1、功能说明

    /* 简单描述工程功能 */
    STOP模式的进入和退出。


2、使用环境

    软件开发环境：
        KEIL MDK-ARM V5.34
        IAR EWARM 8.50.1

    硬件开发环境：
        基于全功能板N32H497ZGL7_EVB V1.0开发
       
3、使用说明
    
    /* 描述相关模块配置方法；例如:时钟，I/O等 */
    系统时钟配置：
        SystemClock：240MHz
            
    打印串口配置：
        USART：TX - PA9，RX - PA10，波特率115200
            
    GPIO配置：
        WAKEUP按键-PA0

    /* 描述Demo的测试步骤和现象 */
        在KEIL下编译后烧录到评估板，串接电流表，上电后一段时间进入STOP模式，电流明显变小。按下WAKEUP按键，退出STOP模式，电流变大。
        如果开启打印输出，可以看到串口输出“Entry STOP mode”，唤醒后输出“Exit STOP mode”。

4、注意事项
     在评估功耗的时候，要注意去掉打印


1. Function description
    
    /* Briefly describe the project function */
    Enter and exit STOP mode.

2. Use environment

    Software development environment: 
        KEIL MDK-ARM V5.34
        IAR EWARM 8.50.1

    Hardware development environment:
        Developed based on the full-function board N32H497ZGL7_EVB V1.0

3. Instructions for use
    
    /* Describe related module configuration methods; for example: clock, I/O, etc. */
    System Clock Configuration:
        SystemClock：240MHz
            
    Print Serial Port Configuration:
        USART：TX - PA9，RX - PA10, baud rate 115200
            
    GPIO Configuration: 
        WAKEUP button-PA0

    /* Describe the test steps and phenomena of the Demo */
        Compiled under KEIL and burned to the evaluation board, connected an ammeter in series, and entered STOP mode some time after powering up, 
        the current became significantly smaller. Press the WAKEUP button to exit the STOP mode, and the current becomes larger.
        If you turn on the printout, you can see that the serial port outputs "Enter STOP mode" and "Exit STOP mode" after waking up.

4. Attention
    When evaluating power consumption, pay attention to removing the printf

