/**
  @page NVIC_WFIMode  NVIC in WFI mode example
  
  @verbatim
  ******************** (C) COPYRIGHT 2015 STMicroelectronics *******************
  * @file    NVIC/NVIC_WFIMode/readme.txt 
  * @author  MCD Application Team
  * @version V1.1.3
  * @date    15-December-2021
  * @brief   Description of the NVIC in WFI mode example.
  ******************************************************************************
  *
  * Copyright (c) 2015 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
   @endverbatim

@par  Example Description 

This example shows how to enter the system to WFI mode and wake-up from this mode 
using External interrupt.

In the associated software, the system clock is set to 72MHz. When the user presses
on the Key push button, the MCU enters in WFI mode. If the user presses again on the
Key push button, LED3 is toggled with a frequency depending on the system clock, this
is used to indicate whether the MCU is in WFI or RUN mode. 

Pressing key push button (generates rising edge on EXTI Line6) will put the core
in the WFI mode, causing the LED3 to stop toggling.
To wake-up from WFI mode you have to press again on the button which generates an
interrupt which exits the system from WFI mode. Then LED3 restarts toggling.


@par Directory contents 

  - NVIC/NVIC_WFIMode/stm32f30x_conf.h     Library Configuration file
  - NVIC/NVIC_WFIMode/stm32f30x_it.c       Interrupt handlers  
  - NVIC/NVIC_WFIMode/stm32f30x_it.h       Interrupt handlers header file
  - NVIC/NVIC_WFIMode/main.c               Main program
  - NVIC/NVIC_WFIMode/main.h               header file Main program
  - NVIC/NVIC_WFIMode/system_stm32f30x.c   STM32F30x system source file
  
@note The "system_stm32f30x.c" is generated by an automatic clock configuration 
      system and can be easily customized to your own configuration. 
      To select different clock setup, use the "STM32F30x_Clock_Configuration_V1.0.0.xls" 
      provided with the AN4152 package available on <a href="http://www.st.com/internet/mcu/family/141.jsp">  ST Microcontrollers </a>
         
@par Hardware and Software environment

  - This example runs on STM32F303xC and STM32F303xE Devices.
  
  - This example has been tested with STMicroelectronics STM32303C-EVAL (STM32F30x)
    evaluation board and can be easily tailored to any other supported device 
    and development board.

  - STM32303C-EVAL Set-up
    - Key push button
    
    
In order to make the program work, you must do the following :
 - Copy all source files from this example folder to the template folder under
   Projects\STM32F30x_StdPeriph_Templates
 - Open your preferred toolchain 
 - Add the following files to the project source list
   - Utilities\STM32_EVAL\STM32303C_EVAL\stm32303c_eval.c
 - Rebuild all files and load your image into target memory
 - Run the example


 */
