/**
@page UART_Printf UART Printf example
@verbatim
******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
* @file UART/UART_Printf/Readme.txt
* @author MCD Application Team
* @brief Description of the UART Printf example.
******************************************************************************
* @attention
*
* Copyright (c) 2017 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.
_________________________
| ______________| _______________
| |USART3 | | HyperTerminal |
| | | | |
| | TX(PC10)|______________________|RX |
| | | | |
| | | RS232 Cable | |
| | | | |
| | RX(PC11)|______________________|TX |
| | | | |
| |______________| |_______________|
| |
| |
| |
| |
|_STM322xG_EVAL___________|
This implementation output the printf message on the Hyperterminal using USART3.
The USART3 is configured as follows:
- BaudRate = 9600 baud
- Word Length = 8 Bits
- One Stop Bit
- ODD parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit enabled
@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
@note The application needs to ensure that the SysTick time base is always set to 1 millisecond
to have correct HAL operation.
@par Directory contents
- UART/UART_Printf/Inc/stm32f2xx_hal_conf.h HAL configuration file
- UART/UART_Printf/Inc/stm32f2xx_it.h Interrupt handlers header file
- UART/UART_Printf/Inc/main.h Main program header file
- UART/UART_Printf/Src/stm32f2xx_it.c Interrupt handlers
- UART/UART_Printf/Src/main.c Main program
- UART/UART_Printf/Src/stm32f2xx_hal_msp.c HAL MSP module
- UART/UART_Printf/Src/system_stm32f2xx.c STM32F2xx system clock configuration file
@par Hardware and Software environment
- This example runs on STM32F207xx/217xx device.
- This example has been tested with STMicroelectronics STM322xG-EVAL
evaluation boards and can be easily tailored to any other supported device
and development board.
- STM322xG-EVAL Set-up
- Connect a null-modem female/female RS232 cable between the DB9 connector
CN16 (USART3) and PC serial port if you want to display data on the HyperTerminal.
- Please ensure that jumper JP22 is in position RS232.
- Hyperterminal configuration:
- Word 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
*/
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