基于單片機的電子密碼鎖的設計

電子機電論文編號:JD920   論文字數:15160,頁數:47

 目   錄
摘   要……………………………………………………………………………………I
Abstract…………………………………………………………………………….II
第1章  緒  論................................................1
 1.1發(fā)展歷史..................................................1
 1.2發(fā)展前景..................................................2
 1.3設計的實現.................................................2
第2章  模塊電路設計............................................4
 2.1系統框圖.................................................4
 2.2控制電路設計..............................................4
 2.2.1單片機AT89C52的總體介紹................................. 5
 2.2.2單片機AT89C52的引腳功能說明...........................6
 2.2.3控制電路...............................................9
 2.3   鍵盤電路設計..........................................10
 2.3.1鍵盤輸入原理..........................................10
 2.3.2鍵盤掃描中遇見的問題.................................12
 2.3.3鍵盤的鍵值編碼…………………………………………………13
 2.3.4鍵盤面板邏輯圖…………………………………………………14
 2.4顯示電路設計………………………………………………………………… 15
 2.4.1數碼管顯示………………………………………………………15
 2.4.2數碼管顯示原理圖……………………………………………17
 2.5電源模塊……………………………………………………………………… 19
 2.6密碼鎖和指示燈設計…………………………………………………………. 19
第3章   總電路設計………………………………………………………………21
第4章   軟件設計………………………………………………………………22
 4.1 軟件流程…………………………………………………………………22
 4.2  程序的編譯和調試………………………………………………………30
     4.2.1 對程序進行編譯……………………………………………………30
     4.2.2 對程序進行調試……………………………………………………31
總結……………………………………………………………………………………32
參考文獻………………………………………………………………………33
致謝……………………………………………………………………………………34
附錄1………………………………………………………………………………35
附錄2………………………………………………………………………………43

摘  要
 本設計選用單片機芯片AT89C52為主控芯片，作鍵盤處理和數碼管顯示，以及控制指示燈和開鎖。采用4×4鍵盤，其中設定10個數字鍵（0—9）和兩個功能鍵（確認和取消），只有當確認功能鍵先按下的情況下才能執(zhí)行相應的功能部分；若沒有按下，則單片機繼續(xù)進行鍵盤掃描。當輸入六個密碼并按下確認鍵后，單片機將輸入的密碼與設定的密碼進行比較，若密碼正確，則控制綠色發(fā)光二極管亮一秒鐘，同時單片機控制驅動電路開鎖；若密碼不正確，則控制紅色發(fā)光二極管亮一秒鐘，并且驅動開鎖電路不動作。.
關鍵詞：單片機；鍵盤； 密碼； 二極管
 
Abstract

    This design chooses to use a single slice the machine chip AT89 C52 to control chip for the lord, making keyboard processing and figuring to take care of a manifestation, and controling an indicator and opening a lock. It adopts 4×4 keyboards, sets 10 piece character key(0-9)s among them with two function keys(ENTER and CANCEL), only having to be under the circumstance that the ENTER function key presses first then can carry out homologous function part; If do not press, the single slice machine then continued to carry on a keyboard to scan. After inputing six passwords and pressing ENTER function key, then the single slice machine carries on the password of password and enactment for inputing to comparison, if the password is right, then controling the green give out light diode for bright second, at the same time ,the single slice machine control drives electric circuit to open a lock;If the password is incorrect, then controling red to give out light diode for bright second, driving to open lock electric circuit not to act. This completes burglarproof function.
Keywords ：  SCM ，keyboard ，password ，diode