C# 读COM PORT
参照了MSDN的示例：
https://msdn.microsoft.com/en-us/library/system.io.ports.serialport.aspx
还是不工作，需要加这一行代码：
mySerialPort.DtrEnable = true;
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DtrEnable属性的描述：
Gets or sets a value that enables the Data Terminal Ready (DTR) signal during serial communication.
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demo代码：
public class COMPortListener
{ private static ILog logger = LogManager.GetLogger(typeof (COMPortListener));
#region single instance
private COMPortListener()
{
}
static COMPortListener()
{
}
private static COMPortListener _instance = new COMPortListener();
public static COMPortListener Instance { get { return _instance; } }
#endregion
public Action<string> OnDataReceived;
public void SerialPortListenAsync()
{
if (OnDataReceived == null)
{
throw new InvalidOperationException("must set callback [OnDataReceived] first.");
}
Task.Run(() =>
{
var mySerialPort = new SerialPort(ConfigurationManager.AppSettings["COM_PORT"]);
mySerialPort.BaudRate = 9600;
mySerialPort.Parity = Parity.None;
mySerialPort.StopBits = StopBits.One;
mySerialPort.DataBits = 8;
mySerialPort.Handshake = Handshake.None;
mySerialPort.RtsEnable = true;
mySerialPort.DtrEnable = true;
mySerialPort.ReadTimeout = 500;
mySerialPort.ErrorReceived += (sender, args) =>
{
Console.WriteLine("######error");
Console.WriteLine(args.EventType);
};
mySerialPort.Open();
logger.Info("####COM PORT opened...");
while (true)
{
try
{
string message = mySerialPort.ReadLine();
OnDataReceived(message);
Task.Delay(500);
}
catch (TimeoutException ex)
{
//do nothing
}
}
});
}
}
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