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