keil 程序，能实现信号的倍频采样，并将包络值送回上位机，实现上、下位机的通讯-It is a C language，it create a function that the computer can communicate with PC

USB口CH372通信，通过ATmega16编程实现应用程序所在上位机与从属下位机之间的通信-CH372 USB port communicates via an application programming ATmega16 PC and from where the communication between the subordinate position