    /**
  @page CortexM_MPU Cortex-M3 MPU example

  @verbatim
  ******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
  * @file    CORTEXM/CORTEXM_MPU/readme.txt 
  * @author  MCD Application Team
  * @brief   Description of the CortexM MPU 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 presents the MPU feature. The example purpose is to configure a 
memory region as privileged read only region and tries to perform read and write 
operation in different mode.

If the access is permitted LED1 is toggling. If the access is not permitted, 
a memory management fault is generated and LED3 is ON.

To generate an MPU memory fault exception due to an access right error, uncomment
the following line "PrivilegedReadOnlyArray[0] = 'e';" in the "stm32_mpu.c" file.

@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
      based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
      a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
      than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
      To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
      
@note The application need to ensure that the SysTick time base is always set to 1 millisecond
      to have correct HAL operation.

@par Directory contents 

  - CortexM/MPU/Inc/stm32f2xx_hal_conf.h    HAL configuration file
  - CortexM/MPU/Inc/stm32f2xx_it.h          Interrupt handlers header file
  - CortexM/MPU/Inc/main.h                  Header for main.c module  
  - CortexM/MPU/Inc/stm32_mpu.h             MPU management
  - CortexM/MPU/Src/stm32f2xx_it.c          Interrupt handlers
  - CortexM/MPU/Src/main.c                  Main program
  - CortexM/MPU/Src/system_stm32f2xx.c      STM32F2xx system source file
  - CortexM/MPU/Src/stm32_mpu.c             MPU management

@par Hardware and Software environment

  - This example runs on STM32F207xx devices.
    
  - This example has been tested with NUCLEO-207ZG 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
 - Add the required example files
   - stm32_mpu.c

 - Rebuild all files and load your image into target memory
 - Run the example

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