SEAT and STEERING_WHEEL properties

This page describes how each SEAT_* and STEERING_WHEEL_* vehicle property relates to the position and movement of a seat and steering wheel in a vehicle.

SEAT_* and STEERING_WHEEL_* properties are vehicle properties defined in VehicleProperty.aidl in the hardware/interfaces directory and VehiclePropertyIds.java in the packages/services/Car directory and exposed through the CarPropertyManager. Use these properties to control the state and movement of all the actuators commonly present in the seat and steering wheel. For example, the angle and movement of the seat backrest is digitized through the SEAT_BACKREST_ANGLE_1_* properties.

Properties

Two properties are attached to each actuator:

• _POS describes the current position of the part of the seat and steering wheel it controls.

• _MOVE describes in what direction and speed the part is moving, which is set to 0 when stationary.

Detailed designs

The highlighted portions in each diagram display which parts of the seat and steering wheel are moving due to changing the value of its corresponding property. The solid arrow represents the movement when the _MOVE property is positive (for example, the _POS property is increasing) and the dotted arrow represents the movement when the _MOVE property is negative (for example, the _POS property is decreasing).

Property name in VehicleProperty.aidl
SEAT_BACKREST_ANGLE_1 SEAT_BACKREST_ANGLE_1_POS SEAT_BACKREST_ANGLE_1_MOVE
SEAT_BACKREST_ANGLE_2 SEAT_BACKREST_ANGLE_2_POS SEAT_BACKREST_ANGLE_2_MOVE
SEAT_BELT_HEIGHT SEAT_BELT_HEIGHT_POS SEAT_BELT_HEIGHT_MOVE
SEAT_CUSHION_SIDE_SUPPORT SEAT_CUSHION_SIDE_SUPPORT_POS SEAT_CUSHION_SIDE_SUPPORT_MOVE
SEAT_DEPTH SEAT_DEPTH_POS SEAT_DEPTH_MOVE
SEAT_FORE_AFT SEAT_FORE_AFT_POS SEAT_FORE_AFT_MOVE
SEAT_HEADREST_ANGLE SEAT_HEADREST_ANGLE_POS SEAT_HEADREST_ANGLE_MOVE
SEAT_HEADREST_FORE_AFT SEAT_HEADREST_FORE_AFT_POS SEAT_HEADREST_FORE_AFT_MOVE
SEAT_HEADREST_HEIGHT SEAT_HEADREST_HEIGHT_POS_V2 SEAT_HEADREST_HEIGHT_MOVE
SEAT_HEIGHT SEAT_HEIGHT_POS SEAT_HEIGHT_MOVE
SEAT_LUMBAR_FORE_AFT SEAT_LUMBAR_FORE_AFT_POS SEAT_LUMBAR_FORE_AFT_MOVE
SEAT_LUMBAR_SIDE_SUPPORT SEAT_LUMBAR_SIDE_SUPPORT_POS SEAT_LUMBAR_SIDE_SUPPORT_MOVE
SEAT_LUMBAR_VERTICAL SEAT_LUMBAR_VERTICAL_POS SEAT_LUMBAR_VERTICAL_MOVE
SEAT_TILT SEAT_TILT_POS SEAT_TILT_MOVE
SEAT_WALK_IN SEAT_WALK_IN_POS
STEERING_WHEEL_DEPTH STEERING_WHEEL_DEPTH_POS STEERING_WHEEL_DEPTH_MOVE
STEERING_WHEEL_HEIGHT STEERING_WHEEL_HEIGHT_POS STEERING_WHEEL_HEIGHT_MOVE