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Ich möchte über die Serielle Schnittstelle JPEG Files übertragen (in C#)

Allgemeine Diskussion Ich möchte über die Serielle Schnittstelle JPEG Files übertragen (in C#)

  • Mittwoch, 16. Mai 2012 06:00
     
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    Ich habe das Problem, dass ich auf der Empfangsseite nicht vollständig bekomme. Nach ungefähr 12 kBytes hört die Übertragung auf. Was mache ich da nur falsch?

    Sendeseite:

     using System;
  using System.Collections.Generic;
  using System.ComponentModel;
  using System.Data;
  using System.Drawing;
  using System.Text;
  using System.Windows.Forms;
  using System.Linq;
  using System.IO;


namespace SimpleSerial
{
    public partial class Form1 : Form
    {
        // Add this variable

        string RxString;
        byte[] b;

        public Form1()
        {
            InitializeComponent();
        }

        private void buttonStart_Click(object sender, EventArgs e)
        {
            serialPort1.PortName = "COM9";
            serialPort1.BaudRate = 57600;

            serialPort1.Open();
            if (serialPort1.IsOpen)
            {
                buttonStart.Enabled = false;
                buttonStop.Enabled = true;
                textBox1.ReadOnly = false;
            }
        }

        private void buttonStop_Click(object sender, EventArgs e)
        {
            if (serialPort1.IsOpen)
            {
                serialPort1.Close();
                buttonStart.Enabled = true;
                buttonStop.Enabled = false;
                textBox1.ReadOnly = false;
            }

        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (serialPort1.IsOpen) serialPort1.Close();
        }

        private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            // If the port is closed, don't try to send a character.

            if (!serialPort1.IsOpen) return;

            // If the port is Open, declare a char[] array with one element.
            char[] buff = new char[1];

            // Load element 0 with the key character.

            buff[0] = e.KeyChar;

            // Send the one character buffer.
            serialPort1.Write(buff, 0, 1);

            // Set the KeyPress event as handled so the character won't
            // display locally. If you want it to display, omit the next line.
            e.Handled = true;
        }

        private void DisplayText(object sender, EventArgs e)
        {
            
            textBox1.AppendText(RxString);
        }

        private void serialPort1_DataReceived
          (object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
            RxString = serialPort1.ReadExisting();
            //int y = serialPort1.BytesToWrite;
            this.Invoke(new EventHandler(DisplayText));
        }

        private string ByteArrayToString(byte[] arr)
        {
            System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
            return enc.GetString(arr);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            
            string path = @"C:\Users\ipa\Desktop\adidas.jpg";

           

                       //Open the stream and read it back.
            using (FileStream fs = File.OpenRead(path))
            {
                
                Int64 f = fs.Length;
                byte[] b = new byte[f];
                               
                decimal pakete = f/138;
                decimal paket = Math.Round(pakete);
                fs.Read(b, 0, b.Length);
                Int32 offset=0;


                for (int a = 0; a <= paket-1; a++)
                {
                    serialPort1.Write(b,offset,138);
                    System.Threading.Thread.Sleep(99);
                    offset = offset + 138 ;
                    
                        
                }serialPort1.Close();
            }
                
            
        }

        private static void AddText(FileStream fs, string value)
        {
            byte[] info = new UTF8Encoding(true).GetBytes(value);
            fs.Write(info, 0, info.Length);
        }



        public char v { get; set; }

    }



}

    Empfangsseite:

      
    using System;
  using System.Collections.Generic;
  using System.ComponentModel;
  using System.Data;
  using System.Drawing;
  using System.Text;
  using System.Windows.Forms;
 
  namespace SimpleSerial
  {
      public partial class Form1 : Form
      {
          // Add this variable

          string RxString;
          byte[] buff2 = new byte[98152];
          int offset = 0;
          int x;
          
          public Form1()
          {
              InitializeComponent();
          }
 
          private void buttonStart_Click(object sender, EventArgs e)
          {
              serialPort1.PortName = "COM9";
              serialPort1.BaudRate = 57600;
 
              serialPort1.Open();
              if (serialPort1.IsOpen)
              {
                  buttonStart.Enabled = false;
                  buttonStop.Enabled = true;
                  textBox1.ReadOnly = false;
              }
          }
 
          private void buttonStop_Click(object sender, EventArgs e)
          {
              if (serialPort1.IsOpen)
              {
                  serialPort1.Close();
                  buttonStart.Enabled = true;
                  buttonStop.Enabled = false;
                  textBox1.ReadOnly = false;
              }
 
          }
 
          private void Form1_FormClosing(object sender, FormClosingEventArgs e)
          {
              if (serialPort1.IsOpen) serialPort1.Close();
          }
 
          private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
          {
              // If the port is closed, don't try to send a character.

              if(!serialPort1.IsOpen) return;
 
              // If the port is Open, declare a char[] array with one element.
              char[] buff = new char[1];
              
              // Load element 0 with the key character.

              buff[0] = e.KeyChar;
 
              // Send the one character buffer.
              serialPort1.Write(buff, 0, 1);
 
              // Set the KeyPress event as handled so the character won't
              // display locally. If you want it to display, omit the next line.
              e.Handled = true;
          }

          private string ByteArrayToString(byte[] arr)
          {
              System.Text.ASCIIEncoding enc = new System.Text.ASCIIEncoding();
              return enc.GetString(arr);
          }

          private void DisplayText(object sender, EventArgs e)
          {
              RxString = ByteArrayToString(buff2);
              textBox1.AppendText(RxString);
          }

          private void CreateFile(byte[] file)
          {
              string path = @"C:\Users\ipa\Desktop\testbilder\test2.jpg";
              if (!System.IO.File.Exists(path) || System.IO.File.Exists(path))
              {
                  using (System.IO.FileStream fs = System.IO.File.Create(path))
                  {

                      fs.Write(buff2, 0, buff2.Length);
                      
                  }
              }
              
          }


          private void serialPort1_DataReceived
            (object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
          {
              
              do
              {
                  x = serialPort1.Read(buff2, offset, serialPort1.BytesToRead);
                  serialPort1.DiscardInBuffer();
                  offset = offset + x;
                  
              } while (offset <= 30100);
                      
              CreateFile(buff2);
                      
                  
               
              //buff.CopyTo(buff2, offset);
              //offset = offset + x;
              //CreateFile(buff2);      
                    
                        
                        //serialPort1.Close();
          }
      }
  }

     




     

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