Assistance Required with VB.net

[tenaja]

I moved this thread to the "Off Topic" area.
As long as this discussion is about interfacing to a MCU I think it is "OK" to discuss VB here.

Are there limits to the "off topic" topics?

[malc-c]

I could understand if I was after help with writing a VB application to read a database or something equally obscure, but this is related to sending and receiving data to and from a PIC, or more importantly how to formulate VB code and PBP code so that the two work together.

Don, what you have mentioned has given me some idea as to what I need. If you have any links to those tutorials it would be appreciated

[mackrackit]

Are there limits to the "off topic" topics?

It has always been my understanding that the "Off Topic" area is for forum "things", electronics questions, and any other "thing" not specific to PB or PBP but in a round about way related to PB or PBP or the forum.

[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!