/**
  @page CAN_LoopBack CAN LoopBack example
  
  @verbatim
  ******************** (C) COPYRIGHT 2013 STMicroelectronics *******************
  * @file    CAN/CAN_LoopBack/readme.txt 
  * @author  MCD Application Team
  * @version V1.3.0
  * @date    13-November-2013
  * @brief   Description of the CAN LoopBack 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 set a communication with the CAN in loopback mode.

The CAN cell first performs a transmission and a reception of a standard data
frame by polling at 175 Kbps. The received frame is checked and some LEDs light
up to indicate whether the communication was successful.

User can select CAN1 or CAN2 cell using the defines in main.h file:
@code
#define USE_CAN1
/* #define USE_CAN2*/ 
@endcode

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


@par Hardware and Software environment
 
  - This example runs on STM32F405xx/407xx, STM32F415xx/417xx, STM32F427xx/437xx and 
    STM32F429xx/439xx devices.
    
  - This example has been tested with STMicroelectronics STM324xG-EVAL (STM32F40xx/
    STM32F41xx Devices), STM32437I-EVAL (STM32F427xx/STM32F437xx Devices) and 
    STM324x9I-EVAL RevB (STM32F429xx/STM32F439xx Devices) evaluation boards and 
    can be easily tailored to any other supported device and development board.

  - STM324xG-EVAL and STM32437I-EVAL Set-up 
    - Use LED1 and LED2 connected respectively to PG.06 and PG.08 pins

  - STM324x9I-EVAL RevB Set-up
    - Use LED1 and LED2 connected respectively to PG.06 and PG.07 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\STM32F4xx_StdPeriph_Templates
 - Open your preferred toolchain 
 - Select the project workspace related to the used device 
   - If "STM32F40_41xxx" is selected as default project Add the following files in the project source list:
     - Utilities\STM32_EVAL\STM3240_41_G_EVAL\stm324xg_eval.c
        
   - If "STM32F427_437xx" is selected as default project Add the following files in the project source list:
     - Utilities\STM32_EVAL\STM324x7I_EVAL\stm324x7i_eval.c
          
   - If "STM32F429_439xx" is selected as default project 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>
 */
