目 录
1 引言...........................................................................................................................................4
2.1 设计任务与要求....................................................................................................................5
2.2 方案的论证和选取................................................................................................................5
3 硬件电路的设计.......................................................................................................................7
3.1 单片机系统设计框图............................................................................................................7
3.2 单片机外围电路....................................................................................................................8
3.3 时钟电路................................................................................................................................9
3.5 按键电路..............................................................................................................................11
3.6 ISP 下载口电路....................................................................................................................11
3.7LED 彩灯显示电路...............................................................................................................12
3.8 12864 液晶电路....................................................................................................................12
3.9 音乐播放电路......................................................................................................................14
3.10 直流稳压电源电路............................................................................................................15
4 系统软件设计.........................................................................................................................16
4.1 单片机系统设计主程序流程图..........................................................................................16
4.2 音乐产生程序......................................................................................................................20
4.3 定时器子程序设计序..........................................................................................................21
4.4 液晶显示子程序..................................................................................................................29
参考文献.....................................................................................................................................32
