/*!
    \file    readme.txt
    \brief   description of the ADC1 analog watchdog
    
    \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.
*/

  Connect the external voltage to PA3 on the GD32H75EY-EVAL-V1.0 board. when the PA3(channel15) 
converted value is over the programmed analog watchdog 0 high threshold (value 0x0A00) or below 
the analog watchdog 0 low threshold(value 0x0400), an WDE0 interrupt will occur, and 
LED3 will be on. When the PA3 converted value is in safe range(among 0x0400 and 0x0A00),
the LED3 will be off.

  The analog input pin should be configured to AIN mode.

  We can watch PA3 converted value by COM.

  This example requires printing floating-point data. Please configure the
"Settings->GD ARM MCU Linker->Miscellaneous" option in the Embedded 
Builder project and check "Use float with nano printf" to enable this functionality.