public static IEnumerable<HidDevice> GetDevices()
{
Guid hidGuid = HidDevice.HIDGuid;
// Get the list of HID devices
IntPtr deviceInfoSet = new IntPtr();
deviceInfoSet = setup.SetupDiGetClassDevs(ref hidGuid, IntPtr.Zero, IntPtr.Zero, setup.DIGCF_PRESENT | setup.DIGCF_DEVICEINTERFACE);
int memberIndex = 0;
SP_DEVICE_INTERFACE_DATA MyDeviceInterfaceData = new SP_DEVICE_INTERFACE_DATA();
MyDeviceInterfaceData.cbSize = Marshal.SizeOf(MyDeviceInterfaceData);
bool success;
bool lastDevice = false;
int bufferSize = 0;
UnmanagedMemory detailDataBuffer;
List<HidDevice> devicePathNames = new List<HidDevice>();
bool deviceFound = false;
do
{
success = setup.SetupDiEnumDeviceInterfaces(deviceInfoSet,
IntPtr.Zero,
ref hidGuid,
memberIndex,
ref MyDeviceInterfaceData);
if (!success)
{
lastDevice = true;
}
else
{
// First call to get size of data buffer
success = setup.SetupDiGetDeviceInterfaceDetail(deviceInfoSet,
ref MyDeviceInterfaceData,
IntPtr.Zero,
0,
ref bufferSize,
IntPtr.Zero);
// Allocate memory for the SP_DEVICE_INTERFACE_DETAIL_DATA structure using the returned buffer size
detailDataBuffer = new UnmanagedMemory(bufferSize);
// Store cbSize in the first bytes of the array. The number of bytes varies with 32- and 64-bit systems.
Marshal.WriteInt32(detailDataBuffer.MemoryPointer, (IntPtr.Size == 4) ? (4 + Marshal.SystemDefaultCharSize) : 8);
// Call SetupDiGetDeviceInterfaceDetail again.
// This time, pass a pointer to DetailDataBuffer
// and the returned required buffer size.
success = setup.SetupDiGetDeviceInterfaceDetail
(deviceInfoSet,
ref MyDeviceInterfaceData,
detailDataBuffer.MemoryPointer,
bufferSize,
ref bufferSize,
IntPtr.Zero);
//diDetail.cbSize = (IntPtr.Size == 4) ? (4 + Marshal.SystemDefaultCharSize) : 8;
//SP_DEVICE_INTERFACE_DETAIL_DATA diDetail = new SP_DEVICE_INTERFACE_DETAIL_DATA();
//diDetail.cbSize = Marshal.SizeOf(diDetail);
//success = setup.SetupDiGetDeviceInterfaceDetail
// (deviceInfoSet,
// ref MyDeviceInterfaceData,
// ref diDetail,
// diDetail.cbSize,
// ref bufferSize,
// IntPtr.Zero);
IntPtr pDevicePathName = detailDataBuffer.MemoryPointer + 4;
string devicePathName = Marshal.PtrToStringAuto(pDevicePathName);
HidDevice newDevice = new HidDevice(devicePathName);
devicePathNames.Add(newDevice);
deviceFound = true;
}
memberIndex++;
} while (!lastDevice);
// Destroy the device Info Set to cleanup memory
setup.SetupDiDestroyDeviceInfoList(deviceInfoSet);
return devicePathNames;
}
/// <summary>
/// Construction. Setup the buffer with the correct output report length dictated by the device
/// </summary>
/// <param name="oDev">Creating device</param>
public OutputReport(HidDevice oDev)
: base(oDev)
{
SetBuffer(new byte[oDev.outputReportLength]);
}
/// <summary>
/// Construction. Do nothing
/// </summary>
/// <param name="oDev">Creating device</param>
public InputReport(HidDevice oDev)
: base(oDev)
{
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="oDev">Constructing device</param>
public Report(HidDevice oDev)
{
// Do nothing
}
