STM32CubeF4

/**
  @page PWR_EnterStopMode PWR standby example
  
  @verbatim
  ******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
  * @file    Examples_LL/PWR/PWR_EnterStopMode/readme.txt 
  * @author  MCD Application Team
  * @brief   Description of the PWR STOP_MAINREGU mode example.
  ******************************************************************************
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  @endverbatim

@par Example Description

This example shows how to enter the system in STOP_MAINREGU mode.

After start-up LED2 is toggling during 5 seconds, then the system automatically 
enter in STOP_MAINREGU mode (Final state).

LED2 is used to monitor the system state as follows:
 - LED2 toggling : system in RUN mode
 - LED2 off : system in STOP_MAINREGU mode

@note To measure the current consumption in STOP_MAINREGU mode, remove JP6 jumper 
      and connect an ampere meter to JP6 to measure IDD current.     

@note This example can not be used in DEBUG mode due to the fact 
      that the Cortex-M4 core is no longer clocked during low power mode 
      so debugging features are disabled.

@par Directory contents 

  - PWR/PWR_EnterStopMode/Inc/stm32f4xx_it.h          Interrupt handlers header file
  - PWR/PWR_EnterStopMode/Inc/main.h                  Header for main.c module
  - PWR/PWR_EnterStopMode/Inc/stm32_assert.h          Template file to include assert_failed function
  - PWR/PWR_EnterStopMode/Src/stm32f4xx_it.c          Interrupt handlers
  - PWR/PWR_EnterStopMode/Src/main.c                  Main program
  - PWR/PWR_EnterStopMode/Src/system_stm32f4xx.c      STM32F4xx system source file

@par Hardware and Software environment

  - This example runs on STM32F411xx devices.
    
  - This example has been tested with STMicroelectronics NUCLEO-F411RE
    board and can be easily tailored to any other supported device
    and development board.

@par How to use it ? 

In order to make the program work, you must do the following :
 - Open your preferred toolchain
 - Rebuild all files and load your image into target memory
 - Run the example

 * <h3><center>&copy; COPYRIGHT STMicroelectronics</center></h3>
 */