Device-Driver/logitech-G29.md

Logitech G29 USB Protocol

• 12 bytes per event
• Little-endian (= smaller value bytes first)

                                          1
  0   1   2   3   4   5   6   7   8   9   0   1
+---+---+---+---+---+---+---+---+---+---+---+---+
|    Buttons    |  Rot  |Gas|Brk|Clt|GrX|GrY|GrZ|
+---+---+---+---+---+---+---+---+---+---+---+---+

• Buttons: Bitmask of pressed buttons (mask values are in big endian).
  • 0x00000001 - ?
  • 0x0000000E - Arrow keys
    • 0x00000000 - Up
    • 0x00000002 - Right
    • 0x00000004 - Down
    • 0x00000006 - Left
    • 0x00000008 - No arrow key pressed
  • 0x00000010 - X
  • 0x00000020 - Square
  • 0x00000040 - Circle
  • 0x00000080 - Triangle
  • 0x00000100 - R1
  • 0x00000200 - L1
  • 0x00000400 - R2
  • 0x00000800 - L2
  • 0x00001000 - Share
  • 0x00002000 - Option
  • 0x00004000 - R3
  • 0x00008000 - L3
  • 0x00010000 - Gear 1
  • 0x00020000 - Gear 2
  • 0x00040000 - Gear 3
  • 0x00080000 - Gear 4
  • 0x00100000 - Gear 5
  • 0x00200000 - Gear 6
  • 0x00400000 - Gear reverse
  • 0x00800000 - Plus
  • 0x01000000 - Minus
  • 0x02000000 - Red rotation clockwise
  • 0x04000000 - Red rotation counterclockwise
  • 0x08000000 - Return
  • 0xF0000000 - ?
• Rot: Wheel rotation (little-endian). 0x0000 (leftmost) - 0xFFFF (rightmost).
• Gas: Gas pedal. 0xFF (up, default) - 0x00 (down).
• Brk: Brake pedal. 0xFF (up, default) - 0x00 (down).
• Clt: Clutch pedal. 0xFF (up, default) - 0x00 (down).
• GrX: Gearshift X axis. ~0x30 (gear 1+2), ~0x80 (gear 3+4), ~0xB0 (gear 5+6+reverse).
• GrY: Gearshift Y axis. ~0xD0 (gear 1+3+5), ~0x40 (gear 2+4+6+reverse).
• GrZ: Gearshift Z axis. ~0x9C (neutral), ~0xDC (pressed down).

Sample event

Sample event:

08 00 00 00   00 80   ff ff ff   81 80 9c

• No buttons pressed / no gear engaged
• Wheel rotation at 0x8000 ~ center
• Gas pedal up
• Brake pedal up
• Clutch pedal up
• Gearshift neutral