An embedded system is a dedicated computer system that is part of a device or device. Typically, the embedded system is a control program stored in the ROM in the embedded processor control board. In fact, all devices with digital interfaces, such as watches, microwave ovens, video recorders, cars, etc., are using embedded systems, some embedded systems also include operating systems, but most embedded systems are implemented by a single program logic.
From the application object to be defined, the embedded system is a combination of software and hardware, but also can cover mechanical and other ancillary devices. China's widely recognized embedded system is defined as: application-centric, based on computer technology, hardware and software can be tailored to adapt to the application system on the function, reliability, cost, size, power and other strict requirements of the special computer system.
An embedded system device is usually composed of embedded computer system and execution device. The embedded computer system is the core of the whole embedded system. It is composed of hardware layer, middle layer, system software layer and application software layer. An execution device, also known as a controlled object, can accept control commands issued by an embedded computer system to perform the specified operations or tasks. The implementation of the device can be very simple, such as a small motor on the phone, when the phone is in the shock receiving state to open; can also be very complex, such as SONY smart machine dog, the above integrated a number of micro-control motor and a variety of sensors, Which can perform a variety of complex actions and feel a variety of state information.
An embedded system device is usually composed of embedded computer system and execution device. The embedded computer system is the core of the whole embedded system. It is composed of hardware layer, middle layer, system software layer and application software layer. An execution device, also known as a controlled object, can accept control commands issued by an embedded computer system to perform the specified operations or tasks. The implementation of the device can be very simple, such as a small motor on the phone, when the phone is in the shock receiving state to open; can also be very complex, such as SONY smart machine dog, the above integrated a number of micro-control motor and a variety of sensors, Which can perform a variety of complex actions and feel a variety of state information.