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/**
@page USART_Communication_Rx_IT_Init USART Receiver example (IT Mode)
@verbatim
******************************************************************************
* @file Examples_LL/USART/USART_Communication_Rx_IT_Init/readme.txt
* @author MCD Application Team
* @brief Description of the USART_Communication_Rx_IT_Init example.
******************************************************************************
*
* Copyright (c) 2019-2021 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
This example shows how to configure GPIO and USART peripheral for receiving characters
from HyperTerminal (PC) in Asynchronous mode using Interrupt mode. Peripheral initialization is done
using LL initialization function to demonstrate LL init usage.
USART Peripheral is configured in asynchronous mode (115200 bauds, 8 data bit, 1 start bit, 1 stop bit, no parity).
No HW flow control is used.
GPIO associated to User push-button is linked with EXTI.
USART RX Not Empty interrupt is enabled.
Example execution:
When character is received on USART Rx line, a RXNE interrupt occurs.
USART IRQ Handler routine is then checking received character value.
On a specific value ('S' or 's'), LED2 is turned On.
Received character is echoed on Tx line.
On press on push button, LED2 is turned Off.
In case of errors, LED2 is blinking.
@par Keywords
Connectivity, USART, Asynchronous mode, RS-232, baud rate, Interrupt, HyperTerminal, Receiver
@par Directory contents
- USART/USART_Communication_Rx_IT_Init/Inc/stm32wbxx_it.h Interrupt handlers header file
- USART/USART_Communication_Rx_IT_Init/Inc/main.h Header for main.c module
- USART/USART_Communication_Rx_IT_Init/Inc/stm32_assert.h Template file to include assert_failed function
- USART/USART_Communication_Rx_IT_Init/Src/stm32wbxx_it.c Interrupt handlers
- USART/USART_Communication_Rx_IT_Init/Src/main.c Main program
- USART/USART_Communication_Rx_IT_Init/Src/system_stm32wbxx.c STM32WBxx system source file
@par Hardware and Software environment
- This example runs on STM32WB55RGVx devices.
- This example has been tested with P-NUCLEO-WB55 board and can be
easily tailored to any other supported device and development board.
- P-NUCLEO-WB55 Set-up
Connect USART1 TX/RX to respectively RX and TX pins of PC UART (could be done through a USB to UART adapter) :
- Connect STM32 MCU board USART1 TX pin (GPIO PA.09 connected to pin 19 in CN10)
to PC COM port RX signal
- Connect STM32 MCU board USART1 RX pin (GPIO PA.10 connected to pin 31 in CN10)
to PC COM port TX signal
- Connect STM32 MCU board GND to PC COM port GND signal
- Launch serial communication SW on PC (as HyperTerminal or TeraTerm) with proper configuration
(115200 bauds, 8 bits data, 1 stop bit, no parity, no HW flow control).
- Launch the program. Enter characters on PC communication SW side.
@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
* <h3><center>© COPYRIGHT STMicroelectronics</center></h3>
*/
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