Componentbased software engineering for embedded systems

1
Component-based software engineering for embedded
systems

• -Rajrupa Ghosh

2
Outline

• Component
• Component Based Software Engineering
• Main Principles of CBSE
• CBSE for Embedded Systems
• Advantages of using CBSE for Embedded Systems
• CBSE Models

3
What is a component?

• A software component is
• basic units of encapsulated behavior
• with contractually specified interfaces
• and explicit context dependencies only
• A software component
• can be deployed independently
• it is subject to composition by third party

4
Component-based Software Engineering

• Software is structured into components and
  systems are constructed by composing and
  connecting these components

5
Main Principles of CBSE

• Reusability
• Substitutability
• Composability
• Extensibility
• -Extending components that are part of a
  system
• -Increase the functionality of individual
  components

6
What are embedded systems

• A computer system that is part of a larger
• system and performs some of the requirements
  of that system

7
Central Technical Concepts

• Software components
• - well specified interfaces, unnecessary
  functionality removed,
• scarcer usage of resources,
  memory consumptions, reliability, stability,
  dependability
• Component Models
• - Impose design restrictions to make systems
  more predictable with respect to important
  properties in the domain
• Component Frameworks
• - runtime systems that supports components
  execution by
• handling component interaction
  and invocation
• - light weighted and use predictable
  mechanisms
• Component Technology
• -Concrete implementations of component models and
  frameworks
• Eg. COM, EJB, .NET

8
Advantages

• Reduced development time
• component reuse
• parallel development of components
• Maintainance well supported
• Adding new or upgrading existing components
• Extendable interfaces of components
• Enhanced testing and debugging
• Unit testing
• Monitor interfaces to ensure correct behavior

9
Widely used component models for embedded systems

• Telecommunications industry- Corba
• Process industry- COM/DCOM, .Net
• Added functionalities- OPC (OLE process control
  Foundation)

10
References

• http//www.mrtc.mdh.se/publications/0838.pdf
• www.snart.org/conference/2004/ Ivica-PresentationS
  nartSeminar2004.pdf
• http//www.cis.ksu.edu/jung/Publications/dwyer-al
  .savcb03.pdf
• Component Based Software Engineering Putting the
  Pieces Together by George T. Heineman, William T.
  Councill

11

• Questions?