Report Sensor Data

The information from the Accelerometers/Gyroscopes is sent as HID data and is streamed over USB Interface 4. It also contains some other information such as current volume, button presses (on Vol+, Vol- and Mute), display status, etc.

INTERFACE 4: Human Interface Device ====================
 bLength            :    0x9 (9 bytes)
 bDescriptorType    :    0x4 Interface
 bInterfaceNumber   :    0x4
 bAlternateSetting  :    0x0
 bNumEndpoints      :    0x1
 bInterfaceClass    :    0x3 Human Interface Device
 bInterfaceSubClass :    0x0
 bInterfaceProtocol :    0x0
 iInterface         :    0x7 PS VR Sensor
  ENDPOINT 0x83: Interrupt IN ==========================
   bLength          :    0x7 (7 bytes)
   bDescriptorType  :    0x5 Endpoint
   bEndpointAddress :   0x83 IN
   bmAttributes     :    0x3 Interrupt
   wMaxPacketSize   :   0x40 (64 bytes)
   bInterval        :    0x3

##Six axis sensor model BMI055

• Accelerometer configured at ± 2g 1024 LSB/g
• Gyroscope configured at 131.2f ± 250°/s: 131.2 LSB/°/s (need confirmation)
• Accelerometer data is raw data from the sensor, it must be displaced 4 bits to the right preserving sign

##These are the sensor report fields:

• 00: byte, Button status mask, b0 = unknown, b1 = volume down, b2 = volume up, b3 = mute

• 01: byte, Unknown

• 02: byte, Volume, 0 to 50

• 08: byte, Status mask

•   b0 = Worn 
  

•   b1 = Display on
  

•   b2 = Unknown
  

•   b3 = Mute
  

•   b4 = Earphone
  

•   b5 = Unknown
  

•   b6 = Unknown
  

•   b7 = appears to alternate every second
  

• 15: byte, unknown, Mode (bit 7 -> 0x00=Cine, 0x40=VR)

---First sensor group---

• 16: integer, Timestamp1 (in micro-seconds, rolls back at 0x00FFFFFF)
• 19: byte, padding (0x00 seen)

-Gyroscope 1

• 20: short, Yaw (signed, +ve turn left, -ve turn right)
• 22: short, Pitch (signed, +ve look up, -ve look down)
• 24: short, Roll (signed, +ve clockwise, -ve anticlock)

-Accelerometer 1

• 26: short, X axis //It's the X value of the sensor, but it's mounted rotated on the headset
• 28: short, Y axis //Corrected
• 30: short, Z axis

---Second sensor group---

• 32: integer, Timestamp2 (in micro-seconds, rolls back at 0x00FFFFFF)
• 35: byte, padding (0x00 seen)

-Gyroscope 2

• 36: short, Yaw (signed, +ve turn left, -ve turn right)
• 38: short, Pitch (signed, +ve look up, -ve look down)
• 40: short, Roll (signed, +ve clockwise, -ve anticlock)

-Accelerometer 2

• 42: short, X axis //Corrected
• 44: short, Y axis //Corrected
• 46: short, Z axis //Corrected
• 47: byte, Unknown

--General data--

• 48: byte, Calibration status? 255 = boot, 0-3 calibrating? 4 = calibrated, maybe a bit mask with sensor status? (0 bad, 1 good)?
• 49: byte, Sensors ready
• 50: byte?, Unknown
• 51: byte?, Unknown
• 52: byte?, Unknown
• 53: byte, Voltage reference? starts in 0 and suddenly jumps to 3
• 54: byte, Voltage value? starts on 0, ranges very fast to 255, when switched from VR to Cinematic and back varies between 255 and 254 and sometimes oscillates between them
• 55: short, Infrared headset sensor, 0 to 1023, used to measure distance between the face/head and visor
• 57: byte?, Unknown
• 58: byte?, Unknown
• 59: byte?, Unknown
• 60: byte?, Unknown
• 61: short, Sampling Period (micro-seconds)
• 63: byte, Packet sequence