【正文】 畢業(yè) 設(shè)計(jì) 基于 STC89C52 的電子密碼鎖設(shè)計(jì) 系 部 電子信息工程 系 專 業(yè) 名 稱 電子信息工程技術(shù) 班 級(jí) 姓 名 學(xué) 號(hào) 指 導(dǎo) 教 師 2020 年 01 月 05 日電子信息工程系 基于 STC89C52 的 電子密碼鎖 I 基于 STC89C52 的電子密碼鎖 設(shè)計(jì) 摘 要 該設(shè)計(jì)是基于 STC89C52 單片機(jī)的電子密碼鎖，以 STC89C52 單片機(jī)為硬件核心，結(jié)合 44 矩陣鍵盤電路， LCD 顯示電路，密碼存儲(chǔ)電路，開鎖電路和聲音報(bào)警電路等外圍電路。利用單片機(jī)靈活的編程方法和豐富的 I/O 端口，該系統(tǒng)能實(shí)現(xiàn)密碼的輸入，清除，密碼正確開鎖，密碼錯(cuò)誤報(bào)警，用戶修改密碼等功能 。本系統(tǒng)成本低廉，功能實(shí)用。 關(guān)鍵詞 ： 密碼鎖 ； 單片機(jī)；液晶顯示；聲音報(bào)警 電子信息工程系 基于 STC89C52 的 電子密碼鎖 II Password motorcycle alarm Abstract This paper introduces a design of electronic passward lock which is backed on the SCM of STC89C52. This design uses the SCM of STC89C52 as hardware core , bining with other peripheral circuits such as 44 matrix keyboard interface circuit, passward storage circuit, LCD display circuit, unlock circuit and voice alarm circuit. Using the flexible programming and the rich I/O port of the SCM, the system can acplish the following functions:input ,clear or pare the password, unclock when the password is correct, alarm when the wrong enter password times is over and the user can change the password. The system costeffective, functional and practical. Keywords: SingleChip Microputer。 electronic password lock。 voice alarm。 LCD display 電子信息工程系 基于 STC89C52 的 電子密碼鎖 III 目 錄 1 引 言 .................................................................................................................................... 1 2 總體方案設(shè)計(jì) ........................................................................................................................ 2 方案論證 .......................................................................................................................... 2 方案選擇 .......................................................................................................................... 3 3 硬件設(shè)計(jì) ................................................................................................................................ 4 單片機(jī)部分 ...................................................................................................................... 4 44 行列式鍵盤部分 ...................................................................................................... 4 開鎖電路 .......................................................................................................................... 5 AT24C02 密碼儲(chǔ)存電路 ................................................................................................. 5 聲音報(bào)警電路 .................................................................................................................. 6 顯示模塊部分 .................................................................................................................. 6 顯示模塊選擇 ............................................................................................................ 6 液晶引腳功能說(shuō)明 .................................................................................................... 7 總體設(shè)計(jì) .......................................................................................................................... 9 4 軟件設(shè)計(jì) .............................................................................................................................. 11 軟件總框圖設(shè)計(jì) ............................................................................................................ 11 蜂鳴器聲音提示部分 .................................................................................................... 12 液晶顯示部分 ................................................................................................................ 12 鍵盤輸入部分 ................................................................................................................ 12 程序設(shè)計(jì)內(nèi)容 ......................................................................................................... 12 按鍵程序框圖 ......................................................................................................... 12 5 電路板設(shè)計(jì) .......................................................................................................................... 14 原理圖的繪制 ................................................................................................................ 14 電路板的生成制 作 ........................................................................................................ 14 電路原理圖的設(shè)計(jì) .................................................................................................. 14 產(chǎn)生網(wǎng)絡(luò)表 .............................................................................................................. 15 印制電路板的設(shè)計(jì) .................................................................................................. 15 安裝 .......................................................................................................................... 15 6 安裝與調(diào)試 .......................................................................................................................... 16 系統(tǒng)軟件調(diào)試 ................................................................................................................ 16 元器件的檢測(cè) ................................................................................................................ 16 系統(tǒng)硬件的安裝與調(diào)試 ................................................................................................ 16 設(shè)計(jì)結(jié)論 .................................................................................................................................. 18 總結(jié)與體會(huì) ..........................................