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Building a VISA Application in Windows 2
Agilent VISA User’s Guide 23
If the program does not run, see the Event Viewer for a list of
run- time errors. The source file idn.bas follows.
Option Explicit
''''''''''''''''''''''''''''''''''''''''''''''''
'''''''''''''''''''
' idn.bas
' This example program queries a GPIB device for
' an identification string and prints the
' results. Note that you may have to change the
' VISA Interface Name and address for your
' device from "GPIB0" and "22",respectively.
''''''''''''''''''''''''''''''''''''''''''''''''
'''''''''''''''''''
Sub Main()
Dim defrm As Long 'Session to Default
Resource Manager
Dim vi As Long 'Session to instrument
Dim strRes As String * 200 'Fixed length
string to hold results
' Open the default resource manager session
Call viOpenDefaultRM(defrm)
' Open the session to the resource
' The "GPIB0" parameter is the VISA Interface
' name to a
' GPIB instrument as defined in
' Connection Expert.
' Change this name to what you have defined
' for your VISA Interface.
' "GPIB0::22::INSTR" is the address string
' for the device.
' this address will be the same as seen in:
' Connection Expert)
- Agilent VISA User’s Guide 1
- 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 20
- Numeric Arrays 20
- Steps to Running the Program 21
- Sample Program Source Code 22
- Sample Program Contents 24
- Agilent VISA User’s Guide 25 25
- Logging Error Messages 26
- 28 Agilent VISA User’s Guide 28
- Programming with VISA 29
- VISA Resources and Attributes 30
- VISA Attributes 31
- 3 Programming with VISA 32
- Using Sessions 33
- Opening a Session 34
- Addressing a Session 36
- Sample: Opening a Session 39
- Closing a Session 40
- Searching for Resources 40
- Sending I/O Commands 43
- Formatted I/O Conversion 45
- Using Non-Formatted I/O 54
- Using Events and Handlers 57
- Programming with VISA 3 59
- Agilent VISA User’s Guide 59 59
- Agilent VISA User’s Guide 61 61
- Agilent VISA User’s Guide 63 63
- Using the Callback Method 65
- Sample: Trigger Callback 69
- Sample: SRQ Callback 71
- Using the Queuing Method 74
- Enabling Events 75
- Sample: Wait on Event for SRQ 77
- Sample: Trigger Event Queuing 77
- Trapping Errors 80
- Sample: Printing Error Code 81
- Exception Events 82
- Using Locks 87
- VISA Lock Types 88
- Sample: Exclusive Lock 89
- Programming via GPIB and VXI 93
- General Interface Information 94
- GPIB Interfaces Overview 95
- 82350 GPIB Card #1 96
- Windows PC 96
- GPIB InstrumentsGPIB Cable 96
- 82350 GPIB Card #2 96
- VXI Interfaces Overview 98
- GPIB-VXI Interfaces Overview 99
- GPIB-VXI (E1406A) Interfaces 100
- Programming the Registers 102
- Using viIn and viOut 103
- Using viMoveIn and viMoveOut 104
- Functions 106
- Mapping Memory Space 109
- Sample: Using viPeek16 110
- Unmapping Memory Space 111
- Using Low-Level viPeek/viPoke 115
- Using High-Level viIn/viOut 116
- Sample: Using VXI Memory I/O 117
- Memory I/O Services 121
- MEMACC Attribute Descriptions 124
- Agilent VISA User’s Guide 125 125
- VI_ATTR_WIN_ACCESS Settings 128
- Setting the VXI Trigger Line 129
- Programming via LAN 131
- 5 Programming via LAN 132
- Client/Server Model 133
- Gateway Operation 133
- Programming via USB 141
- USB Interfaces Overview 142
- Value Description Data Type 143
- 6 Programming via USB 144
- ViFind32 156
- VISA address 156
- VISA alias 156
- 158 Agilent VISA User’s Guide 158
- Agilent VISA User’s Guide 159 159
- 160 Agilent VISA User’s Guide 160
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