private bool TryReEnableDevice(string deviceInstanceId)
{
try
{
bool success;
Guid hidGuid = new Guid();
NativeMethods.HidD_GetHidGuid(ref hidGuid);
IntPtr deviceInfoSet = NativeMethods.SetupDiGetClassDevs(ref hidGuid, deviceInstanceId, 0,
NativeMethods.DIGCF_PRESENT | NativeMethods.DIGCF_DEVICEINTERFACE);
NativeMethods.SP_DEVINFO_DATA deviceInfoData = new NativeMethods.SP_DEVINFO_DATA();
deviceInfoData.cbSize = Marshal.SizeOf(deviceInfoData);
success = NativeMethods.SetupDiEnumDeviceInfo(deviceInfoSet, 0, ref deviceInfoData);
success = NativeMethods.SetupDiEnumDeviceInfo(deviceInfoSet, 1,
ref deviceInfoData); // Checks that we have a unique device
NativeMethods.SP_PROPCHANGE_PARAMS propChangeParams = new NativeMethods.SP_PROPCHANGE_PARAMS();
propChangeParams.classInstallHeader.cbSize = Marshal.SizeOf(propChangeParams.classInstallHeader);
propChangeParams.classInstallHeader.installFunction = NativeMethods.DIF_PROPERTYCHANGE;
propChangeParams.stateChange = NativeMethods.DICS_DISABLE;
propChangeParams.scope = NativeMethods.DICS_FLAG_GLOBAL;
propChangeParams.hwProfile = 0;
success = NativeMethods.SetupDiSetClassInstallParams(deviceInfoSet, ref deviceInfoData,
ref propChangeParams, Marshal.SizeOf(propChangeParams));
if (!success)
{
return(false);
}
success = NativeMethods.SetupDiCallClassInstaller(NativeMethods.DIF_PROPERTYCHANGE, deviceInfoSet,
ref deviceInfoData);
if (!success)
{
return(false);
}
propChangeParams.stateChange = NativeMethods.DICS_ENABLE;
success = NativeMethods.SetupDiSetClassInstallParams(deviceInfoSet, ref deviceInfoData,
ref propChangeParams, Marshal.SizeOf(propChangeParams));
if (!success)
{
return(false);
}
success = NativeMethods.SetupDiCallClassInstaller(NativeMethods.DIF_PROPERTYCHANGE, deviceInfoSet,
ref deviceInfoData);
if (!success)
{
return(false);
}
NativeMethods.SetupDiDestroyDeviceInfoList(deviceInfoSet);
return(true);
}
catch
{
return(false);
}
}
private static void CloseDeviceIO(IntPtr handle)
{
NativeMethods.CloseHandle(handle);
}
private 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 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(ReadHandle, 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; }
}
else
{
try
{
var overlapped = new NativeOverlapped();
NativeMethods.ReadFile(ReadHandle, buffer, (uint)buffer.Length, out bytesRead, ref overlapped);
status = HidDeviceData.ReadStatus.Success;
}
catch { status = HidDeviceData.ReadStatus.ReadError; }
}
}
return(new HidDeviceData(buffer, status));
}
