This is a RS232.

20 RS232通信（串口通信）\datasheet-相关芯片手册\MAX232.pdf
........................\......................\max485.pdf
........................\......................\PL2303.pdf
........................\RS232\232发送程序\232.c
........................\.....\...........\232.LST
........................\.....\...........\232.OBJ
........................\.....\...........\int
........................\.....\...........\int.hex
........................\.....\...........\int.lnp
........................\.....\...........\int.M51
........................\.....\...........\int.Opt
........................\.....\...........\int.plg
........................\.....\...........\int.Uv2
........................\.....\...........\int_Opt.Bak
........................\.....\...........\int_Uv2.Bak
........................\.....\...........\mainfun.LST
........................\.....\...........\mainfun.OBJ
........................\.....\...........\STARTUP.A51
........................\.....\...........\STARTUP.LST
........................\.....\...........\STARTUP.OBJ
........................\.....\...接收与发送程序\232.c
........................\.....\.................\232.LST
........................\.....\.................\232.OBJ
........................\.....\.................\int
........................\.....\.................\int.hex
........................\.....\.................\int.lnp
........................\.....\.................\int.M51
........................\.....\.................\int.Opt
........................\.....\.................\int.plg
........................\.....\.................\int.Uv2
........................\.....\.................\int_Opt.Bak
........................\.....\.................\int_Uv2.Bak
........................\.....\.................\mainfun.LST
........................\.....\.................\mainfun.OBJ
........................\.....\.................\STARTUP.A51
........................\.....\.................\STARTUP.LST
........................\.....\.................\STARTUP.OBJ
........................\.....\232接收与发送程序.rar
........................\.....\.......程序\232.c
........................\.....\...........\232.LST
........................\.....\...........\232.OBJ
........................\.....\...........\int
........................\.....\...........\int.hex
........................\.....\...........\int.lnp
........................\.....\...........\int.M51
........................\.....\...........\int.Opt
........................\.....\...........\int.plg
........................\.....\...........\int.Uv2
........................\.....\...........\int_Opt.Bak
........................\.....\...........\int_Uv2.Bak
........................\.....\...........\mainfun.LST
........................\.....\...........\mainfun.OBJ
........................\.....\...........\STARTUP.A51
........................\.....\...........\STARTUP.LST
........................\.....\...........\STARTUP.OBJ
........................\..485\232.c
........................\.....\232.LST
........................\.....\232.OBJ
........................\.....\232.__i
........................\.....\int
........................\.....\int.hex
........................\.....\int.lnp
........................\.....\int.M51
........................\.....\int.Opt
........................\.....\int.plg
........................\.....\int.Uv2
........................\.....\int_Opt.Bak
........................\.....\int_Uv2.Bak
........................\.....\mainfun.LST
........................\.....\mainfun.OBJ
........................\.....\STARTUP.A51
........................\.....\STARTUP.LST
........................\.....\STARTUP.OBJ
........................\Thumbs.db
........................\串口电路图.jpg
........................\RS232\232发送程序
........................\.....\232接收与发送程序
........................\.....\232接收程序
........................\datasheet-相关芯片手册
........................\RS232
........................\RS485
20 RS232通信（串口通信）

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