Current, use material of bodily form of PVC plastic window extensively domestic and internationally, the numerous advantage such as environment of wood of its good heat insolation, heat preservation, sealed, sound insulation, energy-saving, section, protection, make its become a building to use the mainstream data of the window with each passing day. The dimensions of current situation existence of manufacturing industry of window of our country model low, function differs big, grade, without high-grade, produce can superfluous, low-level wait for a series of problems, raising quality of window system product and technical content is the main way that model window industry develops. Automatic window serves as a kind of burgeoning technology, with electron, communication, smooth, IT technology mix, fashion the product of automatic open, new-style window system that shut, the nova that vitality provides most in making window system product. Automatic window controller uses smooth Electromechanical unifinication compositive technology, the technology such as control of market mechanism, electron, remote control, communication at an organic whole, can develop a variety of a variety of functions, structures and the system of energy-saving window body that open the seriation automata that closes kind.
---Relation of logic of automatic window control is complex, and this product still is in research and development and trial production phase, need often modifies a design. If use common and logistic circuit to will make circuit complications, go against functional accretion and the modification that concern logically. For sheet of AT89C2051 of this make choice of piece machine as circuit main logic unit realizes control requirement.

Design a requirement
---Automatic window system is shown 1 times like the graph.

---, movement closing a window realizes control by two pushbutton. Logistic relation is: 1. The circumstance with casement ceaseless midway, open → to open window journey switch to put through by window of → of pushbutton opening a window → window stops → to close → to close window journey switch to put through by window of → of pushbutton closing a window → window stops;2. The case that casement midway stays, open → to press window or window of → of pushbutton closing a window to stop → to press a window by window of → of pushbutton opening a window / window of → of pushbutton closing a window leaves / the window closes → to open a window / switch of journey closing a window puts through → window stops. Journey switch receives the pushbutton with corresponding general rule to cannot produce an action, two pushbutton press at the same time cannot produce an action. Additional to assure safety, in movement closing a window, join what place switch to preventing to detect, if closing the clip in the process of the window to person or animal, prevent clip switch to start, casement stops to move, delay time after 0.2 seconds, regressive 0.5 seconds.
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