Single-chip AT89S52 serial send receive process, has passed through debugging, may be used as reference.

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

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