毕业设计（论文）基于AT89C51单片机的电子密码锁的设计.docVIP

目 录 摘要 I Abstract. II 第一章 绪论 1 1.1 课题的背景及意义 1 1.2 电子密码锁国内外发展趋势 1 1.3 研究内容 1 第二章 主要元器件介绍 2 2.1 主控芯AT89C51 2 2.2 存储芯片AT24C04 3 2.3 LCD1602显示器 3 2.4 晶体振荡器 5 第三章 电子密码锁系统硬件设计 6 3.1 设计原理 6 3.2 系统设计框图 6 3. 6 3.3.1 4*4键盘电路的设计 6 3..2 复位电路的设计说明 7 3..3 晶振电路的设计说明 7 3..4 LCD1602显示电路 8 3..5 LED灯和蜂鸣器的设计说明 8 3..6 AT24C04掉电存储单元的设计说明 9 第四章 电子密码锁软件设计 10 4.1 主程序总流程 10 4.2 子程序流程 10 4.2.1 开锁流程 10 4.2.2 修改密码流程 11 第五章 调试与实现 12 5.1 硬件调试 12 5.2 软件调试 12 5.3 Proteus仿真 13 总 结 15 参考文献（References） 16 致 谢 17 附录 18  基于AT89C51单片机的电子密码锁的设计 摘要：当今社会，防盗是每个家庭都非常重视的问题。由于传统的机械锁其结构单一，无法满足人们对安全的需求。电子产品不断的优化和人性化，促使数字密码锁的防盗功用显得尤为重要。单片机因为实用，功能强大，价格低廉，已经成为电子产品中核心系统的首选。系统C语言编写。具备报警具有一定的实用价值。 关键词：单片机，AT89C51，LCD1602，AT24C04，密码锁  The design of the electronic combination lock based on AT89C51 Abstract: In todays society, every family security is a very important concern . Due to the traditional mechanical locks its single structure, can not meet the demand for security. Electronics continuous optimization and humane , prompting a digital lock anti-theft function is particularly important. SCM because practical, powerful , inexpensive, electronic products have become the first choice for the core system. This article recounts an MCU AT89C51 as the core control system , instead of using LCD1602 LCD monitor as a digital display, with 16 keys keyboard as an input device consisting determinant , AT24C04 data memory to save your password information , the composition of the alarm buzzer electronic code lock circuit design and production. This electronic locks not only making low cost, but powerful. SCM system application choice is high-level language C language to write . C language is not only simple and easy to understand and cooked through . This electronic locks design is very user-friendly, easy to operate , but also with the police and repeatedly enter the wrong password lock function , it meets the needs of the community now has some practical value. Keywords: SCM, AT89C51, LCD1602, AT24C04, locks 第一章