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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。

Function description:
This sample demonstrates the analogue watchdog function of the ADC.
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测试环境：
测试用板：PY32F002A_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: PY32F002A_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. 编译下载程序到MCU，并运行；
2. PA0和PA1的电压值都小于0.4125V(供电电压为3.3V),不会进入看门狗中断，LED灯不亮；
3. PA0或PA1的电压值大于0.4125V(供电电压为3.3V)，进入看门狗中断，LED亮。

Example execution steps:
1. Compile and download the programme to MCU and run it;
2. PA0 and PA1 voltage value is less than 0.4125V (supply voltage is 3.3V), will 
not enter the watchdog interrupt, the LED will not light up;
3. The voltage value of PA0 or PA1 is greater than 0.4125V (supply voltage 
is 3.3V), it will enter the watchdog interrupt and the LED will be on.
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注意事项：

Notes:
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