文档介绍：目录
【摘要】 3
第一章前言 5
课题的背景及意义 5
国内外发展现状 5
本文的主要研究内容 5
开发环境介绍 6
第二章系统的组成及工作原理 8
需求分析 8
设计内容与要求 8
系统框图 8
9
9
第三章硬件电路设计 10
10
时钟电路 12
复位电路 13
LCD显示模块 14
15
“16×2”字符型液晶显示模块 15
“4×4”矩阵式键盘扫描 17
***电路 19
电路总图 20
第四章软件设计 21
软件设计分析 21
系统资源分配 21
程序设计 22
程序清单及注释 23
第五章实验调试及测试结果 30
硬件调试 30
软件调试 31
总体调试 31
第六章制作电路板 32
Protel 99SE简介 32
绘制电路原理图 32
制作PCB板 33
第七章总结 35
实现功能 35
心得体会 35
致谢 36
参考文献 37
附录一:元器件清单 38
LCD电子密码锁
【摘要】当今安全信息系统应用越来越广泛,特别在保护机密、维护隐私和财产保护方面起到重大作用,而基于电子密码锁的安全系统是其中的组成部分,因此研究它具有重大的现实意义。本次设计以电磁继电器模拟密码锁,由单片机89C51来控制锁的打开与闭合,密码从键盘输入,用89C51来控制LCD显示当前锁的状态信息。本次设计的核心是软件部分,通过编程来控制输出高低电平,再加上硬件电路来实现***的功能,密码为6位,且设计的电子密码系统稳定性能好,安全系数高, 其方法和技术可广泛用于仓管、防盗门、密码箱等安全系统。
【关键词】单片机开发系统密码锁 LCD
LCD Electronic Password lock
Abstract: Now the security information system application es more and more widespread, specially plays the significant role in protecting the secret, vindicating the privacy and the property protection. And the safety system based on the electronic password lock is a part of them. Therefore investigating it is of great practical significance. This design uses the ic Relay to simulate password lock, the 89C51 to control the opening and closure of the lock, the keyboard to enter the password and the89C51 to control LCD which is used to display the current state of the lock. This design takes software as its core, controls the output height level via program, and in addition realizes the function of opening the lock via hardware electric circuit. The password should be confined to 6 figures, also the stability of the designed electron cryptography is good, the safety coefficient is high, its methods and the technology can be widely used in the storehouse of management, security gate, combination-locked briefcase and etc.
Key words: MCS development system, passwords lock, LCD