Describe Component Behavior UsingStateflowCharts
Astate chartdiagram demonstrates the state-dependent behavior of a component throughout its state lifecycle and the events that can trigger a transition between states.
添加Stateflow®chart behavior to describe a component using state machines. You cannot synchronize and reuse Stateflow chart behaviors asReference Componentblocks because the component is part of the parent model.
You can simulate the Stateflow component implementations in System Composer™. Use theSimulation Data Inspectorto view and compare simulation results between model designs.
状态图是由一组有限的智慧h transitions between them to capture the modes of operation for the component. Charts allow you to design for different modes, internal states, and event-based logic of a system. You can also use charts as stubs to mock a complex component implementation during top-down integration testing. This functionality requires a Stateflow license. For more information, seeStateflow.
Add State Chart Behavior to Component
A System Composer component with stereotypes, interfaces, requirement links, and ports, is preserved when you add StateflowChart(Stateflow)behavior.
This example uses the architecture model for an unmanned aerial vehicle (UAV) to add state chart behavior to a component. In the MATLAB®Command Window, enter the following command:
scExampleSmallUAV
Double-click the
Airframe
component. Select theLandingGear
component on the System Composer composition editor.Select the
Brake
port. Open theInterface Editorfrom the toolstripModeling>Interface Editor. Right-click the interfaceoperatorCmds
and selectAssign to Selected Port(s).Right-click the
LandingGear
component and selectCreate Stateflow Chart Behavior
. Alternatively, navigate toModeling>Create Stateflow Chart Behavior.Double-click
LandingGear
, which has the Stateflow icon. Navigate toModeling>Design Data>Symbols Paneto view the Stateflow symbols. The input portBrake
appears as input data in the symbols pane.Note
Some Stateflow objects remain local to Stateflow charts. Input and output event ports are not supported in System Composer. Only local events are supported.
Since Stateflow ports show up as input and output data objects, they must follow Stateflow naming conventions. Ports are automatically renamed to follow Stateflow naming conventions. For more information, seeGuidelines for Naming Stateflow Objects(Stateflow).
Select the
Brake
input and view the interface in the Property Inspector. The interface can be accessed like a Simulink®bus signal. For information on how to use bus signals in Stateflow, seeIndex and Assign Values to Stateflow Structures(Stateflow).You can populate the Stateflow canvas to represent the internal states of the
LandingGear
.
RemoveStateflowChart Behavior from Component
You can remove Stateflow chart behavior from a component to delete the contents inside the Stateflow chart while preserving interfaces on the component.
Right-click on the
LandingGear
component and selectInline Behavior
.To confirm the operation to delete all the content inside the Stateflow chart, clickOK.
The Stateflow chart behavior on the component is removed. Interfaces on the component are preserved.
See Also
createStateflowChartBehavior
|inlineComponent