I have a PXA255 evaluation board on Win CE 4.2 and am trying to integrate it
to a monochrome STN LCD 320x240 panel. They supplied with a reference
display driver which appears to be a derivative of the Microsoft sample
XScale display driver.

By playing with the timing values, I coaxed it to display something - but
the it appears that every other vertical band of 5 pixels is reversed.
Example: if this **^^**^^ is supposed to be the pattern then it display it
as ^^**^^**

Is the software sending the correct data? If so, how can I verify that? Is
there such thing as a STN display emulator? Or is this a timing problem and
thus I should play some more around the LCD controller's register settings?
(Note that I have tried dozens of settings already with not much difference
in the resulting image.) Any advice will be helpful.

Thanks.
Manuel

Re: Display Driver: Testing And Debugging by Steve

Steve
Tue Jun 28 11:52:11 CDT 2005

The PXA signals are reversed for monochrome from what they are in color
modes so the hardware has to change between them. There is nothing you can
do in software to resolve that. Fortunately you can do it with a simple
cable change to the LCD.

--
Steve Maillet
EmbeddedFusion
www.EmbeddedFusion.com
smaillet at EmbeddedFusion dot com



Re: Display Driver: Testing And Debugging by vwzip

vwzip
Tue Jun 28 15:40:59 CDT 2005

It is now working!!! I reveresed the data lines as suggested and that
corrected the problem. Thank you.


"Steve Maillet (eMVP)" <nospam1@EntelechyConsulting.com> wrote in message
news:uIrL$GAfFHA.3848@TK2MSFTNGP10.phx.gbl...
> The PXA signals are reversed for monochrome from what they are in color
> modes so the hardware has to change between them. There is nothing you can
> do in software to resolve that. Fortunately you can do it with a simple
> cable change to the LCD.
>
> --
> Steve Maillet
> EmbeddedFusion
> www.EmbeddedFusion.com
> smaillet at EmbeddedFusion dot com
>
>