Beispiel #1
0
 private static extern uint HidP_GetCaps(IntPtr PreparsedData, ref HIDP_CAPS Capabilities);
Beispiel #2
0
        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);
            }
        }