National Instruments 320682C Chapter 4 GPIB/GPIB-488.2 Library

Contents
© National Instruments Corporation ix LabWindows/CVI Standard Libraries
ToPolar1D........................................................................................................3-33
ToRect..............................................................................................................3-34
ToRect1D.........................................................................................................3-35
Transpose .........................................................................................................3-36
Error Conditions...........................................................................................................3-37
Chapter 4
GPIB/GPIB-488.2 Library ...........................................................................................4-1
GPIB Library Function Overview................................................................................4-1
GPIB Functions Library Function Panels........................................................ 4-1
GPIB Library Concepts................................................................................................4-5
GPIB Libraries and the GPIB Dynamic Link Library/Device Driver..............4-5
Guidelines and Restrictions for Using the GPIB Libraries..............................4-6
Device and Board Functions............................................................................4-7
Automatic Serial Polling..................................................................................4-7
Autopolling Compatibility...................................................................4-8
Hardware Interrupts and Autopolling...............................................................4-8
Read and Write Termination............................................................................4-9
Timeouts...........................................................................................................4-9
Global Variables for the GPIB Library............................................................4-10
Different Levels of Functionality Depending on Platform and GPIB Board...4-10
Windows 95..........................................................................................4-10
Native 32-Bit Driver.................................................................4-10
Compatibility Driver................................................................4-11
Windows NT........................................................................................4-11
Limitations on Transfer Size............................................................................4-11
Multithreading..................................................................................................4-11
Notification of SRQ and Other GPIB Events...................................................4-12
Synchronous Callbacks........................................................................4-12
Asynchronous Callbacks......................................................................4-12
Driver Version Requirements...............................................................4-12
GPIB Function Reference ............................................................................................4-13
CloseDev..........................................................................................................4-13
CloseInstrDevs.................................................................................................4-14
ibInstallCallback...............................................................................................4-14
SRQI, RQS, and Auto Serial Polling...................................................4-16
CallbackFunction .................................................................................4-17
ibNotify............................................................................................................ 4-17
eventMask............................................................................................ 4-18
SRQI, RQS, and Auto Serial Polling...................................................4-19
CallbackFunction .................................................................................4-19
Restrictions on Operations in Asynchronous Callbacks......................4-20
OpenDev...........................................................................................................4-21
ThreadIbcnt...................................................................................................... 4-22
ThreadIbcntl.....................................................................................................4-22