Evolution-x/hardware_interfaces
1
0
Fork 0
mirror of https://github.com/Evolution-X/hardware_interfaces synced 2026-02-01 16:50:18 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge "Add explanation to VHAL_HEARTBEAT property"

Browse Source
This commit is contained in:
TreeHugger Robot
2020-09-25 00:53:47 +00:00
committed by Android (Google) Code Review
parent 69e6fc6e15 90a29284e2
commit eab5bfbe10
1 changed files with 7 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
automotive/vehicle/2.0/types.hal
View File

@@ -2951,11 +2951,14 @@ enum VehicleProperty : int32_t {
| VehicleArea:GLOBAL),
/**
* Defines an event that VHAL signals to the car watchdog as a heartbeat.
* Defines an event that VHAL signals to car watchdog as a heartbeat.
*
* VHAL is supposed to write system uptime to this property at every 3 second.
* Car watchdog subscribes to this property and checks if the property is updated at every 3
* second. If it isn’t, car watchdog considers VHAL unhealthy and terminates it.
* If VHAL supports this property, VHAL should write system uptime to this property at every 3
* second. Car watchdog subscribes to this property and checks if the property is updated at
* every 3 second. With the buffer time of 3 second, car watchdog waits for a heart beat to be
* signaled up to 6 seconds from the last heart beat. If it isn’t, car watchdog considers
* VHAL unhealthy and terminates it.
* If this property is not supported by VHAL, car watchdog doesn't check VHAL health status.
*
* @change_mode VehiclePropertyChangeMode:ON_CHANGE
* @access VehiclePropertyAccess:READ