Computer system with specific control functions within a larger system, generally with real-time computing constraints is called an Embedded System. As a part of complete device generally including hardware and mechanical parts, this software is embedded. Completely opposite to a computer design such as a personal computer which is designed to be flexible and to offer an extensive range of end-user needs. In common use nowadays, embedded software control many devices.
Microcontrollers or digital signal processors (DSP) are the processing core that embedded software contains. In embedded software development, a processor is considered as the most important unit in the hardware. The processor can be described as the heart of this software.
Dedicated in handling a particular task is the key characteristic of this software. To increase the reliability and performance, reduce the size and cost of the product, design engineers can optimize it since the embedded software is dedicated to specific tasks. Benefiting from economic scale, many embedded systems are bulk-produced.
From digital watches, MP3/MP4 players, to large stationary installation including traffic lights, and factory controllers, embedded software range from portable devices, physically. High level multi units to single microcontroller chip, complexity of this software varies from low.
From consumer market to industrial, commercial and military applications, embedded systems are widespread. For the network to mobile, telecommunications systems show many engagements with numerous embedded systems from telephone switches. Dedicated routers and network bridges support computer networking to route data. Embedded systems are also widely used in transportation systems including flight to automobiles. Some advanced avionics such as inertial guidance systems and GPS receivers that have sensitive safety requirement in modern airliners and commercial jets.
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