101 lines
3.1 KiB
Groff
101 lines
3.1 KiB
Groff
.\" Copyright (c) 2010, Joerg Wunsch
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd January 24, 2010
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.Dt GPIB 4
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.Os
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.Sh NAME
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.Nm gpib
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.Nd General-Purpose Instrument Bus (GPIB) driver
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.Sh SYNOPSIS
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Either of the
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.Xr pcii 4
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or
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.Xr tnt4882 4
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drivers use this driver as the backend.
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for driving an IEEE-488 bus, also called
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IEC-625 (or just "IEC bus"), or HP-IB (Hewlett Packard Instrument
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Bus), or GPIB (General Purpose Instrument Bus).
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The device can become either a listener, talker, controller, and
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in particular a master controller on the bus.
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.Ss Example
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The following example code queries the device provided as
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.Va argv[1]
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for its identification response.
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.Bd -literal
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/* compile with: cc -O -o ibtest ibtest.c -lgpib */
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#include <stdio.h>
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#include <stdlib.h>
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#include <err.h>
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#include <vis.h>
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#include <gpib/gpib.h>
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int
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main(int argc, char **argv)
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{
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int dmm;
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unsigned char buf[100];
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char vbuf[sizeof buf * 4];
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/* DVM */
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dmm = ibdev(0, (argc > 1? atoi(argv[1]): 7), 0,
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T10s, 1, 0);
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if (dmm < 0)
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errx(1, "ibdev = %d\\n", dmm);
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ibwrt(dmm, "*IDN?\\r\\n", 7);
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ibrd(dmm, buf, sizeof buf - 1);
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strvisx(vbuf, buf, ibcnt, VIS_WHITE | VIS_CSTYLE);
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printf("%s\\n", vbuf);
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return (0);
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}
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.Ed
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.Sh FILES
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.Bl -tag -width /dev/gpibNNib
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.It Pa /dev/gpib Ns Em N Ns "ib"
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Main device node to access the driver.
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.It Pa /dev/gpib Ns Em N Ns "l"
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Listen-only entry to the driver.
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When opening, an instrument can send data to this device on the
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bus in an unaddressed mode, for example hard-copy printer data.
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.El
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.Sh SEE ALSO
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.Xr gpib 3 ,
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.Xr pcii 4 ,
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.Xr tnt4882 4
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.Sh HISTORY
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The
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.Nm
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driver was written by Poul-Henning Kamp, and first appeared in
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.Fx 5.4 .
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.Sh AUTHORS
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This manual page was written by
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.An J\(:org Wunsch .
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