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GPIB(4) Device Drivers Manual GPIB(4)

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.
January 24, 2010 Debian