/**
  ******************************************************************************
  * 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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2024-01-15	V1.0.0	AE TEAM

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Demo introduction:
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本示例功能：
(1).使用SPI进行对FLASH进行读写擦除操作
(2).SPI速率为1M

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测试环境:
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测试用板；
ES-GDB-ES8H018X
ES-PDS-E2+FLASH

辅助工具：
多功能接口转换工具ESBridge
逻辑分析仪

辅助软件：
ESBridge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) 将程序配置成SPI主机模式，初始化SPI。
(3) ESBridge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) 打开串口，等待接收Log日志。
(5) 打开逻辑分析仪观察SPI时序

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System clock:
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Internal HRC 48MHz

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Pin connection: 
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UART_TX_PIN  ----  PA9[GPIO_FUNC_1]
SPI_CLK_PIN  ----  PA26[GPIO_FUNC_3]
SPI_CS_PIN  ----  PA27[GPIO_FUNC_0]
SPI_MOSI_PIN  ----  PA24[GPIO_FUNC_3]
SPI_MISO_PIN  ----  PA25[GPIO_FUNC_3]