File list (Check if you may need any files):
3.按键识别并通过串口发送到上位机
................................\HEHE.C
................................\HEHE.LST
................................\HEHE.OBJ
................................\KEY
................................\KEY.hex
................................\KEY.lnp
................................\KEY.M51
................................\KEY.Opt
................................\KEY.plg
................................\KEY.Uv2
................................\KEY_Opt.Bak
................................\KEY_Uv2.Bak
................................\STARTUP.A51