基于单片机的电子密码锁设计3.doc

摘要 - 2 - 第一章 绪论 - 4 - 第二章 硬件电路设计 - 5 - 2.1 单片机概述 - 5 - 2.2 AT89C51单片机介绍 - 7 - 2.3 行列式键盘 - 10 - 2.4 振荡电路 - 12 - 2.5 复位电路 - 14 - 2.6 分压电阻 - 14 - 2.7 晶体三极管 - 14 - 2.8 LED发光二级管原理及常识 - 15 - 2.9 蜂鸣器 - 16 - 第三章 软件程序设计 - 16 - 3.1 软件设计说明 - 16 - 3.2软件程序流程图（见附录五） - 17 - 3.3 软件程序 - 17 - 第四章 功能及使用方法 - 22 - 第五章 焊接及调试 - 23 - 5.1 焊接 - 23 - 5.2 调试 - 24 - 结束语 - 25 - 致谢 - 26 - 单片机电子密码锁 摘要 在日常的生活和工作中, 住宅与部门的安全防范、单位的文件档案、财务报表以及一些个人资料的保存多以加锁的办法来解决。传统的机械式钥匙开锁，常需携带多把钥匙, 使用极不方便, 且钥匙丢失后安全性即大打折扣。随着科学技术的不断发展，具有防盗报警功能的电子密码锁逐渐代替传统的机械式密码锁，克服了机械式密码锁密码量少、安全性能差的缺点，使密码锁无论在技术上还是在性能上都大大提高一步；特别是单片机的问世，出现了带微处理器的智能密码锁，它除具有电子密码锁的功能外，还引入了智能化管理、专家分析系统等功能，从而使密码锁具有很高的安全性、可靠性，应用日益广泛。 鉴于目前的技术水平与市场的接收程度，本文选用ATMEL公司的AT89C51单片机作为控制芯片，并在完成人工布线的基础上，利用仿真软件编写单片机的汇编语言程序，联合软、硬件调试电路板，完成了电子密码锁系统的设计。 关键词：4×4矩阵键盘；单片机AT89C51；LED发光二极管；蜂鸣器； Single-chip electronic code lock ABSTRACT In the daily life and work, security of residential and departments, the document files of units, financial statements, as well as some personal information is solving even more by locking. The traditional mechanical key to open more often need to carry keys, and is very inconvenient, and once the key is lost, its security will greatly reduce. With the continuous development of science and technology, electronic code lock of anti-theft alarm function will gradually replace the traditional mechanical locks, it overcome the mechanical lock’s Shortcomings of password less and poor safety performance, so that technical and performance of locks have greatly improved; in particular, the advent of single-chip, a microprocessor intelligent locks, which not only own the functions of electronic locks, but also introduce intelligent management and expert analysis system, which cause the password lock with high security, reliability, application of the increasingly widespread. Given the current level of technology and the market to receive the degree, we choose ATMEL Corporation AT89C51 single-chip microcomputer as the control chip, on the basis of