/**
  @page DMA_CopyFromFlashToMemory DMA example
  
  @verbatim
  ******************** (C) COPYRIGHT 2016 STMicroelectronics *******************
  * @file    Examples_LL/DMA/DMA_CopyFromFlashToMemory/readme.txt 
  * @author  MCD Application Team
  * @version V1.0.0
  * @date    14-April-2017
  * @brief   Description of the DMA 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 describes how to use a DMA channel to transfer a word data buffer
from Flash memory to embedded SRAM. Peripheral initialization done using
LL unitary services functions for optimization purpose (performance and size).

At the beginning of the main program the SystemClock_Config() function is used to configure the system
clock (SYSCLK) to run at 72 MHz.

Then the LED_Init() function is used to initialize the LED2.

Then the Configure_DMA() function is used to configure the DMA1_Channel1 to transfer the contents of a 32-word data
buffer stored in Flash memory to the reception buffer declared in RAM.

The start of transfer is triggered by software(LL_DMA_EnableChannel()). DMA1_Channel1 memory-to-memory
transfer is enabled. Source and destination addresses incrementing is also enabled.
The transfer is started by setting the channel enable bit for DMA1_Channel1.
At the end of the transfer a Transfer Complete interrupt is generated since it
is enabled and the callback function (customized by user) is called.

Finally, aSRC_Const_Buffer and aDST_Buffer are compared through Buffercmp() in order to 
check buffers correctness.  

STM32F103RB-Nucleo's LED2 can be used to monitor the transfer status:
- LED2 is turn on if DMA data transferred consistency.
- LED2 is blinking every 1 sec in case of error.


@par Directory contents 

  - DMA/DMA_CopyFromFlashToMemory/Inc/stm32f1xx_it.h          Interrupt handlers header file
  - DMA/DMA_CopyFromFlashToMemory/Inc/main.h                  Header for main.c module  
  - DMA/DMA_CopyFromFlashToMemory/Inc/stm32_assert.h          Template file to include assert_failed function
  - DMA/DMA_CopyFromFlashToMemory/Src/stm32f1xx_it.c          Interrupt handlers
  - DMA/DMA_CopyFromFlashToMemory/Src/main.c                  Main program
  - DMA/DMA_CopyFromFlashToMemory/Src/system_stm32f1xx.c      STM32F1xx system source file

@par Hardware and Software environment

  - This example runs on STM32F103xB devices.
    
  - This example has been tested with STM32F103RB-Nucleo 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>
 */
