Building resource name?

Hi Gang,
It's been a frustrating day.
I'm building an application driver for the PCI-6021 in native C++. I'm using the DAQmx driver inside of it. It appears that the driver needs C-type strings (array of type constant character) for the "counter" specification.
All works well when I create the below and pass that to the function:
char My Counter[10] = "Dev1/ctr0";
But, I need to build the character array by casting and inserting integer variables for the device and counter numbers.
I can build strings that have the right text in them, but I haven't figured out how to cast that into a variable that will work with the command.
I know this is more of a C/C++ question, but I'll really appreciate all help.
Thanks,
Roger
Solved!
Go to Solution.

Hi,
That doesn't help me.
I've also been able to build a string, inserting a char literal, using the "strcat()" function. The problem is that the device number gets passed in as an integer (this driver must be compatible with existing software). I can implicitly cast that by this code:
int MyIntArg = 1;
char MyChar = MyIntArg;
Then replace the character:
MyCounter = "Devx/ctr0" ;
MyCounter[3] = Mychar;
This compiles without error, but the counter doesn't run. It only runs when character literals are used. So far, I haven't figured out what the issue is. When the function doesn't run, it returns -200220, which seems to be a type exception error.
I appreciate all help.
Roger

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My main application still isn't working, but now the small test ones are.
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Hi everyone,
I'm trying to get a SRS model SR720 LCR meter (manual on this page) working with LabView, connecting it to my PC with an Agilent 82357A GPIB/USB interface (manual on this page). I'm running MAX version 14.0, and NI-VISA version 14.0. I'm running LabView version 13.0f2, 32 bit.
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Old VISA Open in SR715/720 Initialize.vi->SR715/720 Getting Started.vi
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So, I went into the sub-VI Initialize.vi, and did that. Here is a picture of what the front panel and block diagram of the sub-VI Initialize2.vi (I changed the name in case I screwed things up, but I'm pretty sure the new one is the one being called by Getting Started.vi) looked like before I changed anything (you can see the Old VISA Open):
and here it is after replacing that with the regular VISA Open, deleting the instrument descriptor string and replacing it with a VISA resource, and connecting that to the VISA Open:
However, as you can see in the image above, and it seems like someone else had this problem in the 2nd thread linked above, I don't see my device listed in the drop-down menu (even if I refresh), only "LPT1" (I don't even know what that is):
No, I wasnt able to select the visa resource from the pull down menu. somehow it seems disabled or something.
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Go to Solution.

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