Agilent Technologies FS2010 Guia do Utilizador descarregar pdf (Página 106)

106 Agilent VISA User’s Guide

4 Programming via GPIB and VXI

Sample: Using GPIB-VXI Interface (High-Level) Memory

Functions

This program uses high- level memory functions and the

GPIB- VXI interface to read the ID and Device Type registers

of a device at GPIB- VXI0::24.

/* Read device type register contents */

viIn16(dmm, VI_A16_SPACE, 0x02,

&devtype_reg);

/* Print results */

printf ("ID Register = 0x%4X\n", id_reg);

printf ("Device Type Register = 0x%4X\n",

devtype_reg);

/* Close sessions */

viClose(dmm);

viClose(defaultRM);

}

/*gpibvxih.c

This example program uses the high-level memory

functions to read the id and device type

registers of the device at GPIB-VXI0::24. Change

this address if necessary. The register

contents are then displayed.*/

#include <visa.h>

#include <stdlib.h>

#include <stdio.h>

void main ()

{

ViSession defaultRM, dmm;

unsigned short id_reg, devtype_reg;

/* Open session to VXI device at address 24 */

viOpenDefaultRM(&defaultRM);

viOpen(defaultRM, "GPIB-VXI0::24::INSTR",

VI_NULL,VI_NULL, &dmm);

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Agilent Technologies FS2010 Guia do Utilizador Página 106