本文介绍了一种通过两个串口实现同步数据传输的方法。利用COM1发送数据至COM2，并在数据完整接收后反馈，确保数据准确无误地传输。文章提供了完整的C#代码示例。
通过COM1发送数据，COM2接收数据。当COM2接收完本次发送的数据后，向COM1发送信息通知COM1本次数据已发完，COM1接到通知后，再发下一段数据。这样可以确保每次发送的数据都可以被正确接收。
代码：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 | using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.IO.Ports;using System.Threading;using Utils;namespace 串口通信{ public partial class Form1 : Form { #region 变量 /// <summary> /// 启动还是停止，true起动，false停止 /// </summary> public static bool start = true; /// <summary> /// 串口资源 /// </summary> private static SerialPort serialPort1 = null; /// <summary> /// 串口资源 /// </summary> private static SerialPort serialPort2 = null; /// <summary> /// 成功次数 /// </summary> private static int successCount = 0; /// <summary> /// 失败次数 /// </summary> private static int errorCount = 0; /// <summary> /// 上次计算的总次数 /// </summary> private static int lastCount = 0; /// <summary> /// 定时器 /// </summary> private System.Windows.Forms.Timer timer = new System.Windows.Forms.Timer(); #endregion #region Form1 public Form1() { InitializeComponent(); } #endregion #region Form1_Load private void Form1_Load(object sender, EventArgs e) { serialPort1 = new SerialPort("COM1"); serialPort1.DataReceived += new SerialDataReceivedEventHandler(serialPort_DataReceived1); serialPort1.Open(); serialPort2 = new SerialPort("COM2"); serialPort2.DataReceived += new SerialDataReceivedEventHandler(serialPort_DataReceived2); serialPort2.Open(); } #endregion #region Form1_FormClosed private void Form1_FormClosed(object sender, FormClosedEventArgs e) { serialPort1.Close(); serialPort1.Dispose(); serialPort2.Close(); serialPort2.Dispose(); } #endregion #region btnStart_Click private void btnStart_Click(object sender, EventArgs e) { start = true; SendData(); timer.Interval = 500; timer.Tick += new EventHandler(delegate(object obj, EventArgs eventArgs) { if (lastCount == 0) { lastCount = successCount + errorCount; } else { int cnt = successCount + errorCount - lastCount; cnt = Data.Length * cnt / 1024 * (1000 / timer.Interval); double total = (successCount + errorCount) * Data.Length / 1024.0; InvokeDelegate invokeDelegate = delegate() { label3.Text = cnt.ToString() + "KB/S " + total.ToString("#.0") + "KB"; }; InvokeUtil.Invoke(this, invokeDelegate); lastCount = successCount + errorCount; } }); timer.Start(); } #endregion #region btnStop_Click private void btnStop_Click(object sender, EventArgs e) { start = false; timer.Stop(); timer.Dispose(); timer = new System.Windows.Forms.Timer(); } #endregion #region 接收串口数据事件 /// <summary> /// 接收串口数据事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> public void serialPort_DataReceived1(object sender, SerialDataReceivedEventArgs e) { if (serialPort1.ReadLine() != null) { successCount++; SendData(); } } /// <summary> /// 接收串口数据事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> public void serialPort_DataReceived2(object sender, SerialDataReceivedEventArgs e) { List<byte> bList = new List<byte>(); int i = 0; while (serialPort2.BytesToRead > 0) { byte[] bArr = new byte[serialPort2.BytesToRead]; i += serialPort2.Read(bArr, 0, bArr.Length); bList.AddRange(bArr); } serialPort2.WriteLine("success"); string s = ASCIIEncoding.UTF8.GetString(bList.ToArray()); InvokeDelegate invokeDelegate = delegate() { textBox2.Text = s; }; InvokeUtil.Invoke(this, invokeDelegate); if (s != Str) { errorCount++; invokeDelegate = delegate() { label2.Text = errorCount + "次不相等(失败)"; }; InvokeUtil.Invoke(this, invokeDelegate); } else { invokeDelegate = delegate() { label1.Text = successCount + "次相等(成功)"; }; InvokeUtil.Invoke(this, invokeDelegate); } } #endregion #region 发送数据 private void SendData() { if (start) { Thread thread = new Thread(new ParameterizedThreadStart(delegate(object obj) { InvokeDelegate invokeDelegate = delegate() { textBox1.Text = Str; }; InvokeUtil.Invoke(this, invokeDelegate); serialPort1.Write(Data, 0, Data.Length); })); thread.Start(); } } #endregion #region 数据 private static byte[] data = null; /// <summary> /// 数据 /// </summary> private static byte[] Data { get { if (data == null) { data = ASCIIEncoding.UTF8.GetBytes(Str); } return data; } } #endregion #region 获取字符串 private static string str = null; /// <summary> /// 字符串 /// </summary> private static string Str { get { if (str == null) { StringBuilder sb = new StringBuilder(); for (int i = 0; i < 270; i++) { sb.Append("计算机程序"); } str = sb.ToString(); } return str; } } #endregion }} |
辅助代码：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | using System;using System.Collections.Generic;using System.Text;using System.Windows.Forms;namespace Utils{ /// <summary> /// 跨线程访问控件的委托 /// </summary> public delegate void InvokeDelegate(); /// <summary> /// 跨线程访问控件类 /// </summary> public class InvokeUtil { /// <summary> /// 跨线程访问控件 /// </summary> /// <param name="ctrl">Form对象</param> /// <param name="de">委托</param> public static void Invoke(Control ctrl, Delegate de) { if (ctrl.IsHandleCreated) { ctrl.BeginInvoke(de); } } }}View Code using System;using System.Collections.Generic;using System.Linq;using System.Text;using Microsoft.Win32;using System.Security.Permissions;using System.IO.Ports;using System.Security;namespace Utils{ /// <summary> /// 串口资源工具类 /// </summary> public class SerialPortUtil { #region 获取本机串口列表，包括虚拟串口 /// <summary> /// 获取本机串口列表，包括虚拟串口 /// </summary> public static string[] GetCOMList() { List<string> list = new List<string>(); foreach (string portName in SerialPort.GetPortNames()) { list.Add(portName); } return list.ToArray(); } #endregion #region 从注册表获取本机串口列表 /// <summary> /// 从注册表获取本机串口列表 /// </summary> public static string[] GetPortNames() { RegistryKey localMachine = null; RegistryKey key2 = null; string[] textArray = null; //这里有个断言，判断该注册表项是否存在 new RegistryPermission(RegistryPermissionAccess.Read, @"HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\SERIALCOMM").Assert(); try { localMachine = Registry.LocalMachine; key2 = localMachine.OpenSubKey(@"HARDWARE\DEVICEMAP\SERIALCOMM", false); if (key2 != null) { string[] valueNames = key2.GetValueNames(); textArray = new string[valueNames.Length]; for (int i = 0; i < valueNames.Length; i++) { textArray[i] = (string)key2.GetValue(valueNames[i]); } } } finally { if (localMachine != null) { localMachine.Close(); } if (key2 != null) { key2.Close(); } CodeAccessPermission.RevertAssert(); } if (textArray == null) { textArray = new string[0]; } return textArray; } #endregion }} |
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