基于AT89S52单片机的密码锁设计精选.doc

2010届《单片机技术》课程设计说明书 密码锁 系 、 部： 电气与信息工程系 学生姓名： 指导教师： 职称 副教授 专 业： 电子信息工程 班 级： 0801 完成时间： 2010.12.29 摘 要 随着科技的日益发展，针对传统机械锁安全性低，需随身携带且易丢失钥匙的缺点，另外随着经济技术的发展和人们对生活水平要求的提高，电子密码锁控制系统已经越来越符合人们的要求，本文设计了一种使用单片机实现的电子密码锁。 本文介绍了基于单片机和串行EEPROM的智能密码控制系统，对系统硬件和软件实现进行了详细的描述。该系统采用AT89S52单片机和AT24C02串行EEPROM，通过AT89S52模拟总线和 AT24C02通讯，实现密码控制的功能。 本文从经济实用的角度出发，采用美国Atmel公司的单片机AT89S52作为主控芯片与数据存储器单元，结合外围的矩阵式键盘输入、LCD液晶显示、报警等，用C语言编写主控芯片与EEPROM读写程序相结合，设计了一个可以多次修改密码，并且具有报警功能的电子密码锁控制系统。 本设计通过单片机将各模块有机地连接在一起,完美地实现了设计目的，该锁具有安全性高、性能好、易操作、功耗低、成本低、具有广泛实用性等优点，具有一定的推广性。 关键字 密码锁；AT89S52；AT24C02；液晶 ABSTRACT Along with the development of science and technology, in view of the traditional mechanical lock security low, need to carry and easy lost key shortcomings, in addition with economic technical development and people to the improvement of living standard requirements, electronic combination lock control system has been more and more accord with the requirement of people, this paper introduces a design using microcomputer electronic combination lock. This paper introduced based on SCM and serial an EEPROM intelligent password control system of the system hardware and software realization are described. This system USES AT89S52 SCM and AT24C02 serial an EPROM, through AT89S52 simulation bus and AT24C02 communication, realizing the password control function. This article from the economical practical Angle and Atmel company adopts the monolithic integrated circuit AT89S52 as the master chip and data storage locations, combines with the periphery matrix keyboard input, liquid crystal display, alarm, written in C control chip with an EEPROM literacy programs combining, design of a password, and can be changed several times with alarm function of electronic combination lock control system. This design by microcontroller will each module in organic are linked together, the perfect way to realize the design purpose, this lock has high s