Logic Analyzer API: Is it possible to put a UInt16 value in a Byte Array?

[Lesiastas]

Greetings! I'm currently working on a project involving the use of the Analog Discovery 2's Logic Analyzer. I was tasked to created a VB6 Wrapper to replicate the functions of the Logic Analyzer WaveForms GUI. I'm not very knowledgeable in coding so I was wondering how to translate this python variable from the DigitalIn_Acquisition sample code into its VB6 equivalent:

Here's the VB6 code that I made:

Again, I'm very sorry, but I'm still a novice at coding. Though I understand that you can't insert a UShort value in a 1-Dimensional Byte Array, I can't think of a way to declare it in order to agree with the Byte Array Data Type. 

Any advice guys? 

[attila]

Hi @Lesiastas

You could change the declaration in the wrapper to UInt16:

<DllImport("dwf.dll", EntryPoint:="FDwfDigitalInStatusData", CallingConvention:=CallingConvention.Cdecl)>
  Function FDwfDigitalInStatusData(ByVal hdwf As Integer, <MarshalAs(UnmanagedType.LPArray)> rgData() As UInt16, ByVal countOfDataBytes As Integer) As Integer
  End Function

And use as:

Dim samples = 1000
Dim rgwData(samples) As UInt16
FDwfDigitalInStatusData(hdwf, rgwData, 2 * samples)

 

[jpeyron]

Hi @Lesiastas,

I moved your thread to a section where more experience Waveforms/AD2 engineers look. Also here is a forum thread that should be helpful for you.

best regards,

Jon

[Lesiastas]

Thanks @jpeyron and @attila. I did not know that you can change the declaration in the wrapper because my supervisor told me not to touch anything in there. I'll try to implement this and see if it'll work. Thanks again you guys and God Bless