19-09-2012, 11:55 AM
Embedded Systems In the Real World
Embedded Systems.pptx (Size: 1.42 MB / Downloads: 21)
Definition of an Embedded Computer
Computer purchased as part of some other piece of equipment
Typically dedicated software (may be user-customizable)
Often replaces previously electromechanical components
Often no “real” keyboard
Often limited display or no general-purpose display device
But, every system is unique -- there are always exceptions
Four General Embedded System Types
General Computing
Applications similar to desktop computing, but in an
embedded package
Video games, set-top boxes, wearable computers,
automatic tellers
Control Systems
Closed-loop feedback control of real-time system
Vehicle engines, chemical processes, nuclear power,
flight control
Signal Processing
Computations involving large data streams
Radar, Sonar, video compression
Communication & Networking
Switching and information transmission
Telephone system, Internet
Types of Embedded System Functions
Control Laws
PID control
Fuzzy logic, …
Sequencing logic
Finite state machines
Switching modes between control laws
Signal processing
Multimedia data compression
Digital filtering
Application-specific interfacing
Buttons, bells, lights,…
High-speed I/O
Fault response
• Detection & reconfiguration
• Diagnosis