/**
  ******************************************************************************
  * 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) 2022 Shanghai Eastsoft Microelectronics Co., Ltd. ALL rights reserved.
  *******************************************************************************
  */

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Version history:
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2023-04-17       V1.0.0      AE TEAM

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Demo introduction:
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本示例功能：winusb自发自收演示。该例程使用中断的方式收发数据。

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测试环境:
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测试用板；
ES-PDS-ES32VF2264LT-T2
需要对开发板进行如下操作：
1.闭合JP1、JP2、JP3、JP4。
2.断开SB1、SB2、SB3。

辅助工具：
ES-BUR-ESLINK2OB

辅助软件：
XCOM上位机软件
ES-USB-Lab

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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) 打开XCOM上位机软件，配置参数（波特率-115200，1位停止位，8位数据位，无奇偶校验），打开串口；
3) 复位芯片，或在线调试，运行程序；
4) 等待USB设备枚举完成。
5) 在ES-USB-Lab上位机BULK_DATA模块的发送框输入字符串，点击“发送”，接收框中打印出相同的字符串。

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注意：
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System clock:
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PLL 48M

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Pin connection: 
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