Re: [PARPORT] ECP read - FIFO/DMA

From: Tim Waugh (tim@cyberelk.demon.co.uk)
Date: Fri May 12 2000 - 15:32:56 EDT

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    On Fri, May 12, 2000 at 12:07:34PM +0200, Peter Pregler wrote:

    > I did some pio-reading tests and I could read a single frame but the
    > port was not switched back correctly, at least not for my device (a
    > CPiA based webcam). In any case, the block-read interface is not
    > suitable for my purpose. A webcam delivers a stream of indefinite
    > length (due to compression). The end-of-stream is a data pattern in the
    > stream. The current read-functions do ieee-mode switching after reading
    > blocks which must not happen for the webcam. So I see no way to
    > implement streaming read with the current interface. I will try to show
    > some working code that implements what I need.

    If you can think of a good interface that would be great.

    > AFAIK, there is no dma-read code in the current 2.3.x-kernels.

    Of course you are right, sorry.

    Tim.
    */



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