ADV7842 3D_Comb(TBC=Off) , Output picture has small waving noise issue at CVBS input.

Hello,

When I start 3D_Comb function, Output picture has small waving noise issue at when I used CVBS input.

However, this issue doesn't happen when I used Y/C input.

also, when I stopped 3D_Comb, this issue disappear even I used CVBS input.

System contens

3D_Comb = On

TBC=Off

64Mb SDR

It seems this issue is relating 3D Comb function.

How can I fix this?

Regards,

Bogey

  • Hi Bogey,

    Some questions for you:

    Q1. Do you see this issue on EVAL-ADV7842-7511 when you run SW driver?

    Q2. Do you see this issue on EVAL-ADV7842-7511 when you configure with scripts?

    -Matt

  • Hi Matt,

    Here is my answer.

    If you have any more queation, pleae let me know.

    Q1. Do you see this issue on EVAL-ADV7842-7511 when you run SW driver?

    Ans,

    I did not try SW driver.  I don't have SW driver.

    Q2. Do you see this issue on EVAL-ADV7842-7511 when you configure with scripts?

    Ans,

    Yes, I could see this issue on EVAL=ADV7842-7511.

    I use 2 kind SCRIP.  SDR and DDR version.

    Both verions have same issue.

     

    SDR
    94 75 06  ;add-yt(SD-RAM 64Mb)

    94 74 00  ;add-yt(SD-RAM 64Mb)

    94 79 33  ;add-yt(SD-RAM 64Mb)

    94 6F 01 ;add-yt(SD-RAM 64Mb)

    94 60 01  ;add-yt(SD-RAM 64Mb)

    94 7A 66 ;add-yt(SD-RAM 64Mb)

    94 7B 8F ;add-yt(SD-RAM 64Mb)

     

    DDR

    94 75 0A ;

    94 74 00  ;

    94 79 33  ;

    94 6F 00 ;

    94 60 01  ;

    94 7A A5 ;

    94 7B 8F ; 

    It seems ADV7842-7511 has multi issues at 3D_Comb.

    My system had random dots noise and Waving noise..

    I modfied GND line more strong, then randum dots noise has gone.  but, waving noise still remain.

    I can see same issues on EVAL-ADV7842-7511.

    Regards,

    Bogey

    attachment.zip
  • Hi Bogey,

    If you have the EVAL-ADV7842-7511, then you have the software (SW) driver. It is also known as the repeater software.

    If you have EVAL-ADV7842-7511, this software starts automatically.

    If you have EVAL-ADV7842-7511P, this software can be started by typing "startrep" at the command line.

    -Matt

  • Hi Matt,

    Let me ask about Driver Software.

    I used AVESServer 1.03 115k and AVES2 2.04.36.

    Are you menioning this Software?

    If not, please let me know Sfrware name.

    Regards,

    Bogey,

    .

  • Hi Bogey,

    AVES is software that runs on Windows and allows you to read/write registers.

    The software driver (also known as repeater software) runs on the Blackfin processor, uses RS232 for input/output, and configures the ADV7842/ADV7511 to accept a particular input (CVBS, S-Video, VGA, HDMI) and output over HDMI.

    If you have EVAL-ADV7842-7511, this software starts automatically.

    If you have EVAL-ADV7842-7511P, this software can be started by typing "startrep" at the command line.

    Just use RS232 communications program like Teraterm and watch RS232 output after power-up. Make sure AVES software is closed. Only one program can access RS232 port at a time.

    -Matt