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proteus51多机通讯仿真//A=P2.0,B=P2.1voidhand_pc(void){P2&=~0x03;//A=0,B=0,4052选择(X0,Y0)PC端232SCON=0x50;state_flag=0;//state_flag=0与PC通讯}//A=P2.0,B=P2.1voidh