前言....................................................................................................................................................2 1 方案论证......................................................................................................................................2 1. 1 控制模块选择方案...........................................................................................................2 1. 2 按键选择方案...................................................................................................................3 2 系统硬件设计..............................................................................................................................3 2. 1 系统组成及总体框图.......................................................................................................3 2. 2 元件介绍...........................................................................................................................4 2. 2. 1 AT89S52..................................................................................................................4 2. 2. 2 LM386......................................................................................................................6 2. 2. 3 LED 数码管.............................................................................................................8 2. 3 显示电路...........................................................................................................................9 2. 4 各功能模块原理图...........................................................................................................9 2. 4. 1 AT89S52 模块电路原理图.....................................................................................9 2. 4. 2 键盘扫描模块电路原理图..................................................................................10 2. 4. 3 数码管显示模块电路原理图..............................................................................11 2. 4. 4 音频处理模块电路原理图..................................................................................12 2. 4. 5 电源模块电路原理图..........................................................................................12 3 系统软件设计............................................................................................................................13 3. 1 音乐相关知识.................................................................................................................13 3. 2 如何用单片机实现音乐的节拍.....................................................................................13 3. 3 如何用单片机产生音频脉冲.........................................................................................14 3. 4 系统总体功能流程图.....................................................................................................15 4 电路仿真....................................................................................................................................18 4. 1 ISIS 软件介绍................................................................................................................18 4. 2 仿真图介绍.....................................................................................................................18 4. 3 仿真图.........................................................................................................................19 5 PCB 印制板制作.........................................................................................................................20 5. 1 印制板制作的要求.........................................................................................................20 5. 2 印制电路板图.................................................................................................................20 6 系统调试......................................................................................................................................22 6. 1 软件仿真调试.................................................................................................................22 6. 2 软件调试.........................................................................................................................22 7 调试结论......................................................................................................................................22 附录 1： 元器件清单.......................................................................................................................23 附录 2： 主要电路原理图...............................................................................................................24 附录 3： 主要程序...........................................................................................................................25 参考文献： ......................................................................................................................................28
