基于单片机的音乐盒

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1、目录摘要···································································ⅡAbstract······························································Ⅱ1绪论························································11.1历史背景··················································11.2目的意义············

2、······································11.3主要问题··················································11.4技术要求··················································12设计方案简述···············································22.1设计功能要求··············································22.2总体设计原理·····

3、·········································22.3总体设计框图··············································23详细设计····················································33.1芯片的选择与介绍··········································33.1.1主要性能参数············································33.1.2引脚功能说明···

4、·········································33.2最小单片机系统············································53.3键盘部分··················································63.4扬声器部分················································63.5显示部分··················································63.6硬件部分···

5、···············································63.7流程图····················································74设计结果与分析··············································85总结························································9参考文献·····················································1

6、0附录一元器件清单············································11附录二电路图················································12附录三程序代码··············································13摘要为了实现单片机控制音乐播放，此次课程设计做出了尝试，即电子音乐盒的设计。本设计采用了扬声器发声来实现歌曲的播放，能保持基本音调不变，流畅播放出歌曲。现选用STC89C52单片机。用KeilC51编程软件编程，用PROTEUS

7、单片机仿真软件仿真。利用I/O口产生一定频率的方波，驱动蜂鸣器，发出不同的音调，从而演奏乐曲。通过单片机P1口控制，实现功能键盘控制；功能键盘采用按键开关，通过单片机P2口控制，实现歌曲播放顺序的调换和暂停播放功能；扬声器由单片机的P3口控制，实现歌曲播放；主要工作过程是通过按下功能键实现上一首和下一首及暂停播放，同时有液晶屏显示当前播放歌曲的序号，扬声器播放出音乐。关键词：STC89C52单片机;方波;音调AbstractInordertoachievesingle-chipmicrocomputertocontrolmusicplayer,Imade

8、theprojecttotry,thatis,thedesignofelectr