RE: [PARPORT] Nibble mode???

From: Mark Cianfaglione (markcia@nortelnetworks.com)
Date: Mon Apr 23 2001 - 14:44:02 EDT

  • Next message: Tim Waugh: "Re: [PARPORT] Nibble mode???"

    Thanks...

    I've noticed that if I read data from the parport in ECP mode it will ALWAYS
    return the size of the buffer no matter how much data is actually gathered.
    Well... Except in an error condition. I would think that the parport module
    will return the number of "filled" data points as opposed to the size of the
    buffer... Am I missing something??? (I have done that a lot... Ask my
    wife...)

    Mark

    -----Original Message-----
    From: Tim Waugh [mailto:twaugh@redhat.com]
    Sent: Monday, April 23, 2001 11:30 AM
    To: Cianfaglione, Mark [SKY:QD43:EXCH]
    Cc: linux-parport@torque.net
    Subject: Re: [PARPORT] Nibble mode???

    On Mon, Apr 23, 2001 at 10:56:23AM -0400, Mark Cianfaglione wrote:

    > Apr 21 20:47:57 localhost kernel: parport0: cpp_mux: aa55f00f52ad51(87)
    > Apr 21 20:47:57 localhost kernel: parport0: cpp_daisy: aa5500ff(80)
    > Apr 21 20:47:57 localhost kernel: parport0: assign_addrs: aa5500ff(80)
    > Apr 21 20:47:57 localhost kernel: parport0: In mode 0x04
    > Apr 21 20:47:57 localhost kernel: parport0: Using nibble mode
    > Apr 21 20:47:57 localhost last message repeated 2 times
    > Apr 21 20:47:57 localhost kernel: parport0: device reported incorrect
    > length field (105, should be 107)
    > Apr 21 20:47:57 localhost kernel: parport0: In compatibility (forwardidle)
    > mode

    This is just debug output. Parport uses nibble mode to collect Device
    ID information at the moment.

    Tim.
    */

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