/*!
    \file    readme.txt
    \brief   description of the logic AND function use ADC_CONV and GPIO as input

    \version 2025-07-15, V1.0.0, firmware for GD32G5x3
*/

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*/

  This demo is based on the GD32G553Q-EVAL-V1.0 board, it shows the logic AND function of IN0 and IN1. In
this demo, PB6 and ADC_CONV is selected as input of SIGS0 and SIGS1 respectively. PA2 is used as CLA0OUT.

  ADC clock is set to 216MHz/16 = 13.5MHz. ADC conversion is triggered by software every 1 millisecond, so ADC_CONV
signal appears every 1 millisecond. ADC_CONV is a pulse which lasts 12.5 ADC clock.
  PB6(IN0) is configured as input and is connect to Vcc. Connect PA2 to oscilloscope. The waveform will like this:


                  ___                    ___                    ___
                 |   |                  |   |                  |   |
           ______|   |__________________|   |__________________|   |________

                 |<------- 1ms -------->|                      |---|
                                                                 |
                                                                 |
                                                                 --->26.86us((2.5+12.5)*1/13.5MHz)
