cs [45]163: embedded systems
TRANSCRIPT
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CS [45]163: Embedded Systems
Andrew H. FaggSymbiotic Computing Laboratory
School of Computer ScienceUniversity of Oklahoma
Teaching Assistant: Di Wang
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Andrew H. Fagg: Embedded Real-Time Systems: Introduction
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What is an Embedded System?
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What is an Embedded System?
• Computing system with a non-standard interface (often no keyboard or screen)
• Often involved in sensing and control (and may not even talk to a human)
• Typically a custom system for a very specific application
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What is an Embedded System?(cont)
• Limited processing capabilities:– Can be extremely small– Can require a small amount of power
• Can have significant real-time constraints– Act on inputs very quickly– Generate high-frequency outputs
• Often a higher expectation of reliability
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Examples of Embedded Systems
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Robotics
Mark TildenLos Alamos
National Labs and Wowwee
picture from Robosapiens
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Humanoid Robotics
NASA/JSC Robonaut UMass Torso
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Dual-Limb Coordination
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Personal Satellite Assistants
NASA Ames Research Center
picture from Robosapiens
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Wearable Computing
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Intelligent Prosthetics
Hugh Herr MIT Leg Lab
picture from Robosapiens
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Sensor Networks
1000 sensor nodes
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Embedded Systems Challenges
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Embedded Systems Challenges
• Sensing the environment:– Sensors are typically far from ideal (noise,
nonlinearities, etc.)– Sensors fail– Hard to get a ‘complete’ view of the
environment• Affecting the environment through
“actuators”– Application can require fast, precise
responses
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Embedded Systems Challenges(cont)
• Testing/debugging can be very difficult: – Hard to identify and replicate all possible situations– Often involves the interaction of many different
components– Often no standard user interface– Limited on-board resources with which to record
system state
• Competing requirements of cost, complexity, design time, size, power…
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Embedded Systems Challenges(cont)
• Lack of reliability can be a killer ….. literally
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My Assumptions About You
• Background in Computer Organization and Operating Systems
• Programming in C
• Everyone has a laptop that can be used for the projects
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Skills You Should Learn Here
• Read (and understand!) technical documentation
• Design and implement embedded systems involving a microcontroller, sensors, actuators, and the necessary “glue”
• Design, program, and debug embedded software for sensing and control
• Work in collaborative teams
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Sources of Information• Required textbooks:
– Designing Embedded Hardware, John Catsoulis, O'Reilly, 2005, 2nd Edition, ISBN: 0-596-00755-8
– (optional) Embedded C Programming and the AtmelAVR, Richard H. Barnett, Sarah Cox, Larry O'Cull(2006), 2nd Edition, Thomson/Delmar Learning, ISBN: 1418039594
– Also reading the Atmel Mega 8 specification (downloadable)
• Class web page: www.cs.ou.edu/~fagg/classes/ame3623_s07/• Desire2Learn: learn.ou.edu
You are responsible for making sure that you have access to all of these resources
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(available at the Engineering Library)
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Class Schedulewww.cs.ou.edu/~fagg/classes/embedded_systems_2008/schedule.html
• Lecture plans• Required reading
As changes are made, they will be posted here
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Channels of Communication
• Lecture• Class email list: time-critical messages to
the class• Desire2Learn announcements• Desire2Learn discussion group: you may
post questions (and answers) • Private email or office hours for non-public
questions/discussions