Re: [PARPORT] Bidirectional access to parallel port (JAVA)

From: Ramón Suárez Alvarez (rsuarez@dynasty.es)
Date: Wed Feb 26 2003 - 11:28:36 EST

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    Thank you very much.

    I supposed that the commAPI had the same problems as in Windows: reading
    from parallel port didn't work. But, of course, it is not neccesary the same
    code as in Windows. ˇˇIt's Linux!! I need to prove, saying that the mode is
    EPP.

    I will tell here my results.

    Thank you again.

    ----- Original Message -----
    From: "Andreas Fester" <Andreas.Fester@eigner.com>
    To: "Ramón Suárez Alvarez" <rsuarez@dynasty.es>; <linux-parport@torque.net>
    Sent: Tuesday, February 25, 2003 4:43 PM
    Subject: Re: [PARPORT] Bidirectional access to parallel port (JAVA)

    > Hi Ramón,
    >
    > you could use the Java Communications API
    > (http://java.sun.com/products/javacomm/), but SUN only provides
    > drivers for Solaris and Windows. Maybe this package helps:
    > http://mavnet.dynip.com/doc/packages/IBMJava2-JAVACOMM/docs/
    >
    > I have not tried it though, but it sais that it supports
    > IEEE1284 parallel ports.
    >
    > Regards,
    >
    > Andreas
    >
    >
    > Ramón Suárez Alvarez wrote:
    >
    > > Hi all;
    > >
    > > I'm a newbie in this mailling list and I need some help with this
    problem:
    > >
    > > I'm developing a program in Java to control a parallel printer, sending
    > > directly to the printer it's escape sequences docummented by the printer
    > > manufacturer.
    > >
    > > In Windows I had a sys file provided by the printer manufacturer and
    using
    > > CreateFile, ReadFile and WriteFile, I sent commands to the printer
    without
    > > problems. Now, I need to do the same in Linux. Reading in Internet, I
    found
    > > that it's possible to use directly the lp device and, from Java, using
    > > FileInputStream and FileOutputStrem objets, open, read and write the
    file
    > > /dev/lp0. But it doesn't work. I be able to write but trying to read, I
    > > receive exceptions. The question is:
    > >
    > > How can I use the parallel port as a bidirectional port? Do I need to
    make
    > > something special to use the standard parallel port driver in linux? Do
    I
    > > need to write some c code to access to the port and then make a JNI
    access
    > > from Java to this c code? any idea?
    >
    >
    >

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