internal static HidDevice Open(string devicePath)
{
IntPtr handle = Kernel32.CreateFile(
devicePath,
(uint)FileAccess.Read,
FileShare.ReadWrite,
IntPtr.Zero,
FileMode.Open,
FileAttributes.Device,
IntPtr.Zero);
if (handle != Kernel32.InvalidHandleValue)
{
Hid.DeviceAttributes attributes;
if (Hid.HidD_GetAttributes(handle, out attributes))
{
return(new HidDevice(
handle,
devicePath,
attributes.VendorId,
attributes.ProductId,
attributes.VersionNumber));
}
// If we could not get the hid attributes,
// then what we opened was not a hid device,
// we need to close the handle nonetheless.
Kernel32.CloseHandle(handle);
}
throw new Exception();
}
// Use Open to get device objects
private HidDevice(IntPtr handle, string devicePath, int vendorId, int productId, int versionNumber)
{
this.handle = handle;
DevicePath = devicePath;
VendorId = vendorId;
ProductId = productId;
VersionNumber = versionNumber;
Hid.HidD_GetPreparsedData(handle, out preparsedData);
}
public static void Initialize(IntPtr windowHandle)
{
// Initialize device event dispatcher.
Guid hidClassGuid;
Hid.HidD_GetHidGuid(out hidClassGuid);
deviceEventNotifier = new DeviceEventNotifier(windowHandle, hidClassGuid);
// Register for device removal/arrival events so we can keep
// track of the currently attached devices of interest.
deviceEventNotifier.DeviceArrival += DeviceAdded;
deviceEventNotifier.DeviceRemoval += DeviceRemoved;
// Open all devices we can find for now.
devices = new Dictionary <string, HidDevice>();
var devs = HidDevice.GetDevices(vendorId, productIds);
foreach (var dev in devs)
{
devices.Add(dev.DevicePath.ToUpper(), dev);
}
}
public static void Init(IntPtr windowHandle, params LogitechKeyboardType[] keyboardsToListenFor)
{
KeyboardsToListenFor = keyboardsToListenFor;
// Initialize device event dispatcher.
Guid hidClassGuid;
Hid.HidD_GetHidGuid(out hidClassGuid);
deviceEventNotifier = new DeviceEventNotifier(windowHandle, hidClassGuid);
// Register for device removal/arrival events so we can keep
// track of the currently attached devices of interest.
deviceEventNotifier.DeviceArrival += DeviceAdded;
deviceEventNotifier.DeviceRemoval += DeviceRemoved;
devices = new List <LogitechKeyboard>();
// Open all devices we can find for now.
var devs = HidDevice.Open(VENDOR_ID, keyboardsToListenFor.Select(d => d.ProductID));
foreach (var dev in devs)
{
devices.Add(new LogitechKeyboard(dev, keyboardsToListenFor.Where(k => k.ProductID == dev.ProductId).First()));
}
}
internal static List <HidDevice> Open(int vendorId, IEnumerable <int> productIds)
{
// Obtain system-defined GUID for HIDClass devices.
Guid hidClassGuid;
Hid.HidD_GetHidGuid(out hidClassGuid);
var deviceList = new List <HidDevice>();
// Obtain handle to an opaque device-information-set
// describing device interface supported by all HID
// collections currently installed in the system.
IntPtr deviceInfoSet = SetupApi.SetupDiGetClassDevs(
ref hidClassGuid,
null,
IntPtr.Zero,
SetupApi.DiGetFlags.DeviceInterface | SetupApi.DiGetFlags.Present);
if (deviceInfoSet == Kernel32.InvalidHandleValue)
{
throw new Win32Exception();
}
// Retrieve all available interface information.
SetupApi.SpDeviceInterfaceData did = new SetupApi.SpDeviceInterfaceData();
did.Size = Marshal.SizeOf(did);
int i = 0;
while (SetupApi.SetupDiEnumDeviceInterfaces(deviceInfoSet, IntPtr.Zero, ref hidClassGuid, i++, ref did))
{
// Obtain DevicePath
var didd = new SetupApi.SpDeviceInterfaceDetailData();
// On x64 only 8 appears to work while on x86 it must be sizeof (int) + sizeof (TCHAR)
didd.Size = IntPtr.Size == 8 ? 8 : IntPtr.Size + Marshal.SystemDefaultCharSize;
if (SetupApi.SetupDiGetDeviceInterfaceDetail(
deviceInfoSet,
ref did,
ref didd,
Marshal.SizeOf(didd),
IntPtr.Zero,
IntPtr.Zero))
{
// Write access causes failure if not running elevated.
IntPtr hDevice = Kernel32.CreateFile(
didd.DevicePath,
(uint)FileAccess.Read, // we just need read
FileShare.ReadWrite, // and we don't want to restrict others from write
IntPtr.Zero,
FileMode.Open,
FileAttributes.Device,
IntPtr.Zero);
if (hDevice != Kernel32.InvalidHandleValue)
{
Hid.DeviceAttributes attributes;
if (Hid.HidD_GetAttributes(hDevice, out attributes))
{
if (vendorId == attributes.VendorId && productIds.Contains(attributes.ProductId))
{
deviceList.Add(
new HidDevice(
hDevice,
didd.DevicePath,
vendorId,
attributes.ProductId,
attributes.VersionNumber));
continue;
}
}
// Close the wrong device handle
Kernel32.CloseHandle(hDevice);
}
}
}
// Free the device-information-set.
SetupApi.SetupDiDestroyDeviceInfoList(deviceInfoSet);
return(deviceList);
}
internal bool SetOutputReport(byte[] reportBuffer)
{
return(Hid.HidD_SetOutputReport(handle, reportBuffer, reportBuffer.Length));
}
internal bool GetInputReport(byte[] reportBuffer)
{
return(Hid.HidD_GetInputReport(handle, reportBuffer, reportBuffer.Length));
}
internal bool SetFeature(byte[] reportBuffer)
{
return(Hid.HidD_SetFeature(handle, reportBuffer, reportBuffer.Length));
}
public void Dispose()
{
Kernel32.CloseHandle(handle);
Hid.HidD_FreePreparsedData(preparsedData);
}
internal Hid.Caps GetCaps()
{
Hid.Caps caps;
Hid.HidP_GetCaps(preparsedData, out caps);
return(caps);
}
public static extern int HidP_GetCaps(IntPtr preparsedData, out Hid.Caps caps);
