Chapter II Android system and embedded development

Chapter II Android System and embedded development

Chapter two first to understand a ndroid and embedded lnux What is the difference and connection between the system , embedded Linux linux system ; a Ndroid android system. The difference between the is Android system and Linux system differences. android linux Android java virtual machines. android system ui > Lnux.

First we should understand what is embedded, for embedded, it is a " fully embedded in the controlled device, designed for specific applications of the dedicated computer system ", according to the British Institute of Electrical Engineers ( U.K. Institution of Electrical Engineer ), embedded systems for control, monitoring or ancillary equipment, machines or equipment for plant operation. Unlike general-purpose computer systems such as personal computers, embedded systems typically perform pre-defined tasks with specific requirements. Because the embedded system is only for a particular task, the designer can optimize it and reduce the cost by reducing the size. Embedded systems are often produced in large quantities, so a single cost savings can be achieved with hundreds of millions of magnification with production.

Second, we should know the composition of embedded system, an embedded system device is generally composed of embedded computer systems and actuators embedded computer system is the core of the whole embedded systems, composed of hardware layer, middle layer, system software layer and application software layer. The actuator is also known as the Controlled object, which can accept the control commands issued by the embedded computer system and perform the prescribed operation or task. The actuator can be very simple, such as a small type of motor on the phone, when the phone is in the vibration receiving state of open, can also be very complex, such as the Sony Intelligent Robot Dog, the above integrated with a plurality of micro-control motor and a variety of sensors, so that can perform a variety of complex motion and feel the state of information.

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Chapter II Android system and embedded development