/**
  @page CAN_LoopBack CAN LoopBack example
  
  @verbatim
  ******************** (C) COPYRIGHT 2011 STMicroelectronics *******************
  * @file    CAN/LoopBack/readme.txt 
  * @author  MCD Application Team
  * @version V3.5.0
  * @date    08-April-2011
  * @brief   Description of the CAN LoopBack example.
  ******************************************************************************
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  ******************************************************************************
   @endverbatim

@par Example Description 

This example provides a description of 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 125 Kbps. The received frame is checked and some LEDs light
up to indicate whether the communication was successful. Then, an extended data
frame is transmitted at 500 Kbps. Reception is done in the interrupt handler
when the message becomes pending in the FIFO. Finally, the LEDs indicate if both
transmission and reception have been successful.

User can select CAN1 or CAN2 cell using the private defines in main.c :

@code
#define __CAN1_USED__
/* #define __CAN2_USED__*/   
@endcode

@note When using CAN2, please check that your device is Connectivity line.

@par Directory contents 

  - CAN/LoopBack/stm32f10x_conf.h     Library Configuration file
  - CAN/LoopBack/stm32f10x_it.c       Interrupt handlers
  - CAN/LoopBack/stm32f10x_it.h       Interrupt handlers header file
  - CAN/LoopBack/main.c               Main program
  - CAN/LoopBack/system_stm32f10x.c   STM32F10x system source file
  
@par Hardware and Software environment 

  - This example runs on STM32F10x Connectivity line, High-Density, Medium-Density, 
    XL-Density and Low-Density Devices.
  
  - This example has been tested with STMicroelectronics STM3210C-EVAL (Connectivity line),
    STM3210E-EVAL (High-Density and XL-Density) and STM3210B-EVAL (Medium-Density)
    evaluation boards and can be easily tailored to any other supported device and
    development board.
    To select the STMicroelectronics evaluation board used to run the example, 
    uncomment the corresponding line in stm32_eval.h file   

  - STM3210C-EVAL Set-up 
    - Use LED1, LED2, LED3 and LED4 connected respectively to PD.07, PD.13, PF.03
      and PD.04 pins
      
  - STM3210E-EVAL Set-up 
    - Use LD1, LD2, LD3 and LD4 leds connected respectively to PF.06, PF0.7, 
      PF.08 and PF.09 pins

  - STM3210B-EVAL Set-up  
    - Use LD1, LD2, LD3 and LD4 leds connected respectively to PC.06, PC.07, PC.08
      and PC.09 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\STM32F10x_StdPeriph_Template
 - Open your preferred toolchain 
 - Rebuild all files and load your image into target memory
 - Run the example 

@note
 - Low-density Value line devices are STM32F100xx microcontrollers where the 
   Flash memory density ranges between 16 and 32 Kbytes.
 - Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx 
   microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes.
 - Medium-density Value line devices are STM32F100xx microcontrollers where
   the Flash memory density ranges between 64 and 128 Kbytes.  
 - Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx 
   microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
 - High-density Value line devices are STM32F100xx microcontrollers where
   the Flash memory density ranges between 256 and 512 Kbytes.   
 - High-density devices are STM32F101xx and STM32F103xx microcontrollers where
   the Flash memory density ranges between 256 and 512 Kbytes.
 - XL-density devices are STM32F101xx and STM32F103xx microcontrollers where
   the Flash memory density ranges between 512 and 1024 Kbytes.
 - Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.
    
 * <h3><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h3>
 */