Simulink Functions

Create functions accessible in Simulink models

A Simulink^® function is a computational unit that calculates a set of outputs when provided with a set of inputs. Since a Simulink function provides a common text interface to its function definition and a function caller, how you define the function is your choice. Possible function definitions include using:

Simulink blocks in a Simulink Function block
Stateflow^® state transitions in an exported Stateflow graphical function
MATLAB^® code statements in an exported Stateflow MATLAB function

After you define a function, you can call it using a Function Caller block, a MATLAB Function block, or a Stateflow chart.

Blocks

expand all

Functions

Simulink Function	Graphically define a function with Simulink blocks
Chart	Implement control logic with finite state machine

Function Callers

Function Caller	Call Simulink or exported Stateflow function
MATLAB Function	Include MATLAB code in Simulink models
Chart	Implement control logic with finite state machine

Local Environment Signals

Inport	Create input port for subsystem or external input
Outport	Create output port for subsystem or external output
Function Element	Specify function to be called via exporting function port (Since R2022a)
Function Element Call	Specify function call to be issued via invoking function port (Since R2022a)

Topics

Understanding Simulink Functions

Simulink Functions Overview
Functions in a Simulink model that share a common text interface with function callers.
Add a Simulink Function to a Model
Define a Simulink function using a Simulink Function block or an exported graphical or MATLAB function from a Stateflow chart.
Call a Simulink Function from a Model
Call a Simulink function from a Simulink model using a Function Caller block, a MATLAB Function block, or a Stateflow chart.
Scoped, Global, and Port-Scoped Simulink Function Blocks Overview
Specify visibility and access of Simulink Function blocks.
Simulink Function Blocks in Referenced Models
Add and access functions in model components.

Scoped Simulink Functions

Scoped Simulink Function Blocks in Subsystems
Limit the scope of a function to a subsystem.
Scoped Simulink Function Blocks in Models
Limit the scope of a function to a model.
Define Diagnostic Services Using Simulink Functions
Create a diagnostic service with functions where callers pass an error code.
Resolve Error: Block Is Unable to Call The Scoped Simulink Function
Troubleshoot block unable to call the function error in Simulink.

Client-Server Interfaces in Simulink

Model Client-Server Communication Using Function Ports
Use function ports to model client and server components in a service-oriented architecture.
Model Service-Oriented Communication Between Sensors (System Composer)
Use a service interface to call services from multiple instances of a referenced component.
Service Interfaces Overview (System Composer)
Create client and server ports, author service interfaces in Interface Editor, associate interfaces with ports.

Featured Examples

Model Service Access from Application Software Using Scoped Simulink Functions

Model services and accessing these services from a separate component.

Open Live Script

Monitor Ink Status on Shared Printer Using Simulink Functions

How multiple clients can send requests to a server and receive a status from the server. Using Simulink® functions, different subsystems can call functions from other subsystems and interact in Simulink and Stateflow®. In this example, you model the ink status monitoring of a shared printer using Simulink functions.

Open Live Script

Model Reusable Components Using Multiply Instanced Simulink Functions

In this example, the model slexCounterFunctionMdlRef contains the Simulink® function update, which maintains a counter. Multiple instancing provides the ability to reuse this logic as CounterA and CounterB in this example model.

Open Model

Dynamic Priority Scheduling of Functions

A common modeling pattern to dynamically schedule the execution of functions using a Stateflow® chart.

Open Model

Temperature Control System Communicating with Messages

Distributed control of room temperatures by processing messages from room thermostats and communicating control commands using messages to different receivers.

Open Model

Wireless Tire Pressure Monitoring System with Fault Logging

Model a wireless tire pressure monitoring system with fault logging using message communication.

Open Example