Re: [PARPORT] Grabbing a parallel port

From: Tim Waugh (
Date: Mon Jul 14 2003 - 09:57:29 EDT

  • Next message: Anders Norrbring: "[PARPORT] Parallel port device..."

    On Mon, Jul 14, 2003 at 01:14:48PM +0100, Philip Graham Willoughby wrote:

    > Below my sig is the code I have currently, with the point-of-failure
    > indicated (search for /*). I know how to write the code I want using
    > direct access to the parallel port on the PC, but I wish to use the
    > kernel parport stack so that it will work if I bung it on a sun too.

    I think you need to take a closer look at the documentation.

    > static void
    > attach (struct parport *thing)
    > {

    This is your 'attach' callback, called to ask your driver if it wants
    to use this port or not. If it does, it should call

    > if (thing->devices == NULL) /* It is. Why? */

    Because you haven't registered one.


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