STM32CubeF3

/**
  @page UART_Printf UART Printf example
  
  @verbatim
  ******************** (C) COPYRIGHT 2016 STMicroelectronics *******************
  * @file    UART/UART_Printf/readme.txt 
  * @author  MCD Application Team
  * @brief   Description of the UART Printf example.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  @endverbatim

@par Example Description 

Re-routing of the C library printf function to the UART.
The UART outputs a message on the HyperTerminal.

Board: STM32F303ZE-Nucleo Rev B
Tx Pin: PD.08
Rx Pin: PD.09
   _________________________ 
  |           ______________|                       _______________
  |          |USART         |                      | HyperTerminal |
  |          |              |                      |               |
  |          |           TX |______________________|RX             |
  |          |              |                      |               |
  |          |              |    ST-Link Cable     |               |      
  |          |              |                      |               |
  |          |           RX |______________________|TX             |          
  |          |              |                      |               |           
  |          |______________|                      |_______________|          
  |                         |                       
  |                         |                    
  |                         |                      
  |                         |                      
  |_STM32_Board_____________|                      

LED2 is ON when there is an error occurrence.

The USART is configured as follows:
    - BaudRate = 9600 baud  
    - Word Length = 8 Bits (7 data bit + 1 parity bit)
    - One Stop Bit
    - Odd parity
    - Hardware flow control disabled (RTS and CTS signals)
    - Reception and transmission are enabled in the time

@note USARTx/UARTx instance used and associated resources can be updated in "main.h"
file depending hardware configuration used.

@note When the parity is enabled, the computed parity is inserted at the MSB
position of the transmitted data.


@par Directory contents 

  - UART/UART_Printf/Inc/stm32f3xx_hal_conf.h    HAL configuration file
  - UART/UART_Printf/Inc/stm32f3xx_it.h          IT interrupt handlers header file
  - UART/UART_Printf/Inc/main.h                  Header for main.c module  
  - UART/UART_Printf/Src/stm32f3xx_it.c          Interrupt handlers
  - UART/UART_Printf/Src/main.c                  Main program
  - UART/UART_Printf/Src/stm32f3xx_hal_msp.c     HAL MSP module
  - UART/UART_Printf/Src/system_stm32f3xx.c      STM32F3xx system source file


@par Hardware and Software environment

  - This example runs on STM32F303xE devices.
    
  - This example has been tested with STM32F303ZE-Nucleo Rev B board and can be
    easily tailored to any other supported device and development board.    

  - STM32F303ZE-Nucleo Rev B Set-up: 
    Connect ST-Link cable to the PC USB port to display data on the HyperTerminal. 
      A virtual COM port will then appear in the HyperTerminal. 
    @note Make sure that :
      SB5 is ON and SB6 is ON for USART3 communication between target and ST-Link (by default)

  - Hyperterminal configuration:
    - Data Length = 7 Bits
    - One Stop Bit
    - Odd parity
    - BaudRate = 9600 baud
    - Flow control: None 

@par How to use it ? 

In order to make the program work, you must do the following :
 - Open your preferred toolchain 
 - Rebuild all files and load your image into target memory
 - Run the example



 */