AVL Time State

sequenceDiagram
    participant SystemTime
    participant LastValidPosition 
    participant RTC 
    participant GNSS 
    participant UserTime 
    SystemTime <- LastValidPosition: load last valid time and timestamp not older then build date
    SystemTime <- RTC: load RTC time if time valid flag and timestamp not older then build date
    SystemTime <- GNSS: load GNSS time if time and date valid and timestamp not older then build date
    RTC <- GNSS: set RTC time if time and date valid and timestamp not older then build date
    SystemTime <- UserTime: set Time via $PFAL,Sys.SetTime,dd.mm.yy,hh:mm:ss
    RTC <- UserTime: set Time via $PFAL,Sys.SetTime,dd.mm.yy,hh:mm:ss
    SystemTime -> LastValidPosition: save last Valid pos and time $PFAL,GPS.Nav.SaveLastValid

TEST

sequenceDiagram
    participant John
    participant Alice
    Alice->>John: Hello John, how are you?
    John-->>Alice: Great!