基于单片机的智能广播系统设计--毕业设计.doc

PAGE PAGE II毕业设计课 题 名 称 基于单片机的智能广播系统设计 此设计还有源程序和以下材料，有需要的朋友下载了文档后留下你的邮箱，方便我传给你。摘要本文介绍了以AT89C52单片机为核心，结合键盘、显示、实时时钟等外围电路构成具有定时开/关功能的校园广播控制系统。主控制器的作用是数据的存取和处理，及时响应外部中断：按键中断，即T0计数器溢出中断；实时时钟更新结束中断。系统带有液晶显示器，配合按键提供友好的用户界面，操作简单，具有实时控制的功能。选取实时时钟芯片DS1302与控制器来实现自动播放和上下课打铃功能，从而实现无人值守。该时钟芯片能够长期、连续、可靠、稳定的工作；同时还具有体积小、功耗低等特点，使用方便。系统设计包括单片机及其外围硬件部分和计算机软件编程部分。硬件部分主要为软件的实现提供一个运行的基础，计算机软件编程主要实现键盘调节、液晶显示、智能控制等各模块的功能，采用C语言编程。关键词：单片机；液晶显示；智能控制；时钟ABSTRACTA broadcast system with automatic on / off function is designed, which is composed of the main controller and peripheral circuits. A single-chip microcomputer AT89C52 is used as the main controller and the circuits consists of buttons, display and real-time clock. The role of main controller is to access and to process the data. The main controller also responds timely to outside interrupts: the interruption from keyboard which is T0 counter overflow interruption; the interruption when updated real-time clock terminates. The system takes Liquid Crystal Display, provides amity of customer interface, which operates simply and has real-time control function. To obtain the unattended function, a real-time clock chip of DS1302 and controller are used in the automatic play and on/off class with bell alarming. And the DS1302 can operate consecutively, credibly and stably. It still has features such as small volume, low power consumption, the usage convenience and so on. The system includes a MCU with its periphery hardware circuit unit and a computer soft programming unit. The hardware circuit unit only provides the run basement for the software; the computer software programming unit mainly realizes keyboard regulation, Liquid Crystal Display, Intelligent Control functions, adopting the C language.Keywords: Microcomputer; LCD; Intelligent Control; Clock Chip目 录 TOC \o 1-2 \h \z \u HYPERLINK \l _Toc230533712 摘要 PAGEREF _Toc230533712 \h I HYPERLINK \l _Toc230533713 ABSTRACT PAGEREF _Toc230533713 \h II HYPERLINK \l _Toc230533714 第1