wenkong_junshi/Examples/ADC/ADC1_analog_watchdog

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

\version 2017-02-10, V1.0.0, firmware for GD32F30x
\version 2018-10-10, V1.1.0, firmware for GD32F30x
\version 2018-12-25, V2.0.0, firmware for GD32F30x
\version 2020-09-30, V2.1.0, firmware for GD32F30x
*/

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*/

This demo is based on the GD32307C-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 and PC3 is chosen as analog input pin.
Change the VR1 on the GD32307C-EVAL-V1.1 board, measure TP pad on the 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 on. When the VR converted value is
in safe range(among 0x0400 and 0x0A00), the LED2 will be off.
The analog input pin should be configured to AIN mode.
We can watch VR converted value by COM0.