/**
  ******************************************************************************
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * Copyright (C) Shanghai Eastsoft Microelectronics Co., Ltd. ALL rights reserved.
  *******************************************************************************
  */

<--------------------------------------------------------------------------------
Version history:
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2020-05-27  V1.0.0      AE TEAM

<--------------------------------------------------------------------------------
Demo introduction:
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通过QSPI直接模式读写外部FLASH（W25Q128）

<--------------------------------------------------------------------------------
测试环境:
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测试用板；
ES-PDS-ES32F369x-V2.x
微雪W25QXX

辅助软件：
无

<--------------------------------------------------------------------------------
测试步骤：
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1) 编译工程，编译通过后将程序下载到目标芯片；
2) 正确连接ES-PDS-ES32F369x和微雪W25QXX的QSPI信号线、电源和地；
3) 在线调试，将g_wdata和g_rdata加入监视窗；
4) 运行程序，观察g_rdata的数据是否和g_wdata一致。

<--------------------------------------------------------------------------------
注意：
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1) W25QXX的电源和地需要连接到ES-PDS的GND和VDD
2) W25QXX与ES-PDS-ES32F369x之间的连线应尽可能短，否则可能会出现干扰导致读数据错误
3) 不推荐使用ES-PDS-ES32F369x的PB10和PB11管脚作为QSPI1_IO2及QSPI1_IO3，如果坚持使用则可能因存在较大干扰出现数据错误

<--------------------------------------------------------------------------------
System clock:   48MHz
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External HOSC[12MHz] divided by 3, then PLL to 48Mhz.

<--------------------------------------------------------------------------------
Pin connection:
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QSPI1_NSS  ---- (PB12, GPIO_FUNC_6)
QSPI1_SCK  ---- (PB13, GPIO_FUNC_6)
QSPI1_IO0  ---- (PB14, GPIO_FUNC_6)
QSPI1_IO1  ---- (PB15, GPIO_FUNC_6)
QSPI1_IO2  ---- (PD8, GPIO_FUNC_6)
QSPI1_IO3  ---- (PD9, GPIO_FUNC_6)

