/**
  **************************************************************************
  * @file     readme.txt 
  * @brief    readme
  **************************************************************************
  */

  this demo is based on the at-start board, in this demo,
  otg1:
  when an usb device is attached to the otg1 host port, the device is enumerated and
  checked whether it can support hid device or not,the demo just support keyboard
  and mouse device.
  otg2: 
  show how to build a device of usb hid class protocol .
