The function parameters from a non sequential fashon

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• Call the function QML from C++ (simple question)

  I guess that's a pretty easy question but I'm a bit new apart from development c ++ of BB10. I have a QML file in the assets folder called Functions.qml which has only onne inside functions.

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  My question is, before you minimize the app How can I call the function printStat() of the qml file? I have always developed my apps in QML so never had to deal with c ++. Should be easy enough to call a function well.

  Thank you in advance!

  first step is to find the object by ObjectName using findChild, usually from your element root (navigationPane).
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• Pass the parameter to the functions called from a dll

  Hi all

  I am interfacing a motor controller for PMC - 100 through the Protocol of Performax using labwindows.

  I need to explicitly link the PerformaxCom.dll and call functions with him. I'm calling this function

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  Faithful:

  If you want to link explicitly, you can consult this article: http://zone.ni.com/devzone/cda/tut/p/id/8503

  It has a code snippet that shows passing two parameters to a DLL function.

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• Compiled VI do not keep the environmental parameters from code development

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• Call the function in LabView from a DLL, and then access the global variable of DLL

  I've created a DLL in LabWindows with a function and structure.  I want to call the function from LabView and then access the overall structure.  I am able to call the function in the DLL with a "call library function node" and has access to the return value, but I can't understand how to access the overall structure.  The structure is declared in the header DLL with __declspec (dllimport) struct parameters file.

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  My guess is that you need two bytes of padding after "in_out" and another to two bytes of padding after "anin."  The reason being that ints are 4 bytes, and most of them C compilers will align on 4-byte boundaries.  The struct will naturally start to such a limit (in fact, in Windows, it will probably start to an 8 byte boundary).  If you then count bytes in your structure, you are 70 byte after "in_out."  70 is not divisible by 4, so you need 2 bytes more to reach the next 4 byte boundary.  You can also you could reorganize your struct so that "anin" follows "in_out" and this is probably the best option if it won't cause you other problems.

  Unlike most C compilers, LabVIEW compressed structures as closely as possible, without filling.  I don't know enough about the history of LabVIEW and internal parts to explain the reasons and to do this performance penalty, but, as choice of LabVIEW "endianness", it is probably a remnant of the first versions of LabVIEW that were running on the Mac.

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  We are currently updating some old software written in LabVIEW 6.0.3 to Java. One of the features of the original software is to create data files using the function "Write Datalog" and also remind these databases later using 'Read Datalog'.  To maintain backward compatibility with old data users, we want that new software to also be able to read and display the old datalogs.  I have read several posts here about how the only way to get data off datalogs uses the function 'Reading Datalog' of the same version of LabVIEW to write the paper in the first place. I have the original LabVIEW code so I don't know the structure of the data that has been written.

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  I guess that is not a built-in library capable of reading files datalog LabVIEW simply because they do not have a fixed format... Even in LV, you will need to pass the data structure for the opening function in order to be able to read the data back.

  Searching the forum I found this discussion that can give you useful to begin with.

  Apparently, you need detect the beginning of the section of the data file after the initials "DTLG" and rest of the header (which is the part not documented). After this point, read the file should be simple if you know the data structure the program writer used. The data > storage section of LabVIEW help can give you information about the content of the memory of each type of data used.

  A simple test, I did write the clusters with a string and an integer shows that: 1. section of data begins at offset 0x22F; 2. the cluster is poured into the file preceded an int with the length of the string; 3. documents may have a variable length according to the length of the string; 4. There are no bytes of padding between elements of the cluster; 5. records are packed in the file consecutively.

  I did this test using LabVIEW2009: it is possible that older files of LV are structured differently.

  An alternative to this is to generate a DLL in LabVIEW that reads files datalog and passes their content to the appellant. Since you are experienced in LV, you are certainly more comfortable than me by doing this.

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