public static List<COMPortInfo> GetCOMPortsInfo()
{
List<COMPortInfo> comPortInfoList = new List<COMPortInfo>();
ConnectionOptions options = ProcessConnection.ProcessConnectionOptions();
ManagementScope connectionScope = ProcessConnection.ConnectionScope(Environment.MachineName, options, @"\root\CIMV2");
ObjectQuery objectQuery = new ObjectQuery("SELECT * FROM Win32_PnPEntity WHERE ConfigManagerErrorCode = 0");
ManagementObjectSearcher comPortSearcher = new ManagementObjectSearcher(connectionScope, objectQuery);
using (comPortSearcher) {
string caption = null;
foreach (ManagementObject obj in comPortSearcher.Get()) {
if (obj != null) {
object captionObj = obj["Caption"];
if (captionObj != null) {
caption = captionObj.ToString();
if (caption.Contains("(COM")) {
COMPortInfo comPortInfo = new COMPortInfo();
comPortInfo.Name = caption.Substring(caption.LastIndexOf("(COM")).Replace("(", string.Empty).Replace(")",
string.Empty);
comPortInfo.Description = caption;
comPortInfoList.Add(comPortInfo);
}
}
}
}
}
return comPortInfoList;
}
public async Task Open(SerialEnum serialType)
{
if (Status == SerialPortStatus.Initialled)
{
Stopwatch sw = new Stopwatch();
sw.Start();
Status = SerialPortStatus.Opening;
var dis = SerialPort.GetPortNames();
if (!dis.Any())
{
return;
}
foreach (COMPortInfo comPort in COMPortInfo.GetCOMPortsInfo())
{
Console.WriteLine($"{comPort.Name} – {comPort.Description}");
if (comPort.Description.IndexOf("USB", StringComparison.Ordinal) == -1 &&
comPort.Description.IndexOf("Virtual Serial Port", StringComparison.Ordinal) == -1)
{
continue;
}
try
{
var portName = comPort.Name.Split("->".ToCharArray())[0];
LogFactory.Create().Info("portname:" + portName);
SerialPort = new SerialPort(portName);
if (SerialPort == null)
{
continue;
}
SerialPort.WriteTimeout = 50;
SerialPort.ReadTimeout = 50;
SerialPort.BaudRate = 9600;
SerialPort.Parity = Parity.None;
SerialPort.StopBits = StopBits.One;
SerialPort.DataBits = 8;
SerialPort.Handshake = Handshake.None;
SerialPort.WriteBufferSize = 1024;
SerialPort.ReadBufferSize = 1024;
SerialPort.DataReceived += SerialPort_DataReceived;
SerialPort.ErrorReceived += SerialPort_ErrorReceived;
_readCancellationTokenSource = new CancellationTokenSource();
SerialPort.Open();
Send(generatePingBytesByType(serialType), CancellationToken.None);
var cancellationToken = new CancellationTokenSource(1000).Token;
completionSource = new TaskCompletionSource <byte[]>();
using (cancellationToken.Register(() => completionSource.TrySetResult(new byte[] { })))
{
var x = await completionSource.Task;
var ret = Shunxi.Common.Utility.Common.BytesToString(x);
if (!string.IsNullOrEmpty(ret) && ret.Length > 10)
{
Status = SerialPortStatus.Opened;
LogFactory.Create().Info($"Serial Port {portName} Opened");
break;
}
Status = SerialPortStatus.Initialled;
SerialPort.DataReceived -= SerialPort_DataReceived;
SerialPort.ErrorReceived -= SerialPort_ErrorReceived;
SerialPort.Close();
SerialPort.Dispose();
SerialPort = null;
}
}
catch (Exception ex)
{
if (SerialPort != null)
{
SerialPort.DataReceived -= SerialPort_DataReceived;
SerialPort.ErrorReceived -= SerialPort_ErrorReceived;
}
Status = SerialPortStatus.Initialled;
SerialPort?.Close();
SerialPort?.Dispose();
LogFactory.Create().Info("port open error" + ex.Message);
}
}
sw.Stop();
LogFactory.Create().Info("open port consume time " + sw.ElapsedMilliseconds);
}
}
