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10:57 am
June 5, 2015
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Development environment:
Windows 7 SP1; LabVIEW 2014 SP1; Arduino IDE V1.6.9; Compiler V1.0.0.21; Arduino DUE Board
This compiler does not support FGV(Functional Global Variable)? I use the serial test with FGV.vi, found no response. Examples are as follows：
11:45 am
June 5, 2015
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Now I can only use global variables instead of FGV：
8:31 pm
March 12, 2015
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That is correct, unfortunately you cannot use an uninitialized shift register in a subVI making an FGV non-functional. The reason why is the way subVIs and memory optimization is handled by the Compiler. SubVI variables are handled like C function local variables meaning they are automatic duration variables (refer to the Important Considerations section of the user manual). Automatic duration variables are stored on the stack and are released when the subVI returns to preserve memory usage. But as you noticed, you can replace with a global variable to force the Compiler to allocate the memory for that variable statically.
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