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Generative Techniques for Real-Time Embedded Systems

Generative Techniques for Real-Time Embedded Systems

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Generative Techniques for Real-Time Embedded Systems

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  1. Generative Techniques for Real-Time Embedded Systems David Sharp david.sharp@boeing.com The Boeing Company St. Louis, Missouri

  2. ComponentFacade Component PatternStructure • Based on Façade Design Pattern* ComponentConsumer ComponentSupplier1 ComponentSupplier2 Shown in Unified Modeling Language *Gamma et al., Design Patterns: Elements of Reusable Object-Oriented Software

  3. ... ... Horizontal Sensors Vertical Sensors User API User API EGI ADC User API Configuration API Configuration API INS Configuration API Configurable Component PatternExample Reused User API Airframe ... Horiz. Substate Vertical Substate Rot. Substate Required Configuration API ... Rotational Sensors Optional Static Wiring Dependencies Project Specific

  4. AirframeFactory Airframe CreateHorizontalSubstate () : HorizontalSubstate* CreateVerticalSubstate () : VerticalSubstate* CreateRotationalSubstate () : RotationalSubstate* Configurable Component PatternImplementation (cont) • Abstract Factory Pattern* Defines Configuration Technique HorizontalSubstate VerticalSubstate RotationalSubstate 1..* 1..* 1..* 1..* 1..* 1..* HorizontalSensor VerticalSensor RotationalSensor *Gamma et al., Design Patterns: Elements of Reusable Object-Oriented Software

  5. Logical Architecture Overview Configurator System Configurator Layer Configurator Operator View Controller Cockpits Display Formats Display Surfaces Commands Model Real World Model Missiles Ballistic Weapons Ground Points D e p e n d e n c i e s Airframe Steering Earth Model Avionics Interfaces Radar INS GPS Building Blocks State Machines Distributors Infrastructure Services ORB Services Event Service Name Service Replication Service Persistence Service Scheduler Service I/O Service Time Service

  6. Project Specific Components OFP Production System Reuse Library Desired Pluggable Common Components Essential Common Components Project Library OFP Configurator Essential Project Specific Plug-ins OFPs Created Via Component Selection and Wiring

  7. Component Composition Methods • New System Development • Spreadsheet • Purdue Tool • XML-Based Tool • Model-Based Integration of Embedded Systems Program Tools (MoBIES) • Legacy System Upgrades

  8. Spreadsheet Tool Perl Script C++ Code

  9. Purdue Tool Graphical Viewer/Editor “Build Master” Code Generator Build Model C++ Code

  10. XML Based Tool <config> <processor> <layer> <component> … </component> </layer> </processor> </config> Table and Graphical Based Viewers/Editors

  11. MoBIES • New DARPA Program • Composition technologies for real-time systems • Multi-view modeling of cross-cutting properties • Scheduling, concurrency, distribution... • Meta-code generation • Framework integration Also “Program Composition for Embedded Systems” (PCES)- AOP for real-time systems

  12. Legacy Upgrades • “Incremental Upgrade of Legacy Systems” Program • Automated generation of C++ wrappers for legacy software • Using Honeywell MetaH toolset

  13. Lessons Learned • Need both tabular and graphical views • Key issues: • Simplicity • Scalability • Configuration management