一个关于双机之间的通讯联系：包括串口设置。地址编码，按键设置等。另付proteus仿真原理图，可以动态观察。对学习多机通讯很有帮组-One on communication links between the two-machine: including the serial port settings. Address code, key settings. Extra proteus simulation diagram, can be dynamically observed. Multi