基于单片机AT89C51设计了自动窗帘控制系统，结合了8255、CD、DS12887芯片以及步进电机进行设计与开发，实了窗帘的定时及手动升降功能。本设计要求能够显示时间，定时及手动进行窗帘升降控制并显示窗帘状态，并且可以对系统时间、上升及下降时间进行设定的功能。

本系统采用AT89C51作为控制芯片，窗帘控制采用步进电机，DS12887作为系统的时钟，8255外扩I/O接口外接键盘，LCD显示时间及窗帘状态。-AT89C51 microcontroller-based design of the automatic curtain control system, combined with the 8255, CD, DS12887 chip and the stepper motor design and development, implementation timing and manual curtain down function. This design requires the ability to display the time, timing, and manual control and display curtain curtain down state, and can the system time, rise and fall time setting function. The system uses a control chip AT89C51, curtain control a stepping motor, DS12887 as the system clock, 8255 outside the expansion I/O interface to an external keyboard, LCD display time and the curtains state.