/**
  **************************************************************************
  * @file     readme.txt 
  * @version  v2.0.0
  * @date     2021-11-26
  * @brief    readme
  **************************************************************************
  */

  this demo provides a description of how to use the usb otg host peripheral.
  
  when an usb device is attached to the host port, the device is enumerated and
  checked whether it msc device.

