Generative Techniques for Real-Time Embedded Systems

1
Generative Techniques for Real-Time Embedded
Systems

• David Sharp
• david.sharp_at_boeing.com
• The Boeing Company
• St. Louis, Missouri

2
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
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
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
Commands
Display Surfaces
Display Formats
Cockpits
Model
Real World Model
Missiles
Ballistic Weapons
Ground Points
D e p e n d e n c i e s
Steering
Airframe
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
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
ltconfiggt ltprocessorgt ltlayergt ltcomponentgt lt/compo
nentgt lt/layergt lt/processorgt lt/configgt
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