C＃ – 从串口缓冲区读取

我正在尝试从RS-232端口读取数据。 有没有人有一个如何从端口/缓冲区获取数据的例子，并确保我拥有所有数据，因为它可以是多行数据。

我只是按如下方式阅读？

string Rxstring = port.ReadLine(); Console.WriteLine(Rxstring); 

Answer 1

试试这个：

 using System.IO.Ports; ... private SerialPort port = new SerialPort("COM1", 9600, Parity.None, 8, StopBits.One); Console.WriteLine(port.ReadExisting()); 

详细信息可以在Coad的代码中找到。

Answer 2

问：如何从端口/缓冲区获取日期，或从连接的设备输入数据。 并确保您拥有所有数据。

答：我与.net串口类驱动程序进行了广泛的合作，我的任务是创建可靠，健壮的代码。 这意味着被测连接的设备必须运行并且不会在很长一段时间内失败。 串口可以AND确实丢失数据！ 别忘了。

 //from top of the head; using System.Port.IO; using System.Port; private class mywindowsForm: Form { StringBuilder sbReceived = new StringBuilder(); string Received = string.Empty; int byteCOUNT = 0; System.Windows.Timers.Timer serialTimer; //Default constructor myWindowsForm() { //assume that you clicked and dragged serial port in serialPort1 = new SerialPort();//create new serial port instance serialPort1.Baud = 9600; serialPort1.DataReceived+= //serial port timer serialTimer = new System.Windows.Timers.Timer(500);//set to 500ms time delay serialTimer.Elapsed+= } void serialPort1_DataReceived(object sender, SerialDataReceivedEventArgs e) { //serial port has detected input data //however, we only want to get serial data so, if(e.EventType !=SerialData.Chars) return; //good design practice dictates that we have an event handler that we invoke this.BeginInvoke(new eventhandler(AddReceive));//beginInvoke is designed to deal with asynchronous processes like serial port data. } private void AddReceive(object s, EventArg e) { byteCOUNT=serialPort1.BytesToRead;//count the number of bytes in RX buffer if(byteCOUNT > 0) { string ST = serialPort1.ReadTo("\n");//lets get one line at a time sbReceived.Append(ST);//add whatever has been RX'd to our container. serialPort1.Interval =100; serialPort1.Start();//to be sure we have all data, check to see for stragglers. } } void serialTimer(object Sender, TimerElapsedEventArgs e) { serialTimer.Stop(); this.BeginInvoke(new EventHandler(ReadData)); } void ReadData(object Sender, EventArgs e) { //parse output for required data and output to terminal display (build one using rich text box) Received = sbReceived.ToString(); //and if we have ANY MORE incoming data left over in serial buffer if(Received.Length > 0) { //your data } } } 

这应该足以让你开始。 这是多年在c＃中创建自定义终端仿真器的结果。 还有其他事情可以做，特别是如果您需要大量的i / o数据来设置与设备的握手。 你必须让设备以设备满意的速度处理。 在需要传输较大数据的情况下，考虑设置一个简单的数据包传递协议和命令信号量构造 – 或者使用控制器/设备设计用于的定义协议。