Embedded system is undoubtedly one of the hottest and most promising IT application fields. Embedded system is used in some special equipment. Usually, the hardware resources of these devices (such as processor, memory, etc.). ) are very limited, and are sensitive to cost, sometimes demanding real-time response.
Especially with the intelligentization of consumer appliances, embedded is more important. We usually see mobile phones, PDAs, electronic dictionaries, videophones, VCD/DVD/MP3 players, digital cameras (DC), digital video cameras (DV), USB flash drives, set-top boxes, high-definition televisions (HDTV), game machines, smart toys, switches, routers, numerical control equipment or instruments, automotive electronics, home appliance control systems, and medical instruments.
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Requirements for embedded development:
Function, reliability and power consumption are the most noteworthy places for software developers. Take the mobile phone as an example. When the hardware platform is selected, the performance of the processor is limited. It is entirely up to the software to make the operation of the mobile phone more user-friendly, the menu response faster and the functions more and better.
Drivers and applications need to cooperate to maximize the performance of hardware. For example, the screen of a mobile phone always takes a long time to go out, which makes its battery run out quickly. As long as the software is improved, the battery life may be doubled.
An excellent embedded system has squeezed the hardware performance and carefully adjusted the software, which has reached the point of Excellence and profitability. Sometimes we even think hard to save a few seconds of startup time: adjust the startup order of the program to make the time-consuming program run later, change the storage mode of the program to make it load faster, and even make the user feel that the time is not that long by displaying a progress bar.
Baidu Encyclopedia-Embedded Development