毕业设计（论文）-基于单片机的多用途定时器装置.doc

摘 要 如今的科技已是飞跃的进步，然而定时器的应用永远不会退休。“定时器”总的来说有两种类型，一种以机械时钟形式的产品，这种定时器功能简单，应用于成本比较低的产品中，如比较古老的滴水计时器、传统的电风扇。当然滴水计时已被淘汰，而低价的风扇中还是不会淘汰这种机械运转的精度不高的定时器。另一种是基于电子电路数字技术的新一代产品，这种产品功能强，精度高，控制和使用都比较直观而灵活，是前者的替代之物。 本设计开发了一种基于单片机的专用定时器。它造价低，功能全，整体性价比高，可适应很多的场合做为保护或定时预警系统中。 此设计是最典型且经典的单片机定时功能应用设计，设计中使用了单片机定时器的设计、单片机中断使用方法、LED显示技术等。可以实现在100小时内的任意时间定时，另可外控负载和提示报警等。 设计中的硬件电路主要含盖了STC89C51RC单片机、有源蜂鸣器、LED数字显示数码管等。在硬件的设计基础上，通过软件进行数码管的数值显示、键扫描程序、蜂鸣器的提示音效和报警音效的处理。 关键词：定时器、STC89C51单片机、LED数字显示数码管  ABSTRACT Today, technology is a leap of progress, however, the application of the timer never retired. Timer In general there are two types, a mechanical clock in the form of products, such a simple timer function, used in low-cost products, such as the old drip timer, traditional fans . Of course, dripping timing has been eliminated, and cheap fan or accuracy of this mechanical operation of the timer will not be eliminated. Another is based on a new generation of electronic circuits digital technology products, this product features high precision, control and use more intuitive and flexible, the former alternative material. The design and development of a microcontroller-based dedicated timer. It is low cost, full-function, and overall cost-effective, and can be adapted to many occasions as a protection or in the timing early warning system. This design is the most typical and classic the microcontroller timing function application design, the design used in the design of a microcontroller timer, microcontroller interrupt usage, LED display technologies. The arbitrary timing can be achieved in 100 hours, another may be outside the control load and prompted alarm. The hardware circuit design covers Microcontroller STC89C51RC active buzzer, LED digital display digital tube. Hardware design based on the value of the digital tube display, key scanner prompt sound and alarm buzzer sound processing through software. Keywords: timer, STC89C51 microcontroller, LED digital display digital tube 目 录 前 言