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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MCU进入stop模式和GPIO中断唤醒功能。

Function descriptions:
This sample demonstrates the MCU's entering the stop mode and the GPIO interrupt 
wake-up function.
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测试环境：
测试用板：DPM32M030_REV_A
MDK版本： 5.28

Test environment:
Test board: DPM32M030_REV_A
MDK Version: 5.28
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使用步骤：
1. 编译下载程序到MCU，并运行。
2. MCU进入stop模式，给予PA0下降沿中断可唤醒MCU。

Example execution steps:
1. Compile and download the program to MCU, and run it.
2. When the MCU enters the stop mode, an interrupt triggered by the falling edge on 
PA0 can wake up the MCU.
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注意事项：
唤醒引脚如下：
GPIO       -> PA0

Notes:
The Wakeup pins are as follows:
GPIO       -> PA0

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