电子密码锁设计——毕业设计讲解.docVIP

*****大学 毕业设计（论文） 设计(论文)题目： 学 生：专 业： 班 级： 指导教师： 设计日期：年月日 ELECTRONIC COMBINATION LOCK DESIGN ABSTRACT As electronic products to intelligence and the continuous development of miniaturization, SCM has become the research and development of electronic product first controller. This paper introduces a kind of application of STC89C52 SCM design anti-theft alarm system, automatic electronic locks. Through the experiment validate the system hardware and software design is simple and easy to develop, low cost, convenient operation, safe and reliable, etc. Can be used as product development and application in residential, office of safe and security needs of the cabinet etc, so electronic locks with stronger practicability, lock the key, and make simple, Both safe and reliable, and low cost, Both secrecy, and practicability, the huge market in locks. This system by the STC89C52 single-chip microcomputer, the 4 * 4 matrix keyboard, buzzer, reset circuit and vibration circuit, relay and so on, 4 * 4 keyboard is mainly used for input and modify the password, the buzzer alarm, and resonance circuit and reset circuit STC89C52 singlechip microcontroller minimum system. It has six Settings, modify user password, mistyped alarm, password error alarm, etc. This system is low cost, function and practical. KEY WORDS : Combination lock, Buzzer, Call the police, STC89C52 目 录 摘 要 I ABSTRACT II 第一章 绪 论 1 1.1 密码锁简介 1 1.2 课题背景 1 1.3 课题的目的和意义 2 1.4 电子密码锁发展趋势 2 1.5 本设计所要实现的目标 3 1.6 本设计完成的工作 4 1.7 设计方案简介 4 第二章 总体方案 5 2.1 硬件选择 6 2.1.1 电源模块 6 2.1.2 主控制器模块 6 2.1.3 存储器模块 6 2.2 软件部分 7 第三章 硬件系统构成及实现 8 3.1 主要元器件 8 3.1.1 主控芯片STC89C52 8 3.1.2 存储芯片AT24C02 12 3.1.3 LCD1602显示器 13 3.1.4 晶体振荡器 15 3.2 硬件电路 16 3.2.1 电源输入电路 16 3.2.2 键盘电路 17 3.2.3 存储芯片电路 17 3.2.4 液晶显示电路 18 3.2.5 报警电路 19 3.2.6 复位电路 20 3.2.7 晶振电路 20 3.2.8 开锁电路 21 第四章 软件系统设计方案 21 4.1 主程序流程图 22 4.2 按键功能流程图 23 4.3 密码设置流程图 24 4.4 开锁软件