目 录
1 概述................................................................................................................................................1
1.1 电子琴功能模式介绍 ......................................................................................................1
1.2 系统设计的任务与要求 ..................................................................................................1
2 系统总体方案及硬件设计 ...........................................................................................................2
2. 1 系统总体方案..................................................................................................................2
2.1.1 定时/计数器的设计和状态字定义.......................................................................2
2.1.2 音调数据表............................................................................................................4
2.2 总体硬件组成框图...........................................................................................................4
2.2.1 主要芯片简介........................................................................................................4
2.2.2 子系统模块一........................................................................................................6
2.2.3 子系统模块二........................................................................................................6
2.2.4 子系统模块三........................................................................................................6
2.2.5 AT89S52 复位模块 ...............................................................................................7
2.2.6 AT89S52 晶振模块 ...............................................................................................7
3 软件设计........................................................................................................................................8
3.1 系统软件设计 .................................................................................................................8
3.1.1 内置歌曲输出..........................................................................................................8
3.1.2 音阶键识别...............................................................................................................9
3.2 系统总流程图 ...............................................................................................................10
4 Proteus 软件仿真 ......................................................................................................................11
4.1 程序仿真.........................................................................................................................11
4.2 proteus 仿真 .................................................................................................................11
5 课程设计体会...............................................................................................................................15
参考文献..........................................................................................................................................16
附 1 源程序代码...........................................................................................................................17
附 2 系统原理图...........................................................................................................................22
