Agilent Technologies E2094S Podręcznik Użytkownika Pobierz pdf (Strona 72)

72 Agilent VISA User’s Guide

3 Programming with VISA

handler must be installed and exception events

enabled on all sessions where the exception

handler is used.*/

#include <stdio.h>

#include <visa.h>

ViStatus __stdcall myExceptionHandler (

ViSession vi,

ViEventType eventType,

ViEvent context,

ViAddr usrHandle

) {

ViStatus exceptionErrNbr;

char nameBuffer[256];

ViString functionName = nameBuffer;

char errStrBuffer[256];

/* Get the error value from the exception

context */

viGetAttribute( context, VI_ATTR_STATUS,

&exceptionErrNbr );

/* Get the function name from the exception

context */

viGetAttribute( context, VI_ATTR_OPER_NAME,

functionName );

errStrBuffer[0] = 0;

viStatusDesc( vi, exceptionErrNbr,

errStrBuffer );

printf("ERROR: Exception Handler reports\n"

"(%s)\n","VISA function '%s' failed with

error 0x%lx\n", "functionName,

exceptionErrNbr, errStrBuffer );

return VI_SUCCESS;

}

void main(){

ViStatus status;

ViSession drm;

ViSession vi;

ViAddr myUserHandle = 0;

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Agilent Technologies E2094S Podręcznik Użytkownika Strona 72