Gary,

Is the ghost image flickering or unstable?

Does the ghost image change as the LCD cable is moved?

Thanks,

Hi,
I have the same hardware as Gary: LCD3.5-QVGA-10 LCD Module via the SDK-LH79520-10 application board.

Here is my problem: In lolo, when I use the following command "video-open 6 16", I receive an error:

Quote:

losh> video-open 6 16

Initializing display: width: 240 height: 320 bpp: 16 disp: 6
timeout
command failed
usage:
video-open <display> <bpp>
open the default video device
Supported displays:
0 == LQ039Q2DS53 1 == LQ057Q3DC02
2 == LQ121S1DG31 (12.1) 3 == LM057QCTT03
4 == LM5Q321 5 == LQ64D343 (6.4)
6 == LQ035Q7DB02 (3.5) 7 == LQ10D368 (10.4)

Supported depths: 1, 8, 16, 24

example: video-open 5 16
losh>

but it seems to work because the screen becomes green with a black cursor on the upper left corner.
When I use "draw-test" or "draw-flag" to display an image, it works but the lower half is flickering and unstable and it ghosts other part of the image.
Yes, if I move the cable the display moves too.

When I run linux (from lineo), I have exactly the same probleme!

So is it due to a defective screen or cable? if it does how can I get a new one (it is a blend new Zoom kit)

If it's an other probleme, what can i do to get a stable display?

Thanks a lot
Bruno

We found that the cable supplied with the kit is simply too long- folding it made the image a bit more stable. That was a big pointer to noise/signal integrity issues. So the ultimate solution ended up being very simple- cut the cable to as short of a length as possible. Now the picture is nice and stable..

Posted By gary on 8 Mar 2005 4:47 AM
Hi

I''m currently in the process of driving LCD3.5-QVGA-10 LCD Module via the SDK-LH79520-10 application board.

The problem i''m seeing is that there appears to be display ghosting on the lower half of the display, ie, any bitmap image that''s drawn in the upper half of the display replicates itself in the lower half.

Bitmap images are drawn to the display via a frame buffer that i''ve configured the UPBASE register to point to. I''m not sure if this is related but writing to the first 960 locations (4 lines worth at 240 pixels / line) has no effect on the display. Only information written to offset 960 and above appear of the frame buffer appear on the LCD.

Any help or suggestions much appreciated

Gary

We have released a PCN regarding the issue. Please use this link or you can find it on the LH79520-10 download page.

http://www.logicpd.com/downloads/603/

Thank You,
-Mike Aanenson