Windows下STM32 USB虚拟串口驱动程序。本人经多次实验发现，必须在开发时，设置CDC的PID和VID两个参数与驱动程序中stmcdc.inf中的数字相同。否则，系统将不可识别STM32的USB口为串口。(STM32 USB virtual serial port driver under Windows. I have many experiments found that must be in development, set the CDC PID and VID, two pa