/**
  ******************************************************************************
  * 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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2021-9-25	V1.0.0	AE TEAM

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Demo introduction:
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本示例功能：LIN通信，中断方式收发数据，芯片接收到数据后，将数据原封不动发出。

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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：
LIN transceiver模块T151
USB转LIN调试器

辅助软件：
USB_LIN-V1.6.0

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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) 将程序配置的TX/RX引脚连接到T151的TX/RX引脚, T151的SLP管脚连接至VDD或PA7，然后连接LIN transceiver模块T151与USB转LIN调试器；
3) USB转LIN调试器通过USB口连接PC，打开上位机软件USB_LIN-V1.6.0，点击“刷新通信口”后，选择对应的设备，然后点击“打开通信口”建立连接；
4) 使用上位机配置设备模式及波特率等参数（设备模式-主机，波特率9600，心跳包时间-1000），打开通信口建立连接；
5) 复位芯片，或在线调试，运行程序；
6) 切换到高级发送窗口，配置参数（模式：主机发送，ID：0x07，校验：增强，数据：11 22 33 44 55 66 77 88），点击发送；
7）配置参数（模式：主机接收，ID：0x07），点击发送，若成功读回的数据为“88 77 66 55 44 33 22 11”，则实验成功。

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注意：
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1) 测试用板与辅助工具之间需要共地

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System clock:
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Internal HRC 32MHz.

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Pin connection: 
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LIN1_TX  ---- PA13[GPIO_FUNC_3]
LIN1_RX  ---- PA14[GPIO_FUNC_3]
LIN1_SLP ---- PA7[GPIO_FUNC_1]
