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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