Events

Create triggers to activate other systems

Trigger actions within your Stateflow^® chart or other Simulink^® subsystems by using events. Trigger external actions by sending events to other charts in your Simulink model. For more information on sending events to the Schedule Editor to schedule the execution of aperiodic partitions, see Events in Schedule Editor (Simulink).

Blocks

Sequence Viewer

Display messages, events, states, transitions, and functions between blocks during simulation

Stateflow Syntax

Operators

Event Generation

`send`	Broadcast message or event
`change`	Generate implicit event when data changes value in Stateflow chart
`enter`	Generate implicit event when state becomes active
`exit`	Generate implicit event when state becomes inactive

Event-Based Temporal Logic

`after`	Execute chart after event broadcast or specified time
`at`	Execute chart at event broadcast or specified time
`before`	Execute chart before event broadcast or specified time
`every`	Execute chart at regular intervals
`temporalCount`	Number of events, chart executions, or time since state became active

Topics

Synchronize Model Components by Broadcasting Events
Use events to communicate with Simulink and MATLAB^®.
Manage Symbols in the Stateflow Editor
Add, delete, and trace nongraphical objects.
Set Properties for an Event
Specify event properties by using the Property Inspector or the Model Explorer.
Activate a Stateflow Chart by Sending Input Events
Broadcast edge triggers and function calls as input events.
Control States in Charts Enabled by Function-Call Input Events
Set the behavior of states when a function-call input event reenables a chart.
Activate a Simulink Block by Sending Output Events
Broadcast edge triggers and function calls as output events.
Control Function-Call Subsystems by Using bind Actions
Bind a function-call output event to the activity of a state.
Broadcast Local Events to Synchronize Parallel States
Communicate between parallel (AND) states by making directed event broadcasts.
Control Chart Behavior by Using Implicit Events
Trigger chart actions by changes in data values and state activity.
Use the Sequence Viewer to Visualize Messages, Events, and Entities
View the interchange of messages, events, and functions through the Sequence Viewer block.

Related Information

Event Semantics

Featured Examples

View Differences Between Stateflow Messages, Events, and Data

View Differences Between Stateflow Messages, Events, and Data

Compare the behavior of messages, events, and data in Stateflow charts.

Open Model

Yo-Yo Control of Satellites

Yo-Yo Control of Satellites

Model the control system for a satellite tethered to an orbiting platform.

Open Model

Detect and Isolate Faults in an Aircraft Elevator Control System

Detect and Isolate Faults in an Aircraft Elevator Control System

Design a fault detection, isolation, and recovery (FDIR) application for a pair of aircraft elevators controlled by redundant actuators.

Open Model

Count Events by Using the temporalCount Operator

Count Events by Using the temporalCount Operator

Count occurrences of explicit and implicit events.

Open Model