/**
  **************************************************************************
  * @file     readme.txt
  * @brief    readme
  **************************************************************************
  */

  this demo is based on the ht32f49163_sk board, in this demo, shows how to use
  the ordinary and preempt oversampling.
  the trigger source is software
  the convert data as follow:
  - adc1_ordinary_valuetab[0]  --->  adc1_channel_4
  - adc1_ordinary_valuetab[1]  --->  adc1_channel_5
  - adc1_ordinary_valuetab[2]  --->  adc1_channel_6
  - adc1_preempt_valuetab[0]   --->  adc1_channel_7
  - adc1_preempt_valuetab[1]   --->  adc1_channel_8
  - adc1_preempt_valuetab[2]   --->  adc1_channel_9
