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

  this demo is based on the ht32f49163_sk board, in this demo, shows how to use the 
  ertc event output function, PC13 outputs an wakeup timer event every 2 seconds.
  
  attention: system need to pre configrue when pc13 need to be used!  the 
  pre-configuration code is in SystemInit() function.
