In general, computer systems embedded in certain specialized devices can become embedded systems. Typical small IPCs, MCUs, arm linux, our most common, may be our almost mobile phone. There are many classification methods for embedded systems, different classification methods, and different classification results.
According to the complexity of the system structure can be divided into:
1) Single-chip system
The entire system has only one main chip, typically 51, arm, msp430, pic series, etc., including on-chip memory and peripherals. It usually becomes a SOC (system on chip) chip, integrates a calculation unit, a dynamic memory unit, a data storage unit, and even a peripheral reset and voltage conversion device are integrated together. This kind of chip is easy to use, it is very easy to get started, and its cost is very low. It is especially suitable for beginners.
From the hardware point of view, generally using a single chip, plus some resistors and capacitors, the system will be able to work normally. For beginners just learning hardware, the risk of debugging is very small, and the cost of doing the circuit board itself is also very high. Low, only 100-200 yuan, will be able to practice their own hands, you can achieve the purpose of rapid entry, learning this cpu, you can buy development board, but I still recommend that you spend 100,200 yuan to make a version of their own pcb, even if it is full Board fly line, can also exercise their own hands and brains.
As a hardware designer, perhaps in the future do not need their own electric iron, the social division of labor is different, generally larger companies will not allow engineers to solder their own pcb, welding quality problems first, and second, cost considerations. A welder's working hours are much smaller than an electronic design engineer.
However, for hardware engineers who want to work on hardware, soldering should also be learned as a craft. Although not necessarily doing it by yourself. Only when you design your own product can you think about welding more thoroughly and the product's producibility is also a very important factor.
Many of these chips are small companies that are more suitable for starting a business. The threshold for entry is low. If you have a good idea and you don’t have much money, you can give it a try. However, for career planning, unless it is related to the industry, in general, the salary received is low. If you play in the spare time, or if you are lucky, find a good company. Generally speaking, don't be your lifelong career. However, if you have good ideas, your own business success is also a road to success.
However, for entrepreneurship, we must plan for 99% failure. This is another topic and we will not talk about it.
Nowadays, the work is difficult to find, and some people who are not responsible for the right to speak have the right to speak. If you are a college student, you must be cautious and careful. Of course, if those flickers can give you money, yes, no, then, then try it.
2) Multi-chip system Multi-chip system Multi-core
A single-chip system is simple and easy, but this determines its limited functionality. For many complex applications, it can only be solved with a multi-chip solution.
In general, these solutions can not meet the requirements of streaking, and generally use operating system solutions.
Typical multi-chip systems include: industrial computers, tax control machines, industrial terminals, digital TV set-top boxes, network downloaders, routers, and most smart phones.
In general, a multi-chip system can usually be a team, individuals generally have difficulty in this ability and energy. If a single individual can handle it, it will take a lot of time. Generally speaking, if you work in this area, you will get a very high salary if you are proficient in a certain aspect. If you want to transfer technology as a springboard to management, you need to pay more attention to management and use more management software while doing a good job of technical work. For those who want to create a company by themselves or with a few friends in the future, they need to pay more attention to related technologies.
In addition, technology is only one aspect of entrepreneurship. What's more needed is the cooperation of a team.
Of course, this division is not absolute. Some manufacturers integrate a high-performance arm, large-capacity flash, and other peripherals into a single film. This can be considered as a single-chip system, but the price is very expensive. It is only suitable for Do not consider the cost of the occasion.
Technology is developing, and perhaps everyone in the future, everyone's mobile phone is a high-performance, high-bandwidth pc computer.