双单片机串行发送接收（无中断）
..............................\Last Loaded S_communication.DBK
..............................\LCD_1602.h
..............................\STARTUP.A51
..............................\STARTUP.LST
..............................\STARTUP.OBJ
..............................\S_communication.DSN
..............................\S_communication.PWI
..............................\S_communication_1
..............................\S_communication_1.c
..............................\S_communication_1.hex
..............................\S_communication_1.lnp
..............................\S_communication_1.LST
..............................\S_communication_1.M51
..............................\S_communication_1.OBJ
..............................\S_communication_1.Opt
..............................\S_communication_1.plg
..............................\S_communication_1.Uv2
..............................\S_communication_1_Opt.Bak
..............................\S_communication_1_Uv2.Bak
..............................\S_communication_2
..............................\S_communication_2.c
..............................\S_communication_2.hex
..............................\S_communication_2.lnp
..............................\S_communication_2.LST
..............................\S_communication_2.M51
..............................\S_communication_2.OBJ
..............................\S_communication_2.Opt
..............................\S_communication_2.plg
..............................\S_communication_2.Uv2
..............................\S_communication_2_Opt.Bak
..............................\S_communication_2_Uv2.Bak