48868330 Modified New Embedded Systems

7/28/2019 48868330 Modified New Embedded Systems

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Embedded System In Industrial ViewEmbedded System In Industrial View

Accel IT Academy, Chennai.Accel IT Academy, Chennai.


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AgendaAgenda

Embedded SystemsEmbedded Systems

Domains of Embedded SystemsDomains of Embedded Systems

Building Blocks of Embedded Systems through an applicationBuilding Blocks of Embedded Systems through an application


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Embedded SystemsEmbedded Systems


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What is an Embedded System?What is an Embedded System?

ItIt isis thethe combinationcombination ofof hardwarehardware andand softwaresoftware forfor somesome controlcontrol

specificspecific applicationapplication

FormsForms aa componentcomponent ofof aa largerlarger systemsystem

ExpectedExpected toto functionfunction withwith minimalminimal humanhuman interventionintervention

IsIs aa realreal timetime systemsystem


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Do we need Embedded Systems?Do we need Embedded Systems?

The world needs SYSTEMSThe world needs SYSTEMS

PredictabilityPredictability -- Should respond in a predictable way to unpredictableShould respond in a predictable way to unpredictablesituationssituations

Fault TolerantFault Tolerant -- Should continue operations despite the presence ofShould continue operations despite the presence ofhardware and/or software faultshardware and/or software faults

SafetySafety -- Should avoid physical or economic damage to person &Should avoid physical or economic damage to person &propertyproperty


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Embedded SystemsEmbedded Systems --

Building BlocksBuilding Blocks

Micro Processors / Micro Controllers.Micro Processors / Micro Controllers.

Advance C / Embedded C / Assembly Programming.Advance C / Embedded C / Assembly Programming.

Bus Standards.Bus Standards.

PCB Design.PCB Design.

RTOS.RTOS.

Networking.Networking.

Device Drivers.Device Drivers.


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Micro Processors / Micro Controllers.Micro Processors / Micro Controllers.

A microprocessor is a general purpose central processing unit ofA microprocessor is a general purpose central processing unit ofa digital computera digital computer

A chip on a computerA chip on a computer

E.G. Intel 8086, Intel 80186 , etcE.G. Intel 8086, Intel 80186 , etc

A micro controller is a true computer on a chipA micro controller is a true computer on a chip

A computer on a chip.A computer on a chip.

E.G intel 8051, PIC 16F873E.G intel 8051, PIC 16F873


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Micro Processor versus Micro ControllerMicro Processor versus Micro Controller

MicroprocessorMicroprocessor

general purpose CPUgeneral purpose CPU

a chip in a computera chip in a computer

Are built on Von Neumann architecture.Are built on Von Neumann architecture. e.g. Intel x86/ Motorola 680x0 familiese.g. Intel x86/ Motorola 680x0 families

MicroMicro--ControllerController

true computer on a chip.true computer on a chip.

Are built on Harvard architecture.Are built on Harvard architecture.

e.g. Intel 8051, 80196/ Motorola 68HCxx familiese.g. Intel 8051, 80196/ Motorola 68HCxx families


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Advance C / Embedded C / Assembly Programming.Advance C / Embedded C / Assembly Programming.


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Assembly language programmingAssembly language programming

AdvantageAdvantage

Assembly Language programming is the efficient programmingAssembly Language programming is the efficient programming

language for accessing the hardware.language for accessing the hardware.

The assembly language op codes directly work on the targetThe assembly language op codes directly work on the target

machine so it is faster in operationmachine so it is faster in operation

DisadvantageDisadvantage

Tough to understand and Program.Tough to understand and Program.


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Advance CAdvance C

Ways of accessing the hardware through CWays of accessing the hardware through C

Using runtime library functions, getch( ).Using runtime library functions, getch( ).

Using ROMUsing ROM--BIOS functions.BIOS functions.

Using DOS functions.Using DOS functions.

Directly programming the hardwareDirectly programming the hardware


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Embedded CEmbedded C

Why Embedded C ?Why Embedded C ?

Easy control of multilevel functionsEasy control of multilevel functions

ModularityModularity

Easy maintenanceEasy maintenance

Reusable codesReusable codes

PortablePortable

Minimal hardware knowledge requiredMinimal hardware knowledge required


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Real Time SystemsReal Time Systems -- TypesTypes

Hard real timeHard real time -- Systems with Hard DeadlinesSystems with Hard Deadlines

no Critical Deadlines can be missedno Critical Deadlines can be missed

E.g. Control Systems of Aircraft,Atomic ReactorsE.g. Control Systems of Aircraft,Atomic Reactors

Soft real timeSoft real time -- Timing Constraints a little tolerableTiming Constraints a little tolerable

occasional misses are permittedoccasional misses are permitted

the average response time for an event should be within athe average response time for an event should be within a

specified timespecified time

E.g.Weather Monitors, Vending MachinesE.g.Weather Monitors, Vending Machines


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QQC/OSC/OS--IIII

High performanceHigh performance

DeterministicDeterministic

ROMableROMable

ScalableScalable

Portable to different processorsPortable to different processors

Low costLow cost


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A quick look at TCP/IP NetworkingA quick look at TCP/IP Networking

Internetlayer

Network

Application

Applicationlayer

Transportlayer TCP UDP

IP ARPRARP

NetworkAccess layer

Token ringEthernet

Physical network

either ?

Internetlayer


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DEVICE DRIVERSDEVICE DRIVERS


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Documents

48868330 Modified New Embedded Systems