说明：  如标题,对应之前上传的用VC编写的USB采集电压的客户端程序，这是相应的单片机设计电路（PCB工程），需要烧写到单片中的固件代码（用winavr环境，C语言编写），以及电脑识别USB需要用到的LIBusb文件，都包含在内
(Such as title, corresponding to the previously uploaded VC prepared to collect voltage USB client program, which is the corresponding single-chip design circuit (PCB project), you need to be programmed into the chip in the firmware code (with winavr environment, C language) and LIBusb file USB need to use the computer to recognize, are included)