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

  this demo is based on the ht32f49041_sk board, in this demo, shows how to use
  fullduplex mode transfer data by dma mode in ti mode.
  the pins connection as follow:
  - spi2 slaver        spi1 master
  - pb12     <--->     pa4
  - pb13     <--->     pa5
  - pb14     <--->     pa6
  - pb15     <--->     pa7

