In this case the code for the microcontroller bipolar communications, can also be derived for multi-level communication. There simulation attached, hope to help a friend in need.

单片机双机多机通讯\Last Loaded 通讯仿真.DBK
..................\主机程序\STARTUP.A51
..................\........\STARTUP.LST
..................\........\STARTUP.OBJ
..................\........\zj
..................\........\zj.c
..................\........\zj.hex
..................\........\zj.lnp
..................\........\zj.LST
..................\........\zj.M51
..................\........\zj.OBJ
..................\........\zj.plg
..................\........\zj.uvopt
..................\........\zj.uvproj
..................\........\zj_uvopt.bak
..................\........\zj_uvproj.bak
..................\从机程序\cj
..................\........\cj.c
..................\........\cj.hex
..................\........\cj.lnp
..................\........\cj.LST
..................\........\cj.M51
..................\........\cj.OBJ
..................\........\cj.plg
..................\........\cj.uvopt
..................\........\cj.uvproj
..................\........\cj_uvopt.bak
..................\........\cj_uvproj.bak
..................\........\STARTUP.A51
..................\........\STARTUP.LST
..................\........\STARTUP.OBJ
..................\通讯仿真.DSN
..................\通讯仿真.PWI
..................\通讯仿真.SDF
..................\主机程序
..................\从机程序
单片机双机多机通讯

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