/*!
    \file    readme.txt
    \brief   description of HRTIMER0 external event filtering example

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

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  This example is based on the GD32G553Q-EVAL-V1.0 board. This example shows how to
configure external event filtering. The ST0_CH0_O channel (PA8) and ST0_CH1_O channel
(PA9) output two independent PWM waveforms.
  The ST0_CH0_O channel set at Slave_TIMER0 compare 3 event and reset at compare 0 event.
  The ST0_CH1_O channel set at external event and reset at compare 3 event.
  The Slave_TIMER0 work in external event blanking mode and the blank is from counter
reset to HRTIMER_STxCMP0V. When the the falling edge of external event 5 happen in the blank,
it will be ignored.
  The waveforms on pins of PA8 and PA9 can be observed by oscilloscope.
  Connect the external pins PB6 and PA10 to use USART.
