HP manual Familiarizing Yourself with the Driver, Examples

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To see the list of drivers registered with the IVI Foundation, go to

http://www.ivifoundation.org.

Familiarizing Yourself with the Driver

Although the examples in IVI Getting Started Guide use a DMM driver, you will likely employ a variety of IVI drivers to develop test programs. To jumpstart that task, you’ll want to familiarize yourself quickly with drivers you haven’t used before. Most ADEs provide a way to explore IVI drivers to learn their functionality. In each chapter, where applicable, we add a note explaining how to view the available functions. In addition, browsing an IVI driver’s help file often proves an excellent way to learn its functionality.

Examples

As we noted above, each example chapter in IVI Getting Started Guide shows you how to use an IVI driver to write and run a program that performs a simple measurement on a simulated instrument and returns the result. The examples demonstrate common steps using IVI drivers. Where practical, every example includes the steps listed below:

•Download and Install the IVI driver– covered in the Download and Install IVI Drivers section above.

•Determine the VISA address string – Examples in IVI Getting Started Guide use the simulate mode, so we chose the address string GPIB0::23::INSTR, often shown as GPIB::23. If you need to determine the VISA address string for your instrument and the ADE does not provide it automatically, use an IO application, such as National Instruments Measurement and Automation Explorer (MAX) or Agilent Connection Expert.

•Reference the driver or load driver files – For the examples in this guide, the driver is the Agilent 34401A IVI-COM Specific Driver, Version 1.1.0.11, March 2006 (from Agilent Technologies) or the Agilent 34401A IVI-C

Specific driver, Version 4.1, October 2006 (from National Instruments).

•Create an instance of the driver in ADEs that use COM – For the examples in this guide, the driver is the Agilent 34401A (IVI-COM) or HP 34401 (IVI-C).

•Write the program:

•Initialize the instrument – Initialize is required when using any IVI driver. Initialize establishes a communication link with the instrument and must be called before the program can do anything with the instrument. We set reset to true, ID query to false, and simulate to true.

Setting reset to true tells the driver to initially reset the instrument. Setting the ID query to false prevents the driver from verifying that the connected instrument is the one the driver was written for. Finally, setting simulate to true tells the driver that it should not attempt to connect to a physical instrument, but use a simulation of the instrument.

•Configure the instrument – We set a range of 1.5 volts and a resolution of 0.001 volts (1 millivolt).

Chapter 1

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Contents Getting Started Guide Page Contents Using IVI with Visual C# and Visual Basic .NET Using IVI with LabVIEWUsing IVI with LabWindows/CVI Using IVI with Paws Using IVI with MatlabUsing IVI with Measure Foundry Using IVI with Visual Basic 6.0 Using IVI with Agilent VEE ProAdvanced Topics Purpose Why Use an Instrument Driver?Chapter Introduction Why IVI? Class IVI Driver Why Use an IVI Driver? Shared Components Download and Install IVI DriversFlavors of IVI Drivers Familiarizing Yourself with the Driver ExamplesIntroduction Chapter Using IVI-COM in C++ Chapter Using IVI with Visual C++Download and Install the Driver EnvironmentCreate a New Project and Import the Driver Type Libraries \Program Files\Ivi\BinUsing IVI with Visual C++ Dmm-ConfigureIviDmmFunctionDCVolts, 1.5 Configure the InstrumentSet the Trigger Delay Dmm-Trigger-Delay =Close the Session Set the Reading Timeout/Display the ReadingError Checking Exit1 IAgilent34401Ptr dmmuuidofAgilent34401 try Using IVI-C in Visual C++Build and Run the Application $VXIPNPPATHWinNT\include \Program Files\IVI\Lib\msc\Program Files\IVI\include Chapter Goto Error else error = error #endif Define Error CheckingError = #ifndef checkErr #define checkErrfCallIf session Hp34401aClosesession Set the Trigger and Trigger DelayCheckErr hp34401aRead session, 1000, &reading Build and Run the Application Further Information Chapter Using IVI with Visual C# Visual Basic .NET Create a New Project and Reference the Driver Using Agilent.Agilent34401.Interop Create an Instance of the DriverType dmm.Initialize GPIB23, false, true, simulate=true Type double reading Dmm.DCVoltage.Configure1.5Dmm.Trigger.Delay = Dmm.CloseTips Agilent34401Class dmm = new Agilent34401ClassOption Explicit On Imports Agilent.Agilent34401.InteropConsole.WriteLineThe reading is 0, reading Console.ReadLine Chapter Chapter Using IVI with LabVIEWTM Using IVI-CCreate a Project and Access the Driver Using IVI with LabVIEW Take the Reading Run the Application Add Error CheckingDisplay the Reading Setting a Property in an IVI-C Driver Using IVI-COMUsing IVI with LabVIEW Initialize the Instrument Configure the Instrument Close the Driver and Automation Sessions Run the Application Chapter Chapter Using IVI with LabWindowsTM/CVITM Create a New Project and Add Instrument Driver Files#include hp34401a.h Using IVI with LabWindowsTM/CVITM Configure the Instrument Set the Reading Timeout GPIB023INSTR, Vifalse Printf %f, reading Chapter Chapter Using IVI with Matlab Development EnvironmentConfigure the IVI Driver TopicsUsing IVI with Matlab DMM in the Driver session field Create an Instance of the Instrument Configure and Control the InstrumentGenerate an Instrument Wrapper Connect to the InstrumentDisconnect from the Instrument Set Reading TimeoutDisplay Reading Remove the Driver from MemoryMatlab is a registered trademark of The MathWorks, Inc Chapter Chapter Using IVI with Measure Foundry Data Source Using IVI with Measure Foundry Control Source Using IVI with Measure Foundry Close Session Data SinkCompile and Run Using IVI with Measure Foundry Chapter Chapter Using IVI with Paws Prepare the Paws Environment VDC $ NOM 0 V UL 0.5 V LL -0.5CNX HI X20-2 LO Cnx hi DMM-Hi, lo DMM-LoAdd the Wcem Interface Functions Connect to the IVI-COM Driver #include DMM.h #include DMM.h Extern CComPtrIAgilent34401 driverExtern Hresult hr Variantfalse Varianttrue Hr = driver-getDCVoltage&pDMMDCVoltHr = pDMMTrig-ConfigureAgilent34401TriggerSourceImmediate Display\0333041m Bad return from Close method\033m\n Prepare the Run-Time System Environment IEEE-488 Bus Configuration File ChannelBuild the Project MLALoad and Run the Project Chapter Chapter Using IVI with Visual Basic Add a Button Option Explicit Dim dmm As New Agilent33401Type 1.5 Type dmm.Trigger.Delay = Type dmm.CloseTips Further Information Chapter Chapter Using IVI with Agilent VEE Pro Launch the Instrument Manager and Select the DriverChapter Using IVI with Agilent VEE Pro Initialize the Instrument Configure the Instrument Tips Another Method to Display the Reading Further Information Chapter Driver API Chapter Advanced TopicsIVI Architecture Driver Types Advanced Topics Instrument I/O InterchangeabilityAdvanced Topics IVI Configuration Store Advanced Topics Chapter IVI-COM IIviSessionFactory factory = new IviSessionFactoryClassConsole.WriteLineIdentifier 0, identifier Driver.InitializelogicalName, true, trueString identifier = driver.Identity.Identifier IIviDmm dmm = IIviDmmfactory.CreateDriverlogicalNameIVI-C IVI Drivers in Action Editing the Configuration StoreFuture Development Advanced Topics Chapter

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