docs/descriptors/gulikit_kingkong2_android.md
# USB Descriptor for GuliKit KingKong 2 (Android mode)
Hex dump of the controller descriptor:
```
# xxd -c20 -g1 /sys/class/hidraw/hidraw18/device/report_descriptor
00000000: 05 01 09 05 a1 01 85 01 09 01 a1 00 09 30 09 31 15 00 27 ff .............0.1..'.
00000014: ff 00 00 95 02 75 10 81 02 c0 09 01 a1 00 09 33 09 34 15 00 .....u.........3.4..
00000028: 27 ff ff 00 00 95 02 75 10 81 02 c0 05 01 09 32 15 00 26 ff '......u.......2..&.
0000003c: 03 95 01 75 0a 81 02 15 00 25 00 75 06 95 01 81 03 05 01 09 ...u.....%.u........
00000050: 35 15 00 26 ff 03 95 01 75 0a 81 02 15 00 25 00 75 06 95 01 5..&....u.....%.u...
00000064: 81 03 05 01 09 39 15 01 25 08 35 00 46 3b 01 66 14 00 75 04 .....9..%.5.F;.f..u.
00000078: 95 01 81 42 75 04 95 01 15 00 25 00 35 00 45 00 65 00 81 03 ...Bu.....%.5.E.e...
0000008c: 05 09 19 01 29 0a 15 00 25 01 75 01 95 0a 81 02 15 00 25 00 ....)...%.u.......%.
000000a0: 75 06 95 01 81 03 05 01 09 80 85 02 a1 00 09 85 15 00 25 01 u.................%.
000000b4: 95 01 75 01 81 02 15 00 25 00 75 07 95 01 81 03 c0 05 0f 09 ..u.....%.u.........
000000c8: 21 85 03 a1 02 09 97 15 00 25 01 75 04 95 01 91 02 15 00 25 !........%.u.......%
000000dc: 00 75 04 95 01 91 03 09 70 15 00 25 64 75 08 95 04 91 02 09 .u......p..%du......
000000f0: 50 66 01 10 55 0e 15 00 26 ff 00 75 08 95 01 91 02 09 a7 15 Pf..U...&..u........
00000104: 00 26 ff 00 75 08 95 01 91 02 65 00 55 00 09 7c 15 00 26 ff .&..u.....e.U..|..&.
00000118: 00 75 08 95 01 91 02 c0 85 04 05 06 09 20 15 00 26 ff 00 75 .u........... ..&..u
0000012c: 08 95 01 81 02 c0 00
```
Parsed descriptor:
(via https://eleccelerator.com/usbdescreqparser/)
```
0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
0x09, 0x05, // Usage (Game Pad)
0xA1, 0x01, // Collection (Application)
0x85, 0x01, // Report ID (1)
0x09, 0x01, // Usage (Pointer)
0xA1, 0x00, // Collection (Physical)
0x09, 0x30, // Usage (X)
0x09, 0x31, // Usage (Y)
0x15, 0x00, // Logical Minimum (0)
0x27, 0xFF, 0xFF, 0x00, 0x00, // Logical Maximum (65534)
0x95, 0x02, // Report Count (2)
0x75, 0x10, // Report Size (16)
0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0xC0, // End Collection
0x09, 0x01, // Usage (Pointer)
0xA1, 0x00, // Collection (Physical)
0x09, 0x33, // Usage (Rx)
0x09, 0x34, // Usage (Ry)
0x15, 0x00, // Logical Minimum (0)
0x27, 0xFF, 0xFF, 0x00, 0x00, // Logical Maximum (65534)
0x95, 0x02, // Report Count (2)
0x75, 0x10, // Report Size (16)
0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0xC0, // End Collection
0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
0x09, 0x32, // Usage (Z)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x03, // Logical Maximum (1023)
0x95, 0x01, // Report Count (1)
0x75, 0x0A, // Report Size (10)
0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x15, 0x00, // Logical Minimum (0)
0x25, 0x00, // Logical Maximum (0)
0x75, 0x06, // Report Size (6)
0x95, 0x01, // Report Count (1)
0x81, 0x03, // Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
0x09, 0x35, // Usage (Rz)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x03, // Logical Maximum (1023)
0x95, 0x01, // Report Count (1)
0x75, 0x0A, // Report Size (10)
0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x15, 0x00, // Logical Minimum (0)
0x25, 0x00, // Logical Maximum (0)
0x75, 0x06, // Report Size (6)
0x95, 0x01, // Report Count (1)
0x81, 0x03, // Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
0x09, 0x39, // Usage (Hat switch)
0x15, 0x01, // Logical Minimum (1)
0x25, 0x08, // Logical Maximum (8)
0x35, 0x00, // Physical Minimum (0)
0x46, 0x3B, 0x01, // Physical Maximum (315)
0x66, 0x14, 0x00, // Unit (System: English Rotation, Length: Centimeter)
0x75, 0x04, // Report Size (4)
0x95, 0x01, // Report Count (1)
0x81, 0x42, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,Null State)
0x75, 0x04, // Report Size (4)
0x95, 0x01, // Report Count (1)
0x15, 0x00, // Logical Minimum (0)
0x25, 0x00, // Logical Maximum (0)
0x35, 0x00, // Physical Minimum (0)
0x45, 0x00, // Physical Maximum (0)
0x65, 0x00, // Unit (None)
0x81, 0x03, // Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x05, 0x09, // Usage Page (Button)
0x19, 0x01, // Usage Minimum (0x01)
0x29, 0x0A, // Usage Maximum (0x0A)
0x15, 0x00, // Logical Minimum (0)
0x25, 0x01, // Logical Maximum (1)
0x75, 0x01, // Report Size (1)
0x95, 0x0A, // Report Count (10)
0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x15, 0x00, // Logical Minimum (0)
0x25, 0x00, // Logical Maximum (0)
0x75, 0x06, // Report Size (6)
0x95, 0x01, // Report Count (1)
0x81, 0x03, // Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x05, 0x01, // Usage Page (Generic Desktop Ctrls)
0x09, 0x80, // Usage (Sys Control)
0x85, 0x02, // Report ID (2)
0xA1, 0x00, // Collection (Physical)
0x09, 0x85, // Usage (Sys Main Menu)
0x15, 0x00, // Logical Minimum (0)
0x25, 0x01, // Logical Maximum (1)
0x95, 0x01, // Report Count (1)
0x75, 0x01, // Report Size (1)
0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0x15, 0x00, // Logical Minimum (0)
0x25, 0x00, // Logical Maximum (0)
0x75, 0x07, // Report Size (7)
0x95, 0x01, // Report Count (1)
0x81, 0x03, // Input (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0xC0, // End Collection
0x05, 0x0F, // Usage Page (PID Page)
0x09, 0x21, // Usage (0x21)
0x85, 0x03, // Report ID (3)
0xA1, 0x02, // Collection (Logical)
0x09, 0x97, // Usage (0x97)
0x15, 0x00, // Logical Minimum (0)
0x25, 0x01, // Logical Maximum (1)
0x75, 0x04, // Report Size (4)
0x95, 0x01, // Report Count (1)
0x91, 0x02, // Output (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0x15, 0x00, // Logical Minimum (0)
0x25, 0x00, // Logical Maximum (0)
0x75, 0x04, // Report Size (4)
0x95, 0x01, // Report Count (1)
0x91, 0x03, // Output (Const,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0x09, 0x70, // Usage (0x70)
0x15, 0x00, // Logical Minimum (0)
0x25, 0x64, // Logical Maximum (100)
0x75, 0x08, // Report Size (8)
0x95, 0x04, // Report Count (4)
0x91, 0x02, // Output (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0x09, 0x50, // Usage (0x50)
0x66, 0x01, 0x10, // Unit (System: SI Linear, Time: Seconds)
0x55, 0x0E, // Unit Exponent (-2)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x01, // Report Count (1)
0x91, 0x02, // Output (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0x09, 0xA7, // Usage (0xA7)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x01, // Report Count (1)
0x91, 0x02, // Output (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0x65, 0x00, // Unit (None)
0x55, 0x00, // Unit Exponent (0)
0x09, 0x7C, // Usage (0x7C)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x01, // Report Count (1)
0x91, 0x02, // Output (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile)
0xC0, // End Collection
0x85, 0x04, // Report ID (4)
0x05, 0x06, // Usage Page (Generic Dev Ctrls)
0x09, 0x20, // Usage (Battery Strength)
0x15, 0x00, // Logical Minimum (0)
0x26, 0xFF, 0x00, // Logical Maximum (255)
0x75, 0x08, // Report Size (8)
0x95, 0x01, // Report Count (1)
0x81, 0x02, // Input (Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position)
0xC0, // End Collection
0x00, // Unknown (bTag: 0x00, bType: 0x00)
// 307 bytes
// best guess: USB HID Report Descriptor
```