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

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Version history:
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2022-01-21	V1.0.0	AE TEAM

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Demo introduction:
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本示例功能：通过AD16C4T的PWM输出模式2和互补输出功能，实现4通道7路互补中心对齐PWM输出，
通道1、2、3各输出2路PWM，通道4输出1路PWM。可通过ET高电平信号清除通道1输出。

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测试环境:
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测试用板；
ES-PDS-ES32F010xDB1

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) 将程序配置的通道对应的引脚连接ESBridge不同的逻辑笔通道；
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) 上位机切换到逻辑笔标签页，勾选相应通道，选择“开始”；
5) 在线调试，运行程序；
6) ET（PA1）接高电平，观察通道1输出是否被清除；恢复低电平后，观察通道1输出是否恢复。

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注意：
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1) 测试板与ESBridge需共GND。
2) CH1 50Hz   占空比 1000/10000
3) CH2 50Hz   占空比 3000/10000
4) CH3 50Hz   占空比 5000/10000
5) CH4 50Hz   占空比 7000/10000

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System clock:
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Internal HRC 32MHz

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Pin connection: 
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CH1O    ---- PA7[GPIO_FUNC_3]
CH1ON   ---- PA10[GPIO_FUNC_6]
CH2O    ---- PA8[GPIO_FUNC_3]
CH2ON   ---- PA13[GPIO_FUNC_6]
CH3O    ---- PA6[GPIO_FUNC_3]
CH3ON   ---- PA11[GPIO_FUNC_6]
CH4     ---- PA15[GPIO_FUNC_7]

ETRIN   ---- PA1[GPIO_FUNC_7]