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Thread: Problems with web-cam ISO traffic on DE2 board

  1. #1
    Join Date
    Nov 2008
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    Default Problems with web-cam ISO traffic on DE2 board

    My project is to connect USB webcam (device) to Altera DE2 Board(host), and get isochronous video stream.

    Iím using DE2_NIOS_HOST_MOUSE_VGA demonstration as my start-point reference

    Thus far Iíve managed to get device and configuration descriptors from the webcam, complete probe-and-commit procedure and choose one of iso interface endpoints. As I understand, at this point webcam should start sending ISO data.

    My problem is that I donít get any iso data from the webcam after completing these stages.

    As I see it, there may be 2 problems:
    1. Phillips USB controller is not configured in the right way to receive ISO data.
    2. I miss some critical stage.

    So the questions are:
    1. Is Phillips USB controller has to be configured in a special way to receive ISO traffic (except ISTL buffer size definition)?
    2. Are the stages Iíve done enough to trigger the webcam to send ISO packets? Do I miss any stage that is critical to get ISO stream?
    3. How to define ISO starting frame in the PTD?

    Thank you in advance
    Last edited by cykonah; January 27th, 2009 at 03:19 AM.

  2. #2
    Join Date
    Apr 2010
    Rep Power

    Default Re: Problems with web-cam ISO traffic on DE2 board

    plz i am trying to connect webcam to altera de2 board for getting image and processing it. can u guide me how to interface web cam to board.plz help me

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