Messages

Send messages to pass data between charts

Send, receive, and forward messages that carry data to communicate between Stateflow® charts. Messages are queued until the receiving chart can process them. View the lifeline of messages in the Sequence Viewer block.

Blocks

QueueEnqueue messages and entities
Sequence ViewerDisplay messages, events, states, transitions, and functions between blocks during simulation

Stateflow Syntax

expand all

discardDiscard message
forwardForward message
isvalidDetermine if message is valid
lengthDetermine length of message queue
receiveExtract message from queue
sendBroadcast message or event

Topics

Communicate with Stateflow Charts by Sending Messages

Synchronize model components and share data by sending messages between Stateflow charts.

Set Properties for a Message

Specify message properties by using the Property Inspector or the Model Explorer.

Control Message Activity in Stateflow Charts

Send, receive, discard, or forward a Stateflow message.

Send Messages with String Data

Communicate between charts by using messages with string payloads.

Resolve Undefined Symbols in Your Chart

Detect and add undefined data, events, and messages.

Use the Sequence Viewer Block to Visualize Messages, Events, and Entities

View the interchange of messages, events, and functions through the Sequence Viewer block.

Related Information

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
Model a Distributed Traffic Control System by Using Messages

Model a Distributed Traffic Control System by Using Messages

Model a distributed control system for an intersection of one-way roads. To coordinate the state of the traffic lights, the two charts communicate with each other by using messages. The design of the two charts is identical.

Open Model
Model a Fitness Tracker

Model a Fitness Tracker

Implement a fitness tracker by using temporal logic and extrinsic function calls in Stateflow®. The fitness tracker consists of a Simulink® model and a MATLAB® user interface (UI) created by using App Designer. The model has three components. Human_Simulator is a subsystem that models your activity. This subsystem outputs signals that represent your heart rate, your speed, and the number of steps that you have taken.

Open Model
Stateflow Documentation
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