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Operating Systems: Internals and Design Principles,
6/E William Stallings
Chapter 13 Embedded Systems
Dave Bremer
Otago Polytechnic, N.Z.
©2008, Prentice Hall
Roadmap
• Embedded Systems
• Characteristics of Embedded Operating Systems
• eCos
• TinyOS
Embedded System
• One of the most important and widely used categories of operating systems
• Hardware and software designed to perform a dedicated function
• Tightly coupled to their environment
• Often, embedded systems are part of a larger system or product,
– E.G. antilock braking system in a car.
Real Time
• Embedded systems are tightly coupled to their environment.
• This imposes real-time constraints by the need to interact with the environment.
– required speeds of motion,
– required precision of measurement, – required time durations.
Examples of Embedded Devices
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