3个IO口扫16键
.............\123456.prj
.............\123456.SRC

.............\ddd.DSN
.............\ddd.PWI
.............\Last Loaded ddd.DBK
.............\led.h
.............\led1.h
.............\LISA1.SDF
.............\scan
.............\scan.hex
.............\scan.lnp
.............\scan.M51
.............\scan.Opt
.............\scan.plg
.............\scan.Uv2
.............\scan_Opt.Bak
.............\Text1.c
.............\Text1.LST
.............\Text1.OBJ