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Programming via GPIB and VXI 4
Agilent VISA User’s Guide 125
VXI and GPIB-VXI Specific MEMACC Attributes
The following attributes, most of which are read/write,
provide memory window control information.
Table 28 Attributes That Provide Memory Window Control Information
Attribute Description
VI_ATTR_VXI_LA Logical address of the local controller.
VI_ATTR_SRC_INCREMENT Used in viMoveInxx operation to specify
how much the source offset is to be
incremented after every transfer. The default
value is 1 and the viMoveInxx operation
moves from consecutive elements.
If this attribute is set to 0, the viMoveInxx
operation will always read from the same
element, essentially treating the source as a
FIFO register.
VI_ATTR_DEST_INCREMENT Used in viMoveOutxx operation to specify
how much the destination offset is to be
incremented after every transfer. The default
value is 1 and the viMoveOutxx operation
moves into consecutive elements.
If this attribute is set to 0, the viMoveOutxx
operation will always write to the same
element, essentially treating the destination
as a FIFO register.
VI_ATTR_WIN_ACCESS Specifies modes in which the current
window may be addressed: not currently
mapped, through the viPeekxx or viPokexx
operations only, or through operations
and/or by directly de-referencing the address
parameter as a pointer.
VI_ATTR_WIN_BASE_ADDR Base address of the interface bus to which
this window is mapped.
VI_ATTR_WIN_SIZE Size of the region mapped to this window.
- 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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