Introduction To Embedded Systems

Introduction To Embedded Systems

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Introduction to ES

What is an Embedded System? It is basically a computing system,which forms a part of larger system and performs a dedicated function

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Introduction to ES

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Examples:Cars Washing Machine Satellites Telephones Embedded Systems are real 17-12-timed System Lekshmi #316 2003

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Introduction to ES

Real time Systems A real time systems are the one in which the correctness of the system not only depends on the results computed but also on the time at which the results are made available.

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Introduction to ES

Real time system are of two types Hard Real Time Systems. Soft Real Time Systems.

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Introduction to ES

Hard Real Time Systems A hard time real time system is the one in which response time is critical.If it fails to response at that time ,the system is considered to have failed. eg:- Rockets Launching

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Introduction to ES

Soft Real Time Systems Soft real time systems is the one which can tolerate some delay eg:- Laser Printer.

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Introduction to ES

Characteristics Of Embedded System External Interface Physical constraints Environmental Conditions.

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Introduction to ES

Embedded System Categories

Control Systems egs:Satellites Signal Processing egs:Radar Communications egs:Telephones General Computing 17-122003

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Introduction to ES

Embedded System Development Process

Embedded SystemDevelopmentProcess consists of designing Hardware Software

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Introduction to ES

Hardware Constr aintscost, power etc

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Embedded System

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Requireme ntsaccuracy,r eliability etc

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Introduction to ES

Hardware Developing Process got the following steps… Selection of CPU Memory Peripherals

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Introduction to ES

Selection Of CPU Processors are selected based on the requirements of the larger device of which embedded system is a part Egs:In automatic washing machines

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Introduction to ES

Memory Programs are stored in memory devices lke ROM,RAM.

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Introduction to ES

Peripherals I/O devices connected to embedded systems egs:- A/D & D/A converters

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Introduction to ES

Software Development Process The software in the embedded system is usually called as firmware Next question is whether to use an RTOS or not…

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Introduction to ES

Embedded System in car Cdplayer wipper

Fuel Monitoring

Fuel injection

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Introduction to ES

Advantages Automatic Error Occurance is lowered Concurrent activities can be done 17-122003

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Introduction to ES

Disadvantages Safety critical operations Cost effective

17-122003

Lekshmi

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Introduction to ES

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Reference

www.microsoft.com www.iturls.com www.intelligraphics.com www.microcontrollers.com Kaithiri-Malayala manorama(12/12/03) The Hindu -Business Report. 17-12Lekshmi #316 2003

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Introduction to ES

Thank You! 17-122003

Lekshmi

#316