Tino,
We had already two different customers using 800x480 parallel LCD
panels with the DM355. One used the parallel interface directly to the
DM355, and other used LVDS converter from TI (ask for TI FAE for a
recommendation from the catalog based on your screen specifications).
After the right modifications to the video driver screens work without
major problems. You can take a look at the video driver for DM355
included in our free SDK for the code changes we made to get the right
configuration.
If you need support or help with your hardware we offer support
services in DM355 driver development (and more). If you want to it by
yourself you can just drop a mail to the list and I will be glad to
give you quick advice for your questions.
Regards,
Diego Dompe
RidgeRun Engineering.
On Jul 1, 2008, at 10:09 AM, <[EMAIL PROTECTED]> wrote:
Hello Serkan Erdogan,
you wrote that you are using a parallel LCD-panel with the DM355.
I'm very interested in this issue.
What size is your LCD panel? What kind of LVDS converter you are
using. Are there any problems connecting the LCD panel. How do I
resize (scale) the mpeg4-videostream from PAL/NTSC to LCD-size. I
can't find any infos about this topic.
Regards
Tino.
Mit freundlichen Grüßen
i.A. Tino Hoffstädt
Hardwareentwicklung / Hardware Development
Tel.: +49 (0)30 769929 - 0
Fax: +49 (0)30 769929 - 12
[EMAIL PROTECTED]
GSP Sprachtechnologie Gesellschaft für elektronische Sprachsysteme mbH
Teltowkanalstr. 1
D-12247 Berlin
www.gsp-berlin.de
Registergericht: Amtsgericht Berlin Charlottenburg, HRB-Nr.: 22455
Geschäftsführer: Dr. Helmut Loebner
-----Ursprüngliche Nachricht-----
Von: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]
Auftrag von serkan erdogan
Gesendet: Montag, 30. Juni 2008 09:14
An: [email protected]
Betreff: Noise on DM355 LCD interface!
Hii All,
i am a member of dm355 software developer team in my company. we
have a
problem with the noise appearing when we starting a software on dm355.
we are using paralel lcd interface (but the problem is same for SVIDEO
and COMPOSITE outputs with analog lcds) and when our software doing a
lot of memory copy and move the screen is getting very noisy. I have
tested this by different king of software and gui and math libraries.
All time during the first startup of software and the memory activity
is getting higher the noise is reaching the top level. All time when
ddr
ram activity is high (linux memory copy and move actions) the noise
coming high. Otherwise noise is still standing on the screen but
sometimes it becomes intolerable.
How can we solve this problem ??? Is there anybody have this problem
too?? The noise is appearing as some block of pixels beginning to
zigzag horizontally and some thin group of pixel lines are sliding on
screen horizontally again. After the succesfull starting of the
software
the noise is getting very very lower. But when another high memory
activity happens the noise is getting higher again.
My kernel is default montavista linux kernel 4.0 i have done the
software updates but the problem is still exists.
Thank you very much for help ad reading. I need all advices and
ideas to
consider on.
Serkan Erdogan
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