变体代码生成

为包含变体模块、变体参数、变体转移和符号维度的模型生成代码

您可以在生成的代码中包含变体模块、变体参数、变体转移和符号维度的替代设计。生成的代码中的变体使您能够在不同的开发阶段重用并配置代码，例如测试不同的实现或将多功能代码提供给第三方。您可以根据选择的变体控制项激活或反激活变体。有关变体控制项的详细信息，请参阅Introduction to Variant Controls。您还可以在生成的代码中控制变体控制项的外观、位置、定义和声明。

要为模型中的可变组件生成代码，请安装 Embedded Coder^® 或 Simulink^® Coder™。

主题

Prepare Variant-Containing Model for Code Generation
Configure and generate code for a variant model.

精选示例

Create Variant Controls Using an In-Memory Enumeration Class

Each variant choice in a Simulink® model is associated with a conditional expression called a variant control. The variant control that evaluates to true determines the active variant choice in the model. This example shows how to create variant controls in your model using an in-memory enumeration class. The enumeration is created using the Simulink.defineIntEnumType function. You do not need to save the enumeration in a MATLAB® file. In code generation, enumerated types improve readability because condition values are represented as meaningful names instead of literal values.

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Create Variant Controls Using MATLAB Enumeration Class

Each variant choice in a Simulink® model is associated with a conditional expression called a variant control. The variant control which evaluates to true determines the active variant choice in the model. This example shows how to create variant controls in your model using a MATLAB® enumeration in the variant condition expressions. In code generation, enumerated types improve readability because condition values are represented as meaningful names instead of literal values.

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Generate Code from an Export Function Model

Simulate and generate code for an export function model.

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Generate Code from Variant Blocks with Startup Activation Time

Simulate and generate code for variant blocks with startup activation time.

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Generate Code from Nested Variant Subsystem with Code Compile and Startup Activation

Illustrates how code compile and startup variant activation time can be used together in two nested variant subsystems.

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Compile Code Conditionally for All Values of Variant Parameters with Same and Different Dimensions

Generate a C code that contains all the active and inactive values of variant parameters. The values are enclosed in preprocessor conditionals #if and #elif that enables you to compile the code conditionally based on the condition that evaluates to true.

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Run Executable for Different Variant Parameter Values Without Recompiling Code

Generate an executable that runs for different set of variant parameter values without needing to recompile the code for each set of values.

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Improve Code Readability of Variant Parameters Using Enumerated Types

You can use enumerated types to improve code readability of variant control values in variant parameters. Simulink 枚举 improve readability because enumerated types of variant controls values are represented as meaningful names instead of integers in the generated code.

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Reuse Variant Parameter Values from Handwritten Code Using Simulink.Parameter Variables

Use Simulink.Parameter variables to generate a code that imports variant parameter values from your existing code. Importing variant parameter values allows you to reuse the values that your existing code defines. You can then integrate and compile the generated and existing code into a single executable. You can choose to generate a code that imports variant parameter values at the beginning of code compile, simulation-loop, or model startup phases of simulation and code generation workflows based on the activation time you specify. For more information, see Activate Variant During Different Stages of Simulation and Code Generation Workflow.

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