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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COMP比较器唤醒功能，PA1作为比较器正端输入，32/64VCC作为比较器负端输
入，进入stop模式后，通过调整PA1上的输入电压，产生中断唤醒stop模式。

Function descriptions:
This example demonstrates the COMP comparator wake-up function, with PA1 as the
positive input and 32/64VCC as the negative input of the comparator. After
entering stop mode, the interrupt wake-up stop mode is generated by adjusting
the input voltage on PA1.
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测试环境：
测试用板：PY32F031_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: PY32F031_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. LED亮起后按下按键，进入stop模式，LED熄灭；
3. 在PA1上输入从小于1.6V到的大于1.7V电压时，产生中断，LED点亮；
4. 接下来LED每隔200ms进行翻转，程序正常运行。

Example execution steps:
1.Compile and download the program to MCU and run it;
2.After the LED lights up, press the button to enter the stop mode, and the
LED goes out;
3.When inputting a voltage from less than 1.6V to greater than 1.7V on PA1, an
interrupt is generated and the LED lights up;
4. Next, the LED flips every 200ms and the program runs normally
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注意事项：

Notes:

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