/**
  ******************************************************************************
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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  * Copyright (C) 2021 Shanghai Eastsoft Microelectronics Co., Ltd. ALL rights reserved.
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  */

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Version history:
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2025-5-26	V1.0.0	AE TEAM

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Demo introduction:
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本示例功能：
深度休眠模式下的LPUART收发数据，通过串口接收数据，将接收到的数据同样的发回到上位
机，工作完后，软件进入休眠。

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测试环境:
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测试用板；
ES-PDS-ES8H0464ELLT

辅助工具：
多功能接口转换工具ESBridge

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) 连接TX/RX。
(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) 使用ECOM串口助手，选择对应串口号。
(5) 勾选转义字符\r\n，在数据输入框输入任意ASCII码字符，点击发送。
(6) 发送数据与接受数据一致，收到数据后。
(7) 打开ES-Bridge的功耗监视选项卡，打开功耗监视。
(8) 通过上述流程，发送对应字符到开发，软件的工作功耗和休眠功耗相差8ma的电流差。

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System clock:
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Internal HRC 48MHz

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Pin connection: 
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LPUART_TX_PIN  ----  PB0[GPIO_FUNC_7]
LPUART_RX_PIN  ----  PB1[GPIO_FUNC_7]