terminalwin.cs

SerialPort 串口通讯用

// ==++==
// 
//   Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// ==--==
/*============================================================
**
** Class:  TerminalWindow
**
** Purpose: In CSTerm application, TerminalWindow acts as the
**		  : main I/O form, allowing connections to be opened
**        : or closed and lines/files to be read/written to the port
**		  
** Date:  August 2002
**
===========================================================*/

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.IO;
using System.Text;
using System.Net;


namespace System.IO.Ports
{
	
	public class TerminalWindow : System.Windows.Forms.Form
	{
		private System.Windows.Forms.StatusBar statusBar1;
		private System.Windows.Forms.RichTextBox richTextBox1;
		internal SerialPort serialPort1;
		internal bool usingModem = false;
		
		private System.ComponentModel.Container components = null;
		
		private System.Windows.Forms.RichTextBox richTextBox2;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.RichTextBox richTextBox3;
		private System.Windows.Forms.Button button3;
		private System.Windows.Forms.Button button4;
		internal System.Windows.Forms.TextBox textBox1;
		internal System.Windows.Forms.RadioButton radioButton1;
		internal System.Windows.Forms.RadioButton radioButton2;
		private int windowID;
		private System.Text.ASCIIEncoding asciiEncoding;
		
		
		public TerminalWindow(int windowID)
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();
			this.Text = "Terminal Window " + windowID;
			this.richTextBox1.Text = "";
			this.richTextBox2.Text = "";
			this.richTextBox3.Text = "";
			this.richTextBox2.Enabled = false;
			this.textBox1.Enabled = false;
			this.radioButton1.Enabled = false;
			this.radioButton2.Enabled = false;
			this.statusBar1.Text = "Ready";
			this.windowID = windowID;
			this.serialPort1 = new SerialPort();
			this.serialPort1.ReceivedEvent += new SerialEventHandler(gotIncomingText);
			this.serialPort1.ErrorEvent += new SerialEventHandler(gotIncomingError);
			this.serialPort1.ErrorEvent += new SerialEventHandler(gotIncomingPinChange);
			
			asciiEncoding = new System.Text.ASCIIEncoding();
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if(components != null)
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.statusBar1 = new System.Windows.Forms.StatusBar();
			this.richTextBox1 = new System.Windows.Forms.RichTextBox();
			this.richTextBox2 = new System.Windows.Forms.RichTextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.richTextBox3 = new System.Windows.Forms.RichTextBox();
			this.button3 = new System.Windows.Forms.Button();
			this.button4 = new System.Windows.Forms.Button();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.radioButton1 = new System.Windows.Forms.RadioButton();
			this.radioButton2 = new System.Windows.Forms.RadioButton();
			this.SuspendLayout();
			// 
			// statusBar1
			// 
			this.statusBar1.Location = new System.Drawing.Point(0, 310);
			this.statusBar1.Name = "statusBar1";
			this.statusBar1.Size = new System.Drawing.Size(704, 24);
			this.statusBar1.TabIndex = 0;
			this.statusBar1.Text = "statusBar1";
			// 
			// richTextBox1
			// 
			this.richTextBox1.Location = new System.Drawing.Point(16, 16);
			this.richTextBox1.Name = "richTextBox1";
			this.richTextBox1.Size = new System.Drawing.Size(520, 80);
			this.richTextBox1.TabIndex = 1;
			this.richTextBox1.Text = "Sender Text";
			// 
			// richTextBox2
			// 
			this.richTextBox2.Location = new System.Drawing.Point(16, 208);
			this.richTextBox2.Name = "richTextBox2";
			this.richTextBox2.Size = new System.Drawing.Size(416, 24);
			this.richTextBox2.TabIndex = 3;
			this.richTextBox2.Text = "Text Entry";
			this.richTextBox2.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.richTextBox2_KeyPress);
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(552, 16);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(88, 32);
			this.button1.TabIndex = 4;
			this.button1.Text = "Change Properties";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(552, 56);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(88, 32);
			this.button2.TabIndex = 5;
			this.button2.Text = "Open Connection";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// richTextBox3
			// 
			this.richTextBox3.Location = new System.Drawing.Point(16, 112);
			this.richTextBox3.Name = "richTextBox3";
			this.richTextBox3.Size = new System.Drawing.Size(520, 80);
			this.richTextBox3.TabIndex = 6;
			this.richTextBox3.Text = "Received Text";
			// 
			// button3
			// 
			this.button3.Location = new System.Drawing.Point(552, 192);
			this.button3.Name = "button3";
			this.button3.Size = new System.Drawing.Size(88, 32);
			this.button3.TabIndex = 7;
			this.button3.Text = "ReadFile";
			this.button3.Click += new System.EventHandler(this.button3_Click);
			// 
			// button4
			// 
			this.button4.Location = new System.Drawing.Point(552, 232);
			this.button4.Name = "button4";
			this.button4.Size = new System.Drawing.Size(88, 32);
			this.button4.TabIndex = 8;
			this.button4.Text = "SendFile";
			this.button4.Click += new System.EventHandler(this.button4_Click);
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(552, 96);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(112, 20);
			this.textBox1.TabIndex = 9;
			this.textBox1.Text = "Enter Phone Number";
			// 
			// radioButton1
			// 
			this.radioButton1.Checked = true;
			this.radioButton1.Location = new System.Drawing.Point(552, 120);
			this.radioButton1.Name = "radioButton1";
			this.radioButton1.TabIndex = 10;
			this.radioButton1.TabStop = true;
			this.radioButton1.Text = "Dial Mode";
			// 
			// radioButton2
			// 
			this.radioButton2.Location = new System.Drawing.Point(552, 144);
			this.radioButton2.Name = "radioButton2";
			this.radioButton2.TabIndex = 11;
			this.radioButton2.Text = "Answer Mode";
			// 
			// TerminalWindow
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(704, 334);
			this.Controls.Add(this.radioButton2);
			this.Controls.Add(this.radioButton1);
			this.Controls.Add(this.textBox1);
			this.Controls.Add(this.button4);
			this.Controls.Add(this.button3);
			this.Controls.Add(this.richTextBox3);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.richTextBox2);
			this.Controls.Add(this.richTextBox1);
			this.Controls.Add(this.statusBar1);
			this.Name = "TerminalWindow";
			this.Text = "Form2";
			this.ResumeLayout(false);

		}
		#endregion
		
	
		
		private void sendLine(string line) 
		{
			serialPort1.Write(line);
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			SettingsWindow sw = new SettingsWindow(this, windowID);
			this.Enabled = false;
			sw.Show();
		}

		private void button2_Click(object sender, System.EventArgs e)
		{
			if (serialPort1.IsOpen == false) {
				
				try {
					serialPort1.Open();
					richTextBox2.Enabled = true;
					button2.Text = "Close Connection";
					if (usingModem == true) {
						if (radioButton1.Checked == true) CallNumber();
						else AnswerCall();
					}
					this.richTextBox1.AppendText("SYSTEM: Connection opened\n");
				} catch (IOException exception) {
					MessageBox.Show("Invalid parameter set in Open(): " + exception.Message);
				}
			} else  {
				if (usingModem == true) Hangup();
				serialPort1.Close();
				button2.Text = "Open Connection";
				richTextBox2.Enabled = false;
				this.richTextBox1.AppendText("SYSTEM: Connection closed\n");
			}
		}

		private void Hangup() {
			bool ret = serialPort1.DtrEnable;
			byte [] hangUpCommand = asciiEncoding.GetBytes("ATH0\r\n");
			
			serialPort1.Write(hangUpCommand, 0, 4);
			
			serialPort1.DtrEnable = true;
			serialPort1.DtrEnable = false;
			serialPort1.DtrEnable = ret;
		}
		
		private void CallNumber() {
			
			string callText = "ATDT" + textBox1.Text + "\r\n";
			byte[] callCommand = asciiEncoding.GetBytes(callText);
			serialPort1.Write(callCommand, 0, callCommand.Length);
		}
		
		private void AnswerCall() {
			
			string answerText = "ATE1S0=1\r\n";
			byte[] answerCommand = asciiEncoding.GetBytes(answerText);
			serialPort1.Write(answerCommand, 0, answerCommand.Length);
		}
		
		
		private void gotIncomingText(object sender, SerialEventArgs e) 
		{
			string receivedText = serialPort1.ReadAvailable();
			this.richTextBox3.AppendText(receivedText);
		}
		
		
		private void gotIncomingError(object sender, SerialEventArgs e) 
		{
			serialPort1.DiscardInBuffer();
			serialPort1.DiscardOutBuffer();
			MessageBox.Show("A communications error has occurred.");
			richTextBox1.AppendText("\nSYSTEM: -------------- Comm Error: " + (int) e.EventType + " ---------------\n");
			richTextBox3.AppendText("\nSYSTEM: -------------- Comm Error: " + (int) e.EventType + " ---------------\n");
			richTextBox2.Text = "";
		}
		
		private void gotIncomingPinChange(object sender, SerialEventArgs e)
		{
			if ((e.EventType & SerialEvents.Ring) != SerialEvents.None) 
				richTextBox1.AppendText("SYSTEM: Ring Detected\n");
			if ((e.EventType & SerialEvents.CDChanged) != SerialEvents.None) 
				if (serialPort1.CDHolding == true) richTextBox1.AppendText("SYSTEM: CD High \n");
				else richTextBox1.AppendText("SYSTEM: CD Low\n");
			if ((e.EventType & SerialEvents.CtsChanged) != SerialEvents.None) 
				if (serialPort1.CtsHolding == true) richTextBox1.AppendText("SYSTEM: CTS High \n");
				else richTextBox1.AppendText("SYSTEM: CTS Low\n");
			if ((e.EventType & SerialEvents.DsrChanged) != SerialEvents.None) 
				if (serialPort1.DsrHolding == true) richTextBox1.AppendText("SYSTEM: DSR High \n");
				else richTextBox1.AppendText("SYSTEM: DSR Low\n");
		}
		
		private void richTextBox2_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
		{
			if (Equals(e.KeyChar, Environment.NewLine[0])) 
			{
			
				if (serialPort1.IsOpen == false) {
					this.richTextBox1.AppendText("SYSTEM: Cannot send - no connection open!\n");
				} else {
					
					// should be encoding-dependent, converted in
					// serialPort1.Write to whatever is appropriate.
			
					sendLine(richTextBox2.Text);
					this.richTextBox1.AppendText(richTextBox2.Text);
				}
					this.richTextBox2.Text = "";
				
			} 
			
			
		}

		// receive file
		private void button3_Click(object sender, System.EventArgs e)
		{
			if (serialPort1.IsOpen == false) return;
			
			Stream myStream ;
			SaveFileDialog saveFileDialog1 = new SaveFileDialog();

			saveFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*"  ;
			saveFileDialog1.FilterIndex = 2 ;
			saveFileDialog1.RestoreDirectory = true ;

			if(saveFileDialog1.ShowDialog() == DialogResult.OK)
			{
				int currentTimeout;
				 
				byte [] byteBuffer = new byte[1000];
				int numJustRead;
					int total = 0;
				if((myStream = saveFileDialog1.OpenFile()) != null)
				{
					// protocol - wait 20 sec. for any data to begin
					// then, read until 500 ms. elapse without any more data as a singal
					// for End of Stream
					int oldTimeout = serialPort1.ReadTimeout;
					serialPort1.ReadTimeout = 20000;
					currentTimeout = 20000;
					serialPort1.DiscardInBuffer();
					
					// turn off receive events
					serialPort1.EventFilter = SerialEvents.None;
					
					
					while ((numJustRead = serialPort1.Read(byteBuffer, 0, 1000)) != 0) {
						if (currentTimeout == 20000) serialPort1.ReadTimeout = 500;
						myStream.Write(byteBuffer, 0, numJustRead);
						total+= numJustRead;
					}
					
					myStream.Close();
					MessageBox.Show("File saved.  Size: " + total + " bytes.");
					
					serialPort1.EventFilter = SerialEvents.All;
					serialPort1.ReadTimeout = oldTimeout;
				}
			}
		}

		// send file
		private void button4_Click(object sender, System.EventArgs e)
		{
		
			if (serialPort1.IsOpen == false) return;
			
			// use open file dialog
			Stream myStream;
			OpenFileDialog openFileDialog1 = new OpenFileDialog();

			openFileDialog1.InitialDirectory = "c:\\" ;
			openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*" ;
			openFileDialog1.FilterIndex = 2 ;
			openFileDialog1.RestoreDirectory = true ;

			if(openFileDialog1.ShowDialog() == DialogResult.OK)
			{
				byte [] byteBuffer = new byte[1000];
				int numJustRead;
				
				serialPort1.DiscardOutBuffer();
				if((myStream = openFileDialog1.OpenFile())!= null)
				{
					// use stream-transfer paradigm to throw all bytes to output
					while ((numJustRead = myStream.Read(byteBuffer, 0, 1000)) != 0) {
						serialPort1.Write(byteBuffer, 0, numJustRead);
					}
					myStream.Close();
				}
			}
		}
	}
}