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HISTORICAL
SDV Telemetry Project |
Page History
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| Information Type | Values (per GM uServices) | VSS Alignment / Mapping | Android Alignment / Mapping | Notes |
|---|---|---|---|---|
Seat (Instances) Seat identity for 3 rows with 3 seats per row, front to back (looking towards front of vehicle from within the vehicle) |
| Vehicle.Cabin.Seat instances Vehicle.Cabin.Seat.Row1.DriverSide Related and should be kept in synch:
| VehicleAreaSeat. | ECUs are Drive Seat Module and Passenger Seat, the whole module moves from left to right by region |
| Vehicle.Cabin.Seat.Row1.Middle | |||
| Vehicle.Cabin.Seat.Row1.PassengerSide | |||
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Seat components that are movable or controllable, electrically driven.
| Information Type | Values | Illustration # |
|---|
| VSS Alignment / Mapping | Android Alignment / mapping | Notes |
|---|---|---|
Seat Component Moveable Seating Component (Electrically Driven) | Complete seat | All |
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Vehicle.Cabin.Seat.Row1.DriverSide.Position:
datatype: uint16
description: Seat position on vehicle x-axis. Position is relative to the frontmost position supported by the seat. 0 = Frontmost position supported.
min: 0
type: actuator
unit: mm
Lumbar
- Top
- Middle
- Lower
5
Should there be a seat type (e.g. individual, partof bench, 2/3 split...)? | ||
Lumbar
| 5 |
| Current
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Differs: Lumbar is only one piece in VSS not three components Proposed
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Differs: Lumbar is only one piece in Android | ||
Cushion Side Bolster | 12
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Differs: Does not exist in VSS Proposed Seating.SideBolsterSupportRight Seating.SideBolsterSupportLeft | ||
Backrest Side Bolster | 11
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Current
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Differs: SideBolster is represented as one piece vs two |
Proposed
| SEAT_LUMBAR_SIDE_SUPPORT | |
Upper Shoulder (fwd/ |
backward) | 9 | Differs: Does not exist in VSS. Is it needed? Proposed Backrest.UpperShoulderSupport | Differs: Does not exist in Android | |
Backrest (was Cushion Front) | 10 | Current
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Cushion Extension | 13 Blue thing |
Thigh Extension?
Current
| Differs: Does not exist in Android | |||
Headrest | 4 | Current
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Airbag | Current
VSS has deployed but not enabled. Proposed
| Has enabled only not deployed | Should we consider extending VSS for other airbags. | |
Neck Scarf (fan) | 6 | Differs: Does not exist |
Propose Vehicle.Cabin.Seat.NeckScarf | Differs: Does not exist | Add to VSS? |
Seat Belt (height) |
Current
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Seat Component Illustrations (maintained on Miro)
Bolsters and Bladders:
Seat & Component Movements or Positions
Words describing control parameters or changeable properties related to movement or position.
| Information Type | Definition | Values | Illustration # |
|---|
| VSS Alignment / Mapping | Android Alignment / Mapping | Notes |
|---|---|---|
| Direction | Direction of seat or component movement |
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Applied by seat or component like:
| Is Fold a direction? Team agreed it is a capability | ||
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Applied by Seat or Component like:
| Applied by seat or component like:
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Applied by inflatable Component like:
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Applied by Component like:
degrees - Seat z-axis depends on seat tilt. This means that movement of backrest due to seat tilting will not affect Backrest.Recline as long as the angle between Seating and Backrest are constant. Absolute recline relative to vehicle z-axis can be calculated as Tilt + Backrest.Recline.
degrees - Headrest angle, relative to backrest, 0 degrees if parallel to backrest, Positive degrees = tilted forward. | ||||
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| Position | position on horizontal plane (x-axis) or vertical plane (z-axis) of seat or component |
Percent of total? clicks? x, y, z axis values?
Should height be separate?
Is y-axis needed?
Seat position on vehicle x-axis. mm - Position is relative to the frontmost position supported by the seat. 0 = Frontmost position supported.
mm - Seat position on vehicle z-axis. Position is relative within available movable range of the seating. 0 = Lowermost position supported. | AI: align what position means | |||
| Tilt Angle | tilt angle of seat or component (also known as recline) |
duplicate to Tilt / Recline (angles)
duplicate to Tilt / Recline (angles) under "direction" above
degrees - Seat z-axis depends on seat tilt. This means that movement of backrest due to seat tilting will not affect Backrest.Recline as long as the angle between Seating and Backrest are constant. Absolute recline relative to vehicle z-axis can be calculated as Tilt + Backrest.Recline.
degrees - Headrest angle, relative to backrest, 0 degrees if parallel to backrest, Positive degrees = tilted forward. |
Seat Heating and Cooling
Words describing control parameters or changeable properties related to seat heating and cooling.
| Information Type | Definition | Values | Illustration # |
|---|
| VSS Mapping | Android Alignment / mapping | Notes |
|---|---|---|
Temperature |
Cooling (level 1, 2, 3)
Heat (level 1, 2, 3)
| HVAC_SEAT_TEMPERATURE | Should this be heating cooling? | |||
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| Fan Speed |
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| Not in VSS | Not the same | What does this apply to? | |||
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Seat Massage
| Information Type | Definition | Values | Illustration # |
|---|
| VSS Alignment / Mapping | Android Alignment / Mapping | Notes |
|---|---|---|
| Massage Capability | Is the seat capable of providing massage. | yes/no or true/false |
Not in VSS Recommendation | Not in Andriod | ||
| Massage Status | On/Off |
| ||
| Massage Types | Available massage types for a specific seat, including none. | Values will vary by OEM, therefore, need a capability to determine types per seat. |
| Not in VSS | Not in Android | |||
| Seat Massage Type |
|
| Not in VSS | Not in Android | ||
| Massage Intensity | Intensity of massage |
| Vehicle.Cabin.Seat.Row1.DriverSide.MassageLevel - Seat massage level. 0 = off. 100 = max massage. |
Seat Haptics
Haptics are seat or component vibrations used to alert the driver or provide feedback. Typically used by ADAS such as lane departure warning.
| Information Type | Definition | Values | Illustration # |
|---|
| VSS Alignment / Mapping | Android Alignment / Mapping | |
|---|---|---|
| Delay Between Pulses |
| Not in VSS | Not in Android | ||||
| Haptic Pulses |
Seat Occupancy and Safety
| Information Type | Definition | Values | Illustration # |
|---|
| VSS Alignment / Mapping | Android Alignment / Mapping | Notes | ||||
|---|---|---|---|---|---|---|
| Seat Occupancy Status |
| Vehicle.Cabin.Seat.Row1.DriverSide.IsOccupied - boolean - is or is not occupied. No Unkown. | ||||
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| Seat Occupant ID |
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| Child seat |
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| Seat Belt Status |
| Vehicle.Cabin.Seat.Row1.DriverSide.IsBelted - boolean - is or is not belted/fastened Related:
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Other Seat Information
| Information Type | Definition | Values | Illustration # | BMW | Ford | GM | Volvo Cars | VSS Alignment / Mapping | Android Alignment / Mapping | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| Seat Switch |
| Address in VSS - Is this needed for capabilities? |
...
Seat Movement and Position
VSS Examples /
Capability | Description | Inputs | Outputs |
Dependencies
Assumptions /Constraints
VSS Examples / Mapping | Android Examples / Mapping | Notes | ||||
| Movement & Position - Control | ||||||
| Move Seat Continuously | Move the identified seat in the specified direction. When a user commands a seat in a certain direction, it will move in that direction until the value is changed. The change (e.g. stop) could come from the user or a hardware limit. |
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| Vehicle.Cabin.Seat.Row1.DriverSide.Switch.IsForwardEngaged: Question: How does something other than a switch use this capability? | SEAT_FORE_AFT_MOVE includes speed. | Android includes speed. VSS does not. Is it needed? |
| Move Seat to Specified Position | Set the seat position for the identified seat. This is entire seat position forward, back, up down. |
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Seat position on vehicle x-axis. mm - Position is relative to the frontmost position supported by the seat. 0 = Frontmost position supported.
mm - Seat position on vehicle z-axis. Position is relative within available movable range of the seating. 0 = Lowermost position supported. | What is the position definition? ISO 8895 What is status? Position Status. | |
| Move Seat Component Continuously | Move the identified seat and component in the specified direction. When a user commands a seat component in a certain direction, it will move in that direction until the value is changed. The change (e.g. stop) could come from the user or a hardware limit. |
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| Vehicle.Cabin.Seat.Row1.Middle.Switch.Headrest.IsForwardEngaged: Question: How does something other than a switch use this capability? | Different classes of comportment? Certain directions apply to different components? Need to enumerate the components? Component type? | |
| Set Seat Component Position Per Seat | Set the seat component position for the identified seat. This is position of the component only. |
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| Applied by Component and Direction like:
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| Store Seat Position | Stores current seat and component positions |
| N/A | N/A | Personalization not in VSS or Android | |
| Recall Seat Position | Recall seat and component positions |
| N/A | N/A | Personalization not in VSS or Android | |
| Fold Headrest | Fold or unfold headrest |
| Align with move seat compontent? | |||
| Fold Seat | Fold or unfold seat |
| Align with move seat component | |||
| Movement & Position - Status / Data | ||||||
| Get Seat Position Per Seat | Get the seat position for the identified seat. This is entire seat position. |
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| Get Seat Component Position Per Seat | Get the seat component position for the identified seat. This is position of the component only. |
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| Get Seat Ids / Locations | Provides the list of seats available in "this" Vehicle |
| Array of:
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Seat Movement Illustrations:
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Capability | Description | Inputs | Outputs | Dependencies | Assumptions /Constraints | VSS Examples / Mapping | Android Examples / Mapping | Notes |
| Seat Occupant Safety - Status / Data Per Seat | ||||||||
| Get Seat Occupant Safety Per Seat | Get the occupant safety status for the identified seat |
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| Get Child Seat Status | Allows user to determine if a Child Seat is installed |
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Interfaces
Android VHAL Interface
The vehicle hardware abstraction layer (VHAL) interface defines the properties OEMs can implement and contains property metadata. For example, whether a property is an integer and which change modes are allowed. The VHAL interface is based on accessing (reading, writing, and subscribing) a property, which is an abstraction for a specific function.
Set Seat Position (SEAT_FORE_AFT_POS)
| Code Block | ||||
|---|---|---|---|---|
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CarPropertyManager manager = (CarPropertyManager) car.getCarManager(Car.PROPERTY_SERVICE);
// 1. Get seat position
int position = manager.getIntProperty(VehiclePropertyIds.SEAT_FORE_AFT_POS,
Seat.SEAT_ROW_1_LEFT);
Log.d("CAR_APP", "Seat fore-aft: " + position);
// 2. Set new seat position
manager.setIntProperty(VehiclePropertyIds.SEAT_FORE_AFT_POS,
Seat.SEAT_ROW_1_LEFT,
50); // New position
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Move Seat (SEAT_FORE_AFT_MOVE)
| Code Block | ||||
|---|---|---|---|---|
| ||||
Car car = Car.createCar(context);
CarPropertyManager manager = (CarPropertyManager) car.getCarManager(Car.PROPERTY_SERVICE);
// Move seat forward
manager.setIntProperty(VehiclePropertyIds.SEAT_FORE_AFT_MOVE,
Seat.SEAT_ROW_1_LEFT,
1);
// Optional: stop movement after some time (e.g. button release)
new Handler().postDelayed(() -> {
manager.setIntProperty(VehiclePropertyIds.SEAT_FORE_AFT_MOVE,
Seat.SEAT_ROW_1_LEFT,
0); // stop
}, 1000); // stop after 1 second |
Zonal Architecture for Reference
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Overview
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