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R2012a Documentation → Simulink Fixed Point
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Contents

Index

• Getting Started

Sharing Fixed-Point Models

Selecting a Measurement Scale

Example: Selecting a Measurement Scale

Configuring Blocks with Fixed-Point Output

Configuring Blocks with Fixed-Point Parameters

Passing Fixed-Point Data Between Simulink Models and the MATLAB Software

Automatic Data Typing Tools

Code Generation Capabilities

About This Example

Block Descriptions

• User's Guide

• Data Types and Scaling

• Arithmetic Operations

• Realization Structures

• Fixed-Point Advisor

• Fixed-Point Tool

• Automatically Converting a Floating-Point Model to Fixed Point

• Tutorial: Producing Lookup Table Data

• Automatic Data Typing

About Automatic Data Typing

Before Using the Fixed-Point Tool to Propose Data Types for Your Simulink Model

• Best Practices for Using the Fixed-Point Tool to Propose Data Types for Your Simulink Model

Use a Known Working Simulink Model

Back Up Your Simulink Model

Capture the Current Fixed-Point Instrumentation and Data Type Override Settings

Convert Individual Subsystems

Isolate the System Under Conversion

Use Lock Output Data Type Setting

Save Simulink Signal Objects

Test Update Diagram Failure

Models That Might Cause Data Type Propagation Errors

• Automatic Data Typing Using Simulation Data

Workflow for Automatic Data Typing Using Simulation Data

Set Up the Model

Prepare the Model for Conversion

Gather a Floating-Point Benchmark

Propose Data Types

Examine Results to Resolve Conflicts

Apply Proposed Data Types

Verify New Settings

Automatic Data Typing of Simulink Signal Objects

• Automatic Data Typing Using Derived Minimum and Maximum Values

Prerequisites for Automatic Data Typing Using Derived Minimum and Maximum Values

Workflow for Automatic Data Typing Using Derived Data

Set Up the Model

Prepare Model Prior to Automatic Data Typing Using Derived Data

Derive Minimum and Maximum Values

Resolve Range Analysis Issues

Propose Data Types

Examine Results to Resolve Conflicts

Apply Proposed Data Types

• Propose Fraction Lengths

Propose Fraction Lengths

About the Feedback Controller Example Model

Propose Fraction Lengths Using Simulation Range Data

• Propose Word Lengths

How the Fixed-Point Tool Proposes Word Lengths

Propose Word Lengths

Propose Word Lengths Based on Simulation Data

• Propose Data Types For a Model Using Results from Multiple Simulations

About This Example

Running the Simulation

• Range Analysis

• Code Generation

• Fixed-Point Advisor Reference

• Writing Fixed-Point S-Functions

Selected Bibliography

• Release Notes

Automatic Data Typing

Effects of Spacing on Speed, Error, and Memory Usage

Effects of Spacing on Speed, Error, and Memory Usage

About Automatic Data Typing

About Automatic Data Typing

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