774 lines
29 KiB
C
774 lines
29 KiB
C
/**
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******************************************************************************
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* @file stm32f3xx_hal_uart_ex.c
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* @author MCD Application Team
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* @brief Extended UART HAL module driver.
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* This file provides firmware functions to manage the following extended
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* functionalities of the Universal Asynchronous Receiver Transmitter Peripheral (UART).
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* + Initialization and de-initialization functions
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* + Peripheral Control functions
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*
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*
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2016 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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@verbatim
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==============================================================================
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##### UART peripheral extended features #####
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==============================================================================
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(#) Declare a UART_HandleTypeDef handle structure.
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(#) For the UART RS485 Driver Enable mode, initialize the UART registers
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by calling the HAL_RS485Ex_Init() API.
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@endverbatim
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f3xx_hal.h"
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/** @addtogroup STM32F3xx_HAL_Driver
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* @{
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*/
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/** @defgroup UARTEx UARTEx
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* @brief UART Extended HAL module driver
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* @{
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*/
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#ifdef HAL_UART_MODULE_ENABLED
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macros ------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/** @defgroup UARTEx_Private_Functions UARTEx Private Functions
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* @{
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*/
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static void UARTEx_Wakeup_AddressConfig(UART_HandleTypeDef *huart, UART_WakeUpTypeDef WakeUpSelection);
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/**
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* @}
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*/
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/* Exported functions --------------------------------------------------------*/
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/** @defgroup UARTEx_Exported_Functions UARTEx Exported Functions
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* @{
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*/
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/** @defgroup UARTEx_Exported_Functions_Group1 Initialization and de-initialization functions
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* @brief Extended Initialization and Configuration Functions
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*
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@verbatim
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===============================================================================
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##### Initialization and Configuration functions #####
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===============================================================================
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[..]
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This subsection provides a set of functions allowing to initialize the USARTx or the UARTy
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in asynchronous mode.
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(+) For the asynchronous mode the parameters below can be configured:
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(++) Baud Rate
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(++) Word Length
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(++) Stop Bit
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(++) Parity: If the parity is enabled, then the MSB bit of the data written
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in the data register is transmitted but is changed by the parity bit.
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(++) Hardware flow control
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(++) Receiver/transmitter modes
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(++) Over Sampling Method
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(++) One-Bit Sampling Method
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(+) For the asynchronous mode, the following advanced features can be configured as well:
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(++) TX and/or RX pin level inversion
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(++) data logical level inversion
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(++) RX and TX pins swap
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(++) RX overrun detection disabling
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(++) DMA disabling on RX error
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(++) MSB first on communication line
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(++) auto Baud rate detection
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[..]
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The HAL_RS485Ex_Init() API follows the UART RS485 mode configuration
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procedures (details for the procedures are available in reference manual).
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@endverbatim
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Depending on the frame length defined by the M1 and M0 bits (7-bit,
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8-bit or 9-bit), the possible UART formats are listed in the
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following table.
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Table 1. UART frame format.
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+-----------------------------------------------------------------------+
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| M1 bit | M0 bit | PCE bit | UART frame |
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|---------|---------|-----------|---------------------------------------|
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| 0 | 0 | 0 | | SB | 8 bit data | STB | |
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|---------|---------|-----------|---------------------------------------|
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| 0 | 0 | 1 | | SB | 7 bit data | PB | STB | |
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|---------|---------|-----------|---------------------------------------|
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| 0 | 1 | 0 | | SB | 9 bit data | STB | |
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|---------|---------|-----------|---------------------------------------|
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| 0 | 1 | 1 | | SB | 8 bit data | PB | STB | |
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|---------|---------|-----------|---------------------------------------|
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| 1 | 0 | 0 | | SB | 7 bit data | STB | |
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|---------|---------|-----------|---------------------------------------|
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| 1 | 0 | 1 | | SB | 6 bit data | PB | STB | |
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+-----------------------------------------------------------------------+
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* @{
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*/
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/**
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* @brief Initialize the RS485 Driver enable feature according to the specified
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* parameters in the UART_InitTypeDef and creates the associated handle.
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* @param huart UART handle.
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* @param Polarity Select the driver enable polarity.
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* This parameter can be one of the following values:
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* @arg @ref UART_DE_POLARITY_HIGH DE signal is active high
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* @arg @ref UART_DE_POLARITY_LOW DE signal is active low
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* @param AssertionTime Driver Enable assertion time:
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* 5-bit value defining the time between the activation of the DE (Driver Enable)
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* signal and the beginning of the start bit. It is expressed in sample time
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* units (1/8 or 1/16 bit time, depending on the oversampling rate)
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* @param DeassertionTime Driver Enable deassertion time:
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* 5-bit value defining the time between the end of the last stop bit, in a
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* transmitted message, and the de-activation of the DE (Driver Enable) signal.
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* It is expressed in sample time units (1/8 or 1/16 bit time, depending on the
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* oversampling rate).
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_RS485Ex_Init(UART_HandleTypeDef *huart, uint32_t Polarity, uint32_t AssertionTime,
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uint32_t DeassertionTime)
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{
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uint32_t temp;
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/* Check the UART handle allocation */
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if (huart == NULL)
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{
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return HAL_ERROR;
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}
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/* Check the Driver Enable UART instance */
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assert_param(IS_UART_DRIVER_ENABLE_INSTANCE(huart->Instance));
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/* Check the Driver Enable polarity */
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assert_param(IS_UART_DE_POLARITY(Polarity));
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/* Check the Driver Enable assertion time */
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assert_param(IS_UART_ASSERTIONTIME(AssertionTime));
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/* Check the Driver Enable deassertion time */
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assert_param(IS_UART_DEASSERTIONTIME(DeassertionTime));
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if (huart->gState == HAL_UART_STATE_RESET)
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{
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/* Allocate lock resource and initialize it */
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huart->Lock = HAL_UNLOCKED;
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#if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
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UART_InitCallbacksToDefault(huart);
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if (huart->MspInitCallback == NULL)
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{
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huart->MspInitCallback = HAL_UART_MspInit;
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}
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/* Init the low level hardware */
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huart->MspInitCallback(huart);
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#else
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/* Init the low level hardware : GPIO, CLOCK, CORTEX */
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HAL_UART_MspInit(huart);
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#endif /* (USE_HAL_UART_REGISTER_CALLBACKS) */
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}
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huart->gState = HAL_UART_STATE_BUSY;
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/* Disable the Peripheral */
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__HAL_UART_DISABLE(huart);
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/* Perform advanced settings configuration */
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/* For some items, configuration requires to be done prior TE and RE bits are set */
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if (huart->AdvancedInit.AdvFeatureInit != UART_ADVFEATURE_NO_INIT)
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{
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UART_AdvFeatureConfig(huart);
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}
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/* Set the UART Communication parameters */
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if (UART_SetConfig(huart) == HAL_ERROR)
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{
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return HAL_ERROR;
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}
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/* Enable the Driver Enable mode by setting the DEM bit in the CR3 register */
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SET_BIT(huart->Instance->CR3, USART_CR3_DEM);
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/* Set the Driver Enable polarity */
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MODIFY_REG(huart->Instance->CR3, USART_CR3_DEP, Polarity);
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/* Set the Driver Enable assertion and deassertion times */
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temp = (AssertionTime << UART_CR1_DEAT_ADDRESS_LSB_POS);
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temp |= (DeassertionTime << UART_CR1_DEDT_ADDRESS_LSB_POS);
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MODIFY_REG(huart->Instance->CR1, (USART_CR1_DEDT | USART_CR1_DEAT), temp);
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/* Enable the Peripheral */
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__HAL_UART_ENABLE(huart);
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/* TEACK and/or REACK to check before moving huart->gState and huart->RxState to Ready */
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return (UART_CheckIdleState(huart));
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}
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/**
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* @}
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*/
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/** @defgroup UARTEx_Exported_Functions_Group2 IO operation functions
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* @brief Extended functions
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*
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@verbatim
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===============================================================================
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##### IO operation functions #####
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===============================================================================
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This subsection provides a set of Wakeup and FIFO mode related callback functions.
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(#) Wakeup from Stop mode Callback:
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(+) HAL_UARTEx_WakeupCallback()
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@endverbatim
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* @{
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*/
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/**
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* @brief UART wakeup from Stop mode callback.
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* @param huart UART handle.
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* @retval None
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*/
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__weak void HAL_UARTEx_WakeupCallback(UART_HandleTypeDef *huart)
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{
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/* Prevent unused argument(s) compilation warning */
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UNUSED(huart);
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/* NOTE : This function should not be modified, when the callback is needed,
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the HAL_UARTEx_WakeupCallback can be implemented in the user file.
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*/
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}
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/**
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* @}
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*/
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/** @defgroup UARTEx_Exported_Functions_Group3 Peripheral Control functions
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* @brief Extended Peripheral Control functions
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*
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@verbatim
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===============================================================================
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##### Peripheral Control functions #####
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===============================================================================
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[..] This section provides the following functions:
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(+) HAL_MultiProcessorEx_AddressLength_Set() API optionally sets the UART node address
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detection length to more than 4 bits for multiprocessor address mark wake up.
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(+) HAL_UARTEx_StopModeWakeUpSourceConfig() API defines the wake-up from stop mode
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trigger: address match, Start Bit detection or RXNE bit status.
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(+) HAL_UARTEx_EnableStopMode() API enables the UART to wake up the MCU from stop mode
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(+) HAL_UARTEx_DisableStopMode() API disables the above functionality
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[..] This subsection also provides a set of additional functions providing enhanced reception
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services to user. (For example, these functions allow application to handle use cases
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where number of data to be received is unknown).
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(#) Compared to standard reception services which only consider number of received
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data elements as reception completion criteria, these functions also consider additional events
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as triggers for updating reception status to caller :
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(+) Detection of inactivity period (RX line has not been active for a given period).
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(++) RX inactivity detected by IDLE event, i.e. RX line has been in idle state (normally high state)
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for 1 frame time, after last received byte.
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(++) RX inactivity detected by RTO, i.e. line has been in idle state
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for a programmable time, after last received byte.
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(+) Detection that a specific character has been received.
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(#) There are two mode of transfer:
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(+) Blocking mode: The reception is performed in polling mode, until either expected number of data is received,
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or till IDLE event occurs. Reception is handled only during function execution.
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When function exits, no data reception could occur. HAL status and number of actually received data elements,
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are returned by function after finishing transfer.
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(+) Non-Blocking mode: The reception is performed using Interrupts or DMA.
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These API's return the HAL status.
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The end of the data processing will be indicated through the
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dedicated UART IRQ when using Interrupt mode or the DMA IRQ when using DMA mode.
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The HAL_UARTEx_RxEventCallback() user callback will be executed during Receive process
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The HAL_UART_ErrorCallback()user callback will be executed when a reception error is detected.
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(#) Blocking mode API:
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(+) HAL_UARTEx_ReceiveToIdle()
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(#) Non-Blocking mode API with Interrupt:
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(+) HAL_UARTEx_ReceiveToIdle_IT()
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(#) Non-Blocking mode API with DMA:
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(+) HAL_UARTEx_ReceiveToIdle_DMA()
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@endverbatim
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* @{
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*/
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/**
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* @brief By default in multiprocessor mode, when the wake up method is set
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* to address mark, the UART handles only 4-bit long addresses detection;
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* this API allows to enable longer addresses detection (6-, 7- or 8-bit
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* long).
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* @note Addresses detection lengths are: 6-bit address detection in 7-bit data mode,
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* 7-bit address detection in 8-bit data mode, 8-bit address detection in 9-bit data mode.
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* @param huart UART handle.
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* @param AddressLength This parameter can be one of the following values:
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* @arg @ref UART_ADDRESS_DETECT_4B 4-bit long address
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* @arg @ref UART_ADDRESS_DETECT_7B 6-, 7- or 8-bit long address
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_MultiProcessorEx_AddressLength_Set(UART_HandleTypeDef *huart, uint32_t AddressLength)
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{
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/* Check the UART handle allocation */
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if (huart == NULL)
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{
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return HAL_ERROR;
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}
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/* Check the address length parameter */
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assert_param(IS_UART_ADDRESSLENGTH_DETECT(AddressLength));
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huart->gState = HAL_UART_STATE_BUSY;
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/* Disable the Peripheral */
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__HAL_UART_DISABLE(huart);
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/* Set the address length */
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MODIFY_REG(huart->Instance->CR2, USART_CR2_ADDM7, AddressLength);
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/* Enable the Peripheral */
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__HAL_UART_ENABLE(huart);
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/* TEACK and/or REACK to check before moving huart->gState to Ready */
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return (UART_CheckIdleState(huart));
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}
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/**
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* @brief Set Wakeup from Stop mode interrupt flag selection.
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* @note It is the application responsibility to enable the interrupt used as
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* usart_wkup interrupt source before entering low-power mode.
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* @param huart UART handle.
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* @param WakeUpSelection Address match, Start Bit detection or RXNE/RXFNE bit status.
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* This parameter can be one of the following values:
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* @arg @ref UART_WAKEUP_ON_ADDRESS
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* @arg @ref UART_WAKEUP_ON_STARTBIT
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* @arg @ref UART_WAKEUP_ON_READDATA_NONEMPTY
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_UARTEx_StopModeWakeUpSourceConfig(UART_HandleTypeDef *huart, UART_WakeUpTypeDef WakeUpSelection)
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{
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HAL_StatusTypeDef status = HAL_OK;
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uint32_t tickstart;
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/* check the wake-up from stop mode UART instance */
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assert_param(IS_UART_WAKEUP_FROMSTOP_INSTANCE(huart->Instance));
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/* check the wake-up selection parameter */
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assert_param(IS_UART_WAKEUP_SELECTION(WakeUpSelection.WakeUpEvent));
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/* Process Locked */
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__HAL_LOCK(huart);
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huart->gState = HAL_UART_STATE_BUSY;
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/* Disable the Peripheral */
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__HAL_UART_DISABLE(huart);
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/* Set the wake-up selection scheme */
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MODIFY_REG(huart->Instance->CR3, USART_CR3_WUS, WakeUpSelection.WakeUpEvent);
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if (WakeUpSelection.WakeUpEvent == UART_WAKEUP_ON_ADDRESS)
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{
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UARTEx_Wakeup_AddressConfig(huart, WakeUpSelection);
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}
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/* Enable the Peripheral */
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__HAL_UART_ENABLE(huart);
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/* Init tickstart for timeout management */
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tickstart = HAL_GetTick();
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/* Wait until REACK flag is set */
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if (UART_WaitOnFlagUntilTimeout(huart, USART_ISR_REACK, RESET, tickstart, HAL_UART_TIMEOUT_VALUE) != HAL_OK)
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{
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status = HAL_TIMEOUT;
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}
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else
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{
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/* Initialize the UART State */
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huart->gState = HAL_UART_STATE_READY;
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}
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/* Process Unlocked */
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__HAL_UNLOCK(huart);
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return status;
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}
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/**
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* @brief Enable UART Stop Mode.
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* @note The UART is able to wake up the MCU from Stop 1 mode as long as UART clock is HSI or LSE.
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* @param huart UART handle.
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_UARTEx_EnableStopMode(UART_HandleTypeDef *huart)
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{
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/* Process Locked */
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__HAL_LOCK(huart);
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/* Set UESM bit */
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ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_UESM);
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/* Process Unlocked */
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__HAL_UNLOCK(huart);
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return HAL_OK;
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}
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/**
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* @brief Disable UART Stop Mode.
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* @param huart UART handle.
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_UARTEx_DisableStopMode(UART_HandleTypeDef *huart)
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{
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/* Process Locked */
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__HAL_LOCK(huart);
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/* Clear UESM bit */
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ATOMIC_CLEAR_BIT(huart->Instance->CR1, USART_CR1_UESM);
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/* Process Unlocked */
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__HAL_UNLOCK(huart);
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return HAL_OK;
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}
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/**
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* @brief Receive an amount of data in blocking mode till either the expected number of data
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* is received or an IDLE event occurs.
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* @note HAL_OK is returned if reception is completed (expected number of data has been received)
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* or if reception is stopped after IDLE event (less than the expected number of data has been received)
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* In this case, RxLen output parameter indicates number of data available in reception buffer.
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* @note When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
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* the received data is handled as a set of uint16_t. In this case, Size must indicate the number
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* of uint16_t available through pData.
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* @param huart UART handle.
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* @param pData Pointer to data buffer (uint8_t or uint16_t data elements).
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* @param Size Amount of data elements (uint8_t or uint16_t) to be received.
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* @param RxLen Number of data elements finally received
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* (could be lower than Size, in case reception ends on IDLE event)
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* @param Timeout Timeout duration expressed in ms (covers the whole reception sequence).
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* @retval HAL status
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*/
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HAL_StatusTypeDef HAL_UARTEx_ReceiveToIdle(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint16_t *RxLen,
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uint32_t Timeout)
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{
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uint8_t *pdata8bits;
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uint16_t *pdata16bits;
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uint16_t uhMask;
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uint32_t tickstart;
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/* Check that a Rx process is not already ongoing */
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if (huart->RxState == HAL_UART_STATE_READY)
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{
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if ((pData == NULL) || (Size == 0U))
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{
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return HAL_ERROR;
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}
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huart->ErrorCode = HAL_UART_ERROR_NONE;
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huart->RxState = HAL_UART_STATE_BUSY_RX;
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huart->ReceptionType = HAL_UART_RECEPTION_TOIDLE;
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huart->RxEventType = HAL_UART_RXEVENT_TC;
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/* Init tickstart for timeout management */
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tickstart = HAL_GetTick();
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huart->RxXferSize = Size;
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huart->RxXferCount = Size;
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/* Computation of UART mask to apply to RDR register */
|
|
UART_MASK_COMPUTATION(huart);
|
|
uhMask = huart->Mask;
|
|
|
|
/* In case of 9bits/No Parity transfer, pRxData needs to be handled as a uint16_t pointer */
|
|
if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
|
|
{
|
|
pdata8bits = NULL;
|
|
pdata16bits = (uint16_t *) pData;
|
|
}
|
|
else
|
|
{
|
|
pdata8bits = pData;
|
|
pdata16bits = NULL;
|
|
}
|
|
|
|
/* Initialize output number of received elements */
|
|
*RxLen = 0U;
|
|
|
|
/* as long as data have to be received */
|
|
while (huart->RxXferCount > 0U)
|
|
{
|
|
/* Check if IDLE flag is set */
|
|
if (__HAL_UART_GET_FLAG(huart, UART_FLAG_IDLE))
|
|
{
|
|
/* Clear IDLE flag in ISR */
|
|
__HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_IDLEF);
|
|
|
|
/* If Set, but no data ever received, clear flag without exiting loop */
|
|
/* If Set, and data has already been received, this means Idle Event is valid : End reception */
|
|
if (*RxLen > 0U)
|
|
{
|
|
huart->RxEventType = HAL_UART_RXEVENT_IDLE;
|
|
huart->RxState = HAL_UART_STATE_READY;
|
|
|
|
return HAL_OK;
|
|
}
|
|
}
|
|
|
|
/* Check if RXNE flag is set */
|
|
if (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE))
|
|
{
|
|
if (pdata8bits == NULL)
|
|
{
|
|
*pdata16bits = (uint16_t)(huart->Instance->RDR & uhMask);
|
|
pdata16bits++;
|
|
}
|
|
else
|
|
{
|
|
*pdata8bits = (uint8_t)(huart->Instance->RDR & (uint8_t)uhMask);
|
|
pdata8bits++;
|
|
}
|
|
/* Increment number of received elements */
|
|
*RxLen += 1U;
|
|
huart->RxXferCount--;
|
|
}
|
|
|
|
/* Check for the Timeout */
|
|
if (Timeout != HAL_MAX_DELAY)
|
|
{
|
|
if (((HAL_GetTick() - tickstart) > Timeout) || (Timeout == 0U))
|
|
{
|
|
huart->RxState = HAL_UART_STATE_READY;
|
|
|
|
return HAL_TIMEOUT;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Set number of received elements in output parameter : RxLen */
|
|
*RxLen = huart->RxXferSize - huart->RxXferCount;
|
|
/* At end of Rx process, restore huart->RxState to Ready */
|
|
huart->RxState = HAL_UART_STATE_READY;
|
|
|
|
return HAL_OK;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Receive an amount of data in interrupt mode till either the expected number of data
|
|
* is received or an IDLE event occurs.
|
|
* @note Reception is initiated by this function call. Further progress of reception is achieved thanks
|
|
* to UART interrupts raised by RXNE and IDLE events. Callback is called at end of reception indicating
|
|
* number of received data elements.
|
|
* @note When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
|
|
* the received data is handled as a set of uint16_t. In this case, Size must indicate the number
|
|
* of uint16_t available through pData.
|
|
* @param huart UART handle.
|
|
* @param pData Pointer to data buffer (uint8_t or uint16_t data elements).
|
|
* @param Size Amount of data elements (uint8_t or uint16_t) to be received.
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_UARTEx_ReceiveToIdle_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
|
|
{
|
|
HAL_StatusTypeDef status = HAL_OK;
|
|
|
|
/* Check that a Rx process is not already ongoing */
|
|
if (huart->RxState == HAL_UART_STATE_READY)
|
|
{
|
|
if ((pData == NULL) || (Size == 0U))
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Set Reception type to reception till IDLE Event*/
|
|
huart->ReceptionType = HAL_UART_RECEPTION_TOIDLE;
|
|
huart->RxEventType = HAL_UART_RXEVENT_TC;
|
|
|
|
(void)UART_Start_Receive_IT(huart, pData, Size);
|
|
|
|
if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
|
|
{
|
|
__HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_IDLEF);
|
|
ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
|
|
}
|
|
else
|
|
{
|
|
/* In case of errors already pending when reception is started,
|
|
Interrupts may have already been raised and lead to reception abortion.
|
|
(Overrun error for instance).
|
|
In such case Reception Type has been reset to HAL_UART_RECEPTION_STANDARD. */
|
|
status = HAL_ERROR;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Receive an amount of data in DMA mode till either the expected number
|
|
* of data is received or an IDLE event occurs.
|
|
* @note Reception is initiated by this function call. Further progress of reception is achieved thanks
|
|
* to DMA services, transferring automatically received data elements in user reception buffer and
|
|
* calling registered callbacks at half/end of reception. UART IDLE events are also used to consider
|
|
* reception phase as ended. In all cases, callback execution will indicate number of received data elements.
|
|
* @note When the UART parity is enabled (PCE = 1), the received data contain
|
|
* the parity bit (MSB position).
|
|
* @note When UART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),
|
|
* the received data is handled as a set of uint16_t. In this case, Size must indicate the number
|
|
* of uint16_t available through pData.
|
|
* @param huart UART handle.
|
|
* @param pData Pointer to data buffer (uint8_t or uint16_t data elements).
|
|
* @param Size Amount of data elements (uint8_t or uint16_t) to be received.
|
|
* @retval HAL status
|
|
*/
|
|
HAL_StatusTypeDef HAL_UARTEx_ReceiveToIdle_DMA(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
|
|
{
|
|
HAL_StatusTypeDef status;
|
|
|
|
/* Check that a Rx process is not already ongoing */
|
|
if (huart->RxState == HAL_UART_STATE_READY)
|
|
{
|
|
if ((pData == NULL) || (Size == 0U))
|
|
{
|
|
return HAL_ERROR;
|
|
}
|
|
|
|
/* Set Reception type to reception till IDLE Event*/
|
|
huart->ReceptionType = HAL_UART_RECEPTION_TOIDLE;
|
|
huart->RxEventType = HAL_UART_RXEVENT_TC;
|
|
|
|
status = UART_Start_Receive_DMA(huart, pData, Size);
|
|
|
|
/* Check Rx process has been successfully started */
|
|
if (status == HAL_OK)
|
|
{
|
|
if (huart->ReceptionType == HAL_UART_RECEPTION_TOIDLE)
|
|
{
|
|
__HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_IDLEF);
|
|
ATOMIC_SET_BIT(huart->Instance->CR1, USART_CR1_IDLEIE);
|
|
}
|
|
else
|
|
{
|
|
/* In case of errors already pending when reception is started,
|
|
Interrupts may have already been raised and lead to reception abortion.
|
|
(Overrun error for instance).
|
|
In such case Reception Type has been reset to HAL_UART_RECEPTION_STANDARD. */
|
|
status = HAL_ERROR;
|
|
}
|
|
}
|
|
|
|
return status;
|
|
}
|
|
else
|
|
{
|
|
return HAL_BUSY;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Provide Rx Event type that has lead to RxEvent callback execution.
|
|
* @note When HAL_UARTEx_ReceiveToIdle_IT() or HAL_UARTEx_ReceiveToIdle_DMA() API are called, progress
|
|
* of reception process is provided to application through calls of Rx Event callback (either default one
|
|
* HAL_UARTEx_RxEventCallback() or user registered one). As several types of events could occur (IDLE event,
|
|
* Half Transfer, or Transfer Complete), this function allows to retrieve the Rx Event type that has lead
|
|
* to Rx Event callback execution.
|
|
* @note This function is expected to be called within the user implementation of Rx Event Callback,
|
|
* in order to provide the accurate value :
|
|
* In Interrupt Mode :
|
|
* - HAL_UART_RXEVENT_TC : when Reception has been completed (expected nb of data has been received)
|
|
* - HAL_UART_RXEVENT_IDLE : when Idle event occurred prior reception has been completed (nb of
|
|
* received data is lower than expected one)
|
|
* In DMA Mode :
|
|
* - HAL_UART_RXEVENT_TC : when Reception has been completed (expected nb of data has been received)
|
|
* - HAL_UART_RXEVENT_HT : when half of expected nb of data has been received
|
|
* - HAL_UART_RXEVENT_IDLE : when Idle event occurred prior reception has been completed (nb of
|
|
* received data is lower than expected one).
|
|
* In DMA mode, RxEvent callback could be called several times;
|
|
* When DMA is configured in Normal Mode, HT event does not stop Reception process;
|
|
* When DMA is configured in Circular Mode, HT, TC or IDLE events don't stop Reception process;
|
|
* @param huart UART handle.
|
|
* @retval Rx Event Type (return vale will be a value of @ref UART_RxEvent_Type_Values)
|
|
*/
|
|
HAL_UART_RxEventTypeTypeDef HAL_UARTEx_GetRxEventType(const UART_HandleTypeDef *huart)
|
|
{
|
|
/* Return Rx Event type value, as stored in UART handle */
|
|
return (huart->RxEventType);
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/** @addtogroup UARTEx_Private_Functions
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief Initialize the UART wake-up from stop mode parameters when triggered by address detection.
|
|
* @param huart UART handle.
|
|
* @param WakeUpSelection UART wake up from stop mode parameters.
|
|
* @retval None
|
|
*/
|
|
static void UARTEx_Wakeup_AddressConfig(UART_HandleTypeDef *huart, UART_WakeUpTypeDef WakeUpSelection)
|
|
{
|
|
assert_param(IS_UART_ADDRESSLENGTH_DETECT(WakeUpSelection.AddressLength));
|
|
|
|
/* Set the USART address length */
|
|
MODIFY_REG(huart->Instance->CR2, USART_CR2_ADDM7, WakeUpSelection.AddressLength);
|
|
|
|
/* Set the USART address node */
|
|
MODIFY_REG(huart->Instance->CR2, USART_CR2_ADD, ((uint32_t)WakeUpSelection.Address << UART_CR2_ADDRESS_LSB_POS));
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif /* HAL_UART_MODULE_ENABLED */
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|