form1.vb

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Public Class Form1
    Inherits System.Windows.Forms.Form

#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call

    End Sub

    'Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents TextBox3 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox4 As System.Windows.Forms.TextBox
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents TextBox5 As System.Windows.Forms.TextBox
    Friend WithEvents Label5 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Button1 = New System.Windows.Forms.Button
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.Button2 = New System.Windows.Forms.Button
        Me.Label1 = New System.Windows.Forms.Label
        Me.TextBox2 = New System.Windows.Forms.TextBox
        Me.Label2 = New System.Windows.Forms.Label
        Me.Label3 = New System.Windows.Forms.Label
        Me.TextBox3 = New System.Windows.Forms.TextBox
        Me.TextBox4 = New System.Windows.Forms.TextBox
        Me.Label4 = New System.Windows.Forms.Label
        Me.TextBox5 = New System.Windows.Forms.TextBox
        Me.Label5 = New System.Windows.Forms.Label
        Me.SuspendLayout()
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(328, 16)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(128, 32)
        Me.Button1.TabIndex = 0
        Me.Button1.Text = "Click here to run"
        '
        'TextBox1
        '
        Me.TextBox1.BackColor = System.Drawing.SystemColors.InactiveCaptionText
        Me.TextBox1.Enabled = False
        Me.TextBox1.Location = New System.Drawing.Point(152, 40)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(144, 20)
        Me.TextBox1.TabIndex = 1
        Me.TextBox1.Text = ""
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(320, 352)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(128, 32)
        Me.Button2.TabIndex = 2
        Me.Button2.Text = "Exit"
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(16, 40)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(112, 16)
        Me.Label1.TabIndex = 3
        Me.Label1.Text = "Number of Devices"
        Me.Label1.TextAlign = System.Drawing.ContentAlignment.MiddleLeft
        '
        'TextBox2
        '
        Me.TextBox2.BackColor = System.Drawing.SystemColors.InactiveCaptionText
        Me.TextBox2.Enabled = False
        Me.TextBox2.Location = New System.Drawing.Point(152, 80)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.Size = New System.Drawing.Size(144, 20)
        Me.TextBox2.TabIndex = 4
        Me.TextBox2.Text = ""
        '
        'Label2
        '
        Me.Label2.Location = New System.Drawing.Point(16, 80)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(136, 23)
        Me.Label2.TabIndex = 5
        Me.Label2.Text = "Serial Number of Device 0"
        '
        'Label3
        '
        Me.Label3.Location = New System.Drawing.Point(16, 120)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(128, 23)
        Me.Label3.TabIndex = 6
        Me.Label3.Text = "Description of Device 0"
        '
        'TextBox3
        '
        Me.TextBox3.BackColor = System.Drawing.SystemColors.InactiveCaptionText
        Me.TextBox3.Enabled = False
        Me.TextBox3.Location = New System.Drawing.Point(152, 112)
        Me.TextBox3.Name = "TextBox3"
        Me.TextBox3.Size = New System.Drawing.Size(144, 20)
        Me.TextBox3.TabIndex = 7
        Me.TextBox3.Text = ""
        '
        'TextBox4
        '
        Me.TextBox4.Location = New System.Drawing.Point(152, 200)
        Me.TextBox4.Name = "TextBox4"
        Me.TextBox4.Size = New System.Drawing.Size(144, 20)
        Me.TextBox4.TabIndex = 8
        Me.TextBox4.Text = ""
        '
        'Label4
        '
        Me.Label4.Location = New System.Drawing.Point(16, 200)
        Me.Label4.Name = "Label4"
        Me.Label4.TabIndex = 9
        Me.Label4.Text = "String to Write"
        '
        'TextBox5
        '
        Me.TextBox5.BackColor = System.Drawing.SystemColors.InactiveCaptionText
        Me.TextBox5.Enabled = False
        Me.TextBox5.Location = New System.Drawing.Point(152, 280)
        Me.TextBox5.Name = "TextBox5"
        Me.TextBox5.Size = New System.Drawing.Size(144, 20)
        Me.TextBox5.TabIndex = 10
        Me.TextBox5.Text = ""
        '
        'Label5
        '
        Me.Label5.Location = New System.Drawing.Point(16, 280)
        Me.Label5.Name = "Label5"
        Me.Label5.Size = New System.Drawing.Size(80, 16)
        Me.Label5.TabIndex = 11
        Me.Label5.Text = "String Read"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(472, 405)
        Me.Controls.Add(Me.Label5)
        Me.Controls.Add(Me.TextBox5)
        Me.Controls.Add(Me.Label4)
        Me.Controls.Add(Me.TextBox4)
        Me.Controls.Add(Me.TextBox3)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.TextBox2)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.Button1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)

    End Sub

#End Region

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

        Dim DeviceCount As Integer
        Dim DeviceIndex As Integer
        Dim TempDevString As String
        Dim BytesWritten As Integer
        Dim TempStringData As String
        Dim BytesRead As Integer


        ' Get the number of device attached
        FT_Status = FT_GetNumberOfDevices(DeviceCount, vbNullChar, FT_LIST_NUMBER_ONLY)
        If FT_Status <> FT_OK Then
            Exit Sub
        End If
        ' Display device count on form
        TextBox1.Text = DeviceCount.ToString


        ' Get serial number of device with index 0
        ' Allocate space for string variable
        TempDevString = Space(16)
        FT_Status = FT_GetDeviceString(DeviceIndex, TempDevString, FT_LIST_BY_INDEX Or FT_OPEN_BY_SERIAL_NUMBER)
        If FT_Status <> FT_OK Then
            Exit Sub
        End If
        FT_Serial_Number = Microsoft.VisualBasic.Left(TempDevString, InStr(1, TempDevString, vbNullChar) - 1)
        ' Display serial number on form
        TextBox2.Text = FT_Serial_Number


        ' Get description of device with index 0
        ' Allocate space for string variable
        TempDevString = Space(64)
        FT_Status = FT_GetDeviceString(DeviceIndex, TempDevString, FT_LIST_BY_INDEX Or FT_OPEN_BY_DESCRIPTION)
        If FT_Status <> FT_OK Then
            Exit Sub
        End If
        FT_Description = Microsoft.VisualBasic.Left(TempDevString, InStr(1, TempDevString, vbNullChar) - 1)
        ' Display serial number on form
        TextBox3.Text = FT_Description


        'Open device by serial number
        FT_Status = FT_OpenByDescription(FT_Description, 2, FT_Handle)
        If FT_Status <> FT_OK Then
            MsgBox("Failed to open device.", , )
            Exit Sub
        End If


        ' Reset device
        FT_Status = FT_ResetDevice(FT_Handle)
        If FT_Status <> FT_OK Then
            Exit Sub
        End If


        ' Purge buffers
        FT_Status = FT_Purge(FT_Handle, FT_PURGE_RX Or FT_PURGE_TX)
        If FT_Status <> FT_OK Then
            Exit Sub
        End If


        ' Set Baud Rate
        FT_Status = FT_SetBaudRate(FT_Handle, 115200)
        If FT_Status <> FT_OK Then
            Exit Sub
        End If


        ' Set parameters
        FT_Status = FT_SetDataCharacteristics(FT_Handle, FT_DATA_BITS_8, FT_STOP_BITS_1, FT_PARITY_NONE)
        If FT_Status <> FT_OK Then
            Exit Sub
        End If


        ' Set Flow Control
        FT_Status = FT_SetFlowControl(FT_Handle, FT_FLOW_RTS_CTS, 0, 0)
        If FT_Status <> FT_OK Then
            Exit Sub
        End If


        ' Set RTS
        FT_Status = FT_SetRts(FT_Handle)
        If FT_Status <> FT_OK Then
            Exit Sub
        End If


        ' Set DTR
        FT_Status = FT_SetDtr(FT_Handle)
        If FT_Status <> FT_OK Then
            Exit Sub
        End If


        ' Write string data to device
        FT_Status = FT_Write_String(FT_Handle, TextBox4.Text, Len(TextBox4.Text), BytesWritten)
        If FT_Status <> FT_OK Then
            Exit Sub
        End If


        ' Wait
        Sleep(100)


        ' Get number of bytes waiting to be read
        FT_Status = FT_GetQueueStatus(FT_Handle, FT_RxQ_Bytes)
        If FT_Status <> FT_OK Then
            Exit Sub
        End If


        ' Read number of bytes waiting
        ' Allocate string to recieve data
        TempStringData = Space(FT_RxQ_Bytes + 1)
        FT_Status = FT_Read_String(FT_Handle, TempStringData, FT_RxQ_Bytes, BytesRead)
        If FT_Status <> FT_OK Then
            Exit Sub
        End If
        ' Display string on form
        TextBox5.Text = Trim(TempStringData)


        ' Close device
        FT_Status = FT_Close(FT_Handle)
        If FT_Status <> FT_OK Then
            Exit Sub
        End If



    End Sub

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

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        MsgBox("Connect an FTDI device with D2XX drivers." & Chr(13) & Chr(10) & "Connect a loop-back connector to write and read data through the device.", , )

    End Sub
End Class