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Programming Examples

GPIB Programming Examples

Chapter 2 37

Interface Check using VISA and C

This program uses VISA library functions and the C language to communicate with the signal

generator. The program verifies that the GPIB connections and interface are functional.

Launch Microsoft Visual C++ 6.0, add the required files, and enter the following code into

your .cpp source file.

The following program example is available on the PSG Family Documentation CD-ROM as

visaex1.cpp.

//****************************************************************************************

// PROGRAM NAME:visaex1.cpp

// PROGRAM DESCRIPTION:This example program verifies that the GPIB connections and

// and interface are functional.

// Turn signal generator power off then on and then run the progam

//****************************************************************************************

#include <visa.h>

#include <stdio.h>

#include "StdAfx.h"

#include <stdlib.h>

void main ()

{

ViSession defaultRM, vi; // Declares a variable of type ViSession

// for instrument communication

ViStatus viStatus = 0;

// Opens a session to the GPIB device

// at address 19

viStatus=viOpenDefaultRM(&defaultRM);

viStatus=viOpen(defaultRM, "GPIB::19::INSTR", VI_NULL, VI_NULL, &vi);

if(viStatus){

printf("Could not open ViSession!\n");

printf("Check instruments and connections\n");

printf("\n");

exit(0);}

viPrintf(vi, "*RST\n"); // initializes signal generator

// prints to the output window

printf("The signal generator should now be in REMOTE. The remote

indicator\n");

printf("annunciator R should appear on the signal generator display\n");

printf("\n");

viClose(vi); // closes session

viClose(defaultRM); // closes default session

}

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