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Found 6 results

  1. Hello, I need a little help. I want to send from LabVIEW to Arduino via serial port the string for example "ABC" and so on. The problem is that when I send the string from LabVIEW .......the Arduino do nothing. Sometimes shows some kind of sign. When I send the string via Visual Studio it works perfectly. Is there someone who can help me. I attached picture of vi and Arduino code Thank you very much. Arduino code.txt
  2. I've got a 3rd party DLL I call from within my application. One of the functions returns a pointer to a variable length null terminated string. I use the mysterious GetValueByPointer.xnode to dereference the string and return it's value. This works great from within the Labview development environment. I'm using 2013Sp1. But when I compile the application into an executable, the xnode returns an error 7. It appears the DLL is returning a valid pointer, but the xnode can't dereference it. My hunch is that the pointer is crossing some kind of protected boundary, but I don't know for su
  3. Good morning, I have a DLL I created (in Labview) that takes in string information, does some magic crunching on it to create a password that is passed out as a string. This DLL will be called from CVI and probably from a C# application. This should be so simple, however I cannot figure out how to pass the string in and get the modified string out of my DLL. I've had no luck at all getting this DLL to work by trying many different things. It crashes LV, returns and error, or simply passes nothing out during my trials. I've included the project (its small) in zipped forma
  4. As far as I now there is 2 way to define how to format a numeric into a string using the floating point representation (%f): - Setting the number of significant digits (%_2f) - Setting the number of digits or precision (%.2f) However I often find myself in the need of a way to define the width of the string. For example I always want 3 digits maximum. Using significant digits won't work if the number is 0.0012 since this only has 2 significant digits, so the string will be 0.0012 even though I would like to see 0.00 (so 0 if we hide trailing zeros). On the other hand, using digits
  5. I am able to read HEX file into Labview using read from Text file..I am getting data into labview in terms of string. Problem => Now i want to load this HEX file into microcontroller using VISA-rs232 .Is it require to further conversion or i can load HEX file(in form of string) directly into microcontroller ? rs232.vi
  6. Hello guys! Is it possible to parse and evaluate a boolean expression stored in a string with standard LV VIs? I can't find anything.. Expression like this one: 1==2 && (2!=5 || 2 > 5) I'm building a configuration xml-file with if-attributes for conditions: <item name="xyz" if="{namespace:variable} == 3" /> The first step is replacing the variables within {} with actual values. This is the easy part. The hard part is to evaluate the results...
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