/**
  @page DMA2D_MemToMemWithBlending DMA2D memory to memory with blending example
  
  @verbatim
  ******************** (C) COPYRIGHT 2013 STMicroelectronics *******************
  * @file    DMA2D/DMA2D_MemToMemWithBlending/readme.txt 
  * @author  MCD Application Team
  * @version V1.3.0
  * @date    13-November-2013
  * @brief   Description of the DMA2D memory to memory with blending example.
  ******************************************************************************
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  @endverbatim

@par Example Description

This example shows how to configure DMA2D peripheral in Memory to Memory with 
blending transfer mode.

In this transfer mode two input sources are fitched : foreground and background.
In this example, the foreground and background are configured as follows:
- input memory address at FLASH memory 
- Color mode : RGB565 format
- The constant alpha for foreground is decreased to see the background.
- The alpha mode for foreground and background is configured to see two 
superposed images in the resulting image.

The DMA2D blends the two sources pixels to compute the resulting pixel. 
The transferred data to the output memory address is the result of the blending 
operation.

In this example, the layer 1 is configured to display the DMA2D output buffer 
(the result of the blending of the foreground and background).


@par Directory contents
  
  - DMA2D/DMA2D_MemToMemWithBlending/system_stm32f4xx.c   STM32F4xx system clock configuration file
  - DMA2D/DMA2D_MemToMemWithBlending/stm32f4xx_conf.h     Library Configuration file
  - DMA2D/DMA2D_MemToMemWithBlending/stm32f4xx_it.c       Interrupt handlers
  - DMA2D/DMA2D_MemToMemWithBlending/stm32f4xx_it.h       Interrupt handlers header file
  - DMA2D/DMA2D_MemToMemWithBlending/main.c               Main program
  - DMA2D/DMA2D_MemToMemWithBlending/main.h               Main program header file
  - DMA2D/DMA2D_MemToMemWithBlending/RGB565_230x170_1.h   Image used for DMAD2D validation
  - DMA2D/DMA2D_MemToMemWithBlending/RGB565_230x170_2.h   Image used for DMAD2D validation


@par Hardware and Software environment
 
  - This example runs on and STM32F429xx/439xx devices.
    
  - This example has been tested with STMicroelectronics STM324x9I-EVAL RevB
    (STM32F429xx/STM32F439xx Devices) evaluation boards 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:
 - Copy all source files from this example folder to the template folder under
   Project\STM32F4xx_StdPeriph_Templates
 - Open your preferred toolchain
  - Select "STM32F429_439xx" workspace related to the used device and Add 
    the following files in the project source list:
     - Utilities\STM32_EVAL\STM324x9I_EVAL\stm324x9i_eval.c
     - Utilities\STM32_EVAL\STM324x9I_EVAL\stm324x9i_eval_lcd.c 
     - Utilities\STM32_EVAL\STM324x9I_EVAL\stm324x9i_eval_fmc_sdram.c
     - Utilities\STM32_EVAL\STM324x9I_EVAL\stm324x9i_eval_ioe8.c
      
 - Rebuild all files and load your image into target memory
 - Run the example

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