NAME

       gpib — General-Purpose Instrument Bus (GPIB) driver

SYNOPSIS

       Either of the pcii(4) or tnt4882(4) drivers use this driver as the backend.

DESCRIPTION

       The gpib 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.

   Example
       The following example code queries the device provided as argv[1] for its identification response.

       /* 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);
       }

FILES

       /dev/gpibNib   Main device node to access the driver.

       /dev/gpibNl    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.

SEE ALSO

       gpib(3), pcii(4), tnt4882(4)

HISTORY

       The gpib driver was written by Poul-Henning Kamp, and first appeared in FreeBSD 5.4.

AUTHORS

       This manual page was written by Jörg Wunsch.

Debian                                          January 24, 2010                                         GPIB(4)