基于单片机的音乐门铃课程设计与仿真

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1、单片机课程设计题目：音乐门铃目录1.功能2.设计步骤1.前期工作·······························································12.电路结构·······························································13.基本步骤·······························································14.预期结果································

2、·······························23.硬件电路设计1.模拟仿真电路···························································22.元件列表······························································23.发声原理······························································34．软件设计1.设计材料················

3、·············································32.实验源程序···························································45.实验结果1.仿真结果·····························································82.实验感受······························································8音乐门铃的设计摘要：该设计以AT89

4、C51为芯片组成的一个音乐门铃解决方案，在设计系统硬件电路的基础上，实现了电子门铃系统软件设计，该系统设计主要包括电源、按键模块等。经过系统测试，证明达到了设计要求。1.功能1.用单片机编程实现自由切换播放三首歌曲，并且用LED灯进行显示，达到门铃效果。2.设计步骤1.前期工作通过大家对单片机的学习，能够通过keilC软件编写C语言程序，并且能够在Proteus仿真软件上成功的运行。2.电路结构音乐门铃的硬件电路由6个部分组成：单片机、时钟与复位电路、选择按键输入电路、音频发生器、音频放大器和扬声器。音乐门铃的硬件电路设计框图如下。时钟与复位

5、电路选择按键输入电路单片机音频发生器音频放大器扬声器图2-1音乐门铃硬件电路设计框图73.基本步骤先用c语言编写实现音乐门铃的程序代码，然后将c语言用keil软件生成hex文件下载到stc89c51集成芯片中，利用不同的频率发出不同的音调，利用延时产生不同的节拍，通过功率放大器传送到喇叭使其发出美妙的音乐。4.预期结果按下门铃键，即同普通门铃的工作方法一样，由AT89C51控制蜂鸣器放出美妙的音乐，提醒主人开门。3.硬件设计1.模拟仿真电路2.元件列表元件名称代号规格型号数量单片机U1AT89C5217晶振X112MHz1按钮K1K2轻触型2

6、电阻R110K1扬声器LS18R0.25W1八段数码管LED1电源Vcc+5v1电容C1、C430pF2C210uF13.发声原理首先要让单片机出一定频率的波形，因为音符的差别就是频率的差别，网上有音符频率对照表可以参考。所谓的节拍就是该频率的波形持续的时间，对于一般的乐曲先定好1/4拍是多少秒，然后计算出不同频率的波形在这个节拍上要重复几遍。后面的事情就简单了，根据乐曲自行编辑出一段代码，每两个代码代表一个音符，前面一个表示音符的频率，后面一个代表持续的时间。4.软件设计1.设计材料音符频率(HZ)简谱码(T值)低1DO26263628#1

7、DO#27763731低2RE29463853#2RE#31163928低3M33064021低4FA34964103#4FA#370641857低5SO39264260#5SO#41564331低6LA44064400#646664463低7SI49464524中1DO52364580#1DO#55464633中2RE58764684#2RE#62264732中3M65964777中4FA69864820音符频率(HZ)简谱码(T值)#4FA#74064860中5SO78464898#5SO#83164934中6LA88064968#693

8、264994中7SI98865030高1DO104665058#1DO#110965085高2RE117565110#2RE#124565134高3M1318651