/**
  ******************************************************************************
  * 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
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  * 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) 2023 Shanghai Eastsoft Microelectronics Co., Ltd. ALL rights reserved.
  *******************************************************************************
  */

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Version history:
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2023-1-5	V1.0.0	AE TEAM

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Demo introduction:
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本示例功能：利用红外调制信号，实现UART无线通信。

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测试环境:
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测试用板；
ES-PDS-ES32VF2264，HRSDK-GMB-01-V1.2

辅助工具：
USB转红外模块

辅助软件：
串口调试助手上位机XCOM V2.0

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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) 将芯片的TX/RX引脚分别接HRSDK-GMB-01测试板的RM_T/RM_R，USB转红外模块接PC的USB口；
3) 将HRSDK-GMB-01测试板上红外对管RMT/RMR分别对准USB转红外模块的RMR/RMT；
4) 打开XCOM上位机，选择正确串口（USB-SERIAL），按照程序设置UART参数（波特率2400-1位停止位-8位数据位-无奇偶校验-正常模式），点击“打开串口”；
5) 在线调试，将g_rx_buf添加到监视窗，运行程序，上位机接收到芯片发来的字符串并打印在接收框；
6) 在上位机发送框输入字符串，点击“发送”，g_rx_buf接收到字符串。

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注意：
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1) 需要给HRSDK-GMB-01板供电（3.3V），并与ES-PDS-ES32VF2264共GND；
2) 波特率设置勿超过2400bps；
3) 同一组红外对管应互相错开，避免自发自收。
4) 红外传输距离应≤5m，角度应≤15°。

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System clock:
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HRC 48MHz

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Pin connection: 
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CUART1_TX ---- PA2 [GPIO_FUNC_2]
CUART1_RX ---- PA3 [GPIO_FUNC_2]
