Simulink Fixed Point

Overview

Simulink Fixed Point™ enables the fixed-point capabilities of the Simulink^® product family, letting you use those products to design, simulate, and implement fixed-point control and signal processing algorithms.

With Simulink Fixed Point, you specify fixed-point data attributes, including word length and scaling for signals and parameters, in your model. You can perform bit-true simulations to observe the effects of limited range and precision on designs built with Simulink, Stateflow^®, DSP System Toolbox™, and other Simulink products. Automated fixed-point advisors guide you through the steps of converting floating-point models to fixed point. Additional tools analyze your model or use simulation results to recommend data types and scaling.

Simulink Fixed Point supports C, HDL, and PLC code generation with Simulink code-generation products.

Key Features

• Fixed-point modeling and simulation in Simulink, Stateflow, and other Simulink products
• Bit-true, fixed-point arithmetic for code generated by Simulink C, HDL, and PLC code-generation products
• Automated advisors that convert models from floating- to fixed-point data types
• Analysis tools for deriving ranges for all signals based on design information
• Data type tools that use range data to recommend word length and scaling
• Control of fixed-point data type and of scaling from 1- to 128-bit word sizes
• Customizable fixed-point operators and math functions for embedded code generation

Simulink model demonstrating the effect of limited range and precision on a signal, as shown on the scope (top right). The parameter dialog box (top left) allows full control of block parameters, including all fixed-point attributes.