/**
  @page FSMC_SRAM_DataMemory FSMC SRAM data memory example
  
  @verbatim
  ******************* (C) COPYRIGHT 2017 STMicroelectronics ********************
  * @file    FSMC/FSMC_SRAM_DataMemory/Readme.txt 
  * @author  MCD Application Team
  * @brief   Description of the FSMC SRAM data memory 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
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  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  @endverbatim
 
@par Example Description 


This example describes how to configure the FSMC controller to access the SRAM including heap and stack.

This example guides you through the different configuration steps by mean of HAL API
to use the IS61WV102416BLL-10MLI SRAM mounted on STM322xG-EVAL as data memory 
(including heap and stack).
  
Then the SystemClock_Config() function is used to configure the system clock (SYSCLK) 
to run at 120 MHz. 

The example scenario does not reflect a real application case, its purpose is to
provide only the procedure to follow to use the external SRAM as data memory.

This example does not use the default library startup file. It uses a modified 
startup file provided with the example. The user has to add the new startup 
file in the project source list. While startup, the SRAM memory is configured 
and initialized to be ready to contain data.
  
The user has to configure his preferred toolchain using the provided linker file.
The RAM zone is modified in order to use the external SRAM memory as a RAM.

At this stage, all the used data can be located in the external SRAM memory.

The user can use the debugger's watch to evaluate "uwTabAddr" and "MSPValue" variables
values which should be equal to "0x640xxxxx". 
 
@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 needs to ensure that the SysTick time base is always set to 1 millisecond
      to have correct HAL operation.


@par Directory contents
 
 - FSMC/FSMC_SRAM_DataMemory/Inc/stm32f2xx_hal_conf.h        Library Configuration file
 - FSMC/FSMC_SRAM_DataMemory/Inc/stm32f2xx_it.h              Interrupt handlers header file
 - FSMC/FSMC_SRAM_DataMemory/Inc//main.h                     Main program header file 
 - FSMC/FSMC_SRAM_DataMemory/Src/stm32f2xx_it.c              Interrupt handlers
 - FSMC/FSMC_SRAM_DataMemory/Src/main.c                      Main program 
 - FSMC/FSMC_SRAM_DataMemory/Src/system_stm32f2xx.c          STM32F2xx system clock configuration file 


@par Hardware and Software environment 

  - This example runs on STM32F207xx/217xx device.  
    
  - This example has been tested with STMicroelectronics STM322xG-EVAL 
    evaluation boards and can be easily tailored to any other supported device 
    and development board.

  - STM322xG-EVAL Set-up  
    - Please ensure that the jumper JP10 is not fitted in the position 2-3. 


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>
 */
