private bool WriteData(byte[] data, int timeout) { if (_deviceCapabilities.OutputReportByteLength <= 0) { return(false); } var buffer = CreateOutputBuffer(); uint bytesWritten = 0; Array.Copy(data, 0, buffer, 0, Math.Min(data.Length, _deviceCapabilities.OutputReportByteLength)); if (_deviceWriteMode == DeviceMode.Overlapped) { var security = new NativeMethods.SECURITY_ATTRIBUTES(); var overlapped = new NativeMethods.NativeOverlapped(); var overlapTimeout = timeout <= 0 ? NativeMethods.WAIT_INFINITE : timeout; security.lpSecurityDescriptor = IntPtr.Zero; security.bInheritHandle = true; security.nLength = Marshal.SizeOf(security); overlapped.OffsetLow = 0; overlapped.OffsetHigh = 0; overlapped.EventHandle = NativeMethods.CreateEvent(ref security, Convert.ToInt32(false), Convert.ToInt32(true), ""); try { NativeMethods.WriteFile(Handle, buffer, (uint)buffer.Length, out bytesWritten, ref overlapped); } catch { return(false); } var result = NativeMethods.WaitForSingleObject(overlapped.EventHandle, overlapTimeout); switch (result) { case NativeMethods.WAIT_OBJECT_0: return(true); case NativeMethods.WAIT_TIMEOUT: return(false); case NativeMethods.WAIT_FAILED: return(false); default: return(false); } } else { try { var overlapped = new NativeMethods.NativeOverlapped(); return(NativeMethods.WriteFile(Handle, buffer, (uint)buffer.Length, out bytesWritten, ref overlapped)); } catch { return(false); } } }
protected HidDeviceData ReadData(int timeout) { var buffer = new byte[] { }; var status = HidDeviceData.ReadStatus.NoDataRead; if (_deviceCapabilities.InputReportByteLength > 0) { uint bytesRead = 0; buffer = CreateInputBuffer(); if (_deviceReadMode == DeviceMode.Overlapped) { var security = new NativeMethods.SECURITY_ATTRIBUTES(); var overlapped = new NativeMethods.NativeOverlapped(); var overlapTimeout = timeout <= 0 ? NativeMethods.WAIT_INFINITE : timeout; security.lpSecurityDescriptor = IntPtr.Zero; security.bInheritHandle = true; security.nLength = Marshal.SizeOf(security); overlapped.OffsetLow = 0; overlapped.OffsetHigh = 0; overlapped.EventHandle = NativeMethods.CreateEvent(ref security, Convert.ToInt32(false), Convert.ToInt32(true), string.Empty); try { NativeMethods.ReadFile(Handle, buffer, (uint)buffer.Length, out bytesRead, ref overlapped); var result = NativeMethods.WaitForSingleObject(overlapped.EventHandle, overlapTimeout); switch (result) { case NativeMethods.WAIT_OBJECT_0: status = HidDeviceData.ReadStatus.Success; break; case NativeMethods.WAIT_TIMEOUT: status = HidDeviceData.ReadStatus.WaitTimedOut; buffer = new byte[] { }; break; case NativeMethods.WAIT_FAILED: status = HidDeviceData.ReadStatus.WaitFail; buffer = new byte[] { }; break; default: status = HidDeviceData.ReadStatus.NoDataRead; buffer = new byte[] { }; break; } } catch { status = HidDeviceData.ReadStatus.ReadError; } finally { CloseDeviceIO(overlapped.EventHandle); } } else { try { var overlapped = new NativeMethods.NativeOverlapped(); NativeMethods.ReadFile(Handle, buffer, (uint)buffer.Length, out bytesRead, ref overlapped); status = HidDeviceData.ReadStatus.Success; } catch { status = HidDeviceData.ReadStatus.ReadError; } } } return(new HidDeviceData(buffer, status)); }