/*!
    \file    readme.txt
    \brief   description of the USB device dual core application

    \version 2026-02-04, V1.3.0, firmware for GD32H75E
*/

/*
    Copyright (c) 2026, GigaDevice Semiconductor Inc.

    Redistribution and use in source and binary forms, with or without modification, 
are permitted provided that the following conditions are met:

    1. Redistributions of source code must retain the above copyright notice, this 
       list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright notice, 
       this list of conditions and the following disclaimer in the documentation 
       and/or other materials provided with the distribution.
    3. Neither the name of the copyright holder nor the names of its contributors 
       may be used to endorse or promote products derived from this software without 
       specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
OF SUCH DAMAGE.
*/

  This demo is based on the GD32H75EY-EVAL-V1.0 board. It describes how to use USB device
application based on the GD32H75E multi core support feature integrating the Device 
Communication Class (CDC) and Human Interface (HID) in the same project.

  This is a typical application on how to use the GD32H75E USB OTG Device peripheral, 
where GD32 is enumerated as a CDC device in the Full Speed mode, and also as a HID 
device in the High Speed mode, using the native PC Host HID/CDC drivers to which
the internal test board is connected.

When the application is started, the user has just to plug the two USB cables into a PC host and two
USB devices (CDC/HID) are automatically detected. A new VCP drive appears in the system window
for the CDC device and serial communication operations can be performed as with any other serial
communication drive. A new custom HID device is detected. For more details about custom HID, please 
refer to custom_hid example.