Adjust Gain in scripting mode using C/C++ API

[GVR123]

Hi Guys

Does anyone know how I can adjust the gain of an arbitrary waveform when using scripting mode in the C/C++ API?

I've found the relevant functions for Arbitrary Sequence mode and Standard Function mode, but not for scripting mode.

That is:

• NIFGEN_VAL_OUTPUT_FUNC has functions niFgen_ConfigureStandardWaveform and niFgen_ConfigureAmplitude each taking amplitude as an argument
• NIFGEN_VAL_OUTPUT_SEQ has niFgen_ConfigureArbSequence which takes gain as an argument
• NIFGEN_VAL_OUTPUT_SCRIPT has no such function?

As far as I can gather its necessary to use niFgen_WriteNamedWaveformF64 in order to refer to that waveform in the script by name, but the function itself has no gain/amplitude argument and it does not return a handle to the function such that I could use niFgen_ConfigureArbWaveform.

I can accomplish this in a Labview VI by writing the 'arbitrary waveform - gain' property using the niFGen Property Node, so I assume its must be possible in the C API

Any pointers in the right direction would be appreciated.

Thanks

Greg

[Tom9390]

Hi Greg,

You could create a dll from your LabVIEW code and call it from you C++ code. Is there any reason why you are not just using LabVIEW?

[GVR123]

Hi Tom

I was looking at the possiblility of modifying the script programmatically and thought it might be easier in C, no other reason. I just found it curious that something that can be accomplished in Labview can't (as far as I can tell) be accomplished in C, especially considering I assume Labview just calls the same C functions behind the scenes...

Greg