/// <summary>
/// Synchronously write a packet of bytes to the device.
/// </summary>
/// <param name="data">Packet to write to device.</param>
private void WriteSync(byte[] data)
{
Log.Trace("WriteSync({0}): ", data.Length);
Log.WriteArray(LogLevel.Trace, data);
if (!_deviceAvailable)
throw new InvalidOperationException("Device not available");
WaitHandle waitHandle = new ManualResetEvent(false);
SafeHandle safeWaitHandle = waitHandle.SafeWaitHandle;
var waitHandles = new WaitHandle[] { waitHandle };
try
{
int lastError;
var success = false;
safeWaitHandle.DangerousAddRef(ref success);
if (!success)
throw new InvalidOperationException("Failed to initialize safe wait handle");
var overlapped = new DeviceIoOverlapped();
overlapped.ClearAndSetEvent(safeWaitHandle.DangerousGetHandle());
int bytesWritten;
var writeDevice = WriteFile(_writeHandle, data, data.Length, out bytesWritten, overlapped.Overlapped);
lastError = Marshal.GetLastWin32Error();
if (writeDevice)
return;
if (lastError != ErrorSuccess && lastError != ErrorIoPending)
throw new Win32Exception(lastError);
var handle = WaitHandle.WaitAny(waitHandles, WriteSyncTimeout, false);
if (handle == ErrorWaitTimeout)
throw new TimeoutException("Timeout trying to write data to device");
if (handle != 0)
throw new InvalidOperationException(String.Format("Invalid wait handle return: {0}", handle));
var getOverlapped = GetOverlappedResult(_writeHandle, overlapped.Overlapped, out bytesWritten, true);
lastError = Marshal.GetLastWin32Error();
if (!getOverlapped && lastError != ErrorSuccess)
throw new Win32Exception(lastError);
Thread.Sleep(PacketTimeout);
}
catch
{
if (_writeHandle != null)
CancelIo(_writeHandle);
throw;
}
finally
{
safeWaitHandle.DangerousRelease();
waitHandle.Close();
}
}
/// <summary>
/// Device read thread method.
/// </summary>
private void ReadThread()
{
byte[] packetBytes;
WaitHandle waitHandle = new ManualResetEvent(false);
SafeHandle safeWaitHandle = waitHandle.SafeWaitHandle;
var waitHandles = new WaitHandle[] { waitHandle, _stopReadThread };
var deviceBufferPtr = IntPtr.Zero;
var success = false;
safeWaitHandle.DangerousAddRef(ref success);
if (!success)
throw new InvalidOperationException("Failed to initialize safe wait handle");
try
{
var dangerousWaitHandle = safeWaitHandle.DangerousGetHandle();
var overlapped = new DeviceIoOverlapped();
overlapped.ClearAndSetEvent(dangerousWaitHandle);
deviceBufferPtr = Marshal.AllocHGlobal(DeviceBufferSize);
while (_readThreadMode != ReadThreadMode.Stop)
{
int lastError;
int bytesRead;
var readDevice = ReadFile(_readHandle, deviceBufferPtr, DeviceBufferSize, out bytesRead,
overlapped.Overlapped);
lastError = Marshal.GetLastWin32Error();
switch (_readThreadMode)
{
case ReadThreadMode.Receiving:
FireStateChanged(new StateChangedEventArgs(RunningState.Started, ReceivingState.Receiving));
break;
case ReadThreadMode.Learning:
FireStateChanged(new StateChangedEventArgs(RunningState.Started, ReceivingState.Learning));
break;
}
if (!readDevice)
{
if (lastError != ErrorSuccess && lastError != ErrorIoPending)
throw new Win32Exception(lastError);
while (true)
{
var handle = WaitHandle.WaitAny(waitHandles, 2*PacketTimeout, false);
if (handle == ErrorWaitTimeout)
continue;
if (handle == 0)
break;
if (handle == 1)
throw new ThreadInterruptedException("Read thread stopping by request");
throw new InvalidOperationException(String.Format("Invalid wait handle return: {0}", handle));
}
var getOverlapped = GetOverlappedResult(_readHandle, overlapped.Overlapped, out bytesRead, true);
lastError = Marshal.GetLastWin32Error();
if (!getOverlapped && lastError != ErrorSuccess)
throw new Win32Exception(lastError);
}
if (bytesRead == 0)
continue;
packetBytes = new byte[bytesRead];
Marshal.Copy(deviceBufferPtr, packetBytes, 0, bytesRead);
Log.Trace("Received bytes ({0}): ", bytesRead);
Log.WriteArray(LogLevel.Trace, packetBytes);
int[] timingData = null;
if (_decodeCarry != 0 || packetBytes[0] >= 0x81 && packetBytes[0] <= 0x9E)
{
timingData = GetTimingDataFromPacket(packetBytes);
}
else
{
double firmware = 0.0;
var indexOfFF = Array.IndexOf(packetBytes, (byte) 0xFF);
while (indexOfFF != -1)
{
if (packetBytes.Length > indexOfFF + 2 && packetBytes[indexOfFF + 1] == 0x0B)
// FF 0B XY - Firmware X.Y00
{
byte b1 = packetBytes[indexOfFF + 2];
firmware += (b1 >> 4) + (0.1*(b1 & 0x0F));
Log.Debug("Firmware: {0}", firmware);
}
if (packetBytes.Length > indexOfFF + 2 && packetBytes[indexOfFF + 1] == 0x1B)
// FF 1B XY - Firmware 0.0XY
{
byte b1 = packetBytes[indexOfFF + 2];
firmware += (0.01*(b1 >> 4)) + (0.001*(b1 & 0x0F));
Log.Debug("Firmware: {0}", firmware);
}
if (packetBytes.Length > indexOfFF + 1)
indexOfFF = Array.IndexOf(packetBytes, (byte) 0xFF, indexOfFF + 1);
else
break;
}
}
switch (_readThreadMode)
{
case ReadThreadMode.Receiving:
{
var code = new IRCode(timingData);
code.FinalizeData();
FireCodeReceived(new CodeReceivedEventArgs(code));
break;
}
case ReadThreadMode.Learning:
{
if (timingData == null)
{
if (_learningCode.TimingData.Length > 0)
{
_learningCode = null;
_readThreadMode = ReadThreadMode.LearningFailed;
}
break;
}
if (_learningCode == null)
throw new InvalidOperationException(
"Learning not initialised correctly, _learningCode object is null");
_learningCode.AddTimingData(timingData);
// Example: 9F 01 02 9F 15 00 BE 80
var indexOf9F = Array.IndexOf(packetBytes, (byte) 0x9F);
while (indexOf9F != -1)
{
if (packetBytes.Length > indexOf9F + 3 && packetBytes[indexOf9F + 1] == 0x15)
// 9F 15 XX XX
{
byte b1 = packetBytes[indexOf9F + 2];
byte b2 = packetBytes[indexOf9F + 3];
int onTime, onCount;
GetIrCodeLengths(_learningCode, out onTime, out onCount);
double carrierCount = (b1*256) + b2;
if (carrierCount/onCount < 2.0)
{
_learningCode.Carrier = IRCode.CarrierFrequencyDCMode;
}
else
{
double carrier = 1000000*carrierCount/onTime;
// TODO: Double-Check this calculation.
if (carrier > 32000)
{
_learningCode.Carrier = (int) (carrier + 0.05*carrier - 0.666667);
// was: _learningCode.Carrier = (int) (carrier + 0.05*carrier - 32000/48000);
}
else
{
_learningCode.Carrier = (int) carrier;
}
}
_readThreadMode = ReadThreadMode.LearningDone;
break;
}
if (packetBytes.Length > indexOf9F + 1)
{
indexOf9F = Array.IndexOf(packetBytes, (byte) 0x9F, indexOf9F + 1);
}
else
{
_readThreadMode = ReadThreadMode.LearningFailed;
break;
}
}
break;
}
}
}
FireStateChanged(new StateChangedEventArgs(RunningState.Stopping));
}
catch (ThreadInterruptedException ex)
{
Log.Info(ex);
if (_readHandle != null)
CancelIo(_readHandle);
}
catch (Exception ex)
{
Log.Warn(ex);
if (_readHandle != null)
CancelIo(_readHandle);
}
finally
{
if (deviceBufferPtr != IntPtr.Zero)
Marshal.FreeHGlobal(deviceBufferPtr);
safeWaitHandle.DangerousRelease();
waitHandle.Close();
}
Log.Debug("Read Thread Ended");
FireStateChanged(new StateChangedEventArgs(RunningState.Stopped));
}
private void IoControl(IoCtrl ioControlCode, IntPtr inBuffer, int inBufferSize, IntPtr outBuffer,
int outBufferSize,
out int bytesReturned)
{
if (!_deviceAvailable)
throw new InvalidOperationException("Device not available");
using (WaitHandle waitHandle = new ManualResetEvent(false))
{
SafeHandle safeWaitHandle = waitHandle.SafeWaitHandle;
var success = false;
safeWaitHandle.DangerousAddRef(ref success);
if (!success)
throw new InvalidOperationException("Failed to initialize safe wait handle");
try
{
var dangerousWaitHandle = safeWaitHandle.DangerousGetHandle();
var overlapped = new DeviceIoOverlapped();
overlapped.ClearAndSetEvent(dangerousWaitHandle);
var deviceIoControl = DeviceIoControl(_eHomeHandle, ioControlCode, inBuffer, inBufferSize,
outBuffer,
outBufferSize, out bytesReturned, overlapped.Overlapped);
var lastError = Marshal.GetLastWin32Error();
if (deviceIoControl) return;
// Now also handles Operation Aborted and Bad Command errors.
switch (lastError)
{
case ErrorIoPending:
waitHandle.WaitOne();
var getOverlapped = GetOverlappedResult(_eHomeHandle, overlapped.Overlapped,
out bytesReturned, false);
lastError = Marshal.GetLastWin32Error();
if (!getOverlapped)
{
if (lastError == ErrorBadCommand)
goto case ErrorBadCommand;
if (lastError == ErrorOperationAborted)
goto case ErrorOperationAborted;
throw new Win32Exception(lastError);
}
break;
case ErrorBadCommand:
if (Thread.CurrentThread == _readThread)
//Cause receive restart
_deviceReceiveStarted = false;
break;
case ErrorOperationAborted:
if (Thread.CurrentThread != _readThread)
throw new Win32Exception(lastError);
//Cause receive restart
_deviceReceiveStarted = false;
break;
default:
throw new Win32Exception(lastError);
}
}
catch
{
Log.Warn("IoControl: something went bad with StructToPtr or the other way around");
if (_eHomeHandle != null)
CancelIo(_eHomeHandle);
throw;
}
finally
{
safeWaitHandle.DangerousRelease();
}
}
}