/**
  ******************************************************************************
  * 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) 2024 Shanghai Eastsoft Microelectronics Co., Ltd. ALL rights reserved.
  *******************************************************************************
  */

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Version history:
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2024-05-24	V1.0.0	AE TEAM

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Demo introduction:
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本示例功能：
DMA外设到外设：
SPI0向Flash芯片写入数据，再将数据读出，通过DMA直接搬运到SPI1的发送端（读出的数据不经过RAM）。

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测试环境:
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测试用板；
ES-PDS-ES32VF2264，ES-PDS-E2+FLASH-V1.1

辅助工具：
多功能接口转换工具ES-Bridge

辅助软件：
ES-Bridge上位机软件

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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SP0的NSS/SCK/MISO/MOSI分别连接Flash芯片的CS/SCK/MISO/MOSI，SP1的NSS/SCK/MISO/MOSI分别连接ES-Bridge的CS/SCK/MISO/MOSI；
3) ES-Bridge通过USB线缆连接PC，打开上位机软件，“设备操作”选项里选择“打开”；
4) 上位机切换到SPI标签页，按照程序配置参数（从机模式-第二边沿采样-时钟极性：空闲高电平-片选极性：低电平-高位在前-频率：任意），取消Hex显示，点击打开；
5) 复位芯片，或在线调试，运行程序，观察SPI接收框打印的数据与程序发送给Flash的数据是否一致。

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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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Pin connection:
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SPI0_NSS  ---- (PA4, GPIO_FUNC_1)
SPI0_SCK  ---- (PA5, GPIO_FUNC_2)
SPI0_MISO ---- (PA6, GPIO_FUNC_2)
SPI0_MOSI ---- (PA7, GPIO_FUNC_2)

SPI1_NSS  ---- (PB12, GPIO_FUNC_1)
SPI1_SCK  ---- (PB13, GPIO_FUNC_2)
SPI1_MISO ---- (PB14, GPIO_FUNC_2)
SPI1_MOSI ---- (PB15, GPIO_FUNC_2)
