A Paper Presentation on Embedded Systems www.powerpointpresentationon.blogspot.com

Embedded System ???...... Hardware is driven and controlled by software Software runs in a computer system (usually a micro-controller) Preprogrammed to do specific function Let us look into some examples……

Microcontroller based lock Thermostat controller Pacemaker

Applications Communications Automotive automatic braking Military applications – Missile guidance systems Industrial applications Robotics

System organization

Embedded system design requirement Computer design requirement System-level requirement

Computer design requirement Real time/reactive operation Small size, low weight Safe and reliable Harsh environment Cost sensitivity

System-level requirement End product utility System safety and reliability Controlling physical systems Power management

Software design issues Round robin scheme Loop: Await tick; Read S1;take action(S1); Read S2;take action(S2); Read S3;take action(S3); Forever

Concurrent Programming

QNX-RTOS Features: Micro kernel architecture Message based interprocess communication

PROCESS RUNNING READY WAITING EVENT BLOCKED

Synchronous Programming 3 Level Architecture: Interactive I/O interface Reactive kernel Data management

Future Possibilities More and more produced processors are used in embedded devices New applications like pervasive computing are emerging

REFERENCES Book(s): Website(s): Embedded microcomputer system- real time interfacing : Jonathan W. Valvano Website(s): 1.http://www.cs.cmu.edu 2.http://www.embedded.com 3.http://www.esterel.org 4.http://www.qnx.com

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