Experimental Physics and
Industrial Control System

There is a slightly newer released version of lvPortDriver release last September that would be better to start with, as some bugs were fixed.

You should be able to build lvPortdriver as any other shared app, it requires epics base, asyn, and the labview header files.  The LabVIEW header files should be in the cintools subdirectory directory of your LabVIEW installation e.g. C:\Program Files (x86)\National Instuments\LabVIEW 2016\cintools  if you put those header files somewhere where lvPortDriver can find them (set the directory in your RELEASE file) then you should be able to build it.

Then you’ll want to build the IOC and include lvPortDriver.  Since I don’t usually build on the cRIO, I prefer to configure epics base for a static build, but either should work.  With a dynamic build all the shared libraries included with the IOC will have to be on the cRIO, and LabVIEW will just say error loading library if any of them are not found.

If you install the VIP file included with lvPortdriver (on your LabVIEW development machine) you can run the IOC using the VI that’s installed (page 6 of the talk you referenced).

Inside this vi is a Call Library Function Node, that runs the callmain function in the lvtest shared library (if you build your own IOC you’ll have to add this function, so that there is an externally callable function for the shared library instead of the main function of the IOC.

It also sounds like you may be having problems with running shared libraries from LabVIEW on Linux RT.  What I usually do is install the shared libraries in /usr/local/lib on the cRIO and then run ldconfig so that the cRIO will use the library.  ldconfig ?p can be used to verify the list of shared libraries that are loaded.

If you build everything statically, you can just name the IOC’s shared library liblvPortDriver.so and that’s the only shared library you need, or you can have multiple shared libraries.

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Correspondence

Scott Baily

AOT-IC, MS H820

Los Alamos National Laboratory

Los Alamos, NM 87545

ph: (505) 606-2260

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Best Regards,

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赵泽锋 (Zefeng Zhao)

Institute of Applied Electromagnetic Engineering，

SEEE, Huazhong University of Science and Technology

Luoyu Road 1037#, Wuhan 430074, China

Email: [email protected] 

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