirre

Hello guys,

 

Is there any way to overcome the 12 cycle GPIO wait state in the coldfire MCF52255?

 

I am driving a 320x240 pixel TFT LCD with GPIO but I am getting slow frame rates because this bottleneck.

 

The LCD has a integrated controller that generates the VSYNC and HSYNC signals. All I have to do is put the pixel color on port TJ and port TI, then lower and rise a clock signal (just another pin in port UA).  

 

Any suggestions?

 

Message Edited by s4w2099 on 2010-02-13 06:08 PM

Outcomes