private static extern uint HidP_GetCaps(IntPtr PreparsedData, ref HIDP_CAPS Capabilities);
public SafeFileHandle Open(ushort vid, ushort pid, int usagePage, int usage)
{
HidD_GetHidGuid(out Guid guid);
var info = SetupDiGetClassDevs(ref guid, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
if (info == INVALID_HANDLE_VALUE)
{
// printf("HID/win32: SetupDiGetClassDevs failed");
return(new SafeFileHandle(IntPtr.Zero, false));
}
var deviceInfoData = new SP_DEVICE_INTERFACE_DATA
{
cbSize = Marshal.SizeOf(typeof(SP_DEVICE_INTERFACE_DATA))
};
for (var index = 0;; index++)
{
var hasMore = SetupDiEnumDeviceInterfaces(info, NULL, ref guid, index, ref deviceInfoData);
if (!hasMore)
{
SetupDiDestroyDeviceInfoList(info);
return(new SafeFileHandle(IntPtr.Zero, false));
}
if (GetDeviceDetails(info, deviceInfoData, out var details))
{
continue;
}
var h = CreateFile(details.DevicePath, GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE, 0, OPEN_EXISTING,
0, NULL);
if (h.IsInvalid)
{
continue;
}
var attrib = new HIDD_ATTRIBUTES {
Size = Marshal.SizeOf <HIDD_ATTRIBUTES>()
};
hasMore = HidD_GetAttributes(h, ref attrib);
if (!hasMore)
{
h.Close();
continue;
}
//printf("HID/win32: USB Device:\n");
//printf("HID/win32: vid = 0x%04X\n", (int)(attrib.VendorID));
//printf("HID/win32: pid = 0x%04X\n", (int)(attrib.ProductID));
if (vid > 0 && vid != (int)(attrib.VendorID))
{
h.Close();
continue;
}
if (pid > 0 && pid != (int)(attrib.ProductID))
{
h.Close();
continue;
}
var hid_data = IntPtr.Zero;
if (!HidD_GetPreparsedData(h, ref hid_data))
{
// printf("HID/win32: HidD_GetPreparsedData failed\n");
h.Close();
continue;
}
var capabilities = new HIDP_CAPS();
HidP_GetCaps(hid_data, ref capabilities);
// if (hidPGetCaps != 0)
// {
//// printf("HID/win32: HidP_GetCaps failed\n");
// HidD_FreePreparsedData(ref hid_data);
// h.Close();
// continue;
// }
if (usagePage > 0 && usagePage != (int)(capabilities.UsagePage))
{
HidD_FreePreparsedData(ref hid_data);
h.Close();
continue;
}
if (usage > 0 && usage != (int)(capabilities.Usage))
{
HidD_FreePreparsedData(ref hid_data);
h.Close();
continue;
}
HidD_FreePreparsedData(ref hid_data);
return(h);
}
}
