通过反转法循环扫描矩阵键盘，并通过数码管显示数据

[{"title":"（ 10 个子文件 10KB ） 通过反转法循环扫描矩阵键盘，并通过数码管显示数据","children":[{"title":"14-矩阵键盘","children":[{"title":"keyboard.hex <span style='color:#111;'> 1.19KB </span>","children":null,"spread":false},{"title":"keyboard.plg <span style='color:#111;'> 392B </span>","children":null,"spread":false},{"title":"keyboard.LST <span style='color:#111;'> 4.28KB </span>","children":null,"spread":false},{"title":"keyboard.OBJ <span style='color:#111;'> 3.53KB </span>","children":null,"spread":false},{"title":"keyboard.Opt <span style='color:#111;'> 1023B </span>","children":null,"spread":false},{"title":"keyboard.M51 <span style='color:#111;'> 5.18KB </span>","children":null,"spread":false},{"title":"keyboard <span style='color:#111;'> 3.20KB </span>","children":null,"spread":false},{"title":"keyboard_Opt.Bak <span style='color:#111;'> 1.00KB </span>","children":null,"spread":false},{"title":"keyboard.c <span style='color:#111;'> 2.36KB </span>","children":null,"spread":false},{"title":"keyboard.Uv2 <span style='color:#111;'> 1.96KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]