DTMF BASED MOBILE PHONE CONTROLLED ROBOT
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INTRODUCTION TO EMBEDDED SYSTEMS
Each day, our lives become more dependent on 'embedded systems', digital information technology that is embedded in our environment. More than 98% of processors applied today are in embedded systems, and are no longer visible to the customer as 'computers' in the ordinary sense. An Embedded System is a special-purpose system in which the computer is completely encapsulated by or dedicated to the device or system it controls. Unlike a general-purpose computer, such as a personal computer, an embedded system performs one or a few pre-defined tasks, usually with very specific requirements.


DEFINITION OF EMBEDDED SYSTEM
Embedded system is defined as, For a particular/specific application implementing the software code to interact directly with that particular hardware what we built. Software is used for providing features and flexibility, Hardware = {Processors, ASICs, Memory,...} is used for Performance (& sometimes security)



Overview of an Embedded System Architecture
Every Embedded system consists of a custom-built hardware built around a central processing unit. This hardware also contains memory chips onto which the software is loaded.


TYPES OF EMBEDDED SYSTEMS
Based on functionality and performance embedded systems categorized as 4 types
1. Stand alone embedded systems
2. Real time embedded systems