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USB¤

Code Description
0x20 Get device data

Supported Device Types¤

  • 0x00: No device connected
  • 0x01: Keyboard
  • 0x02: Mouse
  • 0x03: Gamepad
  • 0x04: Mass Storage

Get Device Data¤

Request¤

Send 0x20 to pull queued USB reports from the attached device (only one device is supported).

Response Format¤

[byte: 0x20] [uint16: packet_length] [byte: device_type] [byte: report_count] [reports...]
  • packet_length: bytes following this field.
  • report_count: number of reports included (0 when no data or no device).

Device Data Formats¤

No Device (0x00)¤

report_count is 0; no additional bytes.

Keyboard (0x01)¤

Each report: 

[byte: modifier_keys] [byte: reserved] [6 bytes: key_codes]

Modifier Keys Flags: - Bit 0: Left Ctrl - Bit 1: Left Shift - Bit 2: Left Alt - Bit 3: Left GUI (Windows/Command) - Bit 4: Right Ctrl - Bit 5: Right Shift - Bit 6: Right Alt - Bit 7: Right GUI

Mouse (0x02)¤

Each report: 

[byte: buttons] [byte: x_movement] [byte: y_movement] [byte: wheel]

Buttons: - Bit 0: Left button - Bit 1: Right button - Bit 2: Middle button - Bits 3-7: Reserved

Gamepad (0x03)¤

Each report: 

[byte: buttons] [byte: lt_analog] [byte: rt_analog] [byte: lx_analog] [byte: ly_analog] [byte: rx_analog] [byte: ry_analog]

Buttons: - Bit 0: A / Cross - Bit 1: B / Circle - Bit 2: X / Square - Bit 3: Y / Triangle - Bit 4: LB / L1 - Bit 5: RB / R1 - Bit 6: Back / Select - Bit 7: Start

Mass Storage (0x04)¤

TODO