"Embedding" means putting an external thing into a mature product, just like the early X86 computers. The CPU only has the functions of arithmetic unit and accumulator, and all chips need internal external bridges to extend the implementation.
Things like serial port are realized by the external serial port controller chip of 16C550/2. At present, this serial controller chip has already been integrated into CPU, and all PCs have graphics cards, while most embedded processors have LCD controllers, but in a sense it is equivalent to graphics cards.
In software, embedding is to select all applications in the customized operating system kernel, and download the kernel to ROM after compilation. In some special operating system kernels, the corresponding application components are selected to complete the "embedding" of software.
The prospect of embedded system
The application of embedded controller is almost everywhere: mobile phones, home appliances, cars, all have its traces. Embedded controller has the advantages of small size, high reliability, strong function, flexibility and convenience.
Its application has penetrated into industry, agriculture, education, national defense, scientific research, daily life and other fields, and played an extremely important role in promoting technological transformation, product upgrading, accelerating automation process and improving productivity in all walks of life.
Embedded computers far exceed all kinds of general-purpose computers in the number of applications. A general-purpose computer contains 5- 10 embedded microprocessors in its external devices. In manufacturing, process control, network, communication, instruments, meters, automobiles, ships, aviation, aerospace, military equipment, consumer products and other aspects, it is the application field of embedded computers.
Embedded system industry is a special computer industry, and its purpose is to make everything simpler, more convenient, more universal and more applicable. General-purpose computers have developed into functional computers and generally entered the society. The development goal of embedded computer is a special computer to realize "general computing", so it can be said that embedded intelligent chip is the "digital gene" that constitutes the future world.
Baidu Encyclopedia-Embedded Technology