EMBEDDED SYSTEM - BASICS

SYSTEM - An arrangement in which units are assembled in such a way that, the units work according to a plan or program.

EMBEDDED SYSTEM - Is a system in which the units, hardware and software are embedded in the system such a way that they are dedicated for a particular application or they are a part of a large system.

An embedded system contains 3 important components
1.Hardware - Power supply, reset circuits, processor, program memory, data memory, input and output device interfacing/driver circuits, serial communication ports, timers are some of the components of hardware.

2.Software - This performs a series of tasks or processes for the application.

3.RTOS(real time OS) - This supervises the application software that performs tasks on hardware components based on priorities of tasks of the system.

CHARACTERISTICS OF AN EMBEDDED SYSTEM

1. Real time & multirate operations is the way system works, react to events, interrupts and schedules the system functioning.

2. Complex algorithms.

3. Complex GUI(graphical user interfaces) and other interfaces.

4. Dedicated functions.

CONSTRAINTS WHEN BUILDING AN EMBEDDED SYSTEM

1. Available system memory
2. Available processor speed.
3. Control on power dissipation.