mcs51系列单片机实现简单音乐盒。
platformio 用于编译Proteus仿真软件python src/make_song.py > src/music.h
pio run
src/config.h中包含单片机平台相关的设置，包括蜂鸣器引脚等；
src/make_song.py中包含乐曲的乐谱，修改后执行python src/make_song.py生成C语言代码，请手动替换src/song.c中的部分。
本项目使用sdcc作为编译器，不兼容Keil C，如要做适配请注意以下几个方面：
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