Assistance Required with VB.net

[gadelhas]

Hi;

I think i can help, however you need to be more clear about your issue.
I I'll put here some code,

VB2008 Net Code;
First you need to add the serilport class to your project.

Public Class Form1
    Dim WithEvents SerialPort1 As New IO.Ports.SerialPort

Then, at Form Load, you need to configure and open your SerialPort;

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

        SerialPort1.PortName = "COM1"
        SerialPort1.Parity = IO.Ports.Parity.None
        SerialPort1.BaudRate = 19200
        SerialPort1.DataBits = 8
        SerialPort1.StopBits = 1
        SerialPort1.Open()
        SerialPort1.Write(Chr(13) & "Hugo Oliveira" & Chr(13))
    End Sub

This handles the recetion from the buffer of the com port, and then i have a If statment to do the actions that need to be perfomed acording with the received data.

    Private Sub DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived
        Dim recepcao As String

        recepcao = SerialPort1.ReadExisting

        If recepcao = "%TE" Then
            GetCursorPos(rect)
            SetCursorPos(rect.X - 1, rect.Y)
        ElseIf recepcao = "%TD" Then
            GetCursorPos(rect)
            SetCursorPos(rect.X + 1, rect.Y)
        ElseIf recepcao = "%TC" Then
            GetCursorPos(rect)
            SetCursorPos(rect.X, rect.Y - 1)
        ElseIf recepcao = "%TB" Then
            GetCursorPos(rect)
            SetCursorPos(rect.X, rect.Y + 1)
        ElseIf recepcao = "%TE1" Then
            GetCursorPos(rect)
            SetCursorPos(rect.X - 10, rect.Y)
        ElseIf recepcao = "%TD1" Then
            GetCursorPos(rect)
            SetCursorPos(rect.X + 10, rect.Y)
        ElseIf recepcao = "%TC1" Then
            GetCursorPos(rect)
            SetCursorPos(rect.X, rect.Y - 10)
        ElseIf recepcao = "%TB1" Then
            GetCursorPos(rect)
            SetCursorPos(rect.X, rect.Y + 10)
        ElseIf recepcao = "%TE2" Then
            GetCursorPos(rect)
            SetCursorPos(rect.X - 20, rect.Y)
        ElseIf recepcao = "%TD2" Then
            GetCursorPos(rect)
            SetCursorPos(rect.X + 20, rect.Y)
        ElseIf recepcao = "%TC2" Then
            GetCursorPos(rect)
            SetCursorPos(rect.X, rect.Y - 20)
        ElseIf recepcao = "%TB2" Then
            GetCursorPos(rect)
            SetCursorPos(rect.X, rect.Y + 20)
        End If
    End Sub

With this piece of code in VB, you must with 100% sure, receive data from Com Port.

Where is a part of code, from sendinf the data out of the pic, in PBP. I use the Debug command, but you can use Hserout, if you are using te Uart of the PIC, or Serout, Serout2 command.

Main:
if JX>70 and JX<=100 then
   DEBUG "%TE"
   pause 20
  endif
  
   if JX>0 and JX<=70 then
   DEBUG "%TE1"
   pause 20 
  endif 
  
  if Jx>180 and Jx<210 then
   DEBUG "%TD"
   pause 20
  endif 
  
  if Jx>=210 then
   DEBUG "%TD1"
   pause 20
  endif
'                             JoyStick Eixo Y
' ====================================================================  
  if JY>70 and JY<=100 then
   DEBUG "%TB"
   pause 20 
  endif
  
  if JY>0 and JY<=70 then
   DEBUG "%TB1"
   pause 20 
  endif  
  
  if Jy>180 and Jy<210 then
   DEBUG "%TC" 
   pause 20
  endif
  
  if Jy>=210 then
   DEBUG "%TC1" 
   pause 20
  endif    
'                             Axis -  Eixo X
' ====================================================================
  if Ax<100 then
   DEBUG "%TE2"
   pause 20 
  endif
  
 if Ax>140 then
   DEBUG "%TD2" 
   pause 20
  endif
'                             Axis -  Eixo Y
' ====================================================================  
  if Ay<110 then
   DEBUG "%TB2" 
   pause 20
  endif
  
  if Ay>140 then
   DEBUG "%TC2" 
   pause 20
  endif
'                             Botões
' ====================================================================    
  IF BE = 0 then
   DEBUG "%RL1" 
   pause 80
  endif

  IF BD = 0 then
   DEBUG "%RD1" 
   pause 80
  endif    
goto Main

Hope it can hep.

[sayzer]

Here are two additions from me:

ComboBox1.Items.AddRange(SerialPort1.GetPortNames())

This way, you can get the available comports (port list) from your PC hardware directly into a combo box.

Then,

SerialPort1.PortName = ComboBox1.SelectedItem

This way, you can select a com port (if there is one).

Try all of these operations in try/catch so that if a comport is not available, you can prompt a message to the user.
Also, if there is comport but not selected in combobox, you can also catch it and prompt to the user.


----------------

[malc-c]

Guys, thanks for the assistance, I'll have a play when I get home from work

Much appreciate

[LEDave]

Hi,

I'm trying to send data from PIC - PC using the program mackrackit pointed to earlier in this thread.

http://www.rentron.com/receiving_data.htm

When I compile it I have this error message: Name 'comEvReceive' is not declared.

Does anyone have an idea of a fix (with as much of an explaination as you can spare please, I'm new to this). I've done lots of Googling with various answer from 'Select Case' to it can't be done in the 2008 VB-Version.

 Private Sub MSComm1_OnComm()
Dim sData As String ' Holds our incoming data
Dim lHighByte As Long   ' Holds HighByte value
Dim lLowByte As Long    ' Holds LowByte value
Dim lWord As Long       ' Holds the Word result

' If comEvReceive Event then get data and display
If MSComm1.CommEvent = comEvReceive Then

    sData = MSComm1.Input ' Get data (2 bytes)
    lHighByte = Asc(Mid$(sData, 1, 1)) ' get 1st byte
    lLowByte = Asc(Mid$(sData, 2, 1))  ' Get 2nd byte
    
    ' Combine bytes into a word
    lWord = (lHighByte * &H100) Or lLowByte
    
    ' Convert value to a string and display
    lblRCTime.Caption = CStr(lWord)
    
End If
End Sub

I guess I should add I'm using Visual Basic 2008 Express Edition.

Any help much appreciated.

Dave

[gadelhas]

Hi,

I guess I should add I'm using Visual Basic 2008 Express Edition.

Dave

Hi,

The code posted is VB6 and you are using VB2008.
Try the code in the post 9, of this thread!

[LEDave]

Here's my attempt to modify the code from gadelhas's post above. My FORM has two push buttons, one opens the COM1 PORT the other closes it. I can't get it to show any data in the ListBox1 though from the PIC. The PIC code (shown below) outputs a RANDOM BYTE.

Any Ideas? Anyone?

Public Class Form1
    Dim WithEvents SerialPort1 As New IO.Ports.SerialPort
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        SerialPort1.PortName = "COM1"
        SerialPort1.Parity = IO.Ports.Parity.None
        SerialPort1.BaudRate = 2400
        SerialPort1.DataBits = 8
        SerialPort1.StopBits = 1
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If SerialPort1.IsOpen = False Then SerialPort1.Open()
        If SerialPort1.IsOpen = True Then MsgBox("com1 port opened sucessfully")
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        If SerialPort1.IsOpen = True Then SerialPort1.Close()
        If SerialPort1.IsOpen = False Then MsgBox("com1 port closed sucessfully")

    End Sub

    Private Sub DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived
        Dim recepcao As String

        recepcao = SerialPort1.ReadExisting



    End Sub


    Private Sub ListBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListBox1.SelectedIndexChanged
        SerialPort1.Write(ListBox1.Text)

PIC code:

A VAR WORD
X VAR WORD
Y VAR WORD
Z VAR BYTE

main:
Random A
Y = A * 100
X = DIV32 25700
LET Z = X

SEROUT2 PORTC.3, 16780, [DEC z, 10, 13]
pause 4000
GOTO MAIN

[LEDave]

Here's another program which does receive the same data from the PIC. Only it displays it vertically instead of in BYTES across the ListBox. Anyone know how to modify this to display the BYTES properly?

This is how the data appears in the ListBox v's the serial Communicator which displays them properly.

VB has the numbers
1
3
5
*
*
2
0
3
*
And Serial Communicator has them
135
203

Here's the program, this maybe the one to adapt / work on as it's nearly there:

Imports System
Imports System.ComponentModel
Imports System.Threading
Imports System.Windows.Forms


Public Class Form1


    'Buffer for receievd data***

    Private Delegate Sub AddListBoxItemInvoker(ByVal item As Object)


    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        SerialPort1.PortName = "COM1"
        SerialPort1.Parity = IO.Ports.Parity.None
        SerialPort1.BaudRate = 2400
        SerialPort1.DataBits = 8
        SerialPort1.StopBits = 1

    End Sub

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

        If SerialPort1.IsOpen = False Then SerialPort1.Open()
        If SerialPort1.IsOpen = True Then MsgBox("com1 port opened sucessfully")

    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        If SerialPort1.IsOpen = True Then SerialPort1.Close()

        If SerialPort1.IsOpen = False Then MsgBox("com1 port closed sucessfully")

    End Sub

    

    Private Sub SerialPort1_DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived

        Me.AddListBoxItem(SerialPort1.ReadExisting)


    End Sub

    Private Sub AddListBoxItem(ByVal item As Object)

        If Me.ListBox1.InvokeRequired Then
            'We are on a secondary thread so delegation is required.
            Me.ListBox1.Invoke(New AddListBoxItemInvoker(AddressOf AddListBoxItem), (item))

        Else
            'We are on the primary thread so add the item.
            Me.ListBox1.Items.Add(item)
        End If
    End Sub
End Class

Thanks for any help.

Dave