Chapter 2 61
Programming Examples
GPIB Programming Examples
#include "StdAfx.h"
#include "windows.h"
#include <conio.h>
#define MAX_CNT 1024
int sweep=1; // End of sweeep flag
/* Prototypes */
ViStatus _VI_FUNCH interupt(ViSession vi, ViEventType eventType, ViEvent event, ViAddr
addr);
int main ()
{
ViSession defaultRM, vi;// Declares variables of type ViSession
// for instrument communication
ViStatus viStatus = 0;// Declares a variable of type ViStatus
// for GPIB verifications
char rdBuffer[MAX_CNT];// Declare a block of memory data
viStatus=viOpenDefaultRM(&defaultRM);// Initialize VISA session
if(viStatus < VI_SUCCESS){// If problems, then prompt user
printf("ERROR initializing VISA... exiting\n");
printf("\n");
return -1;}
// Open session to gpib device at address 19
viStatus=viOpen(defaultRM, "GPIB::19::INSTR", VI_NULL, VI_NULL, &vi);
if(viStatus){ // If problems then prompt user
printf("ERROR: Could not open communication with
instrument\n");
printf("\n");
return -1;}
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