NI-VISA3.2Mac OS X 美国国家仪器虚拟仪器软件架构VISA3.2 苹果版下载

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NI-VISA3.2Mac OS X 美国国家仪器虚拟仪器软件架构VISA3.2 苹果版下载

NI-VISA为使用GPIB、串行、PXI和其他类型仪器的用户提供支持。
NI-VISA是一个NI仪器驱动程序，是虚拟仪器软件架构(VISA) I/O标准的具体实现。虚拟仪器软件架构(VISA)这一标准用于配置和编程基于GPIB、VXI、PXI、串口(RS232/485)、以太网/LXI和/或USB接口的仪器系统以及故障分析。NI-VISA包括实用程序、底层控制功能和范例，可帮助您快速创建应用程序。

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VISA3.2M.txt (616 Bytes, 下载次数: 0, 售价: 10 元)

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VISA320M

National Instruments NI-VISA(TM) Software for Mac OS X. Version 3.2.
Copyright(c) 1995, 2004 National Instruments Corporation. All rights reserved.

NATIONAL INSTRUMENTS HOLDS MULTIPLE COPYRIGHTS, TRADEMARKS, AND PATENTS
FOR THIS PRODUCT.  BY DOWNLOADING AND/OR INSTALLING THIS PRODUCT, YOU
AGREE TO THE TERMS OF THE license.txt FILE THAT RESIDES IN THE SAME DIRECTORY
AS THIS readme.txt FILE ON THE CD AND/OR WEB SITE.  FOR PATENTS COVERING
NATIONAL INSTRUMENTS PRODUCTS, REFER TO THE patents.txt FILE ON THE ROOT
DIRECTORY OF YOUR CD (IF APPLICABLE) AND/OR www.ni.com/patents.


CONTENTS OF THIS FILE
---------------------
VISA Support for Multiple GPIB-VXI Controllers
Installed Files and Paths
VISA Probes for LabVIEW 7.x
NI-VISA 3.0 Improvements and Bug Fixes
NI-VISA 3.1 Improvements and Bug Fixes
NI-VISA 3.2 Improvements and Bug Fixes
Credits
Known Issues


VISA SUPPORT FOR MULTIPLE GPIB-VXI CONTROLLERS
----------------------------------------------
NI-VISA supports multiple GPIB-VXI controllers in a single system. Because
the National Instruments GPIB-VXI controller ships with a primary address
of 1, NI-VISA automatically searches for any GPIB-VXI controllers at that
address.

If you have changed the primary address (for example, if you added a second
GPIB-VXI controller to your system, and set the address of the second
controller to 9), or if you have a GPIB-VXI controller from another vendor,
then you need to use the VISA configuration utility so NI-VISA can find it.
This app's path is /Applications/National Instruments/NIvisa/VisaConfig.
While in the Resource Editor, click the 'Add' button to add a new resource.
Specify a valid resource name for the new controller, such as
GPIB-VXI2::0::INSTR.  You will then be prompted for the GPIB board number
and the GPIB-VXI's primary and secondary addresses. For most users, the only
number that will change (from the default selections) is the primary address
(for the above example, you would change it to 9).  Click 'OK' to add this
new resource, and then select the File>>Save menu option to save this to the
NI-VISA database.

If you are using a GPIB-VXI command module from another vendor, you also
need to obtain and install that vendor's VISA GPIB-VXI component.

If you have a GPIB device at primary address 1 and that device does not
recognize "*IDN?", you should disable the GPIB-VXI auto-detect feature in
VisaConfig on the Settings tab.


INSTALLED FILES AND PATHS
-------------------------
There are three main locations where NI-VISA installs files.

The local "/Library/Frameworks" folder contains the VISA.framework folder.
This folder contains all needed headers, and supporting Passport libraries
that NI-VISA uses.

In the local "/Applications/National Instruments" folder, there is an
NIvisa folder.  Included here are the user and programmer manuals, as well
as several groups of C examples using NI-VISA.

This NIvisa folder also includes a graphical utility named VisaConfig to
configure VISA options.

Finally, the "/Library/Preferences" folder contains an NIvisa folder with
INI files.  These files are used for NI-VISA settings and status codes.


VISA PROBES FOR LABVIEW 7.x
---------------------------
The VISA probes for LabVIEW 7.x greatly extend the amount of relevant
information displayed when using LabVIEW probes on VISA refnums. They are used
automatically by LabVIEW in place of the generic probe when they are
installed.

To install them, download them from "ftp.ni.com/support/visa/labview/probes/"
and copy them into "/vi.lib/_probes/default/VISA/" where
is the installation directory of LabVIEW.


NI-VISA 3.0 IMPROVEMENTS AND BUG FIXES
--------------------------------------
When you open a VISA session to GPIB0::INTFC and immediately query the
attribute VI_ATTR_GPIB_SRQ_STATE, it previously returned the value
VI_STATE_UNASSERTED.  It now returns VI_STATE_UNKNOWN because the SRQ line
cannot be monitored if the interface is not yet CIC.  The correct state is
returned after calling viGpibSendIFC.

For a TCPIP INSTR resource, calling viTerminate did not work correctly.

For a TCPIP INSTR resource, calling viRead or viWrite with a large buffer
occasionally would return an error without transmitting the entire buffer.

For a TCPIP INSTR resource, opening and closing sessions to multiple host
addresses would cause NI-VISA to crash.

For a TCPIP INSTR resource, calling viLock with a timeout longer than the
I/O timeout for that session could cause NI-VISA to return VI_ERROR_TMO.

For a TCPIP SOCKET resource, viReadAsync was not implemented.  Now it is.

For a Serial INSTR resource, viOpen will now open a port if the process
that had been using that port exited ungracefully (such as with Ctrl-C).
The previous behavior had been that viOpen would return VI_ERROR_RSRC_BUSY.

For a Serial INSTR resource, if you enabled RTS/CTS flow control and then
manually tried to set the state of the RTS line, some operating systems
would generate VI_ERROR_NSUP_ATTR while others would return VI_SUCCESS but
not actually modify the state of the line.  Neither of these behaviours was
correct.  Now NI-VISA will return VI_ERROR_INV_SETUP in this case on all
operating systems.

For a Serial INSTR resource, if a binding existed to a valid file/device
but that file/device was not really a serial port, then NI-VISA would
not close the handle.  Repeated calls to viFindRsrc or viOpen would cause
the process to eventually run out of file handles.  This has been fixed.

If you had a GPIB device at primary address 1 that generated a response to
*IDN? that was longer than 100 characters, viFindRsrc would occasionally
crash.  This has been fixed.

viFindRsrc would crash on a complex expression with multiple "|" symbols.
This has been fixed.

viScanf %# modifier will now output the number of characters put into the
buffer excluding the terminating null character.  This applies to the %#s,
%#t, %#T, and %#[] modifiers. NI-VISA treats the maximum array size
(specified on input) as the total buffer size including the terminating null
character.

Calling viFindRsrc repeatedly when logged in as root would eventually run
out of file descriptors.  This has been fixed.

The attributes VI_ATTR_MANF_NAME and VI_ATTR_MODEL_NAME are now correctly
implemented for GPIB-VXI regardless of whether NI-VXI is installed.

The maximum simultaneous number of GPIB-VXI controllers supported by
NI-VISA has changed from 10 to 32.

For a Serial INSTR resource, the internal modem is now correctly detected.

For a Serial INSTR resource, during a viFindRsrc, when a previously found
serial port was detected again, the scan would not proceed to find any
new serial ports.  This has been fixed.

For a Serial INSTR resource, a call to viOpen when the corresponding
serial port did not exist returned VI_ERROR_SYSTEM_ERROR.  This return
value has been corrected to VI_ERROR_RSRC_NFOUND.

When calling viWaitOnEvent repeatedly with a timeout of 0 (immediate), some
interfaces and event types would still consume excessive CPU time.  Now doing
this will yield the CPU regardless of the interface or event type.

For a GPIB resource, the operations viWriteAsync and viReadAsync did not
support true asynchronous operations.  The data would still transmit and
receive, but NI-VISA did it synchronously.  This has been fixed.

viFindRsrc would return VI_ERROR_INV_EXPR if the expression exceeded 255
characters.  Now it will accept resource expressions of any length.

Calling viFindRsrc would always assert REN on each GPIB board after finding
devices.  Now viFindRsrc will re-assert REN on each board only if there is
at least 1 open VISA INSTR session on that board.

For a TCPIP SOCKET resource, using viRead with termchar enabled was much
slower than reading the exact number of bytes.  The performance of using
termchar with viRead is now much better than it was.

Calling viFindRsrc would return serial ports even if they were explicitly
disabled in the configuration file.


NI-VISA 3.1 IMPROVEMENTS AND BUG FIXES
--------------------------------------
Reading data from a Serial port was slow.  The performance has improved.

Using the Serial Break VI from LabVIEW did not work with remote NI-VISA.
This has been fixed.

For a Serial INSTR resource, if a parity or framing error occurred, NI-VISA
would not return the correct error condition.  This has been fixed.

In the VisaConfig application, using the "Browse" button in the Enet-Serial
dialog would not work.  This has been fixed.

Calling viOpen on a remote NI-VISA resource did not honor the openTimeout
parameter.  This has been fixed.

Calling viFindRsrc on a remote system would cause LabVIEW to later crash
when you exit.  This has been fixed.

Calling viClose on an ethernet resource would leak a socket handle.  This
has been fixed.

The global attributes on a GPIB INTFC resource were not properly shared
across sessions.  This has been fixed.

Using the system call "fork" on a process with VISA loaded would sometimes
cause the forked process to hang.  This has been fixed.


NI-VISA 3.2 IMPROVEMENTS AND BUG FIXES
--------------------------------------
Added complete support for USB (both RAW and INSTR).

Calling viPrintf on a remote VISA session would return VI_ERROR_IO instead
of VI_ERROR_RSRC_LOCKED when the remote resource was locked.  This is fixed.


CREDITS
-------
This product includes components that use the socket++ library.  The library
is Copyright(C) 1992-1995 Greg Lavender (University of Texas) and
Gnanasekaran Swaminathan (University of Virginia).  All rights reserved.


KNOWN ISSUES
------------
Note that the NI-488.2 2.0 driver only supports the GPIB-ENET, so in turn,
NI-VISA also only supports the GPIB-ENET.

Callbacks for any event on a GPIB INTFC session might not work unless
you make a call to the VISA driver.  For more information see the
Interrupt Callback Handler page in the section "NI-VISA Platform-Specific
and Portability Issues" of the NI-VISA Help.