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

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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 models that generate embeddable C code
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
Function Element Call	Specify function call to be issued via invoking function port

Topics

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.
Simulink Function Blocks in Referenced Models
Add and access functions in model components.
Call Simulink Functions in Other Models Using Function Ports
Use function ports to call a Simulink function in one referenced model from another referenced model.
Scoped, Global, and Port-Scoped Simulink Function Blocks Overview
Specify visibility and access of Simulink Function blocks.
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.
Diagnostics Using a Client-Server Architecture
Create a diagnostic service with functions where callers pass an error code.
Service-Oriented Sensor Modeling (System Composer)
Use a service interface to call services from multiple instances of a referenced component.

Featured Examples

Monitoring Ink Status on a Shared Printer Using Simulink Functions

How clients, in this case three computers, can send jobs to a server, a printer, and receive status from that server. This example highlights how Simulink functions can be called from different subsystems and interact in both Simulink® and Stateflow®. (Note that when you simulate the example, Stateflow might generate code in the current working folder.)

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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.

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Dynamic Priority Scheduling of Functions

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

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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.

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Wireless Tire Pressure Monitoring System with Fault Logging

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

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