Agilent Technologies FS2010 Guía de usuario descargar pdf (Pagina 18)

18 Agilent VISA User’s Guide

2 Building a VISA Application in Windows

viPrintf

and

viScanf

These are the VISA formatted I/O functions that are

patterned after those used in the C programming language.

The

viPrintf call sends the IEEE 488.2 *RST command to

the instrument and puts it in a known state. The viPrintf

call is used again to query for the device identification

(

*IDN?). The viScanf call is then used to read the results.

viClose

This function must be used to close each session. When

you close a device session, all data structures that had

been allocated for the session will be deallocated. When

you close the default manager session, all sessions opened

using that default manager session will be closed.

Table 2 Summary of VISA Function Calls Used in the C/C++ Sample

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 159 160

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Agilent Technologies FS2010 Guía de usuario Pagina 18