File list (Check if you may need any files):
【J】PWM应用：蜂鸣器演奏乐曲
............................\buzzer.c
............................\buzzer.h
............................\Demo.dep
............................\Demo.ewd
............................\Demo.ewp
............................\Demo.eww
............................\main.c
............................\main.rar
............................\music.c
............................\music.h
............................\startup_ewarm.c
............................\systemInit.c
............................\systemInit.h
............................\《化蝶》.bin
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