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

  this demo is based on the at-start board.
  in this demo, qspi command port operate erase/write/read with dma.
  and all operations are in qpi mode, if qspi test pass, led3 fresh,
  else led2 fresh.
  the qspi flash is en25qh128a. 
  - qspi io0   --->   pf8
  - qspi io1   --->   pf9
  - qspi io2   --->   pf7
  - qspi io3   --->   pf6
  - qspi sck   --->   pf10
  - qspi cs    --->   pg6

  for more detailed information. please refer to the application note document AN0088.

