/**
  ******************************************************************************
  * 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) 2021 Shanghai Eastsoft Microelectronics Co., Ltd. ALL rights reserved.
  *******************************************************************************
  */

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Version history:
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2021-12-9   V1.0.0  AE TEAM

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Demo introduction:
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本示例功能：在Micro SD卡上创建FAT文件系统，创建并打开文件ESSEMI.txt，向该文件写入“上海东软载波微电子有限公司”，
关闭文件后重新打开，读取文件内容后关闭文件，然后对内容进行比较，若与写入内容相同，则开发板LED7闪烁，否则LED6闪烁。
程序执行完毕后，可用读卡器在电脑上查看MCU在Micro SD卡上创建的文件及内容。

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测试环境:
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测试用板；
ES-PDS-ES32F369x-V2.1，
微雪 Micro SD卡存储模块
闪迪 ultra Micro SDHC 16G

辅助工具：

辅助软件：

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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) 将芯片的NSS/SCK/MISO/MOSI分别连接Micro SD卡存储模块的CS/SCK/MISO/MOSI；
3) 复位芯片，或在线调试，运行程序；
4) 程序运行成功，则开发板LED7闪烁，否则LED6闪烁。 

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注意：
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1) ES-PDS-E2+FLASH需要供电（3.3V），且整个测试环境需要共GND。

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System clock:
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External HOSC[12MHz] divided by 3, then PLL to 72MHz.

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Pin connection: 
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SPI1_NSS  ---- (PC0, GPIO_FUNC_1)
SPI1_SCK  ---- (PC1, GPIO_FUNC_4)
SPI1_MISO ---- (PC2, GPIO_FUNC_4)
SPI1_MOSI ---- (PC3, GPIO_FUNC_4)