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1 嵌入式代码自动生成周玲 / Ling.Zhou@mathworks.cn 应用工程师 The MathWorks, Inc. 1

2 目录代码生成概述代码结构控制模型数据管理代码生成的优化代码生成相关 2

3 目录代码生成概述代码结构控制模型数据管理代码生成的优化代码生成相关 3

4 BLACK BOX P O W E R V R C S I N P U T B L U E G R E E N R E D 核心算法的代码自动生成 Communication Interfaces Comm Drivers Core Software Algorithms and Logic Output Drivers M Actuators Sensors A B C Input Drivers Special Device Drivers RGBSplit-4 Special Interfaces CCP ASAP2 Most Development is on Core Software Algorithms Scheduler/Operating System And Support Utilities 4

代码量的爆炸式增长 Estimated Source Lines of Code (LOC) Today s powertrain: 500,000 LOC Today s vehicles: 1,000,000 LOC 2015 vehicles: 100,000,000 LOC Management trends: High-level

end automotive embedded software has been exponential.

5 代码量的爆炸式增长 Estimated Source Lines of Code (LOC) Today s powertrain: 500,000 LOC Today s vehicles: 1,000,000 LOC 2015 vehicles: 100,000,000 LOC Management trends: High-level architectural planning Algorithm development with models Automatic generation of code from models Industry-wide standardization of interfaces and common functionality Growth of top end automotive embedded software has been exponential. Robert Gee Director of Strategy for Motorola Automotive No longer possible to validate and verify functionality by brute force testing alone. Jim Kolhoff Director of Software Engineering at GM Powertrain Automotive Engineering, Managing for Software Success Aug 2006 sae.org/automag/electronics/ / pdf 5

6 使用更高效的算法开发平台 6

7 代码自动生成 7

8 代码自动生成工具 Embedded Coder Embedded Coder Generate C and C++ from MATLAB and Simulink optimized for embedded systems Simulink Coder Simulink Coder Generate C and C++ from Simulink and Stateflow MATLAB Coder MATLAB Coder Generate C and C++ from MATLAB 8

9 代码自动生成已成为行业趋势 Click for User Story 9

10 代码自动生成基本流程模型被充分测试验证以后 : 运行 Model Advisor 配置代码生成选项生成代码查看代码报告代码测试 10

11 示例 - 简单滤波器算法的代码生成 11

12 示例 - 代码生成报告 Hyperlink between code and model. Hyperlink within C code files. 12

13 示例 - 可配置的代码生成 13

14 目录代码生成概述代码结构控制模型数据管理代码生成的优化代码生成相关 14

15 默认入口函数原型 <model>_initialize() initialize signals, states and parameters prior to first time step <model>_step() execute one time step <model>_terminate() Optional. Cleanup after last simulation step. 15

16 可配置入口函数原型 16

17 子系统生成单独函数 Virtual Atomic 17

18 被多次引用的子系统代码重用 18

19 参数化调用被引用模型 19

20 代码生成文件控制 20

21 目录代码生成概述代码结构控制模型数据管理代码生成的优化代码生成相关 21

22 Simulink 里的数据 Data in Simulink Data characteristics Signal Parameter State Memory size Storage class Organization Data type External Internal Scalar Array Bus Built-in Local Global Reusability Format exportability Float Integer Fixed-point Precision Word size Signed/unsigned Word size Signed/unsigned Scaling 22

23 定义数据类型 23

24 定义存储类型 model.c model_private.h 24

25 算法模型与数据保持独立 Description Name Value Data type Storage class Rest of model (algorithm, system dynamics, etc.) 25

26 定义数据对象关联模型数据 Simulink Data Objects which specify characteristics data type, dimensions Signals States parameters Source of data (M-files or MAT-files) Data Algorithm 26

27 自定义信号的存储类型 Create a signal data object. Use the object name to label a signal in the model. Indicate the signal must resolve to a signal data object. 27

28 自定义参数的存储类型 Create a parameter data object. Use the parameter as a block parameter in the model. Enable Inline parameters in the model s configuration parameters. 28

29 目录代码生成概述代码结构控制模型数据管理代码生成的优化代码生成相关 29

30 代码生成统计报告 30

31 移除不需要的代码或数据支持 Removing initialization code (Optimization pane) Removing termination code (Interface pane) Removing data support (Interface pane) Disabling MAT-File Logging (Interface pane) Conditional Input Branch Execution (Optimization pane) No termination function 31

优化数据存储结构 Signal Storage Reuse (Signals and Parameters pane) Enabling Local Block Outputs (Signals and Parameters pane) Reusing Block Outputs (Signals and Parameters pane) Expression Folding (Signals

32 优化数据存储结构 Signal Storage Reuse (Signals and Parameters pane) Enabling Local Block Outputs (Signals and Parameters pane) Reusing Block Outputs (Signals and Parameters pane) Expression Folding (Signals and Parameters pane) Reusing Global Variables (Signals and Parameters pane) Inlining Parameters (Signals and Parameters pane) Block Reduction (Optimization pane) Boolean Logic (Optimization pane) 32

33 代码优化工具 33

34 目录代码生成概述代码结构控制模型数据管理代码生成的优化代码生成相关 34

35 其它话题 Scheduler Multi-rate Multi-tasking Optimizing Code Customer Code Integration Customer Storage Class Target Language Compiler AUTOSAR Support Learn more from MathWorks Training Service - Embedded Coder for Production Code Generation (3 days) 35

36 MathWorks 在中国的技术支持体系在中国提供多层次的技术支持应用工程师 : 负责产品层面的支持, 有丰富产品和行业知识 Pilot 工程师 : 结合用户实际项目, 提供指导支持, 有实际项目经验同时对工具链熟悉技术咨询顾问团队 : 全部是行业和产品专家, 有着丰富的实际项目经验, 目前主要在北美和欧洲, 服务于全球, 在中国已经开始建立团队培训服务 : 提供公开课和现场的收费培训, 可以针对行业定制技术支持热线 : 对服务期内正版用户提供 5 8 的电话技术支持 36

37 联系我们官方网站 : 官方微博 : MATLAB 官方社区 ( 英文 ): 中文社区 : 联系电话 ( 总机 ): 联系地址 : 迈斯沃克软件 ( 北京 ) 有限公司北京市海淀区科学院南路 2 号融科资讯中心 C 座南楼 3 层 301 迈斯沃克软件 ( 北京 ) 有限公司上海分公司上海市浦东新区竹林路 101 号陆家嘴基金大厦 1702 单元 37

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2/80 2 2/80 2 3/80 3 DSP2400 is a high performance Digital Signal Processor (DSP) designed and developed by author s laboratory. It is designed for multimedia and wireless application. To develop application