基于51單片機的多功能數(shù)字時鐘設計-畢業(yè)論文設計

1、目錄摘要......................................................................................................................1ABSTRACT.........................................................................................

2、...................21概述...............................................................................................................31.1本課題研究目的及意義.................................................................31.2國內外

3、研究背景.............................................................................31.3本課題的研究方法及預期達到的目的.........................................42總體控制方案設計....................................................................

4、..................52.1數(shù)字時鐘的工作原理.....................................................................52.2單片機的選型.................................................................................52.3AT89C51單片機介紹.............

5、.......................................................72.4總體方案設計.................................................................................83硬件設計....................................................................

6、....................................93.1鍵盤模塊.........................................................................................93.2顯示模塊...............................................................................

7、..........93.3復位電路.......................................................................................123.4蜂鳴器驅動電路...........................................................................134軟件設計.....................

8、.................................................................................154.1總體軟件設計...............................................................................154.2中斷服務函數(shù)......................................

9、.........................................154.3計時子函數(shù)...................................................................................164.4鬧鐘子函數(shù)流程圖.......................................................................17

10、4.5鍵盤掃描子函數(shù)...........................................................................184.6時間和鬧鐘的設置......................................................................194.7軟件設計總結.........................................

11、.....................................205總結...............................................................................................................226參考文獻............................................................

12、..........................................237致謝................................................................................................................24附錄.........................................................

13、...........................................................242ABSTRACTInrecentyearselectronictechnologyhasgainedrapiddevelopmentmodernelectronicproductshasbeenusedinalmostallspheresofsocietyIt’sastrongimpetustothedevelop

14、mentofsocialproductivityimprovementinthelevelofsocialinfmation.Theperfmanceofmodernelectronicproductsalsohasbeenfurtherimproved.Thedigitalclocktimingisadigitalcircuitwhichdisplays“hour““minute““second“.Theaccuracystabili

15、tyofdigitalclockisfarmethantheoldfashionedmechanicalclock.Inthisdesignweuse8segmentLEDdigitaldisplaydisplayedaccdingtodigitaldynamicdisplayprinciplewitha12MHzcrystaloscillatpulsethetimercountanexternalspeakerisusedasther

16、ing.Inthisdesignthecircuithasthefunctiontodisplaytimethetimecanbeadjusted.Becausedigitalclockhastheadvantageoflowpriceshighprecisioneasytousemultifunctioneasyintegrationitislovedbythemajityofconsumptionsoithasbeenwidelyu