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Altera_Forum's avatar
Altera_Forum
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16 years ago

Green Shade on VGA display

Hi ,

I have build a custom board with CYCLONE III FPGA having VGA interface, RAM , NAND flash .I am using ADV7125 DAC to convert the digital RGB signals from FPGA to Analog signals.When a display a image of 6140x480 - 16 bit resolution on a LCD monitor, I am getting a green shade on the Image.

I have followed the Schematics for VGA as in NEEK board for my custom board also.Please let me know what I am missing ?

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    16 years ago

    You mean the video is there but everything has an odd shade of green? Try putting out a colorbar signal and see what you get.

    Usually the things I look for are:

    1 - Color reversal.

    2 - Color bit reversal.

    Jake