/**
  @page note Note for TrueSTUDIO
  
  @verbatim
  ******************** (C) COPYRIGHT 2011 STMicroelectronics ********************
  * @file    note.txt
  * @author  MCD Application Team
  * @version V3.5.0
  * @date    08-April-2011
  * @brief   This file contains the needed step to use "printf" with TrueSTUDIO 
  *          toolchain.
  ******************************************************************************
  * 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

The C runtime library include many functions, including some that typically 
handle I/O. The I/O related runtime functions include printf(), fopen(), fclose(),
and many others.

It is common to redirect the I/O from these functions to the actual embedded 
platform, such as redirecting printf() output to an LCD display or a serial cable,
or to redirect file operations like fopen() and fclose() to some Flash file 
system middleware.

The free Lite version of TrueSTUDIO do not support I/O redirection, and instead 
have do-nothing stubs compiled into the C runtime library.

To support printf() redirection in the professional version, you should do the following:
 - Open TrueSTUDIO professional and load your project. 
 - In the Project explorer, Right click on the project and select New->Other...
 - Expand System calls
 - Select Minimal System Calls Implementation and click next.
 - Click on Finish and verify that "syscalls.c" is added to your project.
 - Add the following code in the _write() function in "syscalls.c". 

  @code
   /*****************************************/
   int Index;
  
   for (Index = 0; Index < len; Index++)
   {
      __io_putchar( *ptr++ );
   }

   return len;
   /*****************************************/
   @endcode
   
 - Finally, Rebuild your project.

@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 32 and 128 Kbytes.  
 - Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx 
   microcontrollers where the Flash memory density ranges between 32 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>
 */