embedded software development

Embedded System

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What We Will Cover?

IntroductionHistoryTypes of Embedded SystemCharacteristicsFeaturesAdvantages

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Introduction -

An embedded system is a computer system with a dedicated function within a larger mechanical or electrical system, often with real-time computing constraints. It is embedded as part of a complete device often including hardware and mechanical parts. Embedded systems control many devices in common use today.

Definition

Hard to DefineComputing Systems embedded within electronic devicesNearly any computing system other than a desktop computer

How does an Embedded system differ from computer system?An Embedded system is a specific to a application, whereas a computer system is generic.

Though the components are same there is substantial difference in them.

A personal computer is not designed to perform a specific function, rhather it is able to do many things.

The essential difference is that a computer when manufactured is in blank state, the manufacturer does not know what the customer will do with it, while an Embedded system is application specific.

An Embedded system is a component within some large systems

If required each of the embedded systems are connected by a sort of a communication network.

Numerous embedded systems make up the computer system.

Embedded System - History

Embedded System - History

Embedded System - Classification

Embedded System - Classification

Embedded System - Characteristics

Embedded System - Characteristics

It is designed to do some particular task.

Embedded systems are not always standalone devices.

The program instructions written for embedded systems are referred to as firmware and are stored in ROM or flash memory chips.

Features of Embedded Software

Features of Embedded SoftwareTimeliness - Even infinitely fast computer embedded software needs to deal with time because the physical processes with which it interacts evolves over time.

Concurrency - Engage with the physical world where multiple things happen at once.

Liveliness - Program must not terminate or block waiting for events that will never occur.

Heterogeneity - Different computational styles and implementation technologies interact with events occurring.

Reactivity - React continuously to the environment at the speed of the environment.

Reliability and security - The system must be reliable and secure against errors.

Interaction with physical devices - The communication of embedded systems is performed through unusual i/o devices that sometimes require signal conditioning.

Robustness - The conditions of the embedded systems operation may be adverse, so they must be as robust as possible.

Advantages of using Embedded Software

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Low costSmall sizeHigh reliabilityFast operationsEasy to manufactureFewer interconnectionsPortable, such as digital watches, mp3 player, etcReal time responseNo user interfaceNot much data storage

Embedded LanguagesC has been the language of the embedded programmers. It is fairly simple to learn, compilers are available for almost every processor in use today.C which is considered as a middle level language having both the constructs of the low-level as well as high-level, has all the rich features in it that makes it the choice of the embedded programmers.C is not the only language used by embedded programmers there are other languages like

Assembly languageC++Ada

These languages though exists did not gain popularity as C.

Embedded System Hardware

Hardware for Embedded System

Hardware products for National Instruments embedded systems share a common architecture that includes three components: an embedded controller for communication and processing; an FPGA for advanced control, timing, signal processing, filtering, and custom protocols; and industrial I/O modules for connectivity to any sensor or device. All of the components are reconfigurable through a single software toolchain.

Embedded Systems - Applications

Embedded Systems - Applications

References

https://en.wikipedia.org/wiki/Embedded_systemhttp://www.deligence.com/services/embedded-software-developmenthttp://www.slideshare.net/kondalarao7/embedded-systems-9301887

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