这是一个单片机到单片机的单向串行通信，包括了主机和从机的程序和Proteus的仿真图-This is a single chip to one-way single-chip serial communication, including the master and slave processes and the simulation of Fig Proteus

VB串口画坐标曲线，将下位机传来的数据读出来，用图线显示出来-VB serial painting coordinate curve, will read out the data from the next-bit machine, the line is displayed in Fig.