Fixed-Point Converter

(Not recommended) Convert MATLAB code to fixed point

The Fixed-Point Converter app is not recommended. Convert fixed-point conversion projects to MATLAB^® scripts instead. For more information, see Version History.

Description

The Fixed-Point Converter app converts floating-point MATLAB code to fixed-point MATLAB code.

Using the app, you can:

Propose data types based on simulation range data, static range data, or both.
Propose fraction lengths based on default word lengths or propose word lengths based on default fraction lengths.
Optimize whole numbers.
Specify safety margins for simulation min/max data.
View a histogram of bits used by each variable.
Specify replacement functions or generate approximate functions for functions in the original MATLAB algorithm that do not support fixed point.
Test the numerical behavior of the fixed-point code. You can then compare its behavior against the floating-point version of your algorithm using either the Simulation Data Inspector or your own custom plotting functions.

If your end goal is to generate fixed-point C code, use the MATLAB Coder™ app instead. See Convert MATLAB Code to Fixed-Point C Code (MATLAB Coder).

If your end goal is to generate HDL code, use the HDL Coder™ workflow advisor instead. See Floating-Point to Fixed-Point Conversion (HDL Coder).

Open the Fixed-Point Converter App

MATLAB Toolstrip: On the Apps tab, under Code Generation, click the app icon.
MATLAB command prompt: Enter fixedPointConverter.
To open an existing Fixed-Point Converter app project, either double-click the .prj file or open the app and browse to the project file.
Creating a project or opening an existing project causes any other Fixed-Point Converter or MATLAB Coder projects to close.
A MATLAB Coder project opens in the MATLAB Coder app. To convert the project to a Fixed-Point Converter app project, in the MATLAB Coder app:
1. Click and select Reopen project as.
2. Select Fixed-Point Converter.

Examples

Programmatic Use

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`fixedPointConverter`

fixedPointConverter opens the Fixed-Point Converter app.

`fixedPointConverter -tocode projectname`

fixedPointConverter -tocode projectname converts the existing project named projectname.prj to the equivalent script of MATLAB commands. It writes the script to the Command Window.

`fixedPointConverter -tocode projectname -script scriptname`

fixedPointConverter -tocode projectname -script scriptname converts the existing project named projectname.prj to the equivalent script of MATLAB commands. The script is named scriptname.m.

If scriptname already exists, fixedPointConverter overwrites it.
The script contains the MATLAB commands to:
- Create a floating-point to fixed-point conversion configuration object that has the same fixed-point conversion settings as the project.
- Run the fiaccel command to convert the floating-point MATLAB function to a fixed-point MATLAB function.

Before converting the project to a script, you must complete the Test step of the fixed-point conversion process.

Version History

Introduced in R2014b

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R2024b: To be removed

The Fixed-Point Converter app will be removed in a future release. Convert your existing fixed-point conversion projects to MATLAB scripts using the -tocode option of the fixedPointConverter command. For more information, see Convert Fixed-Point Conversion Project to MATLAB Scripts.