VISA Template Attributes
This topic summarizes the interface that each VISA implementation must incorporate.
VISA Template Attributes
|
Symbolic Name |
Access Privilege |
|
|
|
|
||
|
RO |
Global |
ViVersion |
0h to FFFFFFFFh |
Resource version that uniquely identifies each of the different revisions or implementations of a resource. |
N/A
|
||
|
RO |
Global |
ViAccessMode |
VI_NO_LOCK |
The current locking state of the resource. The resource can be unlocked, locked with an exclusive lock, or locked with a shared lock. |
VI_NO_LOCK
|
||
|
RO |
Global |
ViUInt16 |
0h to 3FFFh |
A value that corresponds to the VXI manufacturer ID of the manufacturer that created the implementation. |
N/A
|
||
|
RO |
Global |
ViString |
N/A |
A string that corresponds to the VXI manufacturer name of the manufacturer that created the implementation. |
N/A
|
||
|
RO |
Global |
ViRsrc |
N/A |
The unique identifier for a resource. |
N/A
|
||
|
RO |
Global |
ViVersion |
00500000h |
Resource version that uniquely identifies the version of the VISA specification to which the implementation is compliant. |
00500000h
|
||
|
RO |
Local |
ViSession |
N/A |
Specifies the session of the Resource Manager that was used to open this session. |
N/A
|
||
|
R/W* |
Local |
ViUInt32 |
1h to FFFFFFFFh |
Specifies the maximum number of events that can be queued at any time on the given session. |
50
|
||
|
RO |
Global |
ViString |
N/A |
Specifies the resource class (for example, “INSTR”). |
N/A
|
||
|
R/W |
Local |
ViAddr |
** |
Data used privately by the application for a particular session. This data is not used by VISA for any purposes and is provided to the application for its own use. |
|||
|
R/W |
Local |
ViUInt32 |
0h to FFFFFFFFh
|
Data used privately by the application for a particular session. This data is not used by VISA for any purposes and is provided to the application for its own use. |
|||
|
R/W |
Local |
ViUInt64 |
0h to FFFFFFFFFFFFFFFFh
|
Data used privately by the application for a particular session. This data is not used by VISA for any purposes and is provided to the application for its own use. |
|||
* This attribute becomes RO once viEnableEvent has been called for the first time.
** Specified in the relevant VPP-4.3.x framework document.
*** The value of this attribute is a fixed value that reflects the version of the VISA specification to which the implementation is compliant. This value will change with subsequent versions of the specification.
**** Defined only for frameworks that are 64-bit native.
VISA Template Operations
viClose(vi)
viGetAttribute(vi, attribute, attrState)
viSetAttribute(vi, attribute, attrState)
viStatusDesc(vi, status, desc)
viTerminate(vi, degree, jobId)
viLock(vi, lockType, timeout, requestedKey, accessKey)
viUnlock(vi)
viEnableEvent(vi, eventType, mechanism, context)
viDisableEvent(vi, eventType, mechanism)
viDiscardEvents(vi, eventType, mechanism)
viWaitOnEvent(vi, inEventType, timeout, outEventType, outContext)
viInstallHandler(vi, eventType, handler, userHandle)
viUninstallHandler(vi, eventType, handler, userHandle)