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
- The cost of microprocessors and micro-controllers becomes expensive analog components such as potentiates and capacitors with up/down buttons.
- It contains Processor,Memory,Serial ports,Peripherals,etc..,
MICROCONTROLLER MICROPROCESSOR
- Performance-Singletask Performance-Multiple task
- Hardware cost is Low Hardware cost is High
- Easy to replace Not easy to replace
- It is said as System On Chip It is said as Chip On System
- It consists of 8051 It consists of 8085,8086
- It is a CISC architecture 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
- Stand alone
- Network
- Mobile
LANGUAGES:
Embedded C,C++,JAVA,etc..,
It is a portable framework for test web applications. The programming languages are PHP, java.
SYNONYMS:
bed, 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:
- Compiler
- Interpreter
- Debugger
- Assembly
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 resources
- 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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