Functions Editor

Visualize and author component functions in software architectures

Description

The Functions Editor allows you to author functions in the architecture level for inline components. You can then implement Simulink^® behaviors for your authored functions. For reference components, the functions are automatically created from the referenced behavior Simulink models.

Use the Functions Editor to:

• Author and visualize functions.

  • Add and delete functions.

  • Change the execution order of the functions.

  • Change the name of a function.

  • Change the period of a function.

• Implement behaviors for functions.

• Add custom properties to functions using stereotypes.

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Open the Functions Editor

• System Composer™ toolstrip: Navigate to Modeling > Functions Editor.

Examples

• Authoring Functions for Software Components of an Adaptive Cruise Control
• Author and Extend Functions for Software Architectures
• Define Profiles and Stereotypes
• Use Property Inspector in System Composer

Parameters

Add function — Add function to software component

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Add a function to a software component by clicking .

Remove function — Remove function from software component

button

Remove a function from a software component by clicking .

Increase execution order — Increase execution order of function

button

Increase the execution order of a function by clicking .

This option is only available if Order functions by dependency is unchecked.

Decrease execution order — Decrease execution order of function

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Decrease the execution order of a function by clicking .

This option is only available if Order functions by dependency is unchecked.

Update diagram — Update diagram to refresh functions

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Update the software architecture diagram to refresh the functions in the Functions Editor by clicking .

Order functions by dependency — Whether to order functions by dependency

off (default) | on

Select this check box to order functions in the Functions Editor by dependency.

You can order functions automatically based on their data dependencies. This functionality is available for functions from behavior models. To enable automatic sorting, select the Order functions by dependency check box or enable OrderFunctionsByDependency on the architecture model.

Programmatic Use

Use the addFunction function to author functions. Use the createSimulinkBehavior function to create new Simulink rate-based or export-function behaviors and link the software component to the new model.

More About

Software Architecture

A software architecture is a specialization of an architecture for software-based systems, including the description of software compositions, component functions, and their scheduling.

Use software architectures in System Composer to author software architecture models composed of software components, ports, and interfaces. Design your software architecture model, define the execution order of your component functions, simulate your design in the architecture level, and generate code.

Software Component

A software component is a specialization of a component for software entities, including its functions (entry points) and interfaces.

Implement a Simulink export-function, rate-based, or JMAAB model as a software component, simulate the software architecture model, and generate code.

Software Composition

A software composition is a diagram of software components and connectors that represents a composite software entity, such as a module or application.

Encapsulate functionality by aggregating or nesting multiple software components or compositions.

Function

A function is an entry point that can be defined in a software component.

You can apply stereotypes to functions in software architectures, edit sample times, and specify the function period using the Functions Editor.

Service Interface

A service interface defines the functional interface between client and server components. Each service interface consists of one or more function elements.

Once you have defined a service interface in the Interface Editor, you can assign it to client and server ports using the Property Inspector. You can also use the Property Inspector to assign stereotypes to service interfaces.

Function Element

A function element describes the attributes of a function in a client-server interface.

Edit the function prototype on a function element to change the number and names of inputs and outputs of the function. Edit function element properties as you would edit other interface element properties. Function argument types can include built-in types as well as bus objects. You can specify function elements to support:

• Synchronous execution — When the client calls the server, the function runs immediately and returns the output arguments to the client.

• Asynchronous execution — When the client makes a request to call the server, the function is executed asynchronously based on the priority order defined in the Functions Editor and Schedule Editor and returns the output arguments to the client.

Function Argument

A function argument describes the attributes of an input or output argument in a function element.

You can set the properties of a function argument in the Interface Editor just as you would any value type: Type, Dimensions, Units, Complexity, Minimum, Maximum, and Description.

Version History

Introduced in R2021b