File list (Check if you may need any files):
5.读取矩阵键盘并在4LED上显示按键值\A.hex
..................................\A.lnp
..................................\A.M51
..................................\A.plg
..................................\A_Opt.Bak
..................................\A_Uv2.Bak
..................................\main.c
..................................\STARTUP.A51
..................................\STARTUP.LST
..................................\STARTUP.OBJ
..................................\A.Uv2.bak
..................................\A.uvproj
..................................\A.opt.bak
..................................\main.__i
..................................\main.LST
..................................\main.OBJ
..................................\A
..................................\A_uvopt.bak
..................................\A.uvopt
..................................\A.uvgui_Administrator.bak
..................................\A.uvgui.Administrator
5.读取矩阵键盘并在4LED上显示按键值