Agilent Technologies E2094S Guia do Utilizador descarregar pdf (Página 127)

127

Agilent IO Libraries Suite

Agilent VISA User’s Guide

Agilent Technologies

Programming via USB

This chapter provides guidelines for VISA programming of USB

instruments that conform to USBTMC (Universal Serial Bus Test and

Measurement Class) and/or USBTMC-USB488 (Universal Serial Bus

Test and Measurement Class, Subclass USB488 Specification).

The chapter contents are:

• USB Interfaces Overview

• Communicating with a USB Instrument Using VISA

1 2 ... 122 123 124 125 126 127 128 129 130 131 132 ... 145 146

Agilent VISA 1
User’s Guide for IO 1
Libraries Suite 15.5 1
Agilent VISA User’s Guide 3
4 Agilent VISA User’s Guide 4
Agilent VISA User’s Guide 5 5
6 Agilent VISA User’s Guide 6
Introduction 7
What’s in This Guide? 8
VISA Overview 9
VISA Support 10
VISA Documentation 10
Introduction 1 11
Agilent VISA User’s Guide 11 11
Contacting Agilent 12
Agilent Technologies 13
Linking to VISA Libraries 14
Sample VISA Program (C/C++) 15
C/C++ Sample Program Contents 17
Format Conversion Commands 19
Numeric Arrays 19
Steps to Running the Program 20
Sample Program Source Code 21
Sample Program Contents 23
24 Agilent VISA User’s Guide 24
Logging Error Messages 25
Programming with VISA 27
VISA Resources and Attributes 28
VISA Attributes 29
Using Sessions 30
Opening a Session 31
3 Programming with VISA 32
Addressing a Session 33
Programming with VISA 3 35
Agilent VISA User’s Guide 35 35
Closing a Session 37
Searching for Resources 37
Sending I/O Commands 40
Using Formatted I/O 41
Using Non-Formatted I/O 44
Using Events and Handlers 46
Events that can be Enabled 47
Agilent VISA User’s Guide 49 49
Agilent VISA User’s Guide 51 51
Agilent VISA User’s Guide 53 53
Using the Callback Method 54
Installing Handlers 55
Using the Queuing Method 62
Enabling Events 63
Trapping Errors 68
Exception Events 69
Using Locks 74
VISA Lock Types 75
General Interface Information 80
GPIB Interfaces Overview 81
82350 GPIB Card #1 82
Windows PC 82
GPIB InstrumentsGPIB Cable 82
82350 GPIB Card #2 82
Agilent VISA User’s Guide 83 83
VXI Interfaces Overview 84
GPIB-VXI Interfaces Overview 85
GPIB-VXI (E1406A) Interfaces 86
Programming the Registers 88
Using viIn and viOut 89
Using viMoveIn and viMoveOut 90
Functions 91
Mapping Memory Space 95
Sample: Using viPeek16 96
Using Low-Level viPeek/viPoke 100
Using High-Level viIn/viOut 101
Sample: Using VXI Memory I/O 102
Memory I/O Services 106
MEMACC Attribute Descriptions 109
VI_ATTR_WIN_ACCESS Settings 113
Setting the VXI Trigger Line 114
116 Agilent VISA User’s Guide 116
Programming via GPIB and VXI 116
Programming via LAN 117
Connection 118
Gateway Operation 119
5 Programming via LAN 120
Programming via USB 127
USB Interfaces Overview 128
6 Programming via USB 130
Glossary 131
Windows notification area 143
144 Agilent VISA User’s Guide 144
Agilent VISA User’s Guide 145 145
146 Agilent VISA User’s Guide 146

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