Generazione di codice in virgola fissa in Simulink
È possibile generare codice C con Fixed-Point Designer™ utilizzando Simulink® Coder™ o Embedded Coder®. Il codice generato dai modelli in virgola fissa utilizza solo tipi interi e include automaticamente tutte le operazioni, come gli scorrimenti, necessarie per tenere conto delle differenze nelle posizioni in virgola fissa. È possibile utilizzare il codice generato su processori embedded in virgola fissa o su sistemi di prototipazione rapida anche se contengono un processore in virgola mobile.
Quando viene utilizzato con HDL Coder™, Fixed-Point Designer consente di generare codice Verilog® e VHDL® sintetizzabile bit-true da modelli di Simulink, diagrammi di Stateflow® e blocchi MATLAB Function.
Argomenti
Modellazione di codice ad alte prestazioni
- Lookup Table Optimization
Optimize lookup tables in your model to improve efficiency. - Selecting Data Types for Basic Operations
How to select efficient data types for basic fixed-point operations. - Fixed-Point Code Generation Support
Simulink features supported for fixed-point code generation.
Incorporazione di codice MATLAB
- Control Data Types and Generate Code with MATLAB Function Block
Use data type override andfimathobjects with the MATLAB Function block. - Generate Fixed-Point FIR Code Using MATLAB Function Block
Create and generate code for a fixed-point, low-pass, direct form FIR filter.
Utilizzo di Model Advisor
- Optimize Generated Code with the Model Advisor
Use the Model Advisor to identify model settings that might lead to non-optimal results in code generation. - Net Slope Computation
Control how the software handles net slope computations in generated code.
Personalizzazione del codice generato
- Control the Generation of Fixed-Point Utility Functions
Control the generation of fixed-point utility functions using specified minimum and maximum values.
Mantenimento della conformità agli standard
- Use of Shifts by C Code Generation Products
Understand the use of shifts by MathWorks® coder products including how to control the shifts using optimization settings in the configuration parameters as well as modeling techniques.
Risoluzione dei problemi
Data types supported for simulation and code generation.
Esempi in primo piano
Fixed-Point Optimizations Using Specified Minimum and Maximum Values
Optimize fixed-point operations in generated code using minimum and maximum values that you specify in a model. Minimum and maximum values can represent environmental limits or mechanical limits, such as the output ranges of sensors. The code generation software can use these values to create more efficient code by eliminating unreachable code branches and unnecessary utility functions.
Fixed-Point Multiword Operations in Generated Code
Control generation of multiword operations in generated code.
Fixed-Point Multiplication Helper Functions in Generated Code
Control the generation of multiplication helper functions in the generated code.
Specify Fixed-Point Math Properties in MATLAB Function Block
Specify fixed-point math properties in a MATLAB Function block. You can specify fimath properties to add fixed-point numbers without bit growth. The same methods also apply to subtraction and multiplication.
