what is embedded system

Posted by linsonbenny on January 28th, 2020

                     EMBEDDED   SYSTEM

INTRODUCTION:

                Embedded system is a combination of Hardware,Software and Operating System(Real time operating system).It is designed for a specific function or functions within  larger system. eg:Mp3 players,ATM machines,Printers,Washing machine,Microwave ovens,etc...,

DEVICES:

  • Embedded system is based on Microcontroller and Microprocessor with external peripheral interface circuits.
  • 98% of Microprocessor are manufactured using Embedded system.
  • The Microprocessor and Microcontroller was developed in the early 1960,which is an integrated circuit chip fabricated from MOSFET(metal-oxide semiconductor field-effect transistors).
  • Microcontroller is designed by Intel in 1981,it find applications where a general prupose computer would be too  costly.
  • The cost of microprocessors and microcontrollers becomes expensive analog components such as potentiometers and capacitors with up/down buttons.
  • It contains Processor,Memory,Serial ports,Peripherals,etc..,
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MICROCONTROLLER:                                                        

     Performance-Single task, Hardware cost is Low,                      Easy to replace, It is said as System On Chip, It consists of 8051, It is a CISC architecture.

MICROPROCESSOR:

     Performance-Multiple task, Hardware cost is High,                                                          Not easy to replace, It is said as Chip On System, It consists of 8085,8086, It is a RISC architecture.

 

TYPES OF EMBEDDED SYSTEM:

  •  Small scale  ->8-16 bit
  •  Medium scale ->16-32 bit
  •  Large scale   ->32-64 bit

FUNCTIONAL REQUIREMENTS:

  •  Real time=>performs the task in defined time interval
  •  Stand alone=>it is less complex and simple
  •   Network=>like WAN,MAN,LAN and other protocols.
  •   Mobile =>it is a wide range sysytem.

LANGUAGES:

       Embedded C,C++,JAVA,etc..,

       It is a portable framework for test web applications. The programming languages are PHP, java.

SYNONYMS:

       Enroot, entrench, fix, impact, implant, ingrain, lodge, root.

EMBEDDED SYSYTEM DESIGN:

  Top down design

                  =>Requirement

                              ||

                  =>System Specification

                              ||

                  =>System  Architecture

                              ||

                  =>Components

                              ||

                  =>System Integration

  Bottom up design

       

TOOLS:

  • Editor=>it is used to write source code in c,c++ programming languages and saved in text file.
  • Compiler=>it is written in high level programming language.
  • Assembler=>convert human written code into machine language.
  • Debugger=>it eliminates the error.

CHARACTERISTICS OF EMBEDDED SYSTEM:

  • Sophisticated functionality
  • Real time operation
  • Low manufacturing cost
  • Low power consumption
  • Restricted memory

ADVANTAGES:

  • Small size and faster to load
  • More specific to one task
  • Easy to manage
  • Low cost
  • Spend less resource
  • Performance is good but only less resources are used

 

DISADVANTAGES:

  •   Difficult to upgrade
  •   Troubleshooting is difficult
  •   Nearly not scalable      
  •   Difficult to transfer data

 

APPLICATIONS OF EMBEDDED SYSTEM:

  •  Medical system  => Pace maker,Patient monitoring system,ICU.
  •  Office equipment =>     Printer,Copier,Fax.
  •  Tools          =>     Multimeter,Oscilloscope,GpS.
  •  Banking       =>      ATM,Statement printer.
  •  Transportation =>       Plans,Trains,Boats,Automobiles.
  •  Radar,Traffic signal light,Signalling system.

 

SYNTAX:

            void setup()

         {

             pinMode(ledpin,OUTPUT);

             serial.begin(9600);

          }

             void loop()

          {

              digitalWrite(ledpin,HIGH);

              delay();

              digitalWrite(ledpin,LOW);

              delay();

              serial.print();

          }

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linsonbenny

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linsonbenny
Joined: January 28th, 2020
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