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calling C/C++ dll functions from DSS javascript

Robert Brown
Intellectual 610 points

I now have a nice setup to run test scripts using DSS with rhino javascript.  My problem is that I need to generate analog and digital inputs to my unit under test, and I need to monitor analog and digital outputs that the unit under test generates.  To this end, I have a National Instruments DAQ that communicates over a USB connection with the PC running DSS and rhino javascript.  What I now need is a way to integrate inputs and outputs associated with the NI-DAQ into my javascript test scripts.

The DAQ comes with a dll that has C functions to communicate with the DAQ.  My thought was to use SWIG <http://www.swig.org/Doc1.3/Java.html> to build a JNI interface to the DAQ dll, and then import the SWIGged functions into javascript where I could use them to operate the DAQ seamlessly right along with the rest of the DLL functionality.

My problem is I am not a java person.  I have used SWIG before with python and with perl, but using it with java is a bit different.  Another barrier is that while I have header files to interface to the DAQ dll, I do not have any other sources for the DAQ library; therefore, I cannot build a dll with the DAQ functions that also has the JNI to support the java interface.  Will I have to build a jar file for the JNI interface so rhino javascript can see it, or will javascript be able to see the dll directly since it is visable from within the java runtime?  Will I have to invoce System.loadLibrary("DAQ") from within my javascript to get the dll to load and become accessable, or must this be done from within the java environement?

Is this whole approach even feasible?  Has anyone done this before?

Thanks!

 

  • 0
    Guru 227245 points

    Robert Brown said:
    I now have a nice setup to run test scripts using DSS with rhino javascript.[...]

    Sounds nice, but I don't see any relation to the MSP430 microcontroller.

    This is the MSP430 microcontroller forum and it is rather unlikely (but of course not impossible) that you'll meet someone here who could help you.

  • 0 in reply to Jens-Michael Gross
    Intellectual 610 points

    Well, as should be obvious since I posted here, I am using the TI MSP430 processor.  Where should I post it? 

  • 0 in reply to Robert Brown
    Guru 227245 points

    Robert Brown said:
    Well, as should be obvious since I posted here

    You'd be surprised how many misleaded and unrelated posts show up in this forum. And nowhere in your post I can see any relation to the MSP processor.

    The question is about DLLs and Java and JavaScript etc.

    Unless there is a JavaScript or even Java VM for the MSP (which I really doubt), this rather sounds like a PC related question and I'd suggest asking in a Java forum, or maybe there is a SWIG forum?

    If you need to know how to program an MSP430s hardware UART to output or how to connect it to a COM port, then you're at the right place. But questions about 3rd party libraries for interfacing 4th party devices are a bit outside the scope of this forum.

  • 0
    TI__Guru 56650 points

    Hi,

    i think this question belongs to the Code Composer Studio forum, so i moved it here to let the question answered by a CCS expert.