Export code from Excel 2003 to VB 2008

**petro** · Sep 9 '09, 09:35 AM

more info:

That code works fine in Vb6 too
There are some differences i dont know VBA Excel/Vb6 Vs VB2008

**tlhintoq** · Sep 9 '09, 10:49 PM

I have some trouble to export this code which works fine to VB 2008
This code is intented to work with datalogger.

Could you be a little more specific about the problem(s)? "Some trouble" is very vague.

**petro** · Sep 10 '09, 06:39 AM

Hello
Declarations's module updated based on difference between vb6 and vb2008

Code:

Module Module1
    Declare Function pl1000OpenUnit Lib "pl1000.dll" (ByRef handle As Short) As Integer
    Declare Function pl1000CloseUnit Lib "pl1000.dll" (ByRef handle As Short) As Integer
    Declare Function pl1000GetUnitInfo Lib "pl1000.dll" (ByRef handle As Short, ByVal S As String, ByVal lth As Short, ByRef requiredSize As Short, ByVal info As Short) As Short
    Declare Function pl1000SetTrigger Lib "pl1000.dll" (ByRef handle As Short, ByVal enabled As Short, ByVal enable_auto As Short, ByVal auto_ms As Short, ByVal channel As Short, ByVal dir As Short, ByVal threshold As Short, ByVal hysterisis As Short, ByVal delay As Single) As Short

Declare Function pl1000SetInterval Lib "pl1000.dll" (ByRef handle As Short, ByRef us_for_block As Integer, ByVal ideal_no_of_samples As Integer, ByVal channels As Short, ByVal No_of_channels As Short) As Integer

    Declare Function pl1000GetValues Lib "pl1000.dll" (ByRef handle As Short, ByVal values As Short, ByVal no_of_values As Integer, ByVal overflow As Short, ByVal triggerIndex As Integer) As Integer
    Declare Function pl1000Run Lib "pl1000.dll" (ByRef handle As Short, ByVal no_of_values As Integer, ByVal method As Short) As Short
    Declare Function pl1000Ready Lib "pl1000.dll" (ByVal handle As Short, ByRef ready As Short) As Integer
    Declare Function pl1000MaxValue Lib "pl1000.dll" (ByVal handle As Short, ByRef maxValue As Short) As Integer
End Module

FORM1:

Code:

Public Class Form1
 Dim status As Integer
    Dim handled As Short
    Dim opened As Short
    Dim values(200) As Short
    Dim channels(22) As Short
    Dim nValues As Integer
    Dim ok As Short
    Private ready As Short
    Dim requiredSize As Short
   
    Dim s As String     'in VB6 it was string*255
    Public port As Short
    Public product As Short
    Dim maxValue As Short
    Dim Slenght As String

 Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        ' Open device
        status = pl1000OpenUnit(handled)
        opened = handled <> 0


        If opened Then

            status = pl1000MaxValue(handled, maxValue)

            ' Slenght = pl1000GetUnitInfo(handled, s, 255, requiredSize, 3)

            Call pl1000SetTrigger(handled, False, 0, 0, 0, 0, 0, 0, 0)
            nValues = 100
            channels(0) = 1
            channels(1) = 2

            Dim sampleInterval As Integer
            Dim us_for_block As Integer

            us_for_block = 1000000
            status = pl1000SetInterval(handled, us_for_block, nValues, channels(0), 2)

            status = pl1000Run(handled, nValues, 0)


            ready = 0
            Do While ready = 0
                status = pl1000Ready(handled, ready)
            Loop

            MsgBox("ok")
        End If
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        pl1000CloseUnit(handled)

    End Sub
End Class

The problem is this :
At position

Code:

            ready = 0
            Do While ready = 0
                status = pl1000Ready(handled, ready)
            Loop

The var "ready" is always 0 (zero) so the loop is forever.
This is wrong because the hardware works fine and the program works fine in vb/excel 2003 too.
I dont know why it is always 0.
This software comes with datalogger which works perfectly

Follows the program for vb6/excel 2003:
This woks fine in excel 2003/VB 6

Code:

Declare Function pl1000OpenUnit Lib "pl1000.dll" (ByRef handle As Integer) As Long
Declare Function pl1000CloseUnit Lib "pl1000.dll" (ByVal handle As Integer) As Long
Declare Function pl1000GetUnitInfo Lib "pl1000.dll" (ByVal handle As Integer, ByVal S As String, ByVal lth As Integer, ByRef requiredSize As Integer, ByVal info As Integer) As Integer
Declare Function pl1000SetTrigger Lib "pl1000.dll" (ByVal handle As Integer, ByVal enabled As Integer, ByVal enable_auto As Integer, ByVal auto_ms As Integer, ByVal channel As Integer, ByVal dir As Integer, ByVal threshold As Integer, ByVal hysterisis As Integer, ByVal delay As Single) As Integer

This declarations must be changed in "Byval" otherwhise i get an "Accessviolation exceptions.."
[I]Declare Function pl1000SetInterval Lib "pl1000.dll" (ByVal handle As Integer, ByRef us_for_block As Long, ByVal ideal_no_of_samples As Long, channels As Integer, ByVal No_of_channels As Integer) As Long[/I]

Declare Function pl1000GetValues Lib "pl1000.dll" (ByVal handle As Integer, values As Integer, no_of_values As Long, overflow As Integer, triggerIndex As Long) As Long
Declare Function pl1000Run Lib "pl1000.dll" (ByVal handle As Integer, ByVal no_of_values As Long, ByVal method As Integer) As Integer
Declare Function pl1000Ready Lib "pl1000.dll" (ByVal handle As Integer, ByRef ready As Integer) As Long
Declare Function pl1000MaxValue Lib "pl1000.dll" (ByVal handle As Integer, ByRef maxValue As Integer) As Long

Dim status As Long
Dim handle As Integer
Dim values(200) As Integer
Dim channels(22) As Integer
Dim nValues As Long
Dim ok As Integer
Dim ready As Integer
Dim requiredSize As Integer
Dim S As String * 255
Public port As Integer
Public product As Integer
Dim maxValue As Integer

Function adc_to_mv(value As Integer) As Integer
  adc_to_mv = value / maxValue * 2500
End Function

Sub GetPl1000()

' Open device
    status = pl1000OpenUnit(handle)
    opened = handle <> 0
    
If opened Then

  'Get the maximum ADC value for this variant
  status = pl1000MaxValue(handle, maxValue)

' Get the unit information
  Cells(6, "E").value = "Unit opened"
  SLegnth = pl1000GetUnitInfo(handle, S, 255, requiredSize, 3)
  Cells(7, "E").value = S
  SLegnth = pl1000GetUnitInfo(handle, S, 255, requiredSize, 4)
  Cells(8, "E").value = S
  SLegnth = pl1000GetUnitInfo(handle, S, 255, requiredSize, 1)
  Cells(9, "E").value = S
  
  ' No Trigger
  Call pl1000SetTrigger(handle, False, 0, 0, 0, 0, 0, 0, 0)

  ' Say that we want to take 100 readings in 1 s
  ' from channels 1 and 2
    nValues = 100
    channels(0) = 1
    channels(1) = 2
    Dim sampleInterval As Long
    Dim us_for_block As Long
    
    us_for_block = 1000000
    status = pl1000SetInterval(handle, us_for_block, nValues, channels(0), 2)
        
    status = pl1000Run(handle, nValues, 0)
    
    ready = 0
    Do While ready = 0
        status = pl1000Ready(handle, ready)
    Loop

  ' Get a block of 100 readings...
  ' we can call this routine repeatedly
  ' to get more blocks with the same settings
  Dim triggerIndex As Long
  Dim overflow As Integer
  status = pl1000GetValues(handle, values(0), nValues, overflow, triggerIndex)
  
  ' Copy the data into the spreadsheet
  For i = 0 To nValues - 1
     Cells(i + 4, "A").value = adc_to_mv(values(2 * i))
     Cells(i + 4, "B").value = adc_to_mv(values(2 * i + 1))
  Next i

  ' Close the unit when finished to drop the driver
  Call pl1000CloseUnit(handle)
  
Else
  Cells(17, "E").value = "Unable to open unit"
End If
  
End Sub

Thank for any tips or help

**tlhintoq** · Sep 10 '09, 08:00 AM

The problem is this :
At position

Code:

            ready = 0
            Do While ready = 0
                status = pl1000Ready(handled, ready)
            Loop

The var "ready" is always 0 (zero) so the loop is forever.

Well... You set ready to zero, you then passed it to another method. But I see no place where you are trying to get that value back. I wouldn't have expected it to change value. Maybe I'm missing something.

When you pass a value as a parameter the receiving method receives into a new variable. A copy of the value you send, if you will.

I would expect you need to do something with the 'status' variable since this is returning results from the method you are calling (pl1000Ready)

Export code from Excel 2003 to VB 2008

Export code from Excel 2003 to VB 2008

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