/**
  **************************************************************************
  * @file     readme.txt
  * @version  v2.0.5
  * @date     2022-05-20
  * @brief    readme
  **************************************************************************
  */

  this demo is based on the at-start board, in this demo, pa6, pa7, pb0 and
  pb1 output pwm waveform.
  tmr3 channel1 duty cycle = (tmr3_c1dt/ tmr3_pr)* 100 = 50%
  tmr3 channel2 duty cycle = (tmr3_c2dt/ tmr3_pr)* 100 = 37.5%
  tmr3 channel3 duty cycle = (tmr3_c3dt/ tmr3_pr)* 100 = 25%
  tmr3 channel4 duty cycle = (tmr3_c4dt/ tmr3_pr)* 100 = 12.5%

  for more detailed information. please refer to the application note document AN0085.

