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大连水产学院本科毕业论文（设计）摘要I摘要随着科技的日益发展，电子密码控制系统已越来越符合人们的要求。本文介绍了基于单片机和串行EEPROM的智能密码控制系统,对系统硬件设计和软件实现进行了详细的描述。该系统采用AT89S51单片机和AT24C01串行EEPROM,通过AT89S51模拟I2C总线和AT24C01通讯,实现密码控制的功能。本文从经济实用的角度出发，采用美国Atmel公司的单片机AT89S51作为主控芯片与数据存储器单元，结合外围的矩阵键盘输入、LED显示、报警、开锁等，用C语言编写主控芯片的控制程序与EEPROM读写程序相结合，设计了一款可以多次更改密码，具有报警功能的电子密码控制系统。这种电路设计具有防试探按键输入、智能控制上锁、开锁、报警、修改密码等多种功能。密码长度可变、保密性强、灵活性高。经实验证明，该密码控制系统具有设计方法合理，简单易行，成本低，安全使用等特点，符合车辆、办公室用锁要求，具有推广价值。关键词：密码控制；单片机；EEPROM读写程序；报警大连水产学院本科毕业论文（设计）摘要IIAbstractAsthedevelopmentofscienceandtechnologydaybyday,thekeycontrolsystemismoreinlinewiththerequirementsofpeople.ThepaperpresentsacryptographicsmartpasswordcontrolbasedonMCUandserialEEPROM,describeshardwarestructureandsoftwaredesignofthesystem.ItadoptsAT89S51andAT24C01,realizesthefunctionofcryptographicsmartpasswordcontrol.AT89S51communicateswithAT24C01byI2Cbustoachievethepasswordcontrolfunction.Thisarticlefromtheeconomicalandpracticalpointofview,theuseoftheUnitedStatesAtmelCorporationAT89S51microcontrollerasamasterchipandthedatamemoryunit,combinedwiththeexternalmatrixkeyboardinput,LEDdigitaldisplay,alarm,unlockandsoon,dominatedbytheCprogramminglanguagechipEEPROMofthecontrolproceduresandthecombinationofreadingandwritingprogramdesignedtochangeapasswordmanytimes,thepolicefunctionwiththeelectronicthepasswordcontrol.Thiscircuitdesignwithanti-testbuttoninput,intelligentcontrollock,unlock,alarm,multiplefunctions,suchasChangePassword.Passwordlengthcanbechanged,evenmoresecretandflexiblethanothers.Experimentsshowthatthepasswordcontrolsystemischaracterizedbyitsreasonabledesigningmethods,simpleoperation,lowcostandpropertyofsafetyandpracticality．Besides，thepasswordcontrolcanbeusedintheofficeandhasgreatpotentialforcommercialdevelopment．KeyWords：Passwordcontrol;Single-chip;EEPROMreadandwriteprocedures;Alarm大连水产学院本科毕业论文（设计）目录III目录摘要..................................................................................................................................................IAbstract............................................................................................................................................II目录................................................................................................................................................III第一章引言.............................................................................................................................-1-1.1选题背景.................................................................................................................-1-1.2电子密码控制简介.................................................................................................-1-1.3电子密码控制的发展趋势.....................................................................................-1-1.4本设计所要实现的目标.........................................................................................-2-第二章电话报警电路的设计.................................................................................................-3-2.1电话报警电路总图...................................................................................................-3-2.2模拟摘机电路设计...................................................................................................-4-2.3DTMF信号输出放大电路的设计...............................................................................-5-2.4MT8880的介绍..........................................................................................................-5-第三章语音录放电路的设计.................................................................................................-7-3.1ISD1760功能概述....................................................................................................-7-3.2ISD1760使用要点....................................................................................................-8-3.3ISD1760的外围电路设计.........................................................................................-8-第四章音频放大和声控报警电路的设计..............................................................................-9-4.1音频放大电路的设计...............................................................................................-9-4.2声控报警电路...........................................................................................................-9-4.3掉电保护电路的设计................................................................................................-10-第五章程序设计...................................................................................................................-12-5.1按键功能设计.........................................................................................................-12-5.2功能开锁模块的程序设计...................................................................................-12-第六章键盘输入和显示电路的设计...................................................................................-16-6.1键盘输入部分的设计.............................................................................................-16-6.2显示部分的设计.....................................................................................................-17-第七章结束语............................................