pub/halpp: l476rg/Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal

comparison l476rg/Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart.c @ 0:32a3b1785697

a rough draft of Hardware Abstraction Layer for C++ STM32L476RG drivers

author	cin
date	Thu, 12 Jan 2017 02:45:43 +0300
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+:32a3b1785697
+/**
+******************************************************************************
+* @file    stm32l4xx_hal_uart.c
+* @author  MCD Application Team
+* @version V1.6.0
+* @date    28-October-2016
+* @brief   UART HAL module driver.
+*          This file provides firmware functions to manage the following
+*          functionalities of the Universal Asynchronous Receiver Transmitter Peripheral (UART).
+*           + Initialization and de-initialization functions
+*           + IO operation functions
+*           + Peripheral Control functions
+*
+*
+@verbatim
+===============================================================================
+##### How to use this driver #####
+===============================================================================
+[..]
+The UART HAL driver can be used as follows:
+(#) Declare a UART_HandleTypeDef handle structure (eg. UART_HandleTypeDef huart).
+(#) Initialize the UART low level resources by implementing the HAL_UART_MspInit() API:
+(++) Enable the USARTx interface clock.
+(++) UART pins configuration:
+(+++) Enable the clock for the UART GPIOs.
+(+++) Configure these UART pins as alternate function pull-up.
+(++) NVIC configuration if you need to use interrupt process (HAL_UART_Transmit_IT()
+and HAL_UART_Receive_IT() APIs):
+(+++) Configure the USARTx interrupt priority.
+(+++) Enable the NVIC USART IRQ handle.
+(++) UART interrupts handling:
+-@@-  The specific UART interrupts (Transmission complete interrupt,
+RXNE interrupt and Error Interrupts) are managed using the macros
+__HAL_UART_ENABLE_IT() and __HAL_UART_DISABLE_IT() inside the transmit and receive processes.
+(++) DMA Configuration if you need to use DMA process (HAL_UART_Transmit_DMA()
+and HAL_UART_Receive_DMA() APIs):
+(+++) Declare a DMA handle structure for the Tx/Rx channel.
+(+++) Enable the DMAx interface clock.
+(+++) Configure the declared DMA handle structure with the required Tx/Rx parameters.
+(+++) Configure the DMA Tx/Rx channel.
+(+++) Associate the initialized DMA handle to the UART DMA Tx/Rx handle.
+(+++) Configure the priority and enable the NVIC for the transfer complete interrupt on the DMA Tx/Rx channel.
+(#) Program the Baud Rate, Word Length, Stop Bit, Parity, Hardware
+flow control and Mode (Receiver/Transmitter) in the huart handle Init structure.
+(#) If required, program UART advanced features (TX/RX pins swap, auto Baud rate detection,...)
+in the huart handle AdvancedInit structure.
+(#) For the UART asynchronous mode, initialize the UART registers by calling
+the HAL_UART_Init() API.
+(#) For the UART Half duplex mode, initialize the UART registers by calling
+the HAL_HalfDuplex_Init() API.
+(#) For the UART LIN (Local Interconnection Network) mode, initialize the UART registers
+by calling the HAL_LIN_Init() API.
+(#) For the UART Multiprocessor mode, initialize the UART registers
+by calling the HAL_MultiProcessor_Init() API.
+(#) For the UART RS485 Driver Enabled mode, initialize the UART registers
+by calling the HAL_RS485Ex_Init() API.
+[..]
+(@) These API's (HAL_UART_Init(), HAL_HalfDuplex_Init(), HAL_LIN_Init(), HAL_MultiProcessor_Init(),
+also configure the low level Hardware GPIO, CLOCK, CORTEX...etc) by
+calling the customized HAL_UART_MspInit() API.
+@endverbatim
+******************************************************************************
+* @attention
+*
+* <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
+*
+* Redistribution and use in source and binary forms, with or without modification,
+* are permitted provided that the following conditions are met:
+*   1. Redistributions of source code must retain the above copyright notice,
+*      this list of conditions and the following disclaimer.
+*   2. Redistributions in binary form must reproduce the above copyright notice,
+*      this list of conditions and the following disclaimer in the documentation
+*      and/or other materials provided with the distribution.
+*   3. Neither the name of STMicroelectronics nor the names of its contributors
+*      may be used to endorse or promote products derived from this software
+*      without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+*/
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l4xx_hal.h"
+/** @addtogroup STM32L4xx_HAL_Driver
+* @{
+*/
+/** @defgroup UART UART
+* @brief HAL UART module driver
+* @{
+*/
+#ifdef HAL_UART_MODULE_ENABLED
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/** @defgroup UART_Private_Constants UART Private Constants
+* @{
+*/
+#define UART_CR1_FIELDS  ((uint32_t)(USART_CR1_M | USART_CR1_PCE | USART_CR1_PS | \
+USART_CR1_TE | USART_CR1_RE | USART_CR1_OVER8)) /*!< UART or USART CR1 fields of parameters set by UART_SetConfig API */
+#define UART_LPUART_BRR_MIN           ((uint32_t)0x00000300)  /* LPUART BRR minimum authorized value */
+#define UART_LPUART_BRR_MAX           ((uint32_t)0x000FFFFF)  /* LPUART BRR maximum authorized value */
+/**
+* @}
+*/
+/* Private macros ------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/** @addtogroup UART_Private_Functions
+* @{
+*/
+static void UART_EndTxTransfer(UART_HandleTypeDef *huart);
+static void UART_EndRxTransfer(UART_HandleTypeDef *huart);
+static void UART_DMATransmitCplt(DMA_HandleTypeDef *hdma);
+static void UART_DMAReceiveCplt(DMA_HandleTypeDef *hdma);
+static void UART_DMARxHalfCplt(DMA_HandleTypeDef *hdma);
+static void UART_DMATxHalfCplt(DMA_HandleTypeDef *hdma);
+static void UART_DMAError(DMA_HandleTypeDef *hdma);
+static void UART_DMAAbortOnError(DMA_HandleTypeDef *hdma);
+static void UART_DMATxAbortCallback(DMA_HandleTypeDef *hdma);
+static void UART_DMARxAbortCallback(DMA_HandleTypeDef *hdma);
+static void UART_DMATxOnlyAbortCallback(DMA_HandleTypeDef *hdma);
+static void UART_DMARxOnlyAbortCallback(DMA_HandleTypeDef *hdma);
+static HAL_StatusTypeDef UART_Transmit_IT(UART_HandleTypeDef *huart);
+static HAL_StatusTypeDef UART_EndTransmit_IT(UART_HandleTypeDef *huart);
+static HAL_StatusTypeDef UART_Receive_IT(UART_HandleTypeDef *huart);
+/**
+* @}
+*/
+/* Exported functions --------------------------------------------------------*/
+/** @defgroup UART_Exported_Functions UART Exported Functions
+* @{
+*/
+/** @defgroup UART_Exported_Functions_Group1 Initialization and de-initialization functions
+*  @brief    Initialization and Configuration functions
+*
+@verbatim
+===============================================================================
+##### Initialization and Configuration functions #####
+===============================================================================
+[..]
+This subsection provides a set of functions allowing to initialize the USARTx or the UARTy
+in asynchronous mode.
+(+) For the asynchronous mode the parameters below can be configured:
+(++) Baud Rate
+(++) Word Length
+(++) Stop Bit
+(++) Parity: If the parity is enabled, then the MSB bit of the data written
+in the data register is transmitted but is changed by the parity bit.
+(++) Hardware flow control
+(++) Receiver/transmitter modes
+(++) Over Sampling Method
+(++) One-Bit Sampling Method
+(+) For the asynchronous mode, the following advanced features can be configured as well:
+(++) TX and/or RX pin level inversion
+(++) data logical level inversion
+(++) RX and TX pins swap
+(++) RX overrun detection disabling
+(++) DMA disabling on RX error
+(++) MSB first on communication line
+(++) auto Baud rate detection
+[..]
+The HAL_UART_Init(), HAL_HalfDuplex_Init(), HAL_LIN_Init()and HAL_MultiProcessor_Init()API
+follow respectively the UART asynchronous, UART Half duplex, UART LIN mode
+and UART multiprocessor mode configuration procedures (details for the procedures
+are available in reference manual).
+@endverbatim
+Depending on the frame length defined by the M1 and M0 bits (7-bit,
+8-bit or 9-bit), the possible UART formats are listed in the
+following table.
+Table 1. UART frame format.
++-----------------------------------------------------------------------+
+|  M1 bit |  M0 bit |  PCE bit  |             UART frame                |
+|---------|---------|-----------|---------------------------------------|
+|    0    |    0    |    0      |    | SB |    8 bit data   | STB |     |
+|---------|---------|-----------|---------------------------------------|
+|    0    |    0    |    1      |    | SB | 7 bit data | PB | STB |     |
+|---------|---------|-----------|---------------------------------------|
+|    0    |    1    |    0      |    | SB |    9 bit data   | STB |     |
+|---------|---------|-----------|---------------------------------------|
+|    0    |    1    |    1      |    | SB | 8 bit data | PB | STB |     |
+|---------|---------|-----------|---------------------------------------|
+|    1    |    0    |    0      |    | SB |    7 bit data   | STB |     |
+|---------|---------|-----------|---------------------------------------|
+|    1    |    0    |    1      |    | SB | 6 bit data | PB | STB |     |
++-----------------------------------------------------------------------+
+* @{
+*/
+/**
+* @brief Initialize the UART mode according to the specified
+*        parameters in the UART_InitTypeDef and initialize the associated handle.
+* @param huart: UART handle.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_Init(UART_HandleTypeDef *huart)
+{
+/* Check the UART handle allocation */
+if(huart == NULL)
+{
+return HAL_ERROR;
+}
+if(huart->Init.HwFlowCtl != UART_HWCONTROL_NONE)
+{
+/* Check the parameters */
+assert_param(IS_UART_HWFLOW_INSTANCE(huart->Instance));
+}
+else
+{
+/* Check the parameters */
+assert_param((IS_UART_INSTANCE(huart->Instance)) || (IS_LPUART_INSTANCE(huart->Instance)));
+}
+if(huart->gState == HAL_UART_STATE_RESET)
+{
+/* Allocate lock resource and initialize it */
+huart->Lock = HAL_UNLOCKED;
+/* Init the low level hardware : GPIO, CLOCK */
+HAL_UART_MspInit(huart);
+}
+huart->gState = HAL_UART_STATE_BUSY;
+/* Disable the Peripheral */
+__HAL_UART_DISABLE(huart);
+/* Set the UART Communication parameters */
+if (UART_SetConfig(huart) == HAL_ERROR)
+{
+return HAL_ERROR;
+}
+if (huart->AdvancedInit.AdvFeatureInit != UART_ADVFEATURE_NO_INIT)
+{
+UART_AdvFeatureConfig(huart);
+}
+/* In asynchronous mode, the following bits must be kept cleared:
+- LINEN and CLKEN bits in the USART_CR2 register,
+- SCEN, HDSEL and IREN  bits in the USART_CR3 register.*/
+CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
+CLEAR_BIT(huart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN));
+/* Enable the Peripheral */
+__HAL_UART_ENABLE(huart);
+/* TEACK and/or REACK to check before moving huart->gState and huart->RxState to Ready */
+return (UART_CheckIdleState(huart));
+}
+/**
+* @brief Initialize the half-duplex mode according to the specified
+*        parameters in the UART_InitTypeDef and creates the associated handle.
+* @param huart: UART handle.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_HalfDuplex_Init(UART_HandleTypeDef *huart)
+{
+/* Check the UART handle allocation */
+if(huart == NULL)
+{
+return HAL_ERROR;
+}
+/* Check UART instance */
+assert_param(IS_UART_HALFDUPLEX_INSTANCE(huart->Instance));
+if(huart->gState == HAL_UART_STATE_RESET)
+{
+/* Allocate lock resource and initialize it */
+huart->Lock = HAL_UNLOCKED;
+/* Init the low level hardware : GPIO, CLOCK */
+HAL_UART_MspInit(huart);
+}
+huart->gState = HAL_UART_STATE_BUSY;
+/* Disable the Peripheral */
+__HAL_UART_DISABLE(huart);
+/* Set the UART Communication parameters */
+if (UART_SetConfig(huart) == HAL_ERROR)
+{
+return HAL_ERROR;
+}
+if (huart->AdvancedInit.AdvFeatureInit != UART_ADVFEATURE_NO_INIT)
+{
+UART_AdvFeatureConfig(huart);
+}
+/* In half-duplex mode, the following bits must be kept cleared:
+- LINEN and CLKEN bits in the USART_CR2 register,
+- SCEN and IREN bits in the USART_CR3 register.*/
+CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
+CLEAR_BIT(huart->Instance->CR3, (USART_CR3_IREN | USART_CR3_SCEN));
+/* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */
+SET_BIT(huart->Instance->CR3, USART_CR3_HDSEL);
+/* Enable the Peripheral */
+__HAL_UART_ENABLE(huart);
+/* TEACK and/or REACK to check before moving huart->gState and huart->RxState to Ready */
+return (UART_CheckIdleState(huart));
+}
+/**
+* @brief Initialize the LIN mode according to the specified
+*        parameters in the UART_InitTypeDef and creates the associated handle .
+* @param huart: UART handle.
+* @param BreakDetectLength: specifies the LIN break detection length.
+*        This parameter can be one of the following values:
+*          @arg @ref UART_LINBREAKDETECTLENGTH_10B 10-bit break detection
+*          @arg @ref UART_LINBREAKDETECTLENGTH_11B 11-bit break detection
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_LIN_Init(UART_HandleTypeDef *huart, uint32_t BreakDetectLength)
+{
+/* Check the UART handle allocation */
+if(huart == NULL)
+{
+return HAL_ERROR;
+}
+/* Check the LIN UART instance */
+assert_param(IS_UART_LIN_INSTANCE(huart->Instance));
+/* Check the Break detection length parameter */
+assert_param(IS_UART_LIN_BREAK_DETECT_LENGTH(BreakDetectLength));
+/* LIN mode limited to 16-bit oversampling only */
+if(huart->Init.OverSampling == UART_OVERSAMPLING_8)
+{
+return HAL_ERROR;
+}
+/* LIN mode limited to 8-bit data length */
+if(huart->Init.WordLength != UART_WORDLENGTH_8B)
+{
+return HAL_ERROR;
+}
+if(huart->gState == HAL_UART_STATE_RESET)
+{
+/* Allocate lock resource and initialize it */
+huart->Lock = HAL_UNLOCKED;
+/* Init the low level hardware : GPIO, CLOCK */
+HAL_UART_MspInit(huart);
+}
+huart->gState = HAL_UART_STATE_BUSY;
+/* Disable the Peripheral */
+__HAL_UART_DISABLE(huart);
+/* Set the UART Communication parameters */
+if (UART_SetConfig(huart) == HAL_ERROR)
+{
+return HAL_ERROR;
+}
+if (huart->AdvancedInit.AdvFeatureInit != UART_ADVFEATURE_NO_INIT)
+{
+UART_AdvFeatureConfig(huart);
+}
+/* In LIN mode, the following bits must be kept cleared:
+- LINEN and CLKEN bits in the USART_CR2 register,
+- SCEN and IREN bits in the USART_CR3 register.*/
+CLEAR_BIT(huart->Instance->CR2, USART_CR2_CLKEN);
+CLEAR_BIT(huart->Instance->CR3, (USART_CR3_HDSEL | USART_CR3_IREN | USART_CR3_SCEN));
+/* Enable the LIN mode by setting the LINEN bit in the CR2 register */
+SET_BIT(huart->Instance->CR2, USART_CR2_LINEN);
+/* Set the USART LIN Break detection length. */
+MODIFY_REG(huart->Instance->CR2, USART_CR2_LBDL, BreakDetectLength);
+/* Enable the Peripheral */
+__HAL_UART_ENABLE(huart);
+/* TEACK and/or REACK to check before moving huart->gState and huart->RxState to Ready */
+return (UART_CheckIdleState(huart));
+}
+/**
+* @brief Initialize the multiprocessor mode according to the specified
+*        parameters in the UART_InitTypeDef and initialize the associated handle.
+* @param huart: UART handle.
+* @param Address: UART node address (4-, 6-, 7- or 8-bit long).
+* @param WakeUpMethod: specifies the UART wakeup method.
+*        This parameter can be one of the following values:
+*          @arg @ref UART_WAKEUPMETHOD_IDLELINE WakeUp by an idle line detection
+*          @arg @ref UART_WAKEUPMETHOD_ADDRESSMARK WakeUp by an address mark
+* @note  If the user resorts to idle line detection wake up, the Address parameter
+*        is useless and ignored by the initialization function.
+* @note  If the user resorts to address mark wake up, the address length detection
+*        is configured by default to 4 bits only. For the UART to be able to
+*        manage 6-, 7- or 8-bit long addresses detection, the API
+*        HAL_MultiProcessorEx_AddressLength_Set() must be called after
+*        HAL_MultiProcessor_Init().
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_MultiProcessor_Init(UART_HandleTypeDef *huart, uint8_t Address, uint32_t WakeUpMethod)
+{
+/* Check the UART handle allocation */
+if(huart == NULL)
+{
+return HAL_ERROR;
+}
+/* Check the wake up method parameter */
+assert_param(IS_UART_WAKEUPMETHOD(WakeUpMethod));
+if(huart->gState == HAL_UART_STATE_RESET)
+{
+/* Allocate lock resource and initialize it */
+huart->Lock = HAL_UNLOCKED;
+/* Init the low level hardware : GPIO, CLOCK */
+HAL_UART_MspInit(huart);
+}
+huart->gState = HAL_UART_STATE_BUSY;
+/* Disable the Peripheral */
+__HAL_UART_DISABLE(huart);
+/* Set the UART Communication parameters */
+if (UART_SetConfig(huart) == HAL_ERROR)
+{
+return HAL_ERROR;
+}
+if (huart->AdvancedInit.AdvFeatureInit != UART_ADVFEATURE_NO_INIT)
+{
+UART_AdvFeatureConfig(huart);
+}
+/* In multiprocessor mode, the following bits must be kept cleared:
+- LINEN and CLKEN bits in the USART_CR2 register,
+- SCEN, HDSEL and IREN  bits in the USART_CR3 register. */
+CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
+CLEAR_BIT(huart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN));
+if (WakeUpMethod == UART_WAKEUPMETHOD_ADDRESSMARK)
+{
+/* If address mark wake up method is chosen, set the USART address node */
+MODIFY_REG(huart->Instance->CR2, USART_CR2_ADD, ((uint32_t)Address << UART_CR2_ADDRESS_LSB_POS));
+}
+/* Set the wake up method by setting the WAKE bit in the CR1 register */
+MODIFY_REG(huart->Instance->CR1, USART_CR1_WAKE, WakeUpMethod);
+/* Enable the Peripheral */
+__HAL_UART_ENABLE(huart);
+/* TEACK and/or REACK to check before moving huart->gState and huart->RxState to Ready */
+return (UART_CheckIdleState(huart));
+}
+/**
+* @brief DeInitialize the UART peripheral.
+* @param huart: UART handle.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_DeInit(UART_HandleTypeDef *huart)
+{
+/* Check the UART handle allocation */
+if(huart == NULL)
+{
+return HAL_ERROR;
+}
+/* Check the parameters */
+assert_param((IS_UART_INSTANCE(huart->Instance)) || (IS_LPUART_INSTANCE(huart->Instance)));
+huart->gState = HAL_UART_STATE_BUSY;
+/* Disable the Peripheral */
+__HAL_UART_DISABLE(huart);
+huart->Instance->CR1 = 0x0;
+huart->Instance->CR2 = 0x0;
+huart->Instance->CR3 = 0x0;
+/* DeInit the low level hardware */
+HAL_UART_MspDeInit(huart);
+huart->ErrorCode = HAL_UART_ERROR_NONE;
+huart->gState    = HAL_UART_STATE_RESET;
+huart->RxState   = HAL_UART_STATE_RESET;
+/* Process Unlock */
+__HAL_UNLOCK(huart);
+return HAL_OK;
+}
+/**
+* @brief Initialize the UART MSP.
+* @param huart: UART handle.
+* @retval None
+*/
+__weak void HAL_UART_MspInit(UART_HandleTypeDef *huart)
+{
+/* Prevent unused argument(s) compilation warning */
+UNUSED(huart);
+/* NOTE : This function should not be modified, when the callback is needed,
+the HAL_UART_MspInit can be implemented in the user file
+*/
+}
+/**
+* @brief DeInitialize the UART MSP.
+* @param huart: UART handle.
+* @retval None
+*/
+__weak void HAL_UART_MspDeInit(UART_HandleTypeDef *huart)
+{
+/* Prevent unused argument(s) compilation warning */
+UNUSED(huart);
+/* NOTE : This function should not be modified, when the callback is needed,
+the HAL_UART_MspDeInit can be implemented in the user file
+*/
+}
+/**
+* @}
+*/
+/** @defgroup UART_Exported_Functions_Group2 IO operation functions
+* @brief UART Transmit/Receive functions
+*
+@verbatim
+===============================================================================
+##### IO operation functions #####
+===============================================================================
+This subsection provides a set of functions allowing to manage the UART asynchronous
+and Half duplex data transfers.
+(#) There are two mode of transfer:
+(+) Blocking mode: The communication is performed in polling mode.
+The HAL status of all data processing is returned by the same function
+after finishing transfer.
+(+) Non-Blocking mode: The communication is performed using Interrupts
+or DMA, These API's return the HAL status.
+The end of the data processing will be indicated through the
+dedicated UART IRQ when using Interrupt mode or the DMA IRQ when
+using DMA mode.
+The HAL_UART_TxCpltCallback(), HAL_UART_RxCpltCallback() user callbacks
+will be executed respectively at the end of the transmit or Receive process
+The HAL_UART_ErrorCallback()user callback will be executed when a communication error is detected
+(#) Blocking mode API's are :
+(+) HAL_UART_Transmit()
+(+) HAL_UART_Receive()
+(#) Non-Blocking mode API's with Interrupt are :
+(+) HAL_UART_Transmit_IT()
+(+) HAL_UART_Receive_IT()
+(+) HAL_UART_IRQHandler()
+(#) Non-Blocking mode API's with DMA are :
+(+) HAL_UART_Transmit_DMA()
+(+) HAL_UART_Receive_DMA()
+(+) HAL_UART_DMAPause()
+(+) HAL_UART_DMAResume()
+(+) HAL_UART_DMAStop()
+(#) A set of Transfer Complete Callbacks are provided in Non_Blocking mode:
+(+) HAL_UART_TxHalfCpltCallback()
+(+) HAL_UART_TxCpltCallback()
+(+) HAL_UART_RxHalfCpltCallback()
+(+) HAL_UART_RxCpltCallback()
+(+) HAL_UART_ErrorCallback()
+(#) Non-Blocking mode transfers could be aborted using Abort API's :
+(+) HAL_UART_Abort()
+(+) HAL_UART_AbortTransmit()
+(+) HAL_UART_AbortReceive()
+(+) HAL_UART_Abort_IT()
+(+) HAL_UART_AbortTransmit_IT()
+(+) HAL_UART_AbortReceive_IT()
+(#) For Abort services based on interrupts (HAL_UART_Abortxxx_IT), a set of Abort Complete Callbacks are provided:
+(+) HAL_UART_AbortCpltCallback()
+(+) HAL_UART_AbortTransmitCpltCallback()
+(+) HAL_UART_AbortReceiveCpltCallback()
+(#) In Non-Blocking mode transfers, possible errors are split into 2 categories.
+Errors are handled as follows :
+(+) Error is considered as Recoverable and non blocking : Transfer could go till end, but error severity is
+to be evaluated by user : this concerns Frame Error, Parity Error or Noise Error in Interrupt mode reception .
+Received character is then retrieved and stored in Rx buffer, Error code is set to allow user to identify error type,
+and HAL_UART_ErrorCallback() user callback is executed. Transfer is kept ongoing on UART side.
+If user wants to abort it, Abort services should be called by user.
+(+) Error is considered as Blocking : Transfer could not be completed properly and is aborted.
+This concerns Overrun Error In Interrupt mode reception and all errors in DMA mode.
+Error code is set to allow user to identify error type, and HAL_UART_ErrorCallback() user callback is executed.
+-@- In the Half duplex communication, it is forbidden to run the transmit
+and receive process in parallel, the UART state HAL_UART_STATE_BUSY_TX_RX can't be useful.
+@endverbatim
+* @{
+*/
+/**
+* @brief Send an amount of data in blocking mode.
+* @param huart: UART handle.
+* @param pData: Pointer to data buffer.
+* @param Size: Amount of data to be sent.
+* @param Timeout: Timeout duration.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout)
+{
+uint16_t* tmp;
+uint32_t tickstart = 0;
+/* Check that a Tx process is not already ongoing */
+if(huart->gState == HAL_UART_STATE_READY)
+{
+if((pData == NULL ) || (Size == 0))
+{
+return  HAL_ERROR;
+}
+/* Process Locked */
+__HAL_LOCK(huart);
+huart->ErrorCode = HAL_UART_ERROR_NONE;
+huart->gState = HAL_UART_STATE_BUSY_TX;
+/* Init tickstart for timeout managment*/
+tickstart = HAL_GetTick();
+huart->TxXferSize = Size;
+huart->TxXferCount = Size;
+while(huart->TxXferCount > 0)
+{
+huart->TxXferCount--;
+if(UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)
+{
+return HAL_TIMEOUT;
+}
+if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
+{
+tmp = (uint16_t*) pData;
+huart->Instance->TDR = (*tmp & (uint16_t)0x01FF);
+pData += 2;
+}
+else
+{
+huart->Instance->TDR = (*pData++ & (uint8_t)0xFF);
+}
+}
+if(UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_TC, RESET, tickstart, Timeout) != HAL_OK)
+{
+return HAL_TIMEOUT;
+}
+/* At end of Tx process, restore huart->gState to Ready */
+huart->gState = HAL_UART_STATE_READY;
+/* Process Unlocked */
+__HAL_UNLOCK(huart);
+return HAL_OK;
+}
+else
+{
+return HAL_BUSY;
+}
+}
+/**
+* @brief Receive an amount of data in blocking mode.
+* @param huart: UART handle.
+* @param pData: pointer to data buffer.
+* @param Size: amount of data to be received.
+* @param Timeout: Timeout duration.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_Receive(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout)
+{
+uint16_t* tmp;
+uint16_t uhMask;
+uint32_t tickstart = 0;
+/* Check that a Rx process is not already ongoing */
+if(huart->RxState == HAL_UART_STATE_READY)
+{
+if((pData == NULL ) || (Size == 0))
+{
+return  HAL_ERROR;
+}
+/* Process Locked */
+__HAL_LOCK(huart);
+huart->ErrorCode = HAL_UART_ERROR_NONE;
+huart->RxState = HAL_UART_STATE_BUSY_RX;
+/* Init tickstart for timeout managment*/
+tickstart = HAL_GetTick();
+huart->RxXferSize = Size;
+huart->RxXferCount = Size;
+/* Computation of UART mask to apply to RDR register */
+UART_MASK_COMPUTATION(huart);
+uhMask = huart->Mask;
+/* as long as data have to be received */
+while(huart->RxXferCount > 0)
+{
+huart->RxXferCount--;
+if(UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)
+{
+return HAL_TIMEOUT;
+}
+if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
+{
+tmp = (uint16_t*) pData ;
+*tmp = (uint16_t)(huart->Instance->RDR & uhMask);
+pData +=2;
+}
+else
+{
+*pData++ = (uint8_t)(huart->Instance->RDR & (uint8_t)uhMask);
+}
+}
+/* At end of Rx process, restore huart->RxState to Ready */
+huart->RxState = HAL_UART_STATE_READY;
+/* Process Unlocked */
+__HAL_UNLOCK(huart);
+return HAL_OK;
+}
+else
+{
+return HAL_BUSY;
+}
+}
+/**
+* @brief Send an amount of data in interrupt mode.
+* @param huart: UART handle.
+* @param pData: pointer to data buffer.
+* @param Size: amount of data to be sent.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_Transmit_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
+{
+/* Check that a Tx process is not already ongoing */
+if(huart->gState == HAL_UART_STATE_READY)
+{
+if((pData == NULL ) || (Size == 0))
+{
+return HAL_ERROR;
+}
+/* Process Locked */
+__HAL_LOCK(huart);
+huart->pTxBuffPtr = pData;
+huart->TxXferSize = Size;
+huart->TxXferCount = Size;
+huart->ErrorCode = HAL_UART_ERROR_NONE;
+huart->gState = HAL_UART_STATE_BUSY_TX;
+/* Process Unlocked */
+__HAL_UNLOCK(huart);
+/* Enable the UART Transmit Data Register Empty Interrupt */
+SET_BIT(huart->Instance->CR1, USART_CR1_TXEIE);
+return HAL_OK;
+}
+else
+{
+return HAL_BUSY;
+}
+}
+/**
+* @brief Receive an amount of data in interrupt mode.
+* @param huart: UART handle.
+* @param pData: pointer to data buffer.
+* @param Size: amount of data to be received.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_Receive_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
+{
+/* Check that a Rx process is not already ongoing */
+if(huart->RxState == HAL_UART_STATE_READY)
+{
+if((pData == NULL ) || (Size == 0))
+{
+return HAL_ERROR;
+}
+/* Process Locked */
+__HAL_LOCK(huart);
+huart->pRxBuffPtr = pData;
+huart->RxXferSize = Size;
+huart->RxXferCount = Size;
+/* Computation of UART mask to apply to RDR register */
+UART_MASK_COMPUTATION(huart);
+huart->ErrorCode = HAL_UART_ERROR_NONE;
+huart->RxState = HAL_UART_STATE_BUSY_RX;
+/* Process Unlocked */
+__HAL_UNLOCK(huart);
+/* Enable the UART Error Interrupt: (Frame error, noise error, overrun error) */
+SET_BIT(huart->Instance->CR3, USART_CR3_EIE);
+/* Enable the UART Parity Error and Data Register not empty Interrupts */
+SET_BIT(huart->Instance->CR1, USART_CR1_PEIE | USART_CR1_RXNEIE);
+return HAL_OK;
+}
+else
+{
+return HAL_BUSY;
+}
+}
+/**
+* @brief Send an amount of data in DMA mode.
+* @param huart: UART handle.
+* @param pData: pointer to data buffer.
+* @param Size: amount of data to be sent.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_Transmit_DMA(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
+{
+/* Check that a Tx process is not already ongoing */
+if(huart->gState == HAL_UART_STATE_READY)
+{
+if((pData == NULL ) || (Size == 0))
+{
+return HAL_ERROR;
+}
+/* Process Locked */
+__HAL_LOCK(huart);
+huart->pTxBuffPtr = pData;
+huart->TxXferSize = Size;
+huart->TxXferCount = Size;
+huart->ErrorCode = HAL_UART_ERROR_NONE;
+huart->gState = HAL_UART_STATE_BUSY_TX;
+/* Set the UART DMA transfer complete callback */
+huart->hdmatx->XferCpltCallback = UART_DMATransmitCplt;
+/* Set the UART DMA Half transfer complete callback */
+huart->hdmatx->XferHalfCpltCallback = UART_DMATxHalfCplt;
+/* Set the DMA error callback */
+huart->hdmatx->XferErrorCallback = UART_DMAError;
+/* Set the DMA abort callback */
+huart->hdmatx->XferAbortCallback = NULL;
+/* Enable the UART transmit DMA channel */
+HAL_DMA_Start_IT(huart->hdmatx, (uint32_t)huart->pTxBuffPtr, (uint32_t)&huart->Instance->TDR, Size);
+/* Clear the TC flag in the ICR register */
+__HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_TCF);
+/* Process Unlocked */
+__HAL_UNLOCK(huart);
+/* Enable the DMA transfer for transmit request by setting the DMAT bit
+in the UART CR3 register */
+SET_BIT(huart->Instance->CR3, USART_CR3_DMAT);
+return HAL_OK;
+}
+else
+{
+return HAL_BUSY;
+}
+}
+/**
+* @brief Receive an amount of data in DMA mode.
+* @param huart: UART handle.
+* @param pData: pointer to data buffer.
+* @param Size: amount of data to be received.
+* @note   When the UART parity is enabled (PCE = 1), the received data contain
+*         the parity bit (MSB position).
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_Receive_DMA(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
+{
+/* Check that a Rx process is not already ongoing */
+if(huart->RxState == HAL_UART_STATE_READY)
+{
+if((pData == NULL ) || (Size == 0))
+{
+return HAL_ERROR;
+}
+/* Process Locked */
+__HAL_LOCK(huart);
+huart->pRxBuffPtr = pData;
+huart->RxXferSize = Size;
+huart->ErrorCode = HAL_UART_ERROR_NONE;
+huart->RxState = HAL_UART_STATE_BUSY_RX;
+/* Set the UART DMA transfer complete callback */
+huart->hdmarx->XferCpltCallback = UART_DMAReceiveCplt;
+/* Set the UART DMA Half transfer complete callback */
+huart->hdmarx->XferHalfCpltCallback = UART_DMARxHalfCplt;
+/* Set the DMA error callback */
+huart->hdmarx->XferErrorCallback = UART_DMAError;
+/* Set the DMA abort callback */
+huart->hdmarx->XferAbortCallback = NULL;
+/* Enable the DMA channel */
+HAL_DMA_Start_IT(huart->hdmarx, (uint32_t)&huart->Instance->RDR, (uint32_t)huart->pRxBuffPtr, Size);
+/* Process Unlocked */
+__HAL_UNLOCK(huart);
+/* Enable the UART Parity Error Interrupt */
+SET_BIT(huart->Instance->CR1, USART_CR1_PEIE);
+/* Enable the UART Error Interrupt: (Frame error, noise error, overrun error) */
+SET_BIT(huart->Instance->CR3, USART_CR3_EIE);
+/* Enable the DMA transfer for the receiver request by setting the DMAR bit
+in the UART CR3 register */
+SET_BIT(huart->Instance->CR3, USART_CR3_DMAR);
+return HAL_OK;
+}
+else
+{
+return HAL_BUSY;
+}
+}
+/**
+* @brief Pause the DMA Transfer.
+* @param huart: UART handle.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_DMAPause(UART_HandleTypeDef *huart)
+{
+/* Process Locked */
+__HAL_LOCK(huart);
+if ((huart->gState == HAL_UART_STATE_BUSY_TX) &&
+(HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT)))
+{
+/* Disable the UART DMA Tx request */
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
+}
+if ((huart->RxState == HAL_UART_STATE_BUSY_RX) &&
+(HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR)))
+{
+/* Disable PE and ERR (Frame error, noise error, overrun error) interrupts */
+CLEAR_BIT(huart->Instance->CR1, USART_CR1_PEIE);
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
+/* Disable the UART DMA Rx request */
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
+}
+/* Process Unlocked */
+__HAL_UNLOCK(huart);
+return HAL_OK;
+}
+/**
+* @brief Resume the DMA Transfer.
+* @param huart: UART handle.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_DMAResume(UART_HandleTypeDef *huart)
+{
+/* Process Locked */
+__HAL_LOCK(huart);
+if(huart->gState == HAL_UART_STATE_BUSY_TX)
+{
+/* Enable the UART DMA Tx request */
+SET_BIT(huart->Instance->CR3, USART_CR3_DMAT);
+}
+if(huart->RxState == HAL_UART_STATE_BUSY_RX)
+{
+/* Clear the Overrun flag before resuming the Rx transfer */
+__HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF);
+/* Reenable PE and ERR (Frame error, noise error, overrun error) interrupts */
+SET_BIT(huart->Instance->CR1, USART_CR1_PEIE);
+SET_BIT(huart->Instance->CR3, USART_CR3_EIE);
+/* Enable the UART DMA Rx request */
+SET_BIT(huart->Instance->CR3, USART_CR3_DMAR);
+}
+/* Process Unlocked */
+__HAL_UNLOCK(huart);
+return HAL_OK;
+}
+/**
+* @brief Stop the DMA Transfer.
+* @param huart: UART handle.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_DMAStop(UART_HandleTypeDef *huart)
+{
+/* The Lock is not implemented on this API to allow the user application
+to call the HAL UART API under callbacks HAL_UART_TxCpltCallback() / HAL_UART_RxCpltCallback() /
+HAL_UART_TxHalfCpltCallback / HAL_UART_RxHalfCpltCallback:
+indeed, when HAL_DMA_Abort() API is called, the DMA TX/RX Transfer or Half Transfer complete
+interrupt is generated if the DMA transfer interruption occurs at the middle or at the end of
+the stream and the corresponding call back is executed. */
+/* Stop UART DMA Tx request if ongoing */
+if ((huart->gState == HAL_UART_STATE_BUSY_TX) &&
+(HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT)))
+{
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
+/* Abort the UART DMA Tx channel */
+if(huart->hdmatx != NULL)
+{
+HAL_DMA_Abort(huart->hdmatx);
+}
+UART_EndTxTransfer(huart);
+}
+/* Stop UART DMA Rx request if ongoing */
+if ((huart->RxState == HAL_UART_STATE_BUSY_RX) &&
+(HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR)))
+{
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
+/* Abort the UART DMA Rx channel */
+if(huart->hdmarx != NULL)
+{
+HAL_DMA_Abort(huart->hdmarx);
+}
+UART_EndRxTransfer(huart);
+}
+return HAL_OK;
+}
+/**
+* @brief  Abort ongoing transfers (blocking mode).
+* @param  huart UART handle.
+* @note   This procedure could be used for aborting any ongoing transfer started in Interrupt or DMA mode.
+*         This procedure performs following operations :
+*           - Disable UART Interrupts (Tx and Rx)
+*           - Disable the DMA transfer in the peripheral register (if enabled)
+*           - Abort DMA transfer by calling HAL_DMA_Abort (in case of transfer in DMA mode)
+*           - Set handle State to READY
+* @note   This procedure is executed in blocking mode : when exiting function, Abort is considered as completed.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_Abort(UART_HandleTypeDef *huart)
+{
+/* Disable TXEIE, TCIE, RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
+CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE | USART_CR1_TCIE));
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
+/* Disable the UART DMA Tx request if enabled */
+if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT))
+{
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
+/* Abort the UART DMA Tx channel : use blocking DMA Abort API (no callback) */
+if(huart->hdmatx != NULL)
+{
+/* Set the UART DMA Abort callback to Null.
+No call back execution at end of DMA abort procedure */
+huart->hdmatx->XferAbortCallback = NULL;
+HAL_DMA_Abort(huart->hdmatx);
+}
+}
+/* Disable the UART DMA Rx request if enabled */
+if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
+{
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
+/* Abort the UART DMA Rx channel : use blocking DMA Abort API (no callback) */
+if(huart->hdmarx != NULL)
+{
+/* Set the UART DMA Abort callback to Null.
+No call back execution at end of DMA abort procedure */
+huart->hdmarx->XferAbortCallback = NULL;
+HAL_DMA_Abort(huart->hdmarx);
+}
+}
+/* Reset Tx and Rx transfer counters */
+huart->TxXferCount = 0;
+huart->RxXferCount = 0;
+/* Clear the Error flags in the ICR register */
+__HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF | UART_CLEAR_NEF | UART_CLEAR_PEF | UART_CLEAR_FEF);
+/* Restore huart->gState and huart->RxState to Ready */
+huart->gState  = HAL_UART_STATE_READY;
+huart->RxState = HAL_UART_STATE_READY;
+/* Reset Handle ErrorCode to No Error */
+huart->ErrorCode = HAL_UART_ERROR_NONE;
+return HAL_OK;
+}
+/**
+* @brief  Abort ongoing Transmit transfer (blocking mode).
+* @param  huart UART handle.
+* @note   This procedure could be used for aborting any ongoing Tx transfer started in Interrupt or DMA mode.
+*         This procedure performs following operations :
+*           - Disable UART Interrupts (Tx)
+*           - Disable the DMA transfer in the peripheral register (if enabled)
+*           - Abort DMA transfer by calling HAL_DMA_Abort (in case of transfer in DMA mode)
+*           - Set handle State to READY
+* @note   This procedure is executed in blocking mode : when exiting function, Abort is considered as completed.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_AbortTransmit(UART_HandleTypeDef *huart)
+{
+/* Disable TXEIE and TCIE interrupts */
+CLEAR_BIT(huart->Instance->CR1, (USART_CR1_TXEIE | USART_CR1_TCIE));
+/* Disable the UART DMA Tx request if enabled */
+if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT))
+{
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
+/* Abort the UART DMA Tx channel : use blocking DMA Abort API (no callback) */
+if(huart->hdmatx != NULL)
+{
+/* Set the UART DMA Abort callback to Null.
+No call back execution at end of DMA abort procedure */
+huart->hdmatx->XferAbortCallback = NULL;
+HAL_DMA_Abort(huart->hdmatx);
+}
+}
+/* Reset Tx transfer counter */
+huart->TxXferCount = 0;
+/* Restore huart->gState to Ready */
+huart->gState = HAL_UART_STATE_READY;
+return HAL_OK;
+}
+/**
+* @brief  Abort ongoing Receive transfer (blocking mode).
+* @param  huart UART handle.
+* @note   This procedure could be used for aborting any ongoing Rx transfer started in Interrupt or DMA mode.
+*         This procedure performs following operations :
+*           - Disable UART Interrupts (Rx)
+*           - Disable the DMA transfer in the peripheral register (if enabled)
+*           - Abort DMA transfer by calling HAL_DMA_Abort (in case of transfer in DMA mode)
+*           - Set handle State to READY
+* @note   This procedure is executed in blocking mode : when exiting function, Abort is considered as completed.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_AbortReceive(UART_HandleTypeDef *huart)
+{
+/* Disable RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
+CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
+/* Disable the UART DMA Rx request if enabled */
+if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
+{
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
+/* Abort the UART DMA Rx channel : use blocking DMA Abort API (no callback) */
+if(huart->hdmarx != NULL)
+{
+/* Set the UART DMA Abort callback to Null.
+No call back execution at end of DMA abort procedure */
+huart->hdmarx->XferAbortCallback = NULL;
+HAL_DMA_Abort(huart->hdmarx);
+}
+}
+/* Reset Rx transfer counter */
+huart->RxXferCount = 0;
+/* Clear the Error flags in the ICR register */
+__HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF | UART_CLEAR_NEF | UART_CLEAR_PEF | UART_CLEAR_FEF);
+/* Restore huart->RxState to Ready */
+huart->RxState = HAL_UART_STATE_READY;
+return HAL_OK;
+}
+/**
+* @brief  Abort ongoing transfers (Interrupt mode).
+* @param  huart UART handle.
+* @note   This procedure could be used for aborting any ongoing transfer started in Interrupt or DMA mode.
+*         This procedure performs following operations :
+*           - Disable UART Interrupts (Tx and Rx)
+*           - Disable the DMA transfer in the peripheral register (if enabled)
+*           - Abort DMA transfer by calling HAL_DMA_Abort_IT (in case of transfer in DMA mode)
+*           - Set handle State to READY
+*           - At abort completion, call user abort complete callback
+* @note   This procedure is executed in Interrupt mode, meaning that abort procedure could be
+*         considered as completed only when user abort complete callback is executed (not when exiting function).
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_Abort_IT(UART_HandleTypeDef *huart)
+{
+uint32_t abortcplt = 1;
+/* Disable TXEIE, TCIE, RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
+CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE | USART_CR1_TCIE));
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
+/* If DMA Tx and/or DMA Rx Handles are associated to UART Handle, DMA Abort complete callbacks should be initialised
+before any call to DMA Abort functions */
+/* DMA Tx Handle is valid */
+if(huart->hdmatx != NULL)
+{
+/* Set DMA Abort Complete callback if UART DMA Tx request if enabled.
+Otherwise, set it to NULL */
+if(HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT))
+{
+huart->hdmatx->XferAbortCallback = UART_DMATxAbortCallback;
+}
+else
+{
+huart->hdmatx->XferAbortCallback = NULL;
+}
+}
+/* DMA Rx Handle is valid */
+if(huart->hdmarx != NULL)
+{
+/* Set DMA Abort Complete callback if UART DMA Rx request if enabled.
+Otherwise, set it to NULL */
+if(HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
+{
+huart->hdmarx->XferAbortCallback = UART_DMARxAbortCallback;
+}
+else
+{
+huart->hdmarx->XferAbortCallback = NULL;
+}
+}
+/* Disable the UART DMA Tx request if enabled */
+if(HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT))
+{
+/* Disable DMA Tx at UART level */
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
+/* Abort the UART DMA Tx channel : use non blocking DMA Abort API (callback) */
+if(huart->hdmatx != NULL)
+{
+/* UART Tx DMA Abort callback has already been initialised :
+will lead to call HAL_UART_AbortCpltCallback() at end of DMA abort procedure */
+/* Abort DMA TX */
+if(HAL_DMA_Abort_IT(huart->hdmatx) != HAL_OK)
+{
+huart->hdmatx->XferAbortCallback = NULL;
+}
+else
+{
+abortcplt = 0;
+}
+}
+}
+/* Disable the UART DMA Rx request if enabled */
+if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
+{
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
+/* Abort the UART DMA Rx channel : use non blocking DMA Abort API (callback) */
+if(huart->hdmarx != NULL)
+{
+/* UART Rx DMA Abort callback has already been initialised :
+will lead to call HAL_UART_AbortCpltCallback() at end of DMA abort procedure */
+/* Abort DMA RX */
+if(HAL_DMA_Abort_IT(huart->hdmarx) != HAL_OK)
+{
+huart->hdmarx->XferAbortCallback = NULL;
+abortcplt = 1;
+}
+else
+{
+abortcplt = 0;
+}
+}
+}
+/* if no DMA abort complete callback execution is required => call user Abort Complete callback */
+if (abortcplt == 1)
+{
+/* Reset Tx and Rx transfer counters */
+huart->TxXferCount = 0;
+huart->RxXferCount = 0;
+/* Reset errorCode */
+huart->ErrorCode = HAL_UART_ERROR_NONE;
+/* Clear the Error flags in the ICR register */
+__HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF | UART_CLEAR_NEF | UART_CLEAR_PEF | UART_CLEAR_FEF);
+/* Restore huart->gState and huart->RxState to Ready */
+huart->gState  = HAL_UART_STATE_READY;
+huart->RxState = HAL_UART_STATE_READY;
+/* As no DMA to be aborted, call directly user Abort complete callback */
+HAL_UART_AbortCpltCallback(huart);
+}
+return HAL_OK;
+}
+/**
+* @brief  Abort ongoing Transmit transfer (Interrupt mode).
+* @param  huart UART handle.
+* @note   This procedure could be used for aborting any ongoing Tx transfer started in Interrupt or DMA mode.
+*         This procedure performs following operations :
+*           - Disable UART Interrupts (Tx)
+*           - Disable the DMA transfer in the peripheral register (if enabled)
+*           - Abort DMA transfer by calling HAL_DMA_Abort_IT (in case of transfer in DMA mode)
+*           - Set handle State to READY
+*           - At abort completion, call user abort complete callback
+* @note   This procedure is executed in Interrupt mode, meaning that abort procedure could be
+*         considered as completed only when user abort complete callback is executed (not when exiting function).
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_AbortTransmit_IT(UART_HandleTypeDef *huart)
+{
+/* Disable TXEIE and TCIE interrupts */
+CLEAR_BIT(huart->Instance->CR1, (USART_CR1_TXEIE | USART_CR1_TCIE));
+/* Disable the UART DMA Tx request if enabled */
+if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT))
+{
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
+/* Abort the UART DMA Tx channel : use non blocking DMA Abort API (callback) */
+if(huart->hdmatx != NULL)
+{
+/* Set the UART DMA Abort callback :
+will lead to call HAL_UART_AbortCpltCallback() at end of DMA abort procedure */
+huart->hdmatx->XferAbortCallback = UART_DMATxOnlyAbortCallback;
+/* Abort DMA TX */
+if(HAL_DMA_Abort_IT(huart->hdmatx) != HAL_OK)
+{
+/* Call Directly huart->hdmatx->XferAbortCallback function in case of error */
+huart->hdmatx->XferAbortCallback(huart->hdmatx);
+}
+}
+else
+{
+/* Reset Tx transfer counter */
+huart->TxXferCount = 0;
+/* Restore huart->gState to Ready */
+huart->gState = HAL_UART_STATE_READY;
+/* As no DMA to be aborted, call directly user Abort complete callback */
+HAL_UART_AbortTransmitCpltCallback(huart);
+}
+}
+else
+{
+/* Reset Tx transfer counter */
+huart->TxXferCount = 0;
+/* Restore huart->gState to Ready */
+huart->gState = HAL_UART_STATE_READY;
+/* As no DMA to be aborted, call directly user Abort complete callback */
+HAL_UART_AbortTransmitCpltCallback(huart);
+}
+return HAL_OK;
+}
+/**
+* @brief  Abort ongoing Receive transfer (Interrupt mode).
+* @param  huart UART handle.
+* @note   This procedure could be used for aborting any ongoing Rx transfer started in Interrupt or DMA mode.
+*         This procedure performs following operations :
+*           - Disable UART Interrupts (Rx)
+*           - Disable the DMA transfer in the peripheral register (if enabled)
+*           - Abort DMA transfer by calling HAL_DMA_Abort_IT (in case of transfer in DMA mode)
+*           - Set handle State to READY
+*           - At abort completion, call user abort complete callback
+* @note   This procedure is executed in Interrupt mode, meaning that abort procedure could be
+*         considered as completed only when user abort complete callback is executed (not when exiting function).
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_UART_AbortReceive_IT(UART_HandleTypeDef *huart)
+{
+/* Disable RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
+CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
+/* Disable the UART DMA Rx request if enabled */
+if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
+{
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
+/* Abort the UART DMA Rx channel : use non blocking DMA Abort API (callback) */
+if(huart->hdmarx != NULL)
+{
+/* Set the UART DMA Abort callback :
+will lead to call HAL_UART_AbortCpltCallback() at end of DMA abort procedure */
+huart->hdmarx->XferAbortCallback = UART_DMARxOnlyAbortCallback;
+/* Abort DMA RX */
+if(HAL_DMA_Abort_IT(huart->hdmarx) != HAL_OK)
+{
+/* Call Directly huart->hdmarx->XferAbortCallback function in case of error */
+huart->hdmarx->XferAbortCallback(huart->hdmarx);
+}
+}
+else
+{
+/* Reset Rx transfer counter */
+huart->RxXferCount = 0;
+/* Clear the Error flags in the ICR register */
+__HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF | UART_CLEAR_NEF | UART_CLEAR_PEF | UART_CLEAR_FEF);
+/* Restore huart->RxState to Ready */
+huart->RxState = HAL_UART_STATE_READY;
+/* As no DMA to be aborted, call directly user Abort complete callback */
+HAL_UART_AbortReceiveCpltCallback(huart);
+}
+}
+else
+{
+/* Reset Rx transfer counter */
+huart->RxXferCount = 0;
+/* Clear the Error flags in the ICR register */
+__HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF | UART_CLEAR_NEF | UART_CLEAR_PEF | UART_CLEAR_FEF);
+/* Restore huart->RxState to Ready */
+huart->RxState = HAL_UART_STATE_READY;
+/* As no DMA to be aborted, call directly user Abort complete callback */
+HAL_UART_AbortReceiveCpltCallback(huart);
+}
+return HAL_OK;
+}
+/**
+* @brief Handle UART interrupt request.
+* @param huart: UART handle.
+* @retval None
+*/
+void HAL_UART_IRQHandler(UART_HandleTypeDef *huart)
+{
+uint32_t isrflags   = READ_REG(huart->Instance->ISR);
+uint32_t cr1its     = READ_REG(huart->Instance->CR1);
+uint32_t cr3its;
+uint32_t errorflags;
+/* If no error occurs */
+errorflags = (isrflags & (uint32_t)(USART_ISR_PE | USART_ISR_FE | USART_ISR_ORE | USART_ISR_NE));
+if (errorflags == RESET)
+{
+/* UART in mode Receiver ---------------------------------------------------*/
+if(((isrflags & USART_ISR_RXNE) != RESET) && ((cr1its & USART_CR1_RXNEIE) != RESET))
+{
+UART_Receive_IT(huart);
+return;
+}
+}
+/* If some errors occur */
+cr3its = READ_REG(huart->Instance->CR3);
+if(   (errorflags != RESET)
+&& (   ((cr3its & USART_CR3_EIE) != RESET)
+|| ((cr1its & (USART_CR1_RXNEIE | USART_CR1_PEIE)) != RESET)) )
+{
+/* UART parity error interrupt occurred -------------------------------------*/
+if(((isrflags & USART_ISR_PE) != RESET) && ((cr1its & USART_CR1_PEIE) != RESET))
+{
+__HAL_UART_CLEAR_IT(huart, UART_CLEAR_PEF);
+huart->ErrorCode |= HAL_UART_ERROR_PE;
+}
+/* UART frame error interrupt occurred --------------------------------------*/
+if(((isrflags & USART_ISR_FE) != RESET) && ((cr3its & USART_CR3_EIE) != RESET))
+{
+__HAL_UART_CLEAR_IT(huart, UART_CLEAR_FEF);
+huart->ErrorCode |= HAL_UART_ERROR_FE;
+}
+/* UART noise error interrupt occurred --------------------------------------*/
+if(((isrflags & USART_ISR_NE) != RESET) && ((cr3its & USART_CR3_EIE) != RESET))
+{
+__HAL_UART_CLEAR_IT(huart, UART_CLEAR_NEF);
+huart->ErrorCode |= HAL_UART_ERROR_NE;
+}
+/* UART Over-Run interrupt occurred -----------------------------------------*/
+if(((isrflags & USART_ISR_ORE) != RESET) &&
+(((cr1its & USART_CR1_RXNEIE) != RESET) || ((cr3its & USART_CR3_EIE) != RESET)))
+{
+__HAL_UART_CLEAR_IT(huart, UART_CLEAR_OREF);
+huart->ErrorCode |= HAL_UART_ERROR_ORE;
+}
+/* Call UART Error Call back function if need be --------------------------*/
+if(huart->ErrorCode != HAL_UART_ERROR_NONE)
+{
+/* UART in mode Receiver ---------------------------------------------------*/
+if(((isrflags & USART_ISR_RXNE) != RESET) && ((cr1its & USART_CR1_RXNEIE) != RESET))
+{
+UART_Receive_IT(huart);
+}
+/* If Overrun error occurs, or if any error occurs in DMA mode reception,
+consider error as blocking */
+if (((huart->ErrorCode & HAL_UART_ERROR_ORE) != RESET) ||
+(HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR)))
+{
+/* Blocking error : transfer is aborted
+Set the UART state ready to be able to start again the process,
+Disable Rx Interrupts, and disable Rx DMA request, if ongoing */
+UART_EndRxTransfer(huart);
+/* Disable the UART DMA Rx request if enabled */
+if (HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR))
+{
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
+/* Abort the UART DMA Rx channel */
+if(huart->hdmarx != NULL)
+{
+/* Set the UART DMA Abort callback :
+will lead to call HAL_UART_ErrorCallback() at end of DMA abort procedure */
+huart->hdmarx->XferAbortCallback = UART_DMAAbortOnError;
+/* Abort DMA RX */
+if(HAL_DMA_Abort_IT(huart->hdmarx) != HAL_OK)
+{
+/* Call Directly huart->hdmarx->XferAbortCallback function in case of error */
+huart->hdmarx->XferAbortCallback(huart->hdmarx);
+}
+}
+else
+{
+/* Call user error callback */
+HAL_UART_ErrorCallback(huart);
+}
+}
+else
+{
+/* Call user error callback */
+HAL_UART_ErrorCallback(huart);
+}
+}
+else
+{
+/* Non Blocking error : transfer could go on.
+Error is notified to user through user error callback */
+HAL_UART_ErrorCallback(huart);
+huart->ErrorCode = HAL_UART_ERROR_NONE;
+}
+}
+return;
+} /* End if some error occurs */
+/* UART wakeup from Stop mode interrupt occurred ---------------------------*/
+cr3its = READ_REG(huart->Instance->CR3);
+if(((isrflags & USART_ISR_WUF) != RESET) && ((cr3its & USART_CR3_WUFIE) != RESET))
+{
+__HAL_UART_CLEAR_IT(huart, UART_CLEAR_WUF);
+/* Set the UART state ready to be able to start again the process */
+huart->gState  = HAL_UART_STATE_READY;
+huart->RxState = HAL_UART_STATE_READY;
+HAL_UARTEx_WakeupCallback(huart);
+return;
+}
+/* UART in mode Transmitter ------------------------------------------------*/
+if(((isrflags & USART_ISR_TXE) != RESET) && ((cr1its & USART_CR1_TXEIE) != RESET))
+{
+UART_Transmit_IT(huart);
+return;
+}
+/* UART in mode Transmitter (transmission end) -----------------------------*/
+if(((isrflags & USART_ISR_TC) != RESET) && ((cr1its & USART_CR1_TCIE) != RESET))
+{
+UART_EndTransmit_IT(huart);
+return;
+}
+}
+/**
+* @brief Tx Transfer completed callback.
+* @param huart: UART handle.
+* @retval None
+*/
+__weak void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
+{
+/* Prevent unused argument(s) compilation warning */
+UNUSED(huart);
+/* NOTE : This function should not be modified, when the callback is needed,
+the HAL_UART_TxCpltCallback can be implemented in the user file.
+*/
+}
+/**
+* @brief  Tx Half Transfer completed callback.
+* @param  huart: UART handle.
+* @retval None
+*/
+__weak void HAL_UART_TxHalfCpltCallback(UART_HandleTypeDef *huart)
+{
+/* Prevent unused argument(s) compilation warning */
+UNUSED(huart);
+/* NOTE: This function should not be modified, when the callback is needed,
+the HAL_UART_TxHalfCpltCallback can be implemented in the user file.
+*/
+}
+/**
+* @brief Rx Transfer completed callback.
+* @param huart: UART handle.
+* @retval None
+*/
+__weak void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
+{
+/* Prevent unused argument(s) compilation warning */
+UNUSED(huart);
+/* NOTE : This function should not be modified, when the callback is needed,
+the HAL_UART_RxCpltCallback can be implemented in the user file.
+*/
+}
+/**
+* @brief  Rx Half Transfer completed callback.
+* @param  huart: UART handle.
+* @retval None
+*/
+__weak void HAL_UART_RxHalfCpltCallback(UART_HandleTypeDef *huart)
+{
+/* Prevent unused argument(s) compilation warning */
+UNUSED(huart);
+/* NOTE: This function should not be modified, when the callback is needed,
+the HAL_UART_RxHalfCpltCallback can be implemented in the user file.
+*/
+}
+/**
+* @brief UART error callback.
+* @param huart: UART handle.
+* @retval None
+*/
+__weak void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
+{
+/* Prevent unused argument(s) compilation warning */
+UNUSED(huart);
+/* NOTE : This function should not be modified, when the callback is needed,
+the HAL_UART_ErrorCallback can be implemented in the user file.
+*/
+}
+/**
+* @brief  UART Abort Complete callback.
+* @param  huart UART handle.
+* @retval None
+*/
+__weak void HAL_UART_AbortCpltCallback (UART_HandleTypeDef *huart)
+{
+/* Prevent unused argument(s) compilation warning */
+UNUSED(huart);
+/* NOTE : This function should not be modified, when the callback is needed,
+the HAL_UART_AbortCpltCallback can be implemented in the user file.
+*/
+}
+/**
+* @brief  UART Abort Complete callback.
+* @param  huart UART handle.
+* @retval None
+*/
+__weak void HAL_UART_AbortTransmitCpltCallback (UART_HandleTypeDef *huart)
+{
+/* Prevent unused argument(s) compilation warning */
+UNUSED(huart);
+/* NOTE : This function should not be modified, when the callback is needed,
+the HAL_UART_AbortTransmitCpltCallback can be implemented in the user file.
+*/
+}
+/**
+* @brief  UART Abort Receive Complete callback.
+* @param  huart UART handle.
+* @retval None
+*/
+__weak void HAL_UART_AbortReceiveCpltCallback (UART_HandleTypeDef *huart)
+{
+/* Prevent unused argument(s) compilation warning */
+UNUSED(huart);
+/* NOTE : This function should not be modified, when the callback is needed,
+the HAL_UART_AbortReceiveCpltCallback can be implemented in the user file.
+*/
+}
+/**
+* @}
+*/
+/** @defgroup UART_Exported_Functions_Group3 Peripheral Control functions
+*  @brief   UART control functions
+*
+@verbatim
+===============================================================================
+##### Peripheral Control functions #####
+===============================================================================
+[..]
+This subsection provides a set of functions allowing to control the UART.
+(+) HAL_MultiProcessor_EnableMuteMode() API enables mute mode
+(+) HAL_MultiProcessor_DisableMuteMode() API disables mute mode
+(+) HAL_MultiProcessor_EnterMuteMode() API enters mute mode
+(+) UART_SetConfig() API configures the UART peripheral
+(+) UART_AdvFeatureConfig() API optionally configures the UART advanced features
+(+) UART_CheckIdleState() API ensures that TEACK and/or REACK are set after initialization
+(+) HAL_HalfDuplex_EnableTransmitter() API disables receiver and enables transmitter
+(+) HAL_HalfDuplex_EnableReceiver() API disables transmitter and enables receiver
+(+) HAL_LIN_SendBreak() API transmits the break characters
+@endverbatim
+* @{
+*/
+/**
+* @brief Enable UART in mute mode (does not mean UART enters mute mode;
+* to enter mute mode, HAL_MultiProcessor_EnterMuteMode() API must be called).
+* @param huart: UART handle.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_MultiProcessor_EnableMuteMode(UART_HandleTypeDef *huart)
+{
+/* Process Locked */
+__HAL_LOCK(huart);
+huart->gState = HAL_UART_STATE_BUSY;
+/* Enable USART mute mode by setting the MME bit in the CR1 register */
+SET_BIT(huart->Instance->CR1, USART_CR1_MME);
+huart->gState = HAL_UART_STATE_READY;
+return (UART_CheckIdleState(huart));
+}
+/**
+* @brief  Disable UART mute mode (does not mean the UART actually exits mute mode
+*         as it may not have been in mute mode at this very moment).
+* @param  huart: UART handle.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_MultiProcessor_DisableMuteMode(UART_HandleTypeDef *huart)
+{
+/* Process Locked */
+__HAL_LOCK(huart);
+huart->gState = HAL_UART_STATE_BUSY;
+/* Disable USART mute mode by clearing the MME bit in the CR1 register */
+CLEAR_BIT(huart->Instance->CR1, USART_CR1_MME);
+huart->gState = HAL_UART_STATE_READY;
+return (UART_CheckIdleState(huart));
+}
+/**
+* @brief Enter UART mute mode (means UART actually enters mute mode).
+* @note  To exit from mute mode, HAL_MultiProcessor_DisableMuteMode() API must be called.
+* @param huart: UART handle.
+* @retval None
+*/
+void HAL_MultiProcessor_EnterMuteMode(UART_HandleTypeDef *huart)
+{
+__HAL_UART_SEND_REQ(huart, UART_MUTE_MODE_REQUEST);
+}
+/**
+* @brief  Enable the UART transmitter and disable the UART receiver.
+* @param  huart: UART handle.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_HalfDuplex_EnableTransmitter(UART_HandleTypeDef *huart)
+{
+/* Process Locked */
+__HAL_LOCK(huart);
+huart->gState = HAL_UART_STATE_BUSY;
+/* Clear TE and RE bits */
+CLEAR_BIT(huart->Instance->CR1, (USART_CR1_TE | USART_CR1_RE));
+/* Enable the USART's transmit interface by setting the TE bit in the USART CR1 register */
+SET_BIT(huart->Instance->CR1, USART_CR1_TE);
+huart->gState = HAL_UART_STATE_READY;
+/* Process Unlocked */
+__HAL_UNLOCK(huart);
+return HAL_OK;
+}
+/**
+* @brief  Enable the UART receiver and disable the UART transmitter.
+* @param  huart: UART handle.
+* @retval HAL status.
+*/
+HAL_StatusTypeDef HAL_HalfDuplex_EnableReceiver(UART_HandleTypeDef *huart)
+{
+/* Process Locked */
+__HAL_LOCK(huart);
+huart->gState = HAL_UART_STATE_BUSY;
+/* Clear TE and RE bits */
+CLEAR_BIT(huart->Instance->CR1, (USART_CR1_TE | USART_CR1_RE));
+/* Enable the USART's receive interface by setting the RE bit in the USART CR1 register */
+SET_BIT(huart->Instance->CR1, USART_CR1_RE);
+huart->gState = HAL_UART_STATE_READY;
+/* Process Unlocked */
+__HAL_UNLOCK(huart);
+return HAL_OK;
+}
+/**
+* @brief  Transmit break characters.
+* @param  huart: UART handle.
+* @retval HAL status
+*/
+HAL_StatusTypeDef HAL_LIN_SendBreak(UART_HandleTypeDef *huart)
+{
+/* Check the parameters */
+assert_param(IS_UART_LIN_INSTANCE(huart->Instance));
+/* Process Locked */
+__HAL_LOCK(huart);
+huart->gState = HAL_UART_STATE_BUSY;
+/* Send break characters */
+huart->Instance->RQR |= UART_SENDBREAK_REQUEST;
+huart->gState = HAL_UART_STATE_READY;
+/* Process Unlocked */
+__HAL_UNLOCK(huart);
+return HAL_OK;
+}
+/**
+* @}
+*/
+/** @defgroup UART_Exported_Functions_Group4 Peripheral State and Error functions
+*  @brief   UART Peripheral State functions
+*
+@verbatim
+==============================================================================
+##### Peripheral State and Error functions #####
+==============================================================================
+[..]
+This subsection provides functions allowing to :
+(+) Return the UART handle state.
+(+) Return the UART handle error code
+@endverbatim
+* @{
+*/
+/**
+* @brief  Return the UART handle state.
+* @param  huart Pointer to a UART_HandleTypeDef structure that contains
+*               the configuration information for the specified UART.
+* @retval HAL state
+*/
+HAL_UART_StateTypeDef HAL_UART_GetState(UART_HandleTypeDef *huart)
+{
+uint32_t temp1= 0x00, temp2 = 0x00;
+temp1 = huart->gState;
+temp2 = huart->RxState;
+return (HAL_UART_StateTypeDef)(temp1 | temp2);
+}
+/**
+* @brief  Return the UART handle error code.
+* @param  huart Pointer to a UART_HandleTypeDef structure that contains
+*               the configuration information for the specified UART.
+* @retval UART Error Code
+*/
+uint32_t HAL_UART_GetError(UART_HandleTypeDef *huart)
+{
+return huart->ErrorCode;
+}
+/**
+* @}
+*/
+/**
+* @}
+*/
+/** @defgroup UART_Private_Functions UART Private Functions
+* @{
+*/
+/**
+* @brief Configure the UART peripheral.
+* @param huart: UART handle.
+* @retval HAL status
+*/
+HAL_StatusTypeDef UART_SetConfig(UART_HandleTypeDef *huart)
+{
+uint32_t tmpreg                     = 0x00000000;
+UART_ClockSourceTypeDef clocksource = UART_CLOCKSOURCE_UNDEFINED;
+uint16_t brrtemp                    = 0x0000;
+uint16_t usartdiv                   = 0x0000;
+HAL_StatusTypeDef ret               = HAL_OK;
+/* Check the parameters */
+assert_param(IS_UART_BAUDRATE(huart->Init.BaudRate));
+assert_param(IS_UART_WORD_LENGTH(huart->Init.WordLength));
+if(UART_INSTANCE_LOWPOWER(huart))
+{
+assert_param(IS_LPUART_STOPBITS(huart->Init.StopBits));
+}
+else
+{
+assert_param(IS_UART_STOPBITS(huart->Init.StopBits));
+assert_param(IS_UART_ONE_BIT_SAMPLE(huart->Init.OneBitSampling));
+}
+assert_param(IS_UART_PARITY(huart->Init.Parity));
+assert_param(IS_UART_MODE(huart->Init.Mode));
+assert_param(IS_UART_HARDWARE_FLOW_CONTROL(huart->Init.HwFlowCtl));
+assert_param(IS_UART_OVERSAMPLING(huart->Init.OverSampling));
+/*-------------------------- USART CR1 Configuration -----------------------*/
+/* Clear M, PCE, PS, TE, RE and OVER8 bits and configure
+*  the UART Word Length, Parity, Mode and oversampling:
+*  set the M bits according to huart->Init.WordLength value
+*  set PCE and PS bits according to huart->Init.Parity value
+*  set TE and RE bits according to huart->Init.Mode value
+*  set OVER8 bit according to huart->Init.OverSampling value */
+tmpreg = (uint32_t)huart->Init.WordLength | huart->Init.Parity | huart->Init.Mode | huart->Init.OverSampling ;
+MODIFY_REG(huart->Instance->CR1, UART_CR1_FIELDS, tmpreg);
+/*-------------------------- USART CR2 Configuration -----------------------*/
+/* Configure the UART Stop Bits: Set STOP[13:12] bits according
+* to huart->Init.StopBits value */
+MODIFY_REG(huart->Instance->CR2, USART_CR2_STOP, huart->Init.StopBits);
+/*-------------------------- USART CR3 Configuration -----------------------*/
+/* Configure
+* - UART HardWare Flow Control: set CTSE and RTSE bits according
+*   to huart->Init.HwFlowCtl value
+* - one-bit sampling method versus three samples' majority rule according
+*   to huart->Init.OneBitSampling (not applicable to LPUART) */
+tmpreg = (uint32_t)huart->Init.HwFlowCtl;
+if (!(UART_INSTANCE_LOWPOWER(huart)))
+{
+tmpreg |= huart->Init.OneBitSampling;
+}
+MODIFY_REG(huart->Instance->CR3, (USART_CR3_RTSE | USART_CR3_CTSE | USART_CR3_ONEBIT), tmpreg);
+/*-------------------------- USART BRR Configuration -----------------------*/
+UART_GETCLOCKSOURCE(huart, clocksource);
+/* Check LPUART instance */
+if(UART_INSTANCE_LOWPOWER(huart))
+{
+/* Retrieve frequency clock */
+tmpreg = 0;
+switch (clocksource)
+{
+case UART_CLOCKSOURCE_PCLK1:
+tmpreg = HAL_RCC_GetPCLK1Freq();
+break;
+case UART_CLOCKSOURCE_HSI:
+tmpreg = (uint32_t) HSI_VALUE;
+break;
+case UART_CLOCKSOURCE_SYSCLK:
+tmpreg = HAL_RCC_GetSysClockFreq();
+break;
+case UART_CLOCKSOURCE_LSE:
+tmpreg = (uint32_t) LSE_VALUE;
+break;
+case UART_CLOCKSOURCE_UNDEFINED:
+default:
+ret = HAL_ERROR;
+break;
+}
+/* if proper clock source reported */
+if (tmpreg != 0)
+{
+/* ensure that Frequency clock is in the range [3 * baudrate, 4096 * baudrate] */
+if ( (tmpreg < (3 * huart->Init.BaudRate) ) ||
+(tmpreg > (4096 * huart->Init.BaudRate) ))
+{
+ret = HAL_ERROR;
+}
+else
+{
+switch (clocksource)
+{
+case UART_CLOCKSOURCE_PCLK1:
+tmpreg = (uint32_t)(UART_DIV_LPUART(HAL_RCC_GetPCLK1Freq(), huart->Init.BaudRate));
+break;
+case UART_CLOCKSOURCE_HSI:
+tmpreg = (uint32_t)(UART_DIV_LPUART(HSI_VALUE, huart->Init.BaudRate));
+break;
+case UART_CLOCKSOURCE_SYSCLK:
+tmpreg = (uint32_t)(UART_DIV_LPUART(HAL_RCC_GetSysClockFreq(), huart->Init.BaudRate));
+break;
+case UART_CLOCKSOURCE_LSE:
+tmpreg = (uint32_t)(UART_DIV_LPUART(LSE_VALUE, huart->Init.BaudRate));
+break;
+case UART_CLOCKSOURCE_UNDEFINED:
+default:
+ret = HAL_ERROR;
+break;
+}
+if ((tmpreg >= UART_LPUART_BRR_MIN) && (tmpreg <= UART_LPUART_BRR_MAX))
+{
+huart->Instance->BRR = tmpreg;
+}
+else
+{
+ret = HAL_ERROR;
+}
+}  /*   if ( (tmpreg < (3 * huart->Init.BaudRate) ) || (tmpreg > (4096 * huart->Init.BaudRate) )) */
+} /* if (tmpreg != 0) */
+}
+/* Check UART Over Sampling to set Baud Rate Register */
+else if (huart->Init.OverSampling == UART_OVERSAMPLING_8)
+{
+switch (clocksource)
+{
+case UART_CLOCKSOURCE_PCLK1:
+usartdiv = (uint16_t)(UART_DIV_SAMPLING8(HAL_RCC_GetPCLK1Freq(), huart->Init.BaudRate));
+break;
+case UART_CLOCKSOURCE_PCLK2:
+usartdiv = (uint16_t)(UART_DIV_SAMPLING8(HAL_RCC_GetPCLK2Freq(), huart->Init.BaudRate));
+break;
+case UART_CLOCKSOURCE_HSI:
+usartdiv = (uint16_t)(UART_DIV_SAMPLING8(HSI_VALUE, huart->Init.BaudRate));
+break;
+case UART_CLOCKSOURCE_SYSCLK:
+usartdiv = (uint16_t)(UART_DIV_SAMPLING8(HAL_RCC_GetSysClockFreq(), huart->Init.BaudRate));
+break;
+case UART_CLOCKSOURCE_LSE:
+usartdiv = (uint16_t)(UART_DIV_SAMPLING8(LSE_VALUE, huart->Init.BaudRate));
+break;
+case UART_CLOCKSOURCE_UNDEFINED:
+default:
+ret = HAL_ERROR;
+break;
+}
+brrtemp = usartdiv & 0xFFF0;
+brrtemp |= (uint16_t)((usartdiv & (uint16_t)0x000F) >> 1U);
+huart->Instance->BRR = brrtemp;
+}
+else
+{
+switch (clocksource)
+{
+case UART_CLOCKSOURCE_PCLK1:
+huart->Instance->BRR = (uint16_t)(UART_DIV_SAMPLING16(HAL_RCC_GetPCLK1Freq(), huart->Init.BaudRate));
+break;
+case UART_CLOCKSOURCE_PCLK2:
+huart->Instance->BRR = (uint16_t)(UART_DIV_SAMPLING16(HAL_RCC_GetPCLK2Freq(), huart->Init.BaudRate));
+break;
+case UART_CLOCKSOURCE_HSI:
+huart->Instance->BRR = (uint16_t)(UART_DIV_SAMPLING16(HSI_VALUE, huart->Init.BaudRate));
+break;
+case UART_CLOCKSOURCE_SYSCLK:
+huart->Instance->BRR = (uint16_t)(UART_DIV_SAMPLING16(HAL_RCC_GetSysClockFreq(), huart->Init.BaudRate));
+break;
+case UART_CLOCKSOURCE_LSE:
+huart->Instance->BRR = (uint16_t)(UART_DIV_SAMPLING16(LSE_VALUE, huart->Init.BaudRate));
+break;
+case UART_CLOCKSOURCE_UNDEFINED:
+default:
+ret = HAL_ERROR;
+break;
+}
+}
+return ret;
+}
+/**
+* @brief Configure the UART peripheral advanced features.
+* @param huart: UART handle.
+* @retval None
+*/
+void UART_AdvFeatureConfig(UART_HandleTypeDef *huart)
+{
+/* Check whether the set of advanced features to configure is properly set */
+assert_param(IS_UART_ADVFEATURE_INIT(huart->AdvancedInit.AdvFeatureInit));
+/* if required, configure TX pin active level inversion */
+if(HAL_IS_BIT_SET(huart->AdvancedInit.AdvFeatureInit, UART_ADVFEATURE_TXINVERT_INIT))
+{
+assert_param(IS_UART_ADVFEATURE_TXINV(huart->AdvancedInit.TxPinLevelInvert));
+MODIFY_REG(huart->Instance->CR2, USART_CR2_TXINV, huart->AdvancedInit.TxPinLevelInvert);
+}
+/* if required, configure RX pin active level inversion */
+if(HAL_IS_BIT_SET(huart->AdvancedInit.AdvFeatureInit, UART_ADVFEATURE_RXINVERT_INIT))
+{
+assert_param(IS_UART_ADVFEATURE_RXINV(huart->AdvancedInit.RxPinLevelInvert));
+MODIFY_REG(huart->Instance->CR2, USART_CR2_RXINV, huart->AdvancedInit.RxPinLevelInvert);
+}
+/* if required, configure data inversion */
+if(HAL_IS_BIT_SET(huart->AdvancedInit.AdvFeatureInit, UART_ADVFEATURE_DATAINVERT_INIT))
+{
+assert_param(IS_UART_ADVFEATURE_DATAINV(huart->AdvancedInit.DataInvert));
+MODIFY_REG(huart->Instance->CR2, USART_CR2_DATAINV, huart->AdvancedInit.DataInvert);
+}
+/* if required, configure RX/TX pins swap */
+if(HAL_IS_BIT_SET(huart->AdvancedInit.AdvFeatureInit, UART_ADVFEATURE_SWAP_INIT))
+{
+assert_param(IS_UART_ADVFEATURE_SWAP(huart->AdvancedInit.Swap));
+MODIFY_REG(huart->Instance->CR2, USART_CR2_SWAP, huart->AdvancedInit.Swap);
+}
+/* if required, configure RX overrun detection disabling */
+if(HAL_IS_BIT_SET(huart->AdvancedInit.AdvFeatureInit, UART_ADVFEATURE_RXOVERRUNDISABLE_INIT))
+{
+assert_param(IS_UART_OVERRUN(huart->AdvancedInit.OverrunDisable));
+MODIFY_REG(huart->Instance->CR3, USART_CR3_OVRDIS, huart->AdvancedInit.OverrunDisable);
+}
+/* if required, configure DMA disabling on reception error */
+if(HAL_IS_BIT_SET(huart->AdvancedInit.AdvFeatureInit, UART_ADVFEATURE_DMADISABLEONERROR_INIT))
+{
+assert_param(IS_UART_ADVFEATURE_DMAONRXERROR(huart->AdvancedInit.DMADisableonRxError));
+MODIFY_REG(huart->Instance->CR3, USART_CR3_DDRE, huart->AdvancedInit.DMADisableonRxError);
+}
+/* if required, configure auto Baud rate detection scheme */
+if(HAL_IS_BIT_SET(huart->AdvancedInit.AdvFeatureInit, UART_ADVFEATURE_AUTOBAUDRATE_INIT))
+{
+assert_param(IS_USART_AUTOBAUDRATE_DETECTION_INSTANCE(huart->Instance));
+assert_param(IS_UART_ADVFEATURE_AUTOBAUDRATE(huart->AdvancedInit.AutoBaudRateEnable));
+MODIFY_REG(huart->Instance->CR2, USART_CR2_ABREN, huart->AdvancedInit.AutoBaudRateEnable);
+/* set auto Baudrate detection parameters if detection is enabled */
+if(huart->AdvancedInit.AutoBaudRateEnable == UART_ADVFEATURE_AUTOBAUDRATE_ENABLE)
+{
+assert_param(IS_UART_ADVFEATURE_AUTOBAUDRATEMODE(huart->AdvancedInit.AutoBaudRateMode));
+MODIFY_REG(huart->Instance->CR2, USART_CR2_ABRMODE, huart->AdvancedInit.AutoBaudRateMode);
+}
+}
+/* if required, configure MSB first on communication line */
+if(HAL_IS_BIT_SET(huart->AdvancedInit.AdvFeatureInit, UART_ADVFEATURE_MSBFIRST_INIT))
+{
+assert_param(IS_UART_ADVFEATURE_MSBFIRST(huart->AdvancedInit.MSBFirst));
+MODIFY_REG(huart->Instance->CR2, USART_CR2_MSBFIRST, huart->AdvancedInit.MSBFirst);
+}
+}
+/**
+* @brief Check the UART Idle State.
+* @param huart UART handle.
+* @retval HAL status
+*/
+HAL_StatusTypeDef UART_CheckIdleState(UART_HandleTypeDef *huart)
+{
+uint32_t tickstart = 0;
+/* Initialize the UART ErrorCode */
+huart->ErrorCode = HAL_UART_ERROR_NONE;
+/* Init tickstart for timeout managment*/
+tickstart = HAL_GetTick();
+/* Check if the Transmitter is enabled */
+if((huart->Instance->CR1 & USART_CR1_TE) == USART_CR1_TE)
+{
+/* Wait until TEACK flag is set */
+if(UART_WaitOnFlagUntilTimeout(huart, USART_ISR_TEACK, RESET, tickstart, HAL_UART_TIMEOUT_VALUE) != HAL_OK)
+{
+/* Timeout occurred */
+return HAL_TIMEOUT;
+}
+}
+/* Check if the Receiver is enabled */
+if((huart->Instance->CR1 & USART_CR1_RE) == USART_CR1_RE)
+{
+/* Wait until REACK flag is set */
+if(UART_WaitOnFlagUntilTimeout(huart, USART_ISR_REACK, RESET, tickstart, HAL_UART_TIMEOUT_VALUE) != HAL_OK)
+{
+/* Timeout occurred */
+return HAL_TIMEOUT;
+}
+}
+/* Initialize the UART State */
+huart->gState  = HAL_UART_STATE_READY;
+huart->RxState = HAL_UART_STATE_READY;
+/* Process Unlocked */
+__HAL_UNLOCK(huart);
+return HAL_OK;
+}
+/**
+* @brief  Handle UART Communication Timeout.
+* @param  huart UART handle.
+* @param  Flag Specifies the UART flag to check
+* @param  Status Flag status (SET or RESET)
+* @param  Tickstart Tick start value
+* @param  Timeout Timeout duration
+* @retval HAL status
+*/
+HAL_StatusTypeDef UART_WaitOnFlagUntilTimeout(UART_HandleTypeDef *huart, uint32_t Flag, FlagStatus Status, uint32_t Tickstart, uint32_t Timeout)
+{
+/* Wait until flag is set */
+while((__HAL_UART_GET_FLAG(huart, Flag) ? SET : RESET) == Status)
+{
+/* Check for the Timeout */
+if(Timeout != HAL_MAX_DELAY)
+{
+if((Timeout == 0) || ((HAL_GetTick()-Tickstart) > Timeout))
+{
+/* Disable TXE, RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts for the interrupt process */
+CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE | USART_CR1_TXEIE));
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
+huart->gState  = HAL_UART_STATE_READY;
+huart->RxState = HAL_UART_STATE_READY;
+/* Process Unlocked */
+__HAL_UNLOCK(huart);
+return HAL_TIMEOUT;
+}
+}
+}
+return HAL_OK;
+}
+/**
+* @brief  End ongoing Tx transfer on UART peripheral (following error detection or Transmit completion).
+* @param  huart UART handle.
+* @retval None
+*/
+static void UART_EndTxTransfer(UART_HandleTypeDef *huart)
+{
+/* Disable TXEIE and TCIE interrupts */
+CLEAR_BIT(huart->Instance->CR1, (USART_CR1_TXEIE | USART_CR1_TCIE));
+/* At end of Tx process, restore huart->gState to Ready */
+huart->gState = HAL_UART_STATE_READY;
+}
+/**
+* @brief  End ongoing Rx transfer on UART peripheral (following error detection or Reception completion).
+* @param  huart UART handle.
+* @retval None
+*/
+static void UART_EndRxTransfer(UART_HandleTypeDef *huart)
+{
+/* Disable RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts */
+CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
+/* At end of Rx process, restore huart->RxState to Ready */
+huart->RxState = HAL_UART_STATE_READY;
+}
+/**
+* @brief DMA UART transmit process complete callback.
+* @param hdma DMA handle.
+* @retval None
+*/
+static void UART_DMATransmitCplt(DMA_HandleTypeDef *hdma)
+{
+UART_HandleTypeDef* huart = (UART_HandleTypeDef*)(hdma->Parent);
+/* DMA Normal mode */
+if ( HAL_IS_BIT_CLR(hdma->Instance->CCR, DMA_CCR_CIRC) )
+{
+huart->TxXferCount = 0;
+/* Disable the DMA transfer for transmit request by resetting the DMAT bit
+in the UART CR3 register */
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
+/* Enable the UART Transmit Complete Interrupt */
+SET_BIT(huart->Instance->CR1, USART_CR1_TCIE);
+}
+/* DMA Circular mode */
+else
+{
+HAL_UART_TxCpltCallback(huart);
+}
+}
+/**
+* @brief DMA UART transmit process half complete callback.
+* @param hdma DMA handle.
+* @retval None
+*/
+static void UART_DMATxHalfCplt(DMA_HandleTypeDef *hdma)
+{
+UART_HandleTypeDef* huart = (UART_HandleTypeDef*)(hdma->Parent);
+HAL_UART_TxHalfCpltCallback(huart);
+}
+/**
+* @brief DMA UART receive process complete callback.
+* @param hdma DMA handle.
+* @retval None
+*/
+static void UART_DMAReceiveCplt(DMA_HandleTypeDef *hdma)
+{
+UART_HandleTypeDef* huart = (UART_HandleTypeDef*)(hdma->Parent);
+/* DMA Normal mode */
+if ( HAL_IS_BIT_CLR(hdma->Instance->CCR, DMA_CCR_CIRC) )
+{
+huart->RxXferCount = 0;
+/* Disable PE and ERR (Frame error, noise error, overrun error) interrupts */
+CLEAR_BIT(huart->Instance->CR1, USART_CR1_PEIE);
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
+/* Disable the DMA transfer for the receiver request by resetting the DMAR bit
+in the UART CR3 register */
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
+/* At end of Rx process, restore huart->RxState to Ready */
+huart->RxState = HAL_UART_STATE_READY;
+}
+HAL_UART_RxCpltCallback(huart);
+}
+/**
+* @brief DMA UART receive process half complete callback.
+* @param hdma DMA handle.
+* @retval None
+*/
+static void UART_DMARxHalfCplt(DMA_HandleTypeDef *hdma)
+{
+UART_HandleTypeDef* huart = (UART_HandleTypeDef*)(hdma->Parent);
+HAL_UART_RxHalfCpltCallback(huart);
+}
+/**
+* @brief DMA UART communication error callback.
+* @param hdma DMA handle.
+* @retval None
+*/
+static void UART_DMAError(DMA_HandleTypeDef *hdma)
+{
+UART_HandleTypeDef* huart = (UART_HandleTypeDef*)(hdma->Parent);
+/* Stop UART DMA Tx request if ongoing */
+if (  (huart->gState == HAL_UART_STATE_BUSY_TX)
+&&(HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAT)) )
+{
+huart->TxXferCount = 0;
+UART_EndTxTransfer(huart);
+}
+/* Stop UART DMA Rx request if ongoing */
+if (  (huart->RxState == HAL_UART_STATE_BUSY_RX)
+&&(HAL_IS_BIT_SET(huart->Instance->CR3, USART_CR3_DMAR)) )
+{
+huart->RxXferCount = 0;
+UART_EndRxTransfer(huart);
+}
+huart->ErrorCode |= HAL_UART_ERROR_DMA;
+HAL_UART_ErrorCallback(huart);
+}
+/**
+* @brief  DMA UART communication abort callback, when initiated by HAL services on Error
+*         (To be called at end of DMA Abort procedure following error occurrence).
+* @param  hdma DMA handle.
+* @retval None
+*/
+static void UART_DMAAbortOnError(DMA_HandleTypeDef *hdma)
+{
+UART_HandleTypeDef* huart = (UART_HandleTypeDef*)(hdma->Parent);
+huart->RxXferCount = 0;
+huart->TxXferCount = 0;
+HAL_UART_ErrorCallback(huart);
+}
+/**
+* @brief  DMA UART Tx communication abort callback, when initiated by user
+*         (To be called at end of DMA Tx Abort procedure following user abort request).
+* @note   When this callback is executed, User Abort complete call back is called only if no
+*         Abort still ongoing for Rx DMA Handle.
+* @param  hdma DMA handle.
+* @retval None
+*/
+static void UART_DMATxAbortCallback(DMA_HandleTypeDef *hdma)
+{
+UART_HandleTypeDef* huart = (UART_HandleTypeDef* )(hdma->Parent);
+huart->hdmatx->XferAbortCallback = NULL;
+/* Check if an Abort process is still ongoing */
+if(huart->hdmarx != NULL)
+{
+if(huart->hdmarx->XferAbortCallback != NULL)
+{
+return;
+}
+}
+/* No Abort process still ongoing : All DMA channels are aborted, call user Abort Complete callback */
+huart->TxXferCount = 0;
+huart->RxXferCount = 0;
+/* Reset errorCode */
+huart->ErrorCode = HAL_UART_ERROR_NONE;
+/* Clear the Error flags in the ICR register */
+__HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF | UART_CLEAR_NEF | UART_CLEAR_PEF | UART_CLEAR_FEF);
+/* Restore huart->gState and huart->RxState to Ready */
+huart->gState  = HAL_UART_STATE_READY;
+huart->RxState = HAL_UART_STATE_READY;
+/* Call user Abort complete callback */
+HAL_UART_AbortCpltCallback(huart);
+}
+/**
+* @brief  DMA UART Rx communication abort callback, when initiated by user
+*         (To be called at end of DMA Rx Abort procedure following user abort request).
+* @note   When this callback is executed, User Abort complete call back is called only if no
+*         Abort still ongoing for Tx DMA Handle.
+* @param  hdma DMA handle.
+* @retval None
+*/
+static void UART_DMARxAbortCallback(DMA_HandleTypeDef *hdma)
+{
+UART_HandleTypeDef* huart = (UART_HandleTypeDef* )(hdma->Parent);
+huart->hdmarx->XferAbortCallback = NULL;
+/* Check if an Abort process is still ongoing */
+if(huart->hdmatx != NULL)
+{
+if(huart->hdmatx->XferAbortCallback != NULL)
+{
+return;
+}
+}
+/* No Abort process still ongoing : All DMA channels are aborted, call user Abort Complete callback */
+huart->TxXferCount = 0;
+huart->RxXferCount = 0;
+/* Reset errorCode */
+huart->ErrorCode = HAL_UART_ERROR_NONE;
+/* Clear the Error flags in the ICR register */
+__HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF | UART_CLEAR_NEF | UART_CLEAR_PEF | UART_CLEAR_FEF);
+/* Restore huart->gState and huart->RxState to Ready */
+huart->gState  = HAL_UART_STATE_READY;
+huart->RxState = HAL_UART_STATE_READY;
+/* Call user Abort complete callback */
+HAL_UART_AbortCpltCallback(huart);
+}
+/**
+* @brief  DMA UART Tx communication abort callback, when initiated by user by a call to
+*         HAL_UART_AbortTransmit_IT API (Abort only Tx transfer)
+*         (This callback is executed at end of DMA Tx Abort procedure following user abort request,
+*         and leads to user Tx Abort Complete callback execution).
+* @param  hdma DMA handle.
+* @retval None
+*/
+static void UART_DMATxOnlyAbortCallback(DMA_HandleTypeDef *hdma)
+{
+UART_HandleTypeDef* huart = (UART_HandleTypeDef*)(hdma->Parent);
+huart->TxXferCount = 0;
+/* Restore huart->gState to Ready */
+huart->gState = HAL_UART_STATE_READY;
+/* Call user Abort complete callback */
+HAL_UART_AbortTransmitCpltCallback(huart);
+}
+/**
+* @brief  DMA UART Rx communication abort callback, when initiated by user by a call to
+*         HAL_UART_AbortReceive_IT API (Abort only Rx transfer)
+*         (This callback is executed at end of DMA Rx Abort procedure following user abort request,
+*         and leads to user Rx Abort Complete callback execution).
+* @param  hdma DMA handle.
+* @retval None
+*/
+static void UART_DMARxOnlyAbortCallback(DMA_HandleTypeDef *hdma)
+{
+UART_HandleTypeDef* huart = ( UART_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
+huart->RxXferCount = 0;
+/* Clear the Error flags in the ICR register */
+__HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF | UART_CLEAR_NEF | UART_CLEAR_PEF | UART_CLEAR_FEF);
+/* Restore huart->RxState to Ready */
+huart->RxState = HAL_UART_STATE_READY;
+/* Call user Abort complete callback */
+HAL_UART_AbortReceiveCpltCallback(huart);
+}
+/**
+* @brief  Send an amount of data in interrupt mode.
+* @note   Function is called under interruption only, once
+*         interruptions have been enabled by HAL_UART_Transmit_IT().
+* @param  huart UART handle.
+* @retval HAL status
+*/
+static HAL_StatusTypeDef UART_Transmit_IT(UART_HandleTypeDef *huart)
+{
+uint16_t* tmp;
+/* Check that a Tx process is ongoing */
+if (huart->gState == HAL_UART_STATE_BUSY_TX)
+{
+if(huart->TxXferCount == 0)
+{
+/* Disable the UART Transmit Data Register Empty Interrupt */
+CLEAR_BIT(huart->Instance->CR1, USART_CR1_TXEIE);
+/* Enable the UART Transmit Complete Interrupt */
+SET_BIT(huart->Instance->CR1, USART_CR1_TCIE);
+return HAL_OK;
+}
+else
+{
+if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
+{
+tmp = (uint16_t*) huart->pTxBuffPtr;
+huart->Instance->TDR = (*tmp & (uint16_t)0x01FF);
+huart->pTxBuffPtr += 2;
+}
+else
+{
+huart->Instance->TDR = (uint8_t)(*huart->pTxBuffPtr++ & (uint8_t)0xFF);
+}
+huart->TxXferCount--;
+return HAL_OK;
+}
+}
+else
+{
+return HAL_BUSY;
+}
+}
+/**
+* @brief  Wrap up transmission in non-blocking mode.
+* @param  huart pointer to a UART_HandleTypeDef structure that contains
+*               the configuration information for the specified UART module.
+* @retval HAL status
+*/
+static HAL_StatusTypeDef UART_EndTransmit_IT(UART_HandleTypeDef *huart)
+{
+/* Disable the UART Transmit Complete Interrupt */
+CLEAR_BIT(huart->Instance->CR1, USART_CR1_TCIE);
+/* Tx process is ended, restore huart->gState to Ready */
+huart->gState = HAL_UART_STATE_READY;
+HAL_UART_TxCpltCallback(huart);
+return HAL_OK;
+}
+/**
+* @brief  Receive an amount of data in interrupt mode.
+* @note   Function is called under interruption only, once
+*         interruptions have been enabled by HAL_UART_Receive_IT()
+* @param  huart UART handle.
+* @retval HAL status
+*/
+static HAL_StatusTypeDef UART_Receive_IT(UART_HandleTypeDef *huart)
+{
+uint16_t* tmp;
+uint16_t  uhMask = huart->Mask;
+uint16_t  uhdata;
+/* Check that a Rx process is ongoing */
+if(huart->RxState == HAL_UART_STATE_BUSY_RX)
+{
+uhdata = (uint16_t) READ_REG(huart->Instance->RDR);
+if ((huart->Init.WordLength == UART_WORDLENGTH_9B) && (huart->Init.Parity == UART_PARITY_NONE))
+{
+tmp = (uint16_t*) huart->pRxBuffPtr ;
+*tmp = (uint16_t)(uhdata & uhMask);
+huart->pRxBuffPtr +=2;
+}
+else
+{
+*huart->pRxBuffPtr++ = (uint8_t)(uhdata & (uint8_t)uhMask);
+}
+if(--huart->RxXferCount == 0)
+{
+/* Disable the UART Parity Error Interrupt and RXNE interrupt*/
+CLEAR_BIT(huart->Instance->CR1, (USART_CR1_RXNEIE | USART_CR1_PEIE));
+/* Disable the UART Error Interrupt: (Frame error, noise error, overrun error) */
+CLEAR_BIT(huart->Instance->CR3, USART_CR3_EIE);
+/* Rx process is completed, restore huart->RxState to Ready */
+huart->RxState = HAL_UART_STATE_READY;
+HAL_UART_RxCpltCallback(huart);
+return HAL_OK;
+}
+return HAL_OK;
+}
+else
+{
+/* Clear RXNE interrupt flag */
+__HAL_UART_SEND_REQ(huart, UART_RXDATA_FLUSH_REQUEST);
+return HAL_BUSY;
+}
+}
+/**
+* @}
+*/
+#endif /* HAL_UART_MODULE_ENABLED */
+/**
+* @}
+*/
+/**
+* @}
+*/
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

Mercurial > pub > halpp

comparison l476rg/Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart.c @ 0:32a3b1785697