Preface
What Is the Fixed-Point Blockset?
Exploring the Blockset
How to Get Online Help
System Requirements
Licensing Information
Related Products
Using This Guide
Expected Background
If You Are a New User
If You Are an Experienced User
How This Book Is Organized
Installation
Typographical Conventions
Introduction
Overview
Physical Quantities and Measurement Scales
Selecting a Measurement Scale
Example: Selecting a Measurement Scale
Why Use Fixed-Point Hardware?
Why Use the Fixed-Point Blockset?
The Development Cycle
Compatibility with Simulink Blocks
Unified Simulink and Fixed-Point Blockset Blocks
Frame-Based Signals
Matrix Signals
Getting Started with the Blockset
Overview of Blockset Features
Configuring Fixed-Point Blocks
Additional Features and Capabilities
Example: Converting from Doubles to Fixed-Point
Block Descriptions
Simulation Results
Demos
Basic Fixed-Point Blockset Demos
Advanced Fixed-Point Blockset Demos
Examples
Data Types and Scaling
Overview
Fixed-Point Numbers
Signed Fixed-Point Numbers
Radix Point Interpretation
Scaling
Quantization
Range and Precision
Example: Fixed-Point Scaling
Example: Constant Scaling for Best Precision
Floating-Point Numbers
Scientific Notation
The IEEE Format
Range and Precision
Exceptional Arithmetic
Arithmetic Operations
Overview
Limitations on Precision
Rounding
Padding with Trailing Zeros
Example: Limitations on Precision and Errors
Example: Maximizing Precision
Limitations on Range
Saturation and Wrapping
Guard Bits
Example: Limitations on Range
Recommendations for Arithmetic and Scaling
Addition
Accumulation
Multiplication
Gain
Division
Summary
Parameter and Signal Conversions
Parameter Conversions
Signal Conversions
Rules for Arithmetic Operations
Computational Units
Addition and Subtraction
Multiplication
Division
Shifts
Example: Conversions and Arithmetic Operations
Realization Structures
Overview
Realizations and Data Types
Targeting an Embedded Processor
Size Assumptions
Operation Assumptions
Design Rules
Canonical Forms
Direct Form II
Series Cascade Form
Parallel Form
Tutorial: Feedback Controller Simulation
Overview
Simulink Model of a Feedback Design
Simulation Setup
Idealized Feedback Design
Digital Controller Realization
Direct Form Realization
Simulation Results
1. Initial Guess at Scaling
2. Data Type Override
3. Automatic Scaling
Tutorial: Producing Lookup Table Data
Overview
Worst Case Error for a Lookup Table
Example: Square Root Function
Creating Lookup Tables for a Sine Function
Parameters for fixpt_look1_func_approx
Setting Function Parameters for the Lookup Table
Example 1: Using errmax with Unrestricted Spacing
Example 2: Using nptsmax with Unrestricted Spacing
Example 3: Using errmax with Even Spacing
Example 4: Using nptsmax with Even Spacing
Example 5: Using errmax with Power of Two Spacing
Example 6: Using nptsmax with Power of Two Spacing
Specifying Both errmax and nptsmax
Comparing the Examples
Summary: Using the Lookup Table Functions
Effect of Spacing on Speed, Error, and Memory Usage
Data ROM Required
Determining Out-of-Range Inputs
Determining Input Location
Interpolation
Conclusion
Functions--By Category
Conversions
Fixed-Point Settings Interface
Global Changes
Lookup Tables
Data Type Structures
Tools
Functions--Alphabetical List
Blocks--By Category
Bits
Calculus
Data Type
Delays & Holds
Edge Detect
Filters
Logic & Comparison
LookUp
Math
Nonlinear
Select
Sources
Overview of the Block Reference Pages
The Block Dialog Box
Common Block Features
Block Parameters
Block Icon Labels
Port Data Type Display
Blocks--Alphabetical List
Code Generation
Overview
Code Generation Support
Languages
Storage Class of Variables
Storage Class of Parameters
Rounding Modes
Overflow Handling
Blocks
Scaling
Generating Pure Integer Code
Example: Generating Pure Integer Code
HTML Report
Using the Simulink Accelerator
Using External Mode or rsim Target
External Mode
Rapid Simulation Target
Customizing Generated Code
Macros Versus Functions
Bit Sizes for Target C Compiler
Selected Bibliography
Printable Documentation (PDF)
Product Page (Web)