private void OpenWiimoteDeviceHandle(string devicePath)
{
// open a read/write handle to our device using the DevicePath returned
mHandle = HIDImports.CreateFile(devicePath, FileAccess.ReadWrite, FileShare.ReadWrite, IntPtr.Zero, FileMode.Open, HIDImports.EFileAttributes.Overlapped, IntPtr.Zero);
// create an attributes struct and initialize the size
HIDImports.HIDD_ATTRIBUTES attrib = new HIDImports.HIDD_ATTRIBUTES();
attrib.Size = Marshal.SizeOf(attrib);
// get the attributes of the current device
if(HIDImports.HidD_GetAttributes(mHandle.DangerousGetHandle(), ref attrib))
{
// if the vendor and product IDs match up
if(attrib.VendorID == VID && attrib.ProductID == PID)
{
// create a nice .NET FileStream wrapping the handle above
mStream = new FileStream(mHandle, FileAccess.ReadWrite, REPORT_LENGTH, true);
// start an async read operation on it
BeginAsyncRead();
// read the calibration info from the controller
try
{
ReadWiimoteCalibration();
}
catch
{
// if we fail above, try the alternate HID writes
mAltWriteMethod = true;
ReadWiimoteCalibration();
}
// force a status check to get the state of any extensions plugged in at startup
GetStatus();
}
else
{
// otherwise this isn't the controller, so close up the file handle
mHandle.Close();
throw new WiimoteException("Attempted to open a non-Wiimote device.");
}
}
}
internal static void FindWiimote(WiimoteFoundDelegate wiimoteFound)
{
int index = 0;
bool found = false;
Guid guid;
SafeFileHandle mHandle;
// get the GUID of the HID class
HIDImports.HidD_GetHidGuid(out guid);
// get a handle to all devices that are part of the HID class
// Fun fact: DIGCF_PRESENT worked on my machine just fine. I reinstalled Vista, and now it no longer finds the Wiimote with that parameter enabled...
IntPtr hDevInfo = HIDImports.SetupDiGetClassDevs(ref guid, null, IntPtr.Zero, HIDImports.DIGCF_DEVICEINTERFACE);// | HIDImports.DIGCF_PRESENT);
// create a new interface data struct and initialize its size
HIDImports.SP_DEVICE_INTERFACE_DATA diData = new HIDImports.SP_DEVICE_INTERFACE_DATA();
diData.cbSize = Marshal.SizeOf(diData);
// get a device interface to a single device (enumerate all devices)
while(HIDImports.SetupDiEnumDeviceInterfaces(hDevInfo, IntPtr.Zero, ref guid, index, ref diData))
{
UInt32 size;
// get the buffer size for this device detail instance (returned in the size parameter)
HIDImports.SetupDiGetDeviceInterfaceDetail(hDevInfo, ref diData, IntPtr.Zero, 0, out size, IntPtr.Zero);
// create a detail struct and set its size
HIDImports.SP_DEVICE_INTERFACE_DETAIL_DATA diDetail = new HIDImports.SP_DEVICE_INTERFACE_DETAIL_DATA();
// yeah, yeah...well, see, on Win x86, cbSize must be 5 for some reason. On x64, apparently 8 is what it wants.
// someday I should figure this out. Thanks to Paul Miller on this...
diDetail.cbSize = (uint)(IntPtr.Size == 8 ? 8 : 5);
// actually get the detail struct
if(HIDImports.SetupDiGetDeviceInterfaceDetail(hDevInfo, ref diData, ref diDetail, size, out size, IntPtr.Zero))
{
//Debug.WriteLine(string.Format("{0}: {1} - {2}", index, diDetail.DevicePath, Marshal.GetLastWin32Error()));
// open a read/write handle to our device using the DevicePath returned
mHandle = HIDImports.CreateFile(diDetail.DevicePath, FileAccess.ReadWrite, FileShare.ReadWrite, IntPtr.Zero, FileMode.Open, HIDImports.EFileAttributes.Overlapped, IntPtr.Zero);
// create an attributes struct and initialize the size
HIDImports.HIDD_ATTRIBUTES attrib = new HIDImports.HIDD_ATTRIBUTES();
attrib.Size = Marshal.SizeOf(attrib);
// get the attributes of the current device
if(HIDImports.HidD_GetAttributes(mHandle.DangerousGetHandle(), ref attrib))
{
// if the vendor and product IDs match up
if(attrib.VendorID == VID && attrib.ProductID == PID)
{
found = true;
// fire the callback function...if the callee doesn't care about more Wiimotes, break out
if(!wiimoteFound(diDetail.DevicePath))
break;
}
}
mHandle.Close();
}
else
{
// failed to get the detail struct
throw new WiimoteException("SetupDiGetDeviceInterfaceDetail failed on index " + index);
}
// move to the next device
index++;
}
// clean up our list
HIDImports.SetupDiDestroyDeviceInfoList(hDevInfo);
// if we didn't find a Wiimote, throw an exception
if(!found)
throw new WiimoteNotFoundException("No Wiimotes found in HID device list.");
}