《基于AT89C52单片机、串行EEPROM和字符型液晶显示模块的电子密码锁》-毕业学术论文（设计）.docVIP

PAGE i lw 电子密码锁的接口设计 摘要：本文介绍一种基于单片机、串行EEPROM和字符型液晶显示模块的电子密码锁。该系统采用AT89C52单片机和AT24C01串行EEPROM，从微键盘输入数字序列，通过AT89C52模拟I2C总线和AT24C01通讯，采用字符型液晶显示模块LCD来实现密码锁的显示功能。 本论文首先给出了电子密码锁的设计思路，简要介绍了其硬件电路的各部分结构及主要功能，接着分别介绍了系统的硬件结构及连接。在硬件电路设计中，论文简单描述了AT89C52的部分结构及主要功能，并详细介绍了I2C总线及存储器AT24C01芯片的工作原理；在软件设计中，论文介绍了硬件电路各组成部分的编程思路，并且给出了详尽的流程图。 关键词：电子密码锁；单片机；串行EEPROM；矩阵键盘；LCD；AT24C01 The interface design of cryptographic electronic lock Abstract： The paper presents a cryptographic electronic lock based on MCU,serial EEPROM and character type liquid crystal display module.This system applies AT89C52MCU and AT24C01 serial EEPROM.People can input number sequence from the matrix keyboard.And the AT89C52 and AT24C01 is adopted to realize the function of the cryptographic electronic lock.AT89C52 communicates with AT24C01 by I2C bus.Its display function is realized by the character type liquid crystal display module. At first,the paper describes the ideas of the design, the structure and function of the hardware is also included.Then in the part of the hardware it gives the connection of the hardware.In terms of the AT89C52,the paper gives a simple description , and also it illustrates the I2C bus and AT24C01 in detail. Finally,in the part of the software the program ideas of the the system is presented,following a flow chart. Key Words: cryptographic electronic lock; MCU; serial EEPROM;matrix keyboard; LCD;AT24C01 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc260315947 前言 PAGEREF _Toc260315947 \h 1 HYPERLINK \l _Toc260315948 第1章 电子密码锁接口设计方案 PAGEREF _Toc260315948 \h 2 HYPERLINK \l _Toc260315949 1 设计方案 PAGEREF _Toc260315949 \h 2 HYPERLINK \l _Toc260315950 第2章 电子密码锁硬件结构设计 PAGEREF _Toc260315950 \h 3 HYPERLINK \l _Toc260315951 2.1 硬件结构 PAGEREF _Toc260315951 \h 3 HYPERLINK \l _Toc260315952 2.1.1 AT89C52简介 PAGEREF _Toc260315952 \h 3 HYPERLINK \l _Toc260315955 2.1.2 AT24C01串行EEPROM及其通讯 PAGEREF _Toc260315955 \h 4 HYPERLINK \l _Toc260315956 2.1.3 晶体振荡器简介 PAGEREF _Toc260315956 \h 7 HYP