Stateflow User's Guide

Overview of Stateflow Interfaces

Each Stateflow block interfaces to its Simulink model. Take an overview look at Stateflow interfaces to Simulink and MATLAB with the following topics:

• Stateflow Interfaces -- Lists the interfaces that Stateflow has to Simulink blocks, MATLAB data, and external code sources.
• Typical Tasks to Define Stateflow Interfaces -- Describes the tasks used to define Stateflow interfaces.
• Where to Find More Information on Events and Data -- Gives you references to further information on defining Stateflow interfaces in the Stateflow documentation.

Stateflow Interfaces

Each Stateflow block interfaces to its Simulink model. Each Stateflow block can interface to sources external to the Simulink model (data, events, custom code). Events and data are the Stateflow objects that define the interface from the Stateflow block's point of view.

Events can be local to the Stateflow block or can be propagated to and from Simulink and sources external to Simulink. Data can be local to the Stateflow block or can be shared with and passed to the Simulink model and to sources external to the Simulink model.

The Stateflow interfaces includes the following:

• Physical connections between Simulink blocks and the Stateflow block
• Event and data information exchanged between the Stateflow block and external sources
• The properties of a Stateflow chart.
• Graphical functions exported from a chart

• See Exporting Functions for more details.

• The MATLAB workspace

• See Using MATLAB Functions and Data in Actions for more details.

• Definitions in external code sources

Typical Tasks to Define Stateflow Interfaces

Defining the interface for a Stateflow block in a Simulink model involves some or all the tasks described in the following topics:

• Specify the update method for a Stateflow block in a Simulink model.

• This task is described in Setting the Stateflow Block Update Method.

• Define the input and output data and events that you need.

• See the following topics for detailed information:

  • Defining Input Events
  • Defining Output Events
  • Sharing Input and Output Data with Simulink

• Add and define any nonlocal data and events your Stateflow diagram must interact with.
• Define relationships with any external sources.

• See the topics MATLAB Workspace Interfaces and Interface to External Sources.

The precediing task list could be a typical sequence. You might find that another sequence better complements your model development.

See Implementing Simulink Update Interfaces for examples of implemented interfaces to Simulink.

Where to Find More Information on Events and Data

The following references are relevant to defining the interface for a Stateflow Chart block in Simulink:

• Defining Input Events
• Defining Output Events
• Importing Events from Stateflow External Code
• Exporting Events to Stateflow External Code
• Sharing Input and Output Data with Simulink
• Importing Data from External Stateflow Code
• Exporting Data to External Stateflow Code

Defining Interfaces to Simulink and MATLAB

Specifying Chart Properties

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