Using Simulink

Fixed-Point Data

Simulink allows you to create models that use fixed-point numbers to represent signals and parameter values. Use of fixed-point data can reduce the memory requirements and increase the speed of code generated from a model.

To simulate a fixed-point model, you must have the Simulink Fixed Point product installed on your system. If Simulink Fixed Point is not installed on your system, you can simulate a fixed-point model as a floating-point model by enabling automatic conversion of fixed-point data to floating-point data during simulation. See Fixed-Point Settings Interface for more information. If you do not have Simulink Fixed Point installed and do not enable automatic conversion of fixed-point to floating-point data, Simulink displays an error when you try to simulate a fixed-point model.

You can edit a model containing fixed-point blocks without Simulink Fixed Point. However, you must have Simulink Fixed Point to

• Update a Simulink diagram (Ctrl+D) containing fixed-point data types
• Run a model containing fixed-point data types
• Generate code from a model containing fixed-point data types
• Log the minimum and maximum values produced by a simulation
• Automatically scale the output of a model using the autoscaling tool

Data Types Supported by Simulink

Fixed-Point Settings Interface

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