Explanation of the concept of embedded system, definition of embedded system

The encyclopedia is very detailed, so I don't need to say more, hehe

1. Embedded system is simply a special computer system designed for specific applications.

2. The embedded system is different from the ordinary PC or notebook, and the external characteristics of the embedded system such as the external size, power consumption, macro guessing, and external adapter must meet the requirements and limitations of the application.

3. The software of the embedded system, including the operating system, is burned on a circuit board.

4. It uses a low-power x86 CPU, adopts a modular design, and is equipped with the most basic computer peripherals. This type of computer usually uses the Windows operating system.

5. The CPU of the embedded system can be: 4-bit, 8-bit, 16-bit, 32-bit.

6. Embedded systems are widely used.

7. The architecture of the embedded system.

8. The embedded system is more characterized by SoC, that is, the entire system is integrated on a chip, for example, ATMEL's ARM7 chip 91SAM7X128 256, etc.; Users can get an inexpensive yet powerful embedded system.

The embedded field is a relatively new space, and many technologies have not been around for a long time, and most people do not have the conditions to contact or enter the industry, and need to receive special training and professional guidance to understand the specific development process. Therefore, in order to enter the field of embedded system development, it is necessary to attend courses from some professional training institutions and look for opportunities to practice projects and increase project experience, only in this way can the gap between companies and job seekers be bridged.

Among the many mask training institutions, the Maker Academy took the lead in launching the embedded software engineer training project, and integrated the employment needs and plans of many enterprises, employment-oriented, skill-oriented, with the domestic top training environment and enterprise atmosphere norms, to improve the professional quality of students, starting from real cases, the introduction of internationally renowned manufacturers, institutions training products, and constantly develop training programs to meet the needs of enterprise talents, for the Chinese IT industry to train and deliver embedded software engineers, and other practical and comprehensive talents urgently needed in the IT industry.

1. Embedded system: is one"A dedicated computer system designed for specific applications that is fully embedded in the controlled device"According to the Institution of Electrical Engineers, an embedded system is control, monitoring or auxiliary equipment, machinery or equipment used in the operation of a factory. Unlike general-purpose computer systems such as personal computers, embedded systems typically perform predefined tasks with specific requirements.

Since embedded systems are designed for a specific task, designers are able to optimize them to reduce size and cost. Embedded systems are typically produced in large quantities, so individual cost savings can be scaled up by hundreds or thousands along with production.

2. The definition of embedded system can be understood in this way: embedded system is a system used to control or monitor large-scale equipment such as machines, devices, and factories. The generally accepted definition of embedded system in China is:

Application-centric, based on computer technology, software and hardware can be tailored, to adapt to the application system for function, reliability, cost, volume, power consumption and other strict requirements of the special computer system.

3. (1) The embedded system is user-oriented, product-oriented, and application-oriented, and it must be combined with specific applications to have vitality and more advantages. Therefore, the meaning of the above three aspects can be understood in this way, that is, the embedded system is closely integrated with the application, it has strong specificity, and must be reasonably reduced and utilized in combination with the actual system requirements.

2) The embedded system is the product of the combination of advanced computer technology, semiconductor technology and electronic technology and specific applications in various industries, which determines that it must be a technology-intensive, capital-intensive, highly dispersed, and innovative knowledge integration system. Therefore, to intervene in the embedded system industry, there must be a correct positioning. For example, the reason why PALM occupies 70% of the market in the PDA field is because it is based on personal consumer electronics, focusing on the development of graphical interfaces and multitasking; The reason why Wind River's VXWorks are used in the rover is because of its high real-time and high reliability.

3) The embedded system must tailor the software and hardware according to the application requirements to meet the function, reliability, cost, volume and other requirements of the application system. Therefore, if a relatively general software and hardware foundation can be established, and then a system adapted to various needs can be developed on it, it is a better model for the development of lead hail. The core of the current embedded system is often a microkernel with only a few ks to tens of k, which needs to be expanded or reduced according to the actual use, but due to the existence of the microkernel, this expansion can be carried out very smoothly.

In fact, the embedded system itself is a very broad term, and all the control systems with embedded characteristics combined with the product can be called embedded systems, and sometimes it is difficult to give it an accurate definition. Nowadays, when people talk about embedded systems, to a certain extent, they refer to the embedded systems with operating systems, which have been relatively hot in recent years, and this point of view is also used in the analysis and outlook of this paper.

Definition: Embedded system is an application-centric, computer technology-based, software and hardware can be tailored, suitable for the application system has special requirements for function, reliability, cost, volume, power consumption and other aspects of the special computer system.

Features: (1) Embedded systems are application-oriented. The CPU in the embedded system is specially designed for specific applications, with the characteristics of low power consumption, small size, high integration, etc., which can integrate many of the tasks completed by the board in the general-purpose CPU into the chip, which is conducive to the miniaturization of the whole system design.

2) Embedded systems involve various industries such as advanced computer technology, semiconductor technology, electronic technology, communication and software. It is a technology-intensive, capital-intensive, highly dispersed, and innovative knowledge integration system.

3) The hardware and software of embedded systems must be highly customizable.

4) The life cycle of an embedded system is quite long. The embedded megavertical system is organically combined with the specific application, and its upgrading is also carried out simultaneously with the specific product.

5) The embedded system itself does not have the ability to further develop on it. After the design is completed, if the user needs to modify the program functions, it must use a set of special development tools and environments.

6) In order to improve the execution speed and system reliability, the software in the embedded system is generally solidified in the memory chip or microcontroller, rather than stored in the disk and other carriers. If you want to know more about embedded, you can just go and see Zhu Youpeng's free**, everything about embedded has been talked about.

The embedded system is application-centric, based on computer technology embedding, and the software and hardware can be tailored, which is suitable for the application system to have strict requirements for function, reliability, cost, volume, and power consumption. It is generally composed of four parts: embedded microprocessor, peripheral hardware devices, embedded operating system, and user applications, which are used to realize functions such as control, monitoring, or management of other devices.

Often, people tend to ignore the embedded systems around them - such as mobile phones, ATMs or elevators, etc., which exist in these ubiquitous devices, and sometimes people often use small computer systems embedded in cars, elevators, PDAs, program-controlled switches, etc., without realizing it. In addition, embedded systems often play a more important role in industrial robots, medical devices, satellites, flight systems, and more. Exactly"Invisible"with"Everywhere"This is what sets the embedded computer system apart from the traditional computational air-liquid scale system.