Simulink 中的定点代码生成

优化定点模型的代码生成

通过使用 Simulink^® Coder™ 或 Embedded Coder^®，您可以用 Fixed-Point Designer™ 生成 C 代码。从定点模型生成的代码仅使用整数类型，并自动包括处理定点位置中的差异所需的所有运算，例如移位。您可以在嵌入式定点处理器或快速原型设计系统上使用生成的代码，即使它们包含浮点处理器也没问题。

将 Fixed-Point Designer 与 HDL Coder™ 结合使用时，您可以从 Simulink 模型、Stateflow^® 图和 MATLAB Function 模块生成逐位精确的、可综合的 Verilog^® 和 VHDL^® 代码。

主题

高性能代码模型

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.

整合 MATLAB 代码

Control Data Types and Generate Code with MATLAB Function Block
Use data type override and fimath objects 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.

使用模型顾问

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.

自定义生成的代码

Control the Generation of Fixed-Point Utility Functions
Control the generation of fixed-point utility functions using specified minimum and maximum values.

保持标准合规性

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.

疑难解答

Supported Data Types

Data types supported for simulation and code generation.

精选示例

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.

打开脚本

Fixed-Point Multiword Operations In Generated Code

Control generation of multiword operations in generated code.

打开脚本

Fixed-Point Multiplication Helper Functions in Generated Code

Control the generation of multiplication helper functions in the generated code.

打开脚本

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.

打开实时脚本