【正文】 目 錄 摘要 : ............................................................................................................................................ I Abstract: ..................................................................................................................................... II 第 1 章 緒論 .............................................................................................................................. 1 課題背景 ......................................................................................................................... 1 課題設(shè)計(jì)目標(biāo) ................................................................................................................. 2 第 2 章 系統(tǒng)方案論證 .............................................................................................................. 4 主控部分的選擇 ............................................................................................................. 4 密碼輸入方式的選擇 ..................................................................................................... 5 第 3 章 系統(tǒng)總體設(shè)計(jì)和主要芯片介紹 .................................................................................. 6 系統(tǒng)總體設(shè)計(jì) ................................................................................................................. 6 主要芯片介紹 ................................................................................................................. 6 AT89C51.................................................................................................................... 6 存儲(chǔ)芯片 AT24C02 ............................................................................................... 10 顯示電路（ LCD1602） ........................................................................................ 11 第 4 章 系統(tǒng)硬件構(gòu)成 ............................................................................................................ 13 系統(tǒng)整體電路圖 ........................................................................................................... 13 單片機(jī)最小系統(tǒng)原理圖 ............................................................................................... 13 復(fù)位電路 ....................................................................................................................... 14 時(shí)鐘電路 ....................................................................................................................... 15 鍵盤輸入部分 ............................................................................................................... 16 密碼存儲(chǔ)部分 ............................................................................................................... 17 顯示部分 ....................................................................................................................... 18 報(bào)警部分 ....................................................................................................................... 19 第 5 章 軟件的設(shè)計(jì)與實(shí)現(xiàn) .................................................................................................... 20 軟件系統(tǒng)的總體設(shè)計(jì) ................................................................................................... 20 主程序流程圖 ............................................................................................................... 20 鍵功能程序流程圖 ....................................................................................................... 22 第 6 章 結(jié)論 ............................................................................................................................ 23 附 錄 ........................................................................................................................................ 26 附件 1：英文原文及中文翻譯 ........................................................................................... 26 附件 2：任務(wù)書 ................................................................................................................... 40 附件 3：開(kāi)題報(bào)告 ............................................................................................................... 41 附件 4：原理圖 ................................................................................................................... 46 附件 5：實(shí)物圖 ................................................................................................................... 47 附件 6：程序 ....................................................................................................................... 48 附件 7：元件清單 ............................................................................................................... 66 I 基于單片機(jī)的智能密碼鎖的設(shè)計(jì) 摘要 : 隨著科學(xué)技術(shù)的不斷發(fā)展，人們?cè)?日常生活與工作中 對(duì)保險(xiǎn)器件的要求越來(lái)越高。同時(shí)，電子設(shè)備也正在向智能化與微型化不斷發(fā)展， 電子密碼控制系統(tǒng)已經(jīng)越來(lái)越符合人們的要求。而單片機(jī)已經(jīng)成為電子產(chǎn)品研制和開(kāi)發(fā)中首選的控制器。為了滿足人們對(duì)鎖的使用要求，增加其安全性，同時(shí)克服傳統(tǒng)鎖具帶來(lái)的不方便性，用數(shù)據(jù)密碼代替鑰匙的智能密碼鎖便應(yīng)運(yùn)而生。智能密碼鎖 具有安全 性高、操作簡(jiǎn)易、成本低、 功耗低等優(yōu)點(diǎn)。 本次設(shè)計(jì)由單片機(jī)系統(tǒng)、矩陣鍵盤、 LCD 顯示和報(bào)警系統(tǒng)組 成。系統(tǒng)能完成開(kāi)鎖、超次鎖定、報(bào)警、修改用戶密碼等基本的密碼鎖 功能。除上述基本的密碼鎖功能外，還具有掉電存儲(chǔ)、聲光提示等功能，依據(jù)實(shí)際的情況還可以添加遙控功能。所采用的編程語(yǔ)言是 C 語(yǔ)言。本系統(tǒng)電路穩(wěn)定性高、成本低廉、 功能實(shí)用 ， 符合辦公室、住宅等場(chǎng)所的用鎖要求，具有推廣價(jià)值。 關(guān)鍵詞： AT89C51； AT24C02； 電子密碼鎖 ； 矩陣鍵盤 II Design of Intelligent Password Lock Based on MCU Abstract: with the continuous development of science and technology, insurance devices have bee increasingly demanding in people’s daily life and work. Meanwhile, the electronic intelligence devices are also being miniaturized to the intelligent and evolving. Electronic code control system has been increasingly in line with people39。s requirements. The microcontroller has bee the preferred controller in the research and development of electronic product. In order to meet people39。s requirements for the use of locks to increase their security and overing the inconvenience of traditional locks, smart locks which use the data encryption instead of key e into being. Smart locks have many advantages such as high security, ease of oper