C#串口通信总结.doc

C#串口通信总结作者：不详 出处：网络转载 2011/10/10 16:01:52 阅读 0 次 我们知道对于标准DLL,可以采用DllImport进行调用。例如：DllImport(KMY350X.dll)private static extern int OpenPort(int PortNum, int BaudRate); 甘特图Xgantt（全球首款甘特图32年历史） Visual WebGui（完美的用户界面解决方案） Stimulsoft Reports.Net（报表生成控件） DXperience Uni Premium 白金版(慧都独家) 如果一些厂家比较懒的话，没有提供相应的dll,我们只能对它进行串口通信编程了。以前从没接触过串口编程，最近在一个项目中有几个地方都需要采用串口通信，跟公司一个老手请教后，感觉学到了很多东西，特在此做个总结: 一：首先我们来认识下什么是串口： 右键 我的电脑-管理-设备管理器-端口，选择一个端口，点击属性。 我们可以看到该串口的属性，在C#中我们使用SerialPort类来表示串口 ConfigClass config = new ConfigClass();comm.serialPort.PortName = config.ReadConfig(SendHealCard);/波特率comm.serialPort.BaudRate = 9600;/数据位comm.serialPort.DataBits = 8;/两个停止位comm.serialPort.StopBits = System.IO.Ports.StopBits.One;/无奇偶校验位comm.serialPort.Parity = System.IO.Ports.Parity.None;comm.serialPort.ReadTimeout = 100;comm.serialPort.WriteTimeout = -1; 二：串口调试工具： 在对串口进行编程时候，我们要向串口发送指令，然后我们解析串口返回的指令。在这里向大家推荐一款工具。 串口调试助手.exe 将要发送的指令用空格隔开，选择HEX显示为放回的字符串。 三：正式编程： 编写Comm类: public class Commpublic delegate void EventHandle(byte readBuffer);public event EventHandle DataReceived; public SerialPort serialPort;Thread thread;volatile bool _keepReading; public Comm()serialPort = new SerialPort();thread = null;_keepReading = false; public bool IsOpengetreturn serialPort.IsOpen; private void StartReading()if (!_keepReading)_keepReading = true;thread = new Thread(new ThreadStart(ReadPort);thread.Start(); private void StopReading()if (_keepReading)_keepReading = false;thread.Join();thread = null; private void ReadPort()while (_keepReading)if (serialPort.IsOpen)int count = serialPort.BytesToRead;if (count 0)byte readBuffer = new bytecount;tryApplication.DoEvents();serialPort.Read(readBuffer, 0, count);if(DataReceived != null)DataReceived(readBuffer);Thread.Sleep(100);catch (TimeoutException) public void Open()Close();serialPort.Open();if (serialPort.IsOpen)StartReading();elseMessageBox.Show(串口打开失败！); public void Close()StopReading();serialPort.Close(); public void WritePort(byte send, int offSet, int count)if (IsOpen)serialPort.Write(send, offSet, count); 注册串口： Comm comm = new Comm();ConfigClass config = new ConfigClass();comm.serialPort.PortName = config.ReadConfig(SendHealCard);/波特率comm.serialPort.BaudRate = 9600;/数据位comm.serialPort.DataBits = 8;/两个停止位comm.serialPort.StopBits = System.IO.Ports.StopBits.One;/无奇偶校验位comm.serialPort.Parity = System.IO.Ports.Parity.None;comm.serialPort.ReadTimeout = 100;comm.serialPort.WriteTimeout = -1;comm.Open();if (comm.IsOpen)comm.DataReceived += new Comm.EventHandle(comm_DataReceived); 发送指令： / / 发卡到机口/ private void SendCardToOut()is_read_card = false;sendCardToOut = true;byte send = 0x02, 0x46, 0x43, 0x34, 0x03, 0x30 ;if (comm.IsOpen)comm.WritePort(send, 0, send.Length); 收到指令，并解析： void comm_DataReceived(byte readBuffer1)/log.Info(HexCon.ByteToString(readBuffer);if (readBuffer1.Length = 1)receive = HealCardClass.ByteToString(readBuffer1);string str = 06;if (string.Equals(receive.Trim(), str, StringComparison.CurrentCultureIgnoreCase)tryif (is_read_card)byte send = new byte1;send0 = 0x05;comm.WritePort(send, 0, send.Length);Thread.Sleep(500);comm.DataReceived -= new Comm.EventHandle(comm_DataReceived);InitReadComm();if (sendCardToOut)byte send = new byte1;send0 = 0x05;comm.WritePort(send, 0, send.Length); readComm.DataReceived -= new Comm.EventHandle(readComm_DataReceived);readComm.Close(); log.Info(发卡完成！);lblMsg.Text = 发卡成