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Frame grabber

Discussion in 'Electronic Components' started by Kristian, Apr 15, 2004.

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  1. Kristian

    Kristian Guest

    I need a frame grabber for this
    Omnivision camera module with digital output. Where can I find such a thing?
    I basically want to dump still images from the camera output stream to RAM,
    and be able to access this data with a microcontroller. Is there maybe a
    better way to do this?

  2. Why? It's outputting data, just use your micro to stuff it into RAM.
    You'll want to look up CCIR601 for the format it's in, but it's pretty
    much two parallel 8-bit busses with a clock and some sync bits.
    Depending on your application, you might want to remove the crystal
    and provide your own clock, and/or put it into QVGA mode to slow down
    the data to a rate more easily handled by your micro. In 'normal'
    mode the pixel clock is 13.5 or 27 MHz (half that in QVGA).

    [A dual-port frame buffer to interface to your micro is going to be
    another whole project...]
  3. Kristian

    Kristian Guest

    Why? It's outputting data, just use your micro to stuff it into RAM.

    Do you think an atmega169 could do this, or is it too slow?
  4. Dunno, how fast can it read a couple of bytes and stuff them into RAM?
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