基于单片机的电子密码锁设计.pdf

11 基于单片机的电子密码锁设计 摘要： 当今社会电子技术的发展越来越快，各种各样的智能产品开始在生活中出现，给人们的生 带来了便利。密码锁是我们生活普遍使用的设备，在很多的场合都会用到电子密码锁，例如保险箱、门 禁系统的原理都是电子密码锁的原理。因此了解电子密码所的设计原理对我们开发相关的产品具有重要 的帮助意义。 课题根据任务书的要求用STC89C52 单片机设计了一款电子密码锁。系统中包括了硬件电路设计 和软件设计。硬件包括单片机最小系统电路、4X4 按键输入电路、液晶LCD1602 显示电路、报警电路 和AT24C02 存储电路。软件采用C 语言在keil 中编写了电子密码锁的程序。实现了输入密码开锁的功 能。最后为了验证电子密码锁的功能，设计了实物电路板，进行了功能演示。 经过一系列的调试和测试，验证了本次设计的密码锁的功能，实现了预期的设计目标， 密码锁工作稳定、成本低、使用方便，具有很好的应用前景。 关键词：电子密码锁；单片机；LCD1602 液晶 Abstract:Nowadays, with the rapid development of electronic technology, a variety of intelligent products begin to appear in life, which brings convenience to peoples life. Password lock is a common device in our life. In many occasions, electronic password lock is used. For 21 example, the principle of safe and access control system is the principle of electronic password lock. Therefore, it is of great help for us to understand the design principle of the electronic cryptography Institute. Subject according to the requirement of the specification with STC89C52 microcontroller designed a electronic combination lock. System includes hardware circuit design and software design. Hardware includes the single chip microcomputer minimum system circuit, 4 x4 key input circuit, liquid crystal LCD1602 display circuit, alarm circuit and AT24C02 storage circuit. In keil software using C language to write the program of electronic combination lock. We can realize the function of the input password lock. Finally, in order to verify the function of electronic combination lock, the physical circuit board design, the function of demonstration. It is proved by a series of debugging and testing, the design