2个独立按键控制蜂鸣器发出不同声音

[{"title":"（ 6 个子文件 22KB ） 2个独立按键控制蜂鸣器发出不同声音","children":[{"title":"80C31","children":[{"title":"Debug","children":[{"title":"Debug.SDI <span style='color:#111;'> 2.27KB </span>","children":null,"spread":false},{"title":"Makefile <span style='color:#111;'> 1.03KB </span>","children":null,"spread":false},{"title":"Debug.lst <span style='color:#111;'> 5.42KB </span>","children":null,"spread":false},{"title":"Debug.HEX <span style='color:#111;'> 290B </span>","children":null,"spread":false}],"spread":true},{"title":"SOUND.ASM <span style='color:#111;'> 1.41KB </span>","children":null,"spread":false}],"spread":true},{"title":"SOUND.pdsprj <span style='color:#111;'> 18.35KB </span>","children":null,"spread":false}],"spread":true}]