104 lines
4.0 KiB
Plaintext
104 lines
4.0 KiB
Plaintext
/**
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@page UART_Printf UART Printf example
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@verbatim
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******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
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* @file UART/UART_Printf/Readme.txt
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* @author MCD Application Team
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* @brief Description of the UART Printf example.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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@endverbatim
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@par Example Description
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Re-routing of the C library printf function to the UART.
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The UART outputs a message on the HyperTerminal.
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_________________________
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| ______________| _______________
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| |USART3 | | HyperTerminal |
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| | | | |
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| | TX(PC10)|______________________|RX |
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| | | | |
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| | | RS232 Cable | |
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| | | | |
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| | RX(PC11)|______________________|TX |
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| | | | |
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| |______________| |_______________|
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|_STM322xG_EVAL___________|
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This implementation output the printf message on the Hyperterminal using USART3.
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The USART3 is configured as follows:
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- BaudRate = 9600 baud
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- Word Length = 8 Bits
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- One Stop Bit
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- ODD parity
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- Hardware flow control disabled (RTS and CTS signals)
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- Receive and transmit enabled
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@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
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based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
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a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
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than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
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To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
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@note The application needs to ensure that the SysTick time base is always set to 1 millisecond
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to have correct HAL operation.
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@par Directory contents
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- UART/UART_Printf/Inc/stm32f2xx_hal_conf.h HAL configuration file
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- UART/UART_Printf/Inc/stm32f2xx_it.h Interrupt handlers header file
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- UART/UART_Printf/Inc/main.h Main program header file
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- UART/UART_Printf/Src/stm32f2xx_it.c Interrupt handlers
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- UART/UART_Printf/Src/main.c Main program
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- UART/UART_Printf/Src/stm32f2xx_hal_msp.c HAL MSP module
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- UART/UART_Printf/Src/system_stm32f2xx.c STM32F2xx system clock configuration file
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@par Hardware and Software environment
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- This example runs on STM32F207xx/217xx device.
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- This example has been tested with STMicroelectronics STM322xG-EVAL
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evaluation boards and can be easily tailored to any other supported device
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and development board.
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- STM322xG-EVAL Set-up
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- Connect a null-modem female/female RS232 cable between the DB9 connector
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CN16 (USART3) and PC serial port if you want to display data on the HyperTerminal.
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- Please ensure that jumper JP22 is in position RS232.
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- Hyperterminal configuration:
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- Word Length = 7 Bits
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- One Stop Bit
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- Odd parity
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- BaudRate = 9600 baud
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- flow control: None
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@par How to use it ?
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In order to make the program work, you must do the following :
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- Open your preferred toolchain
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- Rebuild all files and load your image into target memory
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- Run the example
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*/
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