423 lines
13 KiB
C#
423 lines
13 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.IO.Ports;
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using System.Threading;
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using System.Threading.Tasks;
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using DTS.Common.DASResource;
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using DTS.Common.Interface.Connection;
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using DTS.Common.Utilities.Logging;
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namespace DTS.Common.WINUSBConnection
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{
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public class UsbRecAsyncResult : IAsyncResult
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{
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public object AsyncState { get; set; }
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public WaitHandle AsyncWaitHandle { get; set; }
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public bool CompletedSynchronously { get; set; }
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public bool IsCompleted { get; set; }
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public byte[] buffer { get; set; }
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public int Offset { get; set; }
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public int Size { get; set; }
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}
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public class CDCUSBConnection : IConnection
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{
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/// <summary>
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/// returns true if the das has been soft disconnected or not
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/// </summary>
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public bool IsSoftDisconnected { get; private set; } = false;
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/// <summary>
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/// connect the das
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/// :note does nothing for CDCUSB, we don't have a soft disconnect option
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/// </summary>
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public void SoftConnect()
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{
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}
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/// <summary>
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/// disconnect the das
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/// :note does nothing for CDCUSB, we don't have a soft disconnect option
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/// </summary>
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public void SoftDisconnect()
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{
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}
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void IConnection.KeepAliveErrorReceived()
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{
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}
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public string GetConnectionData() { return ""; }
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public const int DTS_VENDOR_ID = 0x1CB9;
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public const string DTS_VENDOR_ID_STR = "VID_1CB9";
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private const string DTS_TSR2_CDCUSB_PRODUCT_ID_STR = "PID_001A";
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private static List<string> _regKeys;
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private static readonly object KEY_LOCK = new object();
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public static IList<string> RegKeys
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{
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get
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{
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lock (KEY_LOCK)
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{
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if (null != _regKeys) return _regKeys;
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_regKeys = new List<string>();
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ReadTSR2CDCUSBRegKeys();
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}
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return _regKeys;
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}
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}
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/// <summary>
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/// Searches the system registry for a key that corresponds to the Peak CAN USB
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/// vendor and product ID.
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/// </summary>
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internal static void ReadTSR2CDCUSBRegKeys()
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{
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var ourKey = ReadOurNameRegistryKey();
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if (null == ourKey) { return; }
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foreach (var subKey in ourKey.GetSubKeyNames())
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{
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RegKeys.Add(subKey);
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}
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}
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internal static Microsoft.Win32.RegistryKey ReadOurNameRegistryKey()
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{
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var key = Microsoft.Win32.Registry.LocalMachine;
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const string ourName = @"SYSTEM\CurrentControlSet\Enum\USB\" + DTS_VENDOR_ID_STR + "&" + DTS_TSR2_CDCUSB_PRODUCT_ID_STR;
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key = key.OpenSubKey(ourName);
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return key;
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}
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/// <summary>
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/// current upload rate in b/s
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/// </summary>
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/// <returns></returns>
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public double GetCurrentUploadRate() { return 0D; }
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/// <summary>
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/// current download rate in b/s
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/// </summary>
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/// <returns></returns>
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public double GetCurrentDownloadRate() { return 0D; }
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public event EventHandler OnDisconnected;
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private int _baudRate = 9600;
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private Parity _parity = Parity.None;
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private StopBits _stopBits = StopBits.One;
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private const int DATA_BITS = 8;
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public string PortName { get; set; }
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private readonly SerialPort _comPort = new SerialPort();
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private string _devicePathname;
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protected bool _Connected;
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protected volatile bool Disposed;
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protected volatile bool Disposing;
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public bool Connected => _Connected;
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public string ConnectString => _devicePathname;
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public System.Net.Sockets.SocketFlags Flags { get; set; }
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private class AUSBRecFix
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{
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public readonly AsyncCallback Callback;
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public readonly UsbRecAsyncResult USBResult;
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public AUSBRecFix(AsyncCallback callback, UsbRecAsyncResult usbResult)
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{
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Callback = callback;
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USBResult = usbResult;
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}
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}
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public CDCUSBConnection()
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{
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Disposed = false;
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Disposing = false;
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_Connected = false;
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}
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~CDCUSBConnection()
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{
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Dispose(false);
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}
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public void Dispose()
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{
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Dispose(true);
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// Use SupressFinalize in case a subclass
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// of this type implements a finalizer.
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GC.SuppressFinalize(this);
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}
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protected virtual void Dispose(bool disposing)
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{
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// make sure we're not already disposed
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if (Disposed)
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return;
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if (disposing)
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{
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Disposing = true;
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}
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if (_comPort.IsOpen)
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{
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_comPort.Close();
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_Connected = false;
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}
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Disposed = true;
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Disposing = false;
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}
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public void Create(string connectString)
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{
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//Create(connectString); - this is recursive!
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}
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public void Create(string connectString, string hostIPAddress)
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{
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foreach (var regKey in RegKeys)
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{
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if (!connectString.Contains(regKey.ToLower())) continue;
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var ourKey = ReadOurNameRegistryKey();
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ourKey = ourKey.OpenSubKey(regKey);
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ourKey = ourKey?.OpenSubKey("Device Parameters");
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var value = (string)ourKey?.GetValue("PortName");
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PortName = value;
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break;
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}
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_devicePathname = connectString;
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}
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#region Disconnect
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public IAsyncResult BeginDisconnect(bool reuseSocket,
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AsyncCallback cb,
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Object state)
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{
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var rar = new UsbRecAsyncResult
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{
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AsyncState = state,
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AsyncWaitHandle = new ManualResetEvent(false),
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CompletedSynchronously = false,
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IsCompleted = false,
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buffer = null,
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Offset = 0,
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Size = 0
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};
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if (!ThreadPool.QueueUserWorkItem(NetCallbackFix, new AUSBRecFix(cb, rar)))
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{
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throw new Exception(DASResource.Strings.CDCUSBConnection_BeginDisconnect_Err1);
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}
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return rar;
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}
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public void EndDisconnect(IAsyncResult ar)
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{
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var rar = ar as UsbRecAsyncResult;
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if (_comPort.IsOpen)
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{
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_comPort.Close();
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_Connected = false;
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_comPort.Dispose();
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}
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((ManualResetEvent)rar?.AsyncWaitHandle)?.Set();
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}
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#endregion
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#region Accept
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public IAsyncResult BeginAccept(AsyncCallback callback,
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object state)
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{
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throw new NotSupportedException();
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}
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public IConnection EndAccept(IAsyncResult asyncResult)
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{
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throw new NotSupportedException();
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}
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#endregion
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#region Listen
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public void Listen(int backlog)
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{
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throw new NotSupportedException();
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}
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#endregion
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#region Bind
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public void Bind(int port)
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{
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throw new NotSupportedException();
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}
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#endregion
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#region Connect
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public IAsyncResult BeginConnect(AsyncCallback cb, object state)
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{
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var rar = new UsbRecAsyncResult
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{
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AsyncState = state,
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AsyncWaitHandle = new ManualResetEvent(false),
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CompletedSynchronously = false,
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IsCompleted = false,
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buffer = null,
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Offset = 0,
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Size = 0
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};
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if (!ThreadPool.QueueUserWorkItem(NetCallbackFix, new AUSBRecFix(cb, rar)))
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{
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// "USBConnection.BeginConnect: Unable to enqueue function"
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throw new Exception(DASResource.Strings.CDCUSBConnection_BeginConnect_Err1);
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}
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return rar;
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}
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private void NetCallbackFix(object obj)
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{
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try
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{
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if (Disposed) return;
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var ausbrf = obj as AUSBRecFix;
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ausbrf?.Callback(ausbrf.USBResult);
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}
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catch (Exception ex)
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{
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APILogger.Log(@"PcanUsbConnection.NetCallbackFix: Exception " + ex.Message + @" " + ex.StackTrace);
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}
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}
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public void EndConnect(IAsyncResult ar)
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{
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var rar = ar as UsbRecAsyncResult;
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if (_comPort.IsOpen)
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{
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_comPort.Close();
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_Connected = false;
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}
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_comPort.BaudRate = _baudRate;
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_comPort.DataBits = DATA_BITS;
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_comPort.StopBits = _stopBits;
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_comPort.Parity = _parity;
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_comPort.PortName = PortName;
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try
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{
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_comPort.Open();
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}
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catch (Exception)
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{
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_Connected = false;
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}
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_Connected = true;
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((ManualResetEvent)rar?.AsyncWaitHandle)?.Set();
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}
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#endregion
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#region Send
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public IAsyncResult BeginSend(byte[] buffer, int offset, int size,
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AsyncCallback cb, object state)
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{
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var rar = new UsbRecAsyncResult
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{
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AsyncState = state,
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AsyncWaitHandle = new ManualResetEvent(false),
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CompletedSynchronously = false,
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IsCompleted = false,
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buffer = buffer,
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Offset = offset,
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Size = size
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};
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if (!ThreadPool.QueueUserWorkItem(NetCallbackFix, new AUSBRecFix(cb, rar)))
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{
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// "WINUSBConnection.BeginSend: Unable to enqueue function"
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throw new Exception(DASResource.Strings.CDCUSBConnection_BeginSend_Err1);
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}
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return rar;
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}
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public int EndSend(IAsyncResult ar)
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{
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var rar = ar as UsbRecAsyncResult;
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if (null == rar)
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{
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return 0;
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}
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_comPort.Write(rar.buffer, 0, rar.Size);
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((ManualResetEvent)rar.AsyncWaitHandle).Set();
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return rar.Size;
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}
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public Task<int> SendAsync(byte[] sendBuffer, int bufferStartOffset, int bufferSizeToSend)
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{
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return Task<int>.Factory.FromAsync(
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(callback, state) => BeginSend(sendBuffer, bufferStartOffset, bufferSizeToSend, callback, state),
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EndSend, state: null
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);
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}
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#endregion
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#region Receive
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public IAsyncResult BeginReceive(byte[] buffer, int offset, int size,
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AsyncCallback cb, object state)
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{
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var rar = new UsbRecAsyncResult
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{
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AsyncState = state,
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AsyncWaitHandle = new ManualResetEvent(false),
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CompletedSynchronously = false,
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IsCompleted = false,
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buffer = buffer,
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Offset = offset,
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Size = size
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};
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if (!ThreadPool.QueueUserWorkItem(NetCallbackFix, new AUSBRecFix(cb, rar)))
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{
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// "WINUSBConnection.BeginReceive: Unable to enqueue function"
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throw new Exception(DASResource.Strings.CDCUSBConnection_BeginReceive_Err1);
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}
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return rar;
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}
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//private DateTime _lastHeartbeat;
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public int EndReceive(IAsyncResult ar)
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{
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var rar = ar as UsbRecAsyncResult;
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int bytesRead;
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do
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{
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bytesRead = _comPort.Read(rar.buffer, 0, rar.Size);
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if (0 == bytesRead)
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{
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Thread.Sleep(1);
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}
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} while (0 == bytesRead);
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((ManualResetEvent)rar.AsyncWaitHandle).Set();
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return bytesRead;
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}
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#endregion
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}
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}
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