RS232 auslesen mit VisualStudio2010-WindowsForms

[Andreas (Gast)]

Hallo zusammen,

Ich möchte gerne Daten anhand eines WindowsForms-Programm über den 
SerialPort auswerten. Bin leider ziemlich neu in diesem Bereich und 
benötige deshalb eure Hilfe. Wenn ich auf den Start-Button klicke, 
sollte die Schnittstelle die Daten im richTextBox1-Fenster anzeigen. 
Leider passiert gar nichts...

Hier mein bisheriger Code:

#pragma once

namespace Log_Programm {

  using namespace System;
  using namespace System::ComponentModel;
  using namespace System::Collections;
  using namespace System::Windows::Forms;
  using namespace System::Data;
  using namespace System::Drawing;

  /// <summary>
  /// Zusammenfassung für Seite
  /// </summary>
  public ref class Seite : public System::Windows::Forms::Form
  {
  public:
    Seite(void)
    {
      InitializeComponent();
      //
      //TODO: Konstruktorcode hier hinzufügen.
      //
    }

  protected:
    /// <summary>
    /// Verwendete Ressourcen bereinigen.
    /// </summary>
    ~Seite()
    {
      if (components)
      {
        delete components;
      }
    }
  private: System::Windows::Forms::RichTextBox^  richTextBox1;
  private: System::Windows::Forms::Button^  BEENDEN;
  public: System::IO::Ports::SerialPort^  serialPort1;
  private: System::Windows::Forms::Button^  START;
  public: 
  private: 

  private: System::ComponentModel::IContainer^  components;

  protected: 

  private:
    /// <summary>
    /// Erforderliche Designervariable.
    /// </summary>


#pragma region Windows Form Designer generated code
    /// <summary>
    /// Erforderliche Methode für die Designerunterstützung.
    /// Der Inhalt der Methode darf nicht mit dem Code-Editor geändert werden.
    /// </summary>
    void InitializeComponent(void)
    {
      this->components = (gcnew System::ComponentModel::Container());
      this->richTextBox1 = (gcnew System::Windows::Forms::RichTextBox());
      this->BEENDEN = (gcnew System::Windows::Forms::Button());
      this->serialPort1 = (gcnew System::IO::Ports::SerialPort(this->components));
      this->START = (gcnew System::Windows::Forms::Button());
      this->SuspendLayout();
      // 
      // richTextBox1
      // 
      this->richTextBox1->Anchor = static_cast<System::Windows::Forms::AnchorStyles>((((System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Bottom) 
        | System::Windows::Forms::AnchorStyles::Left) 
        | System::Windows::Forms::AnchorStyles::Right));
      this->richTextBox1->Location = System::Drawing::Point(12, 12);
      this->richTextBox1->Name = L"richTextBox1";
      this->richTextBox1->Size = System::Drawing::Size(625, 408);
      this->richTextBox1->TabIndex = 0;
      this->richTextBox1->Text = L"";
      // 
      // BEENDEN
      // 
      this->BEENDEN->Anchor = static_cast<System::Windows::Forms::AnchorStyles>((System::Windows::Forms::AnchorStyles::Bottom | System::Windows::Forms::AnchorStyles::Right));
      this->BEENDEN->BackColor = System::Drawing::Color::Red;
      this->BEENDEN->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 16.2F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
        static_cast<System::Byte>(0)));
      this->BEENDEN->Location = System::Drawing::Point(449, 346);
      this->BEENDEN->Name = L"BEENDEN";
      this->BEENDEN->Size = System::Drawing::Size(190, 74);
      this->BEENDEN->TabIndex = 1;
      this->BEENDEN->Text = L"BEENDEN";
      this->BEENDEN->UseVisualStyleBackColor = false;
      this->BEENDEN->Click += gcnew System::EventHandler(this, &Seite::BEENDEN_Click);
      // 
      // serialPort1
      // 
      this->serialPort1->DtrEnable = true;
      this->serialPort1->RtsEnable = true;
      this->serialPort1->PortName = "COM1";
            this->serialPort1->BaudRate = 9600;
            this->serialPort1->DataBits = 8;

      // 
      // START
      // 
      this->START->BackColor = System::Drawing::Color::Lime;
      this->START->Font = (gcnew System::Drawing::Font(L"Microsoft Sans Serif", 16.2F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point, 
        static_cast<System::Byte>(0)));
      this->START->Location = System::Drawing::Point(296, 346);
      this->START->Name = L"START";
      this->START->Size = System::Drawing::Size(147, 74);
      this->START->TabIndex = 4;
      this->START->Text = L"START";
      this->START->UseVisualStyleBackColor = false;
      this->START->Click += gcnew System::EventHandler(this, &Seite::START_Click);
      // 
      // Seite
      // 
      this->AutoScaleDimensions = System::Drawing::SizeF(8, 16);
      this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
      this->ClientSize = System::Drawing::Size(651, 432);
      this->Controls->Add(this->START);
      this->Controls->Add(this->BEENDEN);
      this->Controls->Add(this->richTextBox1);
      this->Name = L"Seite";
      this->Text = L"Seite";
      this->ResumeLayout(false);

    }
#pragma endregion

  private: System::Void BEENDEN_Click(System::Object^  sender, System::EventArgs^  e)
       {
         MessageBox::Show("Log-Program wird beendet");
       }


  private: System::Void START_Click(System::Object^  sender, System::EventArgs^  e)               {               
        serialPort1->Open();
        String^ s1 = serialPort1->ReadLine();
        richTextBox1->Text = s1;
        serialPort1->Close();
       }
};
}

[Arc N. (arc)]

Für den Anfang:
ReadLine wartet auf zwei Sachen: Das Zeilenende und/oder ein Timeout 
(ReadTimeout/WriteTimeout sind beide normalerweise 
SerialPort.InfiniteTimeout). D.h. da wird kein Timeout kommen, also 
dürfte es am NewLine liegen (normalerweise ist das nur "\n", nicht 
"\r\n" oder "\r").