/**
  @page LTDC_ColorKeying LTDC Color Keying example
  
  @verbatim
  ******************** (C) COPYRIGHT 2013 STMicroelectronics *******************
  * @file    LTDC/LTDC_ColorKeying/readme.txt 
  * @author  MCD Application Team
  * @version V1.3.0
  * @date    13-November-2013
  * @brief   Description of the LTDC Color Keying 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 Licens
  *   
  ******************************************************************************
  @endverbatim

@par Example Description

This example shows how to enable and use the color keying functionality.

After LCD initialization, LCD layer 1 and color keying configuration, an image 
is displayed on LCD.
Color keying is enabled/disabled on the image when the tamper button is pressed.
      
 Color Keying :
 --------------
 If the Color Keying is enabled, all pixels are compared to the color key. 
 If they match the programmed RGB value, all channels (ARGB) of that pixel 
 are set to 0.


@par Directory contents
    
  - LTDC/LTDC_ColorKeying/system_stm32f4xx.c   STM32F4xx system clock configuration file
  - LTDC/LTDC_ColorKeying/stm32f4xx_conf.h     Library Configuration file
  - LTDC/LTDC_ColorKeying/stm32f4xx_it.c       Interrupt handlers
  - LTDC/LTDC_ColorKeying/stm32f4xx_it.h       Interrupt handlers header file
  - LTDC/LTDC_ColorKeying/main.c               Main program
  - LTDC/LTDC_ColorKeying/main.h               Main program header file


@par Hardware and Software environment
  
  - This example runs on and STM32F429xx/439xx devices.
    
  - This example has been tested with STMicroelectronics STM32429I-EVAL 
    (STM32F429xx/STM32F439xx Devices) evaluation boards and can be easily 
    tailored to any other supported device and development board.
  
  - This example has been tested with STMicroelectronics STM324x9I-EVAL RevB 
    board which includes the MB1046 LCD 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 and Add the following files in the project 
    source list :
     - Utilities\STM32_EVAL\STM324x9I_EVAL\stm324x9i_eval.c
     
 - Rebuild all files and load your image into target memory
 - Run the example
  
 * <h3><center>&copy; COPYRIGHT STMicroelectronics</center></h3>
 */
                                   