C# 串口通信 实例源码下载

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.IO.Ports;using System.Threading;using Microsoft.Win32;namespace TEXTCOM{ public partial class Form1 : Form { public Form1() { InitializeComponent(); } private SerialPort Sp = new SerialPort(); public delegate void HandleInterfaceUpdataDelegate(string text); //委托，此为重点 private HandleInterfaceUpdataDelegate interfaceUpdataHandle; private bool qiii = false; public void Sp_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e) { string strTemp = ""; double iSecond = 0.5; DateTime dtOld = System.DateTime.Now; DateTime dtNow = System.DateTime.Now; TimeSpan dtInter; dtInter = dtNow - dtOld; int i = Sp.BytesToRead; if (i > 0) { try { strTemp = Sp.ReadExisting(); } catch { } if (strTemp.ToLower().IndexOf("\r") < 0) { i = 0; } else { this.Invoke(interfaceUpdataHandle, strTemp); } } while (dtInter.TotalSeconds < iSecond && i <= 0) { dtNow = System.DateTime.Now; dtInter = dtNow - dtOld; i = Sp.BytesToRead; if (i > 0) { try { strTemp = Sp.ReadExisting(); } catch { } if (strTemp.ToLower().IndexOf("\r") < 0) { i = 0; } else { this.Invoke(interfaceUpdataHandle, strTemp); } } } // do null } private void UpdateTextBox(string text) { textBox2.Text = text; } /// <summary> /// 执行AT指令并返回 成功失败 /// </summary> /// <param name="ATCmd">AT指令</param> /// <param name="StCmd">AT指令标准结束标识</param> /// <returns></returns> private void ATCommand3(string ATCmd, string StCmd) { string response = ""; response = ATCommand(ATCmd, StCmd); } /// <summary> /// 执行AT指令并返回结果字符 /// </summary> /// <param name="ATCmd">AT指令</param> /// <param name="StCmd">AT指令标准结束标识</param> /// <returns></returns> private string ATCommand(string ATCmd, string StCmd) { string response = ""; int i; if (!ATCmd.EndsWith("\x01a")) { if (!(ATCmd.EndsWith("\r") || ATCmd.EndsWith("\r\n"))) { ATCmd = ATCmd "\r"; } } Sp.WriteLine(ATCmd); //第一次读响应数据 if (Sp.BytesToRead > 0) { response = Sp.ReadExisting(); //去除前端多可能多读取的字符 if (response.IndexOf(ATCmd) > 0) { response = response.Substring(response.IndexOf(ATCmd)); } else { } if (response == "" || response.IndexOf(StCmd) < 0) { if (response != "") { if (response.Trim() == "ERROR") { //throw vError = new UnknowException("Unknown exception in sending command:" ATCmd); } if (response.IndexOf(" CMS ERROR") >= 0) { string[] cols = new string[100]; cols = response.Split(';'); if (cols.Length > 1) { string errorCode = cols[1]; } } } } } //读第一次没有读完的响应数据，直到读到特征数据或超时 for (i = 0; i < 3; i ) { Thread.Sleep(1000); response = response Sp.ReadExisting(); if (response.IndexOf(StCmd) >= 0) { break; } } return response; } /// <summary> /// 从注册表获取系统串口列表 /// </summary> private void GetComList() { RegistryKey keyCom = Registry.LocalMachine.OpenSubKey("Hardware\\DeviceMap\\SerialComm"); if (keyCom != null) { string[] sSubKeys = keyCom.GetValueNames(); this.comboBox1.Items.Clear(); foreach (string sName in sSubKeys) { string sValue = (string)keyCom.GetValue(sName); this.comboBox2.Items.Add(sValue); } } } private void cmID_DropDown(object sender, EventArgs e) { GetComList(); } private void Form1_Load_1(object sender, EventArgs e) { GetComList(); btPause.Enabled = false; } private void Form1_FormClosing(object sender, FormClosingEventArgs e) { Sp.Close(); } private void btPause_Click_1(object sender, EventArgs e) { Sp.Close(); btENT.Enabled = true; btPause.Enabled = false; } private void btEnt_Click_1(object sender, EventArgs e) { if ((this.comboBox2.Text.Trim() != "") && (this.comboBox1.Text != "")) { interfaceUpdataHandle = new HandleInterfaceUpdataDelegate(UpdateTextBox);//实例化委托对象 Sp.PortName = this.comboBox2.Text.Trim(); Sp.BaudRate = Convert.ToInt32(this.comboBox1.Text.Trim()); Sp.Parity = Parity.None; Sp.StopBits = StopBits.One; Sp.DataReceived = new SerialDataReceivedEventHandler(Sp_DataReceived); Sp.ReceivedBytesThreshold = 1; try { Sp.Open(); ATCommand3("AT CLIP=1\r", "OK"); btPause.Enabled = true; btENT.Enabled = false; } catch { MessageBox.Show("端口" this.comboBox2.Text.Trim() "打开失败！"); } } else { MessageBox.Show("请输入正确的端口号和波特率！"); this.comboBox2.Focus(); } } }}