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Debugging DLL-Based IVI Drivers from LabVIEWUsing LabWindows/CVI

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You can develop Interchangeable Virtual Instruments (IVI) instrument drivers in LabWindows/CVI and create an interface to run the IVI drivers in LabVIEW, but debugging such a driver from withi

LabVIEW can be difficult. Complete the following steps to debug DLL-based IVI drivers from LabVIEW using LabWindows/CVI. To complete these steps, you must have LabVIEW and CVIinstalled.

Make a backup copy of the released DLL, which is in the VXI plug & play ( ) directory.VXIpnp\WinXX\Bin

Create a project that contains the following file types: and ..c, .fp, .h, .sub

Open the file in LabWindows/CVI..fp

Select .OptionsCreate DLL Project

Save the project. Click when prompted if you want to load a DLL project.Yes

If you do not have a debug build of the DLL, you must make one. Otherwise, continue to step 8.

Select . In the Debug configuratio n, LabWindows/CVI uses the current Debugging Level to determine how much debugging information to generate for theBuildConfigurationDebug

debug executable or DLL. In the Release configuration, LabWindows/CVI does not generate any debugging information into the executable or DLL.

Because LabVIEW looks for a DLL in the directory, select and use the arrows to navigate to directory in the list, asVXIpnp BuildTarget Settings VXIplug&play Where to copy DLL:

shown in the following illustratio n. Click .OK

Select to launch LabVIEW.RunSpecify External Process

Click the button, navigate to , which is usually located in , and click the button.Browse labview.exe c:\Program Files\National Instruments\LabVIEW OK

Select . You should receive the following message.BuildCreate Debuggable Dynamic Link Library

Open file. Select . The line icon area appears to the left of the source code. Click the line icon area next to a line in your source code (for example, in thea .c ViewLine Icons

InitWithOptions function) to create a breakpoint.

Click to launch LabVIEW.Run

Open and run a VI you want to debug.

The program breaks when program execution reaches the line with the breakpoint.

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: Oct 31, 2008Publish Date

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