public static List <HidInfo> Browse()
{
Guid gHid;
List <HidInfo> info = new List <HidInfo>();
// Obtain hid guid
Native.HidD_GetHidGuid(out gHid);
// Get list of present hid devices
var hInfoSet = Native.SetupDiGetClassDevs(ref gHid, null, IntPtr.Zero, Native.DIGCF_DEVICEINTERFACE | Native.DIGCF_PRESENT);
// Allocate mem for interface descriptor
var iface = new Native.DeviceInterfaceData();
// Set size field
iface.Size = Marshal.SizeOf(iface);
// Interface index
uint index = 0;
// iterate through all interfaces
while (Native.SetupDiEnumDeviceInterfaces(hInfoSet, 0, ref gHid, index, ref iface))
{
short vid, pid;
var path = GetPath(hInfoSet, ref iface);
var handle = Open(path);
if (handle != Native.INVALID_HANDLE_VALUE)
{
var man = GetManufacturer(handle);
var prod = GetProduct(handle);
var serial = GetSerialNumber(handle);
GetVidPid(handle, out vid, out pid);
var cap = GetDeviceCapabilities(handle);
HidInfo i = new HidInfo(prod, serial, man, path, vid, pid, cap);
info.Add(i);
Close(handle);
}
index++;
}
// Clean up
if (Native.SetupDiDestroyDeviceInfoList(hInfoSet) == false)
{
throw new Win32Exception();
}
return(info);
}
private static string GetPath(IntPtr hInfoSet, ref Native.DeviceInterfaceData iface)
{
var detIface = new Native.DeviceInterfaceDetailData();
uint reqSize = (uint)Marshal.SizeOf(detIface);
/* Set size. The cbSize member always contains the size of the
* fixed part of the data structure, not a size reflecting the
* variable-length string at the end. */
detIface.Size = Marshal.SizeOf(typeof(IntPtr)) == 8 ? 8 : 5;
bool status = Native.SetupDiGetDeviceInterfaceDetail(hInfoSet, ref iface, ref detIface, reqSize, ref reqSize, IntPtr.Zero);
if (!status)
{
throw new Win32Exception();
}
return(detIface.DevicePath);
}
