/**
  @page AES_MODES  Use AES to encrypt then to decrypt data
  
  @verbatim
  ******************** (C) COPYRIGHT 2012 STMicroelectronics *******************
  * @file    AES/AES_MODES/readme.txt 
  * @author  MCD Application Team
  * @version V1.1.1
  * @date    13-April-2012
  * @brief   Description of the AES encryption decryption 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 provides a short description of how to configure the AES hardware 
accelerator to encrypt then to decrypt text with the different modes ECB, CBC 
et CTR.

Select the AES modes to be performed by uncommenting the corresponding line inside 
the main.c file.

// #define AES_ECB
// #define AES_CBC
// #define AES_CTR

This example is a basic example using polling on flag, neither interrupt nor 
DMA capability are used.

@par Directory contents 

  - AES/AES_MODES/stm32l1xx_conf.h    Library Configuration file
  - AES/AES_MODES/stm32l1xx_it.c      Interrupt handlers
  - AES/AES_MODES/stm32l1xx_it.h      Interrupt handlers header file
  - AES/AES_MODES/main.c              Main program
  - AES/AES_MODES/system_stm32l1xx.c  STM32L1xx system source file
  
@note The "system_stm32l1xx.c" is generated by an automatic clock configuration 
      system and can be easily customized to your own configuration. 
      To select different clock setup, use the "STM32L1xx_Clock_Configuration_V1.1.0.xls" 
      provided with the AN3309 package available on <a href="http://www.st.com/internet/mcu/family/141.jsp">  ST Microcontrollers </a>
         
@par Hardware and Software environment

  - This example runs on STM32L162 Ultra Low Power High-Density and Medium-Density Plus Devices.
  
  - This example has been tested with STMicroelectronics STM32L152D-EVAL (STM32L1xx 
    Ultra Low Power High-Density) evaluation board and can be easily tailored 
    to any other supported device and development board.

  - STM32L152D-EVAL Set-up
    - Use LED1, LED2, LED3 and LED4 connected respectively to PD.03, PD.07, PG.14
      and PG.15 pins 
    
@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\STM32L1xx_StdPeriph_Templates
 - Open your preferred toolchain 
 - Rebuild all files and load your image into target memory
 - Run the example

@note
- Ultra Low Power Medium-density devices are STM32L151xx and STM32L152xx 
  microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
- Ultra Low Power Medium-density Plus devices are STM32L151xx, STM32L152xx and 
  STM32L162xx microcontrollers where the Flash memory density is 256 Kbytes.
- Ultra Low Power High-density devices are STM32L151xx, STM32L152xx and STM32L162xx 
  microcontrollers where the Flash memory density is 384 Kbytes.
    
 * <h3><center>&copy; COPYRIGHT STMicroelectronics</center></h3>
 */


