Embedded System Study Notes (1)

Embedded Systems Definition
Defined by the Association of Electrical Engineers (IEE): embedded systems are devices used to control or monitor large-scale systems such as machines, devices, or factories.

The architecture of the embedded system can be divided into four parts: Embedded Processor, embedded peripheral equipment, embedded operating system and embedded application software.

Embedded processors include EMPU, EMCU, EDSP, and SoC.
Embedded microprocessor (EMPU): its core is the CPU in general-purpose computers, which is specially cut down for embedded applications.
Embedded Microcontroller (EMCU): Also known as single-chip microcomputer, integrates the entire computer system into a single chip. Generally, with a microprocessor kernel as the core, the chip is integrated with many necessary functions and peripherals. At present, the mainstream of the embedded system industry.
Embedded DSP processor (EDSP): the system structure and commands are specially designed, which makes it suitable for executing DSP algorithms. The compilation efficiency is high and the instruction execution speed is fast. Intelligent Algorithms generally involve a large amount of computing, especially vector operations and linear addressing of pointers. These are the strengths of DSP processors.
Embedded On-Chip Systems (SoC): System On Chip, a variety of general processor kernels will be used as the standard library of SOC design companies, just like many other embedded System peripherals, become a standard device in the design of a large-scale program ...... The user only needs to define the entire application system. After the simulation is passed, the design drawing can be handed over to the semiconductor factory for sample production.

Embedded peripheral devices: other components that provide storage, communication, debugging, display, and other functions

Embedded Operating System: it can be divided into time-based and real-time operating systems based on the ability to meet real-time requirements. Real-time systems can be divided into weak real-time, general real-time, and strong real-time according to the response time.

Embedded Application Software: computer software based on a fixed hardware platform for specific application fields to achieve user expectations.