/**
  ******************************************************************************
  * 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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2022-11-07	V1.0.0	AE TEAM

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Demo introduction:
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本示例功能：cdc_acm demo，演示cdc自发自收功能。

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测试环境:
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测试用板；
ES-PDS-ES32F369x-V2.1

辅助工具：

辅助软件：
XCOM-V2.6

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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) 使用USB TypeA to micro线缆，一端插入到PC的A型USB插座，另一端插入到开发板的USB_OTG端口；
3) 打开上位机XCOM（win7电脑须先安装串口驱动）；
4) 配置任意通信参数，打开串口；
5) 发送2048字节数据，XCOM中将接收到相同的数据；

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注意：
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1) VDD电压5V。

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System clock:
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PLL 48MHz.

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Pin connection:
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