/// <summary>
/// Get USB HID device path
/// </summary>
private static string GetDevicePath(IntPtr hInfoSet, ref NativeMethods.DeviceInterfaceData oInterface)
{
uint nRequiredSize = 0;
if (NativeMethods.SetupDiGetDeviceInterfaceDetail(hInfoSet, ref oInterface, IntPtr.Zero, 0, ref nRequiredSize, IntPtr.Zero) == false)
{
// TODO: Find a solution
// Tip: http://stackoverflow.com/questions/1054748/setupdigetdeviceinterfacedetail-unexplainable-error
//throw new HIDDeviceException();
}
var oDetail = new NativeMethods.DeviceInterfaceDetailData();
oDetail.Size = Marshal.SizeOf(typeof(IntPtr)) == 8 ? 8 : 5; // x86/x64 magic...
if (NativeMethods.SetupDiGetDeviceInterfaceDetail(hInfoSet, ref oInterface, ref oDetail, nRequiredSize, ref nRequiredSize, IntPtr.Zero) == false)
{
throw new Win32Exception();
}
return(oDetail.DevicePath);
}
/// <summary>
/// Return a list information of connected USB HID devices
/// </summary>
static public IEnumerable <HIDInfoSet> GetInfoSets()
{
var devicePathList = new List <HIDInfoSet>();
Guid gHid;
NativeMethods.HidD_GetHidGuid(out gHid);
var hInfoSet = NativeMethods.SetupDiGetClassDevs(ref gHid, null, IntPtr.Zero, NativeMethods.DIGCF_DEVICEINTERFACE | NativeMethods.DIGCF_PRESENT);
if (hInfoSet == NativeMethods.InvalidHandleValue)
{
throw new Win32Exception();
}
var oInterface = new NativeMethods.DeviceInterfaceData();
oInterface.Size = Marshal.SizeOf(oInterface);
int nIndex = 0;
while (NativeMethods.SetupDiEnumDeviceInterfaces(hInfoSet, 0, ref gHid, (uint)nIndex, ref oInterface))
{
var strDevicePath = GetDevicePath(hInfoSet, ref oInterface);
var handle = Open(strDevicePath);
if (handle != NativeMethods.InvalidHandleValue)
{
var productString = GetName(handle);
var serialNumberString = GetSerialNumber(handle);
NativeMethods.HIDD_ATTRIBUTES attributes;
GetAttr(handle, out attributes);
devicePathList.Add(new HIDInfoSet(productString, serialNumberString, strDevicePath, attributes.VendorID, attributes.ProductID, attributes.VersionNumber));
}
nIndex++;
}
if (NativeMethods.SetupDiDestroyDeviceInfoList(hInfoSet) == false)
{
throw new Win32Exception();
}
return(devicePathList);
}
