Agilent Technologies FS2010 Podręcznik Użytkownika Pobierz pdf (Strona 72)

72 Agilent VISA User’s Guide

3 Programming with VISA

This program is installed on your system in the

ProgrammingSamples subdirectory. See the IO Libraries

Suite Online Help for locations of sample programs.

/* srqhdlr.c

This example program illustrates installing an

event handler to be called when an SRQ interrupt

occurs. Note that you may need to change the

address. */

#include <visa.h>

#include <stdio.h>

#if defined (_WIN32)

#include <windows.h> /* for Sleep() */

#define YIELD Sleep( 10 )

#elif defined (_WINDOWS)

#include <io.h> /* for _wyield */

#define YIELD _wyield()

#else

#include <unistd.h>

#define YIELD sleep (1)

#endif

int srqOccurred;

/* trigger event handler */

ViStatus _VI_FUNCH mySrqHdlr(ViSession vi,

ViEventType

eventType, ViEvent ctx, ViAddr userHdlr){

ViUInt16 statusByte;

/* make sure it is an SRQ event */

if(eventType!=VI_EVENT_SERVICE_REQ){

/* Stray event, so ignore */

printf( "\nStray event of type 0x%lx\n",

eventType );

return VI_SUCCESS;

}

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Agilent Technologies FS2010 Podręcznik Użytkownika Strona 72