Agilent Technologies FS2010 Guida Utente Scaricare il pdf (Pagina 75)

Programming with VISA 3

Agilent VISA User’s Guide 75

If the specified event has occurred, the event information is

retrieved and the program returns immediately. If the

specified event has not occurred, the program suspends

execution until a specified event occurs or until the specified

timeout period is reached.

Sample: Using the Queuing Method

This sample program shows one way you can use the

queuing method.

main();

ViSession vi;

ViEventType eventType;

ViEvent event;

viEnableEvent(vi, VI_EVENT_SERVICE_REQ,

VI_QUEUE, VI_NULL);

viWaitOnEvent(vi, VI_EVENT_SERVICE_REQ,

VI_TMO_INFINITE, &eventType, &event);

viClose(event);

viDisableEvent(vi, VI_EVENT_SERVICE_REQ,

VI_QUEUE);

}

Enabling Events

Before an event can be delivered, it must be enabled using

the viEnableEvent function:

viEnableEvent(vi, eventType, mechanism,

context);

These parameters are defined as follows:

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Agilent Technologies FS2010 Guida Utente Pagina 75