NDLI: Software portability gains realized with METAH and Ada95

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Volume XXII, Issue 4, December 2002

User experiences with the Aonix ObjectAda RAVEN

Experiences report on the implementation of EPTs for GNAT

Practical implementations of embedded software using the Ravenscar Profile

Software portability gains realized with METAH and Ada95

Using Ravenscar to support fault-tolerant real-time applications

Precise response time analysis for Ravenscar kernels

Modeling and schedulability analysis in the development of real-time distributed Ada systems

Protected ceiling changes

Accessing delay queues

Application-defined scheduling in Ada

Language issues of compiling Ada to hardware

Asynchronous transfer of control in the real-time specification for java™

Session summary

Session summary

Session on real-time, fault tolerance, and distribution

Report of session

Session summary

Session summary

Volume XXII, Issue 3, September 2002

Volume XXII, Issue 2, June 2002

Volume XXII, Issue 1, March 2002

Software portability gains realized with METAH and Ada95

Content Provider	ACM Digital Library
Author	Lewis, Bruce
Abstract	MetaH is an Architecture Description Language (ADL) developed to express and evaluate the software architecture of avionics and flight control systems. It is intended for not only description and analysis, but also for integration of the software components on the specified embedded hardware. This automated composition to specification with glue code generation allows rapid development and evolution of real-time embedded mission and safety critical systems. It also provides very high portability in these complex systems for software application code across various execution environments. This is accomplished by leveraging language and O/S standards, minimizing component dependencies, and by constructing component timing relationships to specification across differing execution platforms.This paper describes MetaH and provides the results of porting a highly time sensitive application across significantly different embedded hardware/software execution environments. We initially developed a reusable MetaH specification for missile architectures, populated it with software components reengineered from a production missile system, and executed it on single and dual i80960MC target configurations. We then retargeted this application to single and dual Pentium target configurations; and to a single PowerPC configuration. We compare the costs of these exercises with estimated costs to do the same tasks using traditional methods.In each of these cases the high portability and supported functionality of Ada95 was a significant enabler. Current trends say that future avionics systems and perhaps other safety critical applications will require space and time partitioning. Should Ada95 and the Ravenscar profile support these capabilities?
Starting Page	37
Ending Page	46
Page Count	10
File Format	PDF
ISSN	10943641
DOI	10.1145/584417.584423
Journal	ACM SIGAda Ada Letters (ALET)
Volume Number	XXII
Issue Number	4
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1989-04-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article

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