| Stateflow | |
Event-Driven Effects on Semantics
What Does Event-Driven Mean?
The Stateflow diagram executes only when an event occurs; an event occurs and the Stateflow diagram is awakened to respond to the event. Exactly what executes depends on the circumstances when the event occurs. Actions that are to take place based on an event are atomic to that event. Once an action is initiated, it is completed unless interrupted by an early return.
Top-Down Processing of Events
When an event occurs, it is processed from the top or root of the Stateflow diagram down through the hierarchy of the Stateflow diagram. At each level in the hierarchy, any during and on event_name actions for the active state are executed and completed and then a check for the existence of a valid explicit or implicit transition among the children of the state is conducted. The examples in this chapter demonstrate the top-down processing of events.
| | Semantics | Semantics of Active and Inactive States | |