Conversion en virgule fixe
Convertir du code à virgule flottante en virgule fixe et optimiser les types de données à virgule fixe (nécessite Fixed-Point Designer™)
Si vous disposez du produit Fixed-Point Designer, vous pouvez générer du code C/C++ à virgule fixe pour respecter les contraintes du hardware cible.
Classes
coder.FixPtConfig | Floating-point to fixed-point conversion configuration object |
Fonctions
coder | Open MATLAB Coder app |
codegen | Generate C/C++ code from MATLAB code |
coder.config | Create code generation configuration objects |
coder.approximation | Create function replacement configuration object |
coder.float2fixed.skip | Exclude functions from fixed-point conversion (depuis R2024b) |
Rubriques
Workflow de conversion automatique en virgule fixe
- Automated Fixed-Point Conversion
Using the command line to perform automated fixed-point conversion. - Automated Fixed-Point Conversion Best Practices
Generate fixed-point code according to best practices. - MATLAB Language Features Supported for Automated Fixed-Point Conversion
For automated fixed-point conversion, use supported MATLAB® language features. - Fixed-Point Code for MATLAB Classes
Use supported constructs and coding style best practices for fixed-point conversion of MATLAB classes. - Convert MATLAB Code to Fixed-Point C Code
Generate fixed-point C code withcodegen. - Convert Fixed-Point Conversion Project to MATLAB Scripts
Use project settings for fixed-point conversion at the command line.
Proposer des types à virgule fixe
- Specify Type Proposal Options
Specify options used when proposing types for automated fixed-point conversion. - Propose Fixed-Point Data Types Based on Simulation Ranges
Propose fixed-point data types based on simulation ranges using thecodegenfunction. - Propose Fixed-Point Data Types Based on Derived Ranges
Propose fixed-point data types based on static ranges using thecodegenfunction.
Remplacement de fonctions
- Replacing Functions Using Lookup Table Approximations
Generate lookup table approximations to replace custom functions or functions that are not supported for fixed point. - Replace the exp Function with a Lookup Table
Replace a function with a lookup table approximation in fixed-point code generated with thecodegenfunction. - Replace a Custom Function with a Lookup Table
Replace a custom function with a lookup table approximation function by using thecodegenfunction.
Vérifier la conversion en virgule fixe
- Visualize Differences Between Floating-Point and Fixed-Point Results
Use a custom plot function to compare the behavior of the generated fixed-point code against the behavior of the original floating-point MATLAB code. - Enable Plotting Using the Simulation Data Inspector
Inspect and compare floating-point and fixed-point logged input and output data. - Custom Plot Functions
Visualize numerical differences during fixed-point conversion. - Detect Overflows
Detect overflows at the command line.
Résolution des problèmes
- Generated Fixed-Point Code
Avoid issues with generated fixed-point code. - Data Type Issues in Generated Code
Highlight potential data type issues in report.
