ds_usb_input_report.txt

USB

0 Report ID 1 (0x01)
1 LX (0-255)
2 LY (0-255)
3 RX (0-255)
4 RY (0-255)
5 L2 (0-255)
6 R2 (0-255)
7 Frame Counter (Increment by 1 per poll)
8 DPad (0-7 clockwise, 8 default), Square (16), Cross (32), Circle (64), Triangle (128)
9 L1 (1), R1 (2), L2Btn (4), R2Btn (8), Create (16), Options (32), L3 (64), R3 (128)
10 PS (1), TP Click (2) , Mute (4)
11 ???? (Always 0 for me)
12-15 Counter? (Increment by 1 per poll)
16-17 Gyro Pitch
18-19 Gyro Yaw
20-21 Gyro Roll
22-23 Accel X
24-25 Accel Y
26-27 Accel Z
28-31 ???? (Seems to increment by ~12000 per poll)
32 Battery? (15 max?)
33 Touch 1 ID (&0x7f)
34-36 Touch 1 Coordinates
37 Touch 2 ID (&0x7f)
38-40 Touch 2 Coordinates
41 Touch Packet Counter
42 ???? (Always 9 for me)
43 ???? (Always 9 for me)

44-48 ???? (Always 0 for me)

49-52 Counter? (Seems to increment by ~12000 per poll)

53 Extension? Battery (0-10), Charging (16), Fully Charged (32)
54 Extension? Audio L? (1), Audio R? (2),  Charging (8)
55 Extension? Mic? (1)

56-63 ????

12-14 timestamp
16-17 Accel X
18-19 Accel Y
20-21 Accel Z
22-23 Gyro Z
24-25 Gyro Y
26-27 Gyro X
41 Touch duration? (goes crazy when you touch)
49-52 another timestamp
53 Battery charging (0x10)
(not so sure about gyro XYZ, maybe the order is wrong, I couldn't figure it out)

I couldn't find any information about total battery.
BT seems to have the same with +1.

32 Mine goes up to 17, it chances every time I plug in to computer so properly not battery.
52 goes up by 1 about every 5 second.
53 seems like battery from 1~10. Mine goes up to 42.

@SamuelChih @naumazeredo Can you explain the first battery field?

I'm seeing "18" for the first battery field (byte at index 32) even though it says 15 max.

Also can you explain the touchpad ID thing a little bit more? What exactly does this denote? When I mask the values like it says with 0x7F I get 35 for touchID 1 and 15 for touchID 2.

Also can you explain the touchpad ID thing a little bit more? What exactly does this denote? When I mask the values like it says with 0x7F I get 35 for touchID 1 and 15 for touchID 2.

The Touch ID byte switches values depending on whether a finger touch is active. The value will be between 0-127 when a touch is active; the value will be between 128-255 when no touch is detected (active + 128). The value increments by 1 on each active touch.

The Touch 2 ID will change when the controller detect a second touch.