[PARPORT] Block transfers?

From: Nick Papadonis (nick@coelacanth.com)
Date: Wed Jan 30 2002 - 21:03:26 EST

  • Next message: Tim Waugh: "Re: [PARPORT] Block transfers?"

    Hi.

    My program uses the userspace parport driver to control a JTAG
    interface. Preferably I would like to use full width operations
    on the port, however since parport0 is a character device, I must r/w using
    certain bytes.

    I.e. I use the following to write to the data byte:

    result = ioctl(fd, PPRDATA, &d);

    Using many ioctl calls are slowing my parport access down greatly.
    I'm acheiving a ~90kHz data rate on a port that should handle ~200kHz.

    Is there a way to read/write a block of data out over the port at a
    time?

    Any insight appreciated.

    Thanks 

    -- 
Nick

    --  To unsubscribe, send mail to: linux-parport-request@torque.net --
--  with the single word "unsubscribe" in the body of the message. --

    This archive was generated by hypermail 2b29 : Thu Jan 31 2002 - 01:24:11 EST