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1.3 The characteristics of embedded system
2. Real time response Most real-time systems are embedded systems, system relies on the hardware and real-time operating system RTOS closely, can in the limited time to make rapid response to external events; Secondly, in the embedded application, most systems has a good real-time performance, and embedded systems mostly with fast start-up characteristics.
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Hale Waihona Puke 1.2.1 Embedded system overview
Two important features of embedded system: 1. to the application as the center: embedded systems
should not be independent of the application. 2. is based on computer technology: computer system is
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1.2.1 Embedded system overview
From the application point of view to define, embedded system is a combination of software and hardware, and performs a specific function.
Other
Medical care
Consumer electronics
Telecom
Signal communication
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1.3 The characteristics of embedded system
1. Diversity Application of the embedded system is varied, have been widely applied to various fields of society. Embedded type of equipment has become increasingly diverse, there are a variety of processors and peripheral equipment support.
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1.1 Introduction
Embedded system is widely used, it becomes the one of the fastest developing fields. The study of embedded system has a very important practical significance
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1.3 The characteristics of embedded system
3. Robust and reliable At present, there are mainly two kinds of mechanisms to ensure the reliability of the system, one is the hardware mechanism, such as a hardware watchdog timer, it can be in the software of losing control of the system to normal operation; two is a software system, such as memory protection and reset mechanism. In order to improve the reliability of the system, embedded systems often use solid state storage, software is solidified in the memory chip, rather than stored in disk carrier in.
2. IEEE ( International Institute of electrical and Electronics Engineers ) for embedded system is defined by: embedded system is" used for control, monitor or assist the operation of equipment".
composed of software and hardware, the embedded system is no exception.
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1.2.2 Application of embedded system in the mainstream
Embedded product market share are as follows:
Embedded system overview
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Embedded system overview
1.1 Introduction 1.2 Embedded system overview 1.3 The characteristics of embedded system 1.4 Embedded systems architecture 1.5 Embedded development trend
This chapter introduces the definition of embedded system and system structure analysis of embedded system, status, prospects the development trend of the field.
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1.2 Embedded system overview
Definition 1. The computer is embedded into a larger, more special
object, form" embedded computer system", referred to as " embedded system ".
From a technical point of definition, it is take the application as the center, take the computer technology as the foundation, the software and hardware can be cut.