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| Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'si le port com est déjà ouvert on le ferme
If SerialPort1.IsOpen = True Then
SerialPort1.Close()
End If
'ouverture du port com
Try
SerialPort1.Open()
Catch ex As Exception
MessageBox.Show("Impossible d'ouvrir le port ")
End Try
End Sub
Private Sub Reception_Trame(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived
Dim strTmp As String = ""
Try
If SerialPort1.ReadBufferSize > 0 Then
'Recupere les donnees
strTmp = SerialPort1.ReadExisting
'Vide le buffer
SerialPort1.DiscardInBuffer()
myRxData(strTmp)
End If
Catch ex As Exception
MsgBox("Erreur durant la réception" & vbCrLf & vbCrLf & ex.ToString)
End Try
End Sub
Private Sub myRxData(ByVal mydata As Integer)
Dim ascChar As String
CheckForIllegalCrossThreadCalls = False
'format des données du port 1
ascChar = CChar(ChrW(mydata))
TextBox1.Text &= ascChar
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
'données écrites sur le port 1
SerialPort1.Write(TextBox2.Text & vbCrLf)
End Sub
End Class |
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