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Tài trợ cho PIC Vietnam |
Giao tiếp USB, CAN, I2C, SPI, USART... Những giao tiếp được tích hợp trên PIC |
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Ðiều Chỉnh | Xếp Bài |
23-12-2012, 06:04 PM | #17 |
Nhập môn đệ tử
Tham gia ngày: Dec 2012
Bài gửi: 1
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BÁC NÀO BIẾT ĐOẠN CODE VẼ ĐỒ THỊ NÀY CHÚ THÍCH CHO EM ÍT
#region Namespace Inclusions using System; using System.Linq; using System.Data; using System.Text; using System.Drawing; using System.IO.Ports; using System.Windows.Forms; using System.ComponentModel; using System.Collections.Generic; using DynamicData.Properties; using System.Threading; using System.IO; using ZedGraph; #endregion namespace DynamicData { #region Public Enumerations public enum DataMode { Text, Hex } public enum LogMsgType { Incoming, Outgoing, Normal, Warning, Error }; #endregion public partial class frmMain : Form { #region Local Variables // The main control for communicating through the RS-232 port private SerialPort comport = new SerialPort(); // Various colors for logging info private Color[] LogMsgTypeColor = { Color.Blue, Color.Green, Color.Black, Color.Orange, Color.Red }; // Temp holder for whether a key was pressed //private bool KeyHandled = false; private Settings settings = Settings.Default; #endregion private GraphPane myPane; private PointPairList m_pointsList; int flagData = 0; int flagPoint = 0; int nIndex = 0; int inputData1 = 0; int inputData2 = 0; // Starting time in milliseconds int tickStart = 0; public frmMain() { InitializeComponent(); // Restore the users settings InitializeControlValues(); // Enable/disable controls based on the current state EnableControls(); // When data is recieved through the port, call this method comport.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived); button1.Enabled = false; button2.Enabled = false; CurrentDataMode = DataMode.Hex; } private void Form1_Load( object sender, EventArgs e )//khi { myPane = zedGraphControl1.GraphPane; myPane.Title.Text = "Biểu đồ\n" + "Ứng Suất/Độ biến dạng"; myPane.YAxis.Title.Text = "Ứng Suất, kN/Cm2";//truc x ghi ung suat myPane.XAxis.Title.Text = "Độ biến dạng, mm/m"; // Scale the axes zedGraphControl1.AxisChange(); // Save the beginning time for reference tickStart = Environment.TickCount; m_pointsList = new PointPairList(); } private void CreateLineGraph() { myPane.CurveList.Clear(); /* // Test m_pointsList.Add(0, 0); m_pointsList.Add(10, 2000); m_pointsList.Add(50, 10000); m_pointsList.Add(100, 20000); */ // Generate a blue curve with Star symbols LineItem myCurve = myPane.AddCurve("Đường đặc tính", m_pointsList, Color.Blue, SymbolType.Star); // Make sure the Y axis is rescaled to accommodate actual data zedGraphControl1.AxisChange(); // Force a redraw zedGraphControl1.Invalidate(); } private void Form1_Resize( object sender, EventArgs e ) { SetSize(); } // Set the size and location of the ZedGraphControl private void SetSize() { // Control is always 10 pixels inset from the client rectangle of the form Rectangle formRect = this.ClientRectangle; formRect.Inflate( -10, -10 ); if ( zedGraphControl1.Size != formRect.Size ) { zedGraphControl1.Location = formRect.Location; zedGraphControl1.Size = formRect.Size; } } private void btnOpenPort_Click(object sender, EventArgs e) { bool error = false; // If the port is open, close it. if (comport.IsOpen) comport.Close(); else { // Set the port's settings comport.BaudRate = int.Parse(cmbBaudRate.Text); comport.DataBits = int.Parse(cmbDataBits.Text); comport.StopBits = (StopBits)Enum.Parse(typeof(StopBits), cmbStopBits.Text); comport.Parity = (Parity)Enum.Parse(typeof(Parity), cmbParity.Text); comport.PortName = cmbPortName.Text; try { // Open the port comport.Open(); } catch (UnauthorizedAccessException) { error = true; } catch (IOException) { error = true; } catch (ArgumentException) { error = true; } if (error) MessageBox.Show(this, "Could not open the COM port. Most likely it is already in use, has been removed, or is unavailable.", "COM Port Unavalible", MessageBoxButtons.OK, MessageBoxIcon.Stop); } // Change the state of the form's controls EnableControls(); } /// <summary> Convert a string of hex digits (ex: E4 CA B2) to a byte array. </summary> /// <param name="s"> The string containing the hex digits (with or without spaces). </param> /// <returns> Returns an array of bytes. </returns> private byte[] HexStringToByteArray(string s) { s = s.Replace(" ", ""); byte[] buffer = new byte[s.Length / 2]; for (int i = 0; i < s.Length; i += 2) buffer[i / 2] = (byte)Convert.ToByte(s.Substring(i, 2), 16); return buffer; } /// <summary> Converts an array of bytes into a formatted string of hex digits (ex: E4 CA B2)</summary> /// <param name="data"> The array of bytes to be translated into a string of hex digits. </param> /// <returns> Returns a well formatted string of hex digits with spacing. </returns> private string ByteArrayToHexString(byte[] data) { StringBuilder sb = new StringBuilder(data.Length * 3); foreach (byte b in data) sb.Append(Convert.ToString(b, 16).PadLeft(2, '0').PadRight(3, ' ')); return sb.ToString().ToUpper(); } /// <summary> Enable/disable controls based on the app's current state. </summary> private void EnableControls() { // Enable/disable controls based on whether the port is open or not gbPortSettings.Enabled = !comport.IsOpen; //txtSendData.Enabled = btnSend.Enabled = comport.IsOpen; //chkDTR.Enabled = chkRTS.Enabled = comport.IsOpen; if (comport.IsOpen) { btnOpenPort.Text = "&Close Port"; button1.Enabled = true; button2.Enabled = true; } else { btnOpenPort.Text = "&Open Port"; button1.Enabled = false; button2.Enabled = false; } } private string[] OrderedPortNames() { // Just a placeholder for a successful parsing of a string to an integer int num; // Order the serial port names in numberic order (if possible) return SerialPort.GetPortNames().OrderBy(a => a.Length > 3 && int.TryParse(a.Substring(3), out num) ? num : 0).ToArray(); } /// <summary> Populate the form's controls with default settings. </summary> private void InitializeControlValues() { cmbParity.Items.Clear(); cmbParity.Items.AddRange(Enum.GetNames(typeof(Pari ty))); cmbStopBits.Items.Clear(); cmbStopBits.Items.AddRange(Enum.GetNames(typeof(St opBits))); cmbParity.Text = settings.Parity.ToString(); cmbStopBits.Text = settings.StopBits.ToString(); cmbDataBits.Text = settings.DataBits.ToString(); cmbParity.Text = settings.Parity.ToString(); cmbBaudRate.Text = settings.BaudRate.ToString(); RefreshComPortList(); // If it is still avalible, select the last com port used if (cmbPortName.Items.Contains(settings.PortName)) cmbPortName.Text = settings.PortName; else if (cmbPortName.Items.Count > 0) cmbPortName.SelectedIndex = cmbPortName.Items.Count - 1; else { MessageBox.Show(this, "There are no COM Ports detected on this computer.\nPlease install a COM Port and restart this app.", "No COM Ports Installed", MessageBoxButtons.OK, MessageBoxIcon.Error); this.Close(); } } private void tmrCheckComPorts_Tick(object sender, EventArgs e) { // checks to see if COM ports have been added or removed // since it is quite common now with USB-to-Serial adapters RefreshComPortList(); } private void RefreshComPortList() { // Determain if the list of com port names has changed since last checked string selected = RefreshComPortList(cmbPortName.Items.Cast<string>( ), cmbPortName.SelectedItem as string, comport.IsOpen); // If there was an update, then update the control showing the user the list of port names if (!String.IsNullOrEmpty(selected)) { cmbPortName.Items.Clear(); cmbPortName.Items.AddRange(OrderedPortNames()); cmbPortName.SelectedItem = selected; } } private string RefreshComPortList(IEnumerable<string> PreviousPortNames, string CurrentSelection, bool PortOpen) { // Create a new return report to populate string selected = null; // Retrieve the list of ports currently mounted by the operating system (sorted by name) string[] ports = SerialPort.GetPortNames(); // First determain if there was a change (any additions or removals) bool updated = PreviousPortNames.Except(ports).Count() > 0 || ports.Except(PreviousPortNames).Count() > 0; // If there was a change, then select an appropriate default port if (updated) { // Use the correctly ordered set of port names ports = OrderedPortNames(); // Find newest port if one or more were added string newest = SerialPort.GetPortNames().Except(PreviousPortNames ).OrderBy(a => a).LastOrDefault(); // If the port was already open... (see logic notes and reasoning in Notes.txt) if (PortOpen) { if (ports.Contains(CurrentSelection)) selected = CurrentSelection; else if (!String.IsNullOrEmpty(newest)) selected = newest; else selected = ports.LastOrDefault(); } else { if (!String.IsNullOrEmpty(newest)) selected = newest; else if (ports.Contains(CurrentSelection)) selected = CurrentSelection; else selected = ports.LastOrDefault(); } } // If there was a change to the port list, return the recommended default selection return selected; } private void port_DataReceived(object sender, SerialDataReceivedEventArgs e) { // Read all the data waiting in the buffer int data = comport.ReadByte(); // Check data if (data == 0xAA) { flagData = 1; nIndex++; return; } if ((flagData == 1) & (nIndex == 1)) { inputData1 = data; nIndex++; return; } if ((flagData == 1) & (nIndex == 2)) { inputData2 = data; flagPoint = 1; nIndex++; } if ((data == 0x55) & (nIndex == 3)) { nIndex = 0; flagData = 0; } if (flagPoint == 1) { m_pointsList.Add((inputData1 * 256 + inputData2) / 10, (inputData1 * 256 + inputData2) * 0.2/10000); CreateLineGraph(); flagPoint = 0; } } private void cmbBaudRate_Validating(object sender, CancelEventArgs e) { int x; e.Cancel = !int.TryParse(cmbBaudRate.Text, out x); } private void cmbDataBits_Validating(object sender, CancelEventArgs e) { int x; e.Cancel = !int.TryParse(cmbDataBits.Text, out x); } #region Local Properties private DataMode CurrentDataMode { get { if (rbHex.Checked) return DataMode.Hex; else return DataMode.Text; } set { if (value == DataMode.Text) rbText.Checked = true; else rbHex.Checked = true; } } #endregion private void button2_Click(object sender, EventArgs e) { CreateLineGraph(); } private void button1_Click(object sender, EventArgs e) { myPane.CurveList.Clear(); m_pointsList.Clear(); // Force a redraw zedGraphControl1.Invalidate(); } private void btnClear_Click(object sender, EventArgs e) { } } } |
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