/*!
    \file    readme.txt
    \brief   description of the ADC analog watchdog
    
    \version 2025-07-31, V3.3.2, firmware for GD32F4xx
*/

/*
    Copyright (c) 2025, 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 GD32450I-EVAL-V1.1 board, it shows how to
use the ADC analog watchdog to guard continuously an ADC channel.
The ADC is configured in continuous mode, PA3 is chosen as analog
input pin. Connect PA3 to PF6.

  Change the VR1 on the GD32450I-EVAL-V1.1 board, measure TP2 pad on the 
GD32450I-EVAL-V1.1 board, when the channel3 converted value is over the 
programmed analog watchdog high threshold (value 0x0A00) or below 
the analog watchdog low threshold(value 0x0400), an WDE interrupt 
will occur, and LED2 will be turned on. When the channel3 converted 
value is in safe range(among 0x0400 and 0x0A00), the LED2 will be 
turned off. 

  The analog input pin should configured to AN mode.We can watch 
adc_value in debug mode or by COM.
