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                                样例使用说明
                              Sample Description
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功能描述：
此样例演示了ADC的模拟看门狗功能，当开启模拟看门狗通道的电压值超过上下限时，会进
入看门狗中断。

Function descriptions:
This example demonstrates the analog watchdog function of ADC. When the voltage
value of the analog watchdog channel exceeds the upper and lower limits, it will
enter the watchdog interrupt.
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测试环境：
测试用板：PY32F040_STK
MDK版本： 5.28
IAR版本： 9.20
GCC 版本：GNU Arm Embedded Toolchain 10.3-2021.10

Test environment:
Test board: PY32F040_STK
MDK Version: 5.28
IAR Version: 9.20
GCC Version: GNU Arm Embedded Toolchain 10.3-2021.10
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使用步骤：
1. 编译并下载程序
2. 通道4(PA4)的电压值小于1.65V，LED灯不会被点亮
3. 通道4(PA4)的电压值大于1.65V，LED灯被点亮。

Example execution steps:
1. Compile and download the program and run it
2. the voltage value of channel 4 (PA4) is lower than 1.65V, the LED off
3. the voltage value of channel 4 (PA4) is higher than 1.65V, the LED on
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注意事项：
如果需要使用按键:
StartKit版本为V2.0以下,需将StartKit.h中的StartKitVersion 2 注释掉，并打开
StartKitVersion 1
StartKit版本为V2.0及以上版本,则无需操作

Notes:
If you need to use buttons:
StartKit version is below V2.0, you need to comment StartKitVersion 2 in
StartKit.h, and open StartKitVersion 1 
StartKit version is V2.0 and above, no operation is required

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