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/**

  ******************************************************************************

  * @file    stm32l1xx_hal_usart.c

  * @author  MCD Application Team

  * @brief   USART HAL module driver.

  *          This file provides firmware functions to manage the following

  *          functionalities of the Universal Synchronous/Asynchronous Receiver Transmitter

  *          Peripheral (USART).

  *           + Initialization and de-initialization functions

  *           + IO operation functions

  *           + Peripheral Control functions

  @verbatim

  ==============================================================================

                        ##### How to use this driver #####

  ==============================================================================

  [..]

    The USART HAL driver can be used as follows:

    (#) Declare a USART_HandleTypeDef handle structure (eg. USART_HandleTypeDef husart).

    (#) Initialize the USART low level resources by implementing the HAL_USART_MspInit() API:

        (##) Enable the USARTx interface clock.

        (##) USART pins configuration:

             (+++) Enable the clock for the USART GPIOs.

             (+++) Configure the USART pins as alternate function pull-up.

        (##) NVIC configuration if you need to use interrupt process (HAL_USART_Transmit_IT(),

             HAL_USART_Receive_IT() and HAL_USART_TransmitReceive_IT() APIs):

             (+++) Configure the USARTx interrupt priority.

             (+++) Enable the NVIC USART IRQ handle.

        (##) DMA Configuration if you need to use DMA process (HAL_USART_Transmit_DMA()

             HAL_USART_Receive_DMA() and HAL_USART_TransmitReceive_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 USART DMA Tx/Rx handle.

             (+++) Configure the priority and enable the NVIC for the transfer complete interrupt on the DMA Tx/Rx channel.

             (+++) Configure the USARTx interrupt priority and enable the NVIC USART IRQ handle

                   (used for last byte sending completion detection in DMA non circular mode)

    (#) Program the Baud Rate, Word Length, Stop Bit, Parity, Hardware

        flow control and Mode(Receiver/Transmitter) in the husart Init structure.

    (#) Initialize the USART registers by calling the HAL_USART_Init() API:

        (++) These APIs configures also the low level Hardware GPIO, CLOCK, CORTEX...etc)

             by calling the customized HAL_USART_MspInit(&husart) API.

        -@@- The specific USART interrupts (Transmission complete interrupt,

             RXNE interrupt and Error Interrupts) will be managed using the macros

             __HAL_USART_ENABLE_IT() and __HAL_USART_DISABLE_IT() inside the transmit and receive process.

    (#) Three operation modes are available within this driver :

     *** Polling mode IO operation ***

     =================================

     [..]

       (+) Send an amount of data in blocking mode using HAL_USART_Transmit()

       (+) Receive an amount of data in blocking mode using HAL_USART_Receive()

     *** Interrupt mode IO operation ***

     ===================================

     [..]

       (+) Send an amount of data in non blocking mode using HAL_USART_Transmit_IT()

       (+) At transmission end of transfer HAL_USART_TxHalfCpltCallback is executed and user can

            add his own code by customization of function pointer HAL_USART_TxCpltCallback

       (+) Receive an amount of data in non blocking mode using HAL_USART_Receive_IT()

       (+) At reception end of transfer HAL_USART_RxCpltCallback is executed and user can

            add his own code by customization of function pointer HAL_USART_RxCpltCallback

       (+) In case of transfer Error, HAL_USART_ErrorCallback() function is executed and user can

            add his own code by customization of function pointer HAL_USART_ErrorCallback

     *** DMA mode IO operation ***

     ==============================

     [..]

       (+) Send an amount of data in non blocking mode (DMA) using HAL_USART_Transmit_DMA()

       (+) At transmission end of half transfer HAL_USART_TxHalfCpltCallback is executed and user can

            add his own code by customization of function pointer HAL_USART_TxHalfCpltCallback

       (+) At transmission end of transfer HAL_USART_TxCpltCallback is executed and user can

            add his own code by customization of function pointer HAL_USART_TxCpltCallback

       (+) Receive an amount of data in non blocking mode (DMA) using HAL_USART_Receive_DMA()

       (+) At reception end of half transfer HAL_USART_RxHalfCpltCallback is executed and user can

            add his own code by customization of function pointer HAL_USART_RxHalfCpltCallback

       (+) At reception end of transfer HAL_USART_RxCpltCallback is executed and user can

            add his own code by customization of function pointer HAL_USART_RxCpltCallback

       (+) In case of transfer Error, HAL_USART_ErrorCallback() function is executed and user can

            add his own code by customization of function pointer HAL_USART_ErrorCallback

       (+) Pause the DMA Transfer using HAL_USART_DMAPause()

       (+) Resume the DMA Transfer using HAL_USART_DMAResume()

       (+) Stop the DMA Transfer using HAL_USART_DMAStop()

     *** USART HAL driver macros list ***

     =============================================

     [..]

       Below the list of most used macros in USART HAL driver.

       (+) __HAL_USART_ENABLE: Enable the USART peripheral

       (+) __HAL_USART_DISABLE: Disable the USART peripheral

       (+) __HAL_USART_GET_FLAG : Check whether the specified USART flag is set or not

       (+) __HAL_USART_CLEAR_FLAG : Clear the specified USART pending flag

       (+) __HAL_USART_ENABLE_IT: Enable the specified USART interrupt

       (+) __HAL_USART_DISABLE_IT: Disable the specified USART interrupt

     [..]

       (@) You can refer to the USART HAL driver header file for more useful macros

    ##### Callback registration #####

    ==================================

    [..]

    The compilation define USE_HAL_USART_REGISTER_CALLBACKS when set to 1

    allows the user to configure dynamically the driver callbacks.

    [..]

    Use Function @ref HAL_USART_RegisterCallback() to register a user callback.

    Function @ref HAL_USART_RegisterCallback() allows to register following callbacks:

    (+) TxHalfCpltCallback        : Tx Half Complete Callback.

    (+) TxCpltCallback            : Tx Complete Callback.

    (+) RxHalfCpltCallback        : Rx Half Complete Callback.

    (+) RxCpltCallback            : Rx Complete Callback.

    (+) TxRxCpltCallback          : Tx Rx Complete Callback.

    (+) ErrorCallback             : Error Callback.

    (+) AbortCpltCallback         : Abort Complete Callback.

    (+) MspInitCallback           : USART MspInit.

    (+) MspDeInitCallback         : USART MspDeInit.

    This function takes as parameters the HAL peripheral handle, the Callback ID

    and a pointer to the user callback function.

    [..]

    Use function @ref HAL_USART_UnRegisterCallback() to reset a callback to the default

    weak (surcharged) function.

    @ref HAL_USART_UnRegisterCallback() takes as parameters the HAL peripheral handle,

    and the Callback ID.

    This function allows to reset following callbacks:

    (+) TxHalfCpltCallback        : Tx Half Complete Callback.

    (+) TxCpltCallback            : Tx Complete Callback.

    (+) RxHalfCpltCallback        : Rx Half Complete Callback.

    (+) RxCpltCallback            : Rx Complete Callback.

    (+) TxRxCpltCallback          : Tx Rx Complete Callback.

    (+) ErrorCallback             : Error Callback.

    (+) AbortCpltCallback         : Abort Complete Callback.

    (+) MspInitCallback           : USART MspInit.

    (+) MspDeInitCallback         : USART MspDeInit.

    [..]

    By default, after the @ref HAL_USART_Init() and when the state is HAL_USART_STATE_RESET

    all callbacks are set to the corresponding weak (surcharged) functions:

    examples @ref HAL_USART_TxCpltCallback(), @ref HAL_USART_RxHalfCpltCallback().

    Exception done for MspInit and MspDeInit functions that are respectively

    reset to the legacy weak (surcharged) functions in the @ref HAL_USART_Init()

    and @ref HAL_USART_DeInit() only when these callbacks are null (not registered beforehand).

    If not, MspInit or MspDeInit are not null, the @ref HAL_USART_Init() and @ref HAL_USART_DeInit()

    keep and use the user MspInit/MspDeInit callbacks (registered beforehand).

    [..]

    Callbacks can be registered/unregistered in HAL_USART_STATE_READY state only.

    Exception done MspInit/MspDeInit that can be registered/unregistered

    in HAL_USART_STATE_READY or HAL_USART_STATE_RESET state, thus registered (user)

    MspInit/DeInit callbacks can be used during the Init/DeInit.

    In that case first register the MspInit/MspDeInit user callbacks

    using @ref HAL_USART_RegisterCallback() before calling @ref HAL_USART_DeInit()

    or @ref HAL_USART_Init() function.

    [..]

    When The compilation define USE_HAL_USART_REGISTER_CALLBACKS is set to 0 or

    not defined, the callback registration feature is not available

    and weak (surcharged) callbacks are used.

  @endverbatim

     [..]

       (@) Additionnal remark: 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.

           Depending on the frame length defined by the M bit (8-bits or 9-bits),

           the possible USART frame formats are as listed in the following table:

    +-------------------------------------------------------------+

    |   M bit |  PCE bit  |            USART frame                 |

    |---------------------|---------------------------------------|

    |    0    |    0      |    | SB | 8 bit data | STB |          |

    |---------|-----------|---------------------------------------|

    |    0    |    1      |    | SB | 7 bit data | PB | STB |     |

    |---------|-----------|---------------------------------------|

    |    1    |    0      |    | SB | 9 bit data | STB |          |

    |---------|-----------|---------------------------------------|

    |    1    |    1      |    | SB | 8 bit data | PB | STB |     |

    +-------------------------------------------------------------+

  ******************************************************************************

  * @attention

  *

  * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.

  * All rights reserved.</center></h2>

  *

  * This software component is licensed by ST under BSD 3-Clause license,

  * the "License"; You may not use this file except in compliance with the

  * License. You may obtain a copy of the License at:

  *                        opensource.org/licenses/BSD-3-Clause

  *

  ******************************************************************************

  */

/* Includes ------------------------------------------------------------------*/

#include "stm32l1xx_hal.h"

/** @addtogroup STM32L1xx_HAL_Driver

  * @{

  */

/** @defgroup USART USART

  * @brief HAL USART Synchronous module driver

  * @{

  */

#ifdef HAL_USART_MODULE_ENABLED

/* Private typedef -----------------------------------------------------------*/

/* Private define ------------------------------------------------------------*/

/** @addtogroup USART_Private_Constants

  * @{

  */

#define DUMMY_DATA           0xFFFFU

#define USART_TIMEOUT_VALUE  22000U

/**

  * @}

  */

/* Private macro -------------------------------------------------------------*/

/* Private variables ---------------------------------------------------------*/

/* Private function prototypes -----------------------------------------------*/

/* Private functions ---------------------------------------------------------*/

/** @addtogroup USART_Private_Functions

  * @{

  */

#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)

void USART_InitCallbacksToDefault(USART_HandleTypeDef *husart);

#endif /* USE_HAL_USART_REGISTER_CALLBACKS */

static void USART_EndTxTransfer(USART_HandleTypeDef *husart);

static void USART_EndRxTransfer(USART_HandleTypeDef *husart);

static HAL_StatusTypeDef USART_Transmit_IT(USART_HandleTypeDef *husart);

static HAL_StatusTypeDef USART_EndTransmit_IT(USART_HandleTypeDef *husart);

static HAL_StatusTypeDef USART_Receive_IT(USART_HandleTypeDef *husart);

static HAL_StatusTypeDef USART_TransmitReceive_IT(USART_HandleTypeDef *husart);

static void USART_SetConfig(USART_HandleTypeDef *husart);

static void USART_DMATransmitCplt(DMA_HandleTypeDef *hdma);

static void USART_DMATxHalfCplt(DMA_HandleTypeDef *hdma);

static void USART_DMAReceiveCplt(DMA_HandleTypeDef *hdma);

static void USART_DMARxHalfCplt(DMA_HandleTypeDef *hdma);

static void USART_DMAError(DMA_HandleTypeDef *hdma);

static void USART_DMAAbortOnError(DMA_HandleTypeDef *hdma);

static void USART_DMATxAbortCallback(DMA_HandleTypeDef *hdma);

static void USART_DMARxAbortCallback(DMA_HandleTypeDef *hdma);

static HAL_StatusTypeDef USART_WaitOnFlagUntilTimeout(USART_HandleTypeDef *husart, uint32_t Flag, FlagStatus Status, uint32_t Tickstart, uint32_t Timeout);

/**

  * @}

  */

/* Exported functions --------------------------------------------------------*/

/** @defgroup USART_Exported_Functions USART Exported Functions

  * @{

  */

/** @defgroup USART_Exported_Functions_Group1 USART 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 USART

  in asynchronous and in synchronous modes.

  (+) For the asynchronous mode only these parameters 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.

           Depending on the frame length defined by the M bit (8-bits or 9-bits),

           please refer to Reference manual for possible USART frame formats.

      (++) USART polarity

      (++) USART phase

      (++) USART LastBit

      (++) Receiver/transmitter modes

  [..]

    The HAL_USART_Init() function follows the USART  synchronous configuration

    procedures (details for the procedures are available in reference manual (RM0038)).

@endverbatim

  * @{

  */

/**

  * @brief  Initialize the USART mode according to the specified

  *         parameters in the USART_InitTypeDef and initialize the associated handle.

  * @param  husart Pointer to a USART_HandleTypeDef structure that contains

  *                the configuration information for the specified USART module.

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_USART_Init(USART_HandleTypeDef *husart)

{

  /* Check the USART handle allocation */

  if (husart == NULL)

  {

    return HAL_ERROR;

  }

  /* Check the parameters */

  assert_param(IS_USART_INSTANCE(husart->Instance));

  if (husart->State == HAL_USART_STATE_RESET)

  {

    /* Allocate lock resource and initialize it */

    husart->Lock = HAL_UNLOCKED;

#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)

    USART_InitCallbacksToDefault(husart);

    if (husart->MspInitCallback == NULL)

    {

      husart->MspInitCallback = HAL_USART_MspInit;

    }

    /* Init the low level hardware */

    husart->MspInitCallback(husart);

#else

    /* Init the low level hardware : GPIO, CLOCK */

    HAL_USART_MspInit(husart);

#endif /* USE_HAL_USART_REGISTER_CALLBACKS */

  }

  husart->State = HAL_USART_STATE_BUSY;

  /* Set the USART Communication parameters */

  USART_SetConfig(husart);

  /* In USART mode, the following bits must be kept cleared:

     - LINEN bit in the USART_CR2 register

     - HDSEL, SCEN and IREN bits in the USART_CR3 register */

  CLEAR_BIT(husart->Instance->CR2, USART_CR2_LINEN);

  CLEAR_BIT(husart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN));

  /* Enable the Peripheral */

  __HAL_USART_ENABLE(husart);

  /* Initialize the USART state */

  husart->ErrorCode = HAL_USART_ERROR_NONE;

  husart->State = HAL_USART_STATE_READY;

  return HAL_OK;

}

/**

  * @brief  DeInitializes the USART peripheral.

  * @param  husart Pointer to a USART_HandleTypeDef structure that contains

  *                the configuration information for the specified USART module.

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_USART_DeInit(USART_HandleTypeDef *husart)

{

  /* Check the USART handle allocation */

  if (husart == NULL)

  {

    return HAL_ERROR;

  }

  /* Check the parameters */

  assert_param(IS_USART_INSTANCE(husart->Instance));

  husart->State = HAL_USART_STATE_BUSY;

  /* Disable the Peripheral */

  __HAL_USART_DISABLE(husart);

#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)

  if (husart->MspDeInitCallback == NULL)

  {

    husart->MspDeInitCallback = HAL_USART_MspDeInit;

  }

  /* DeInit the low level hardware */

  husart->MspDeInitCallback(husart);

#else

  /* DeInit the low level hardware */

  HAL_USART_MspDeInit(husart);

#endif /* USE_HAL_USART_REGISTER_CALLBACKS */

  husart->ErrorCode = HAL_USART_ERROR_NONE;

  husart->State = HAL_USART_STATE_RESET;

  /* Release Lock */

  __HAL_UNLOCK(husart);

  return HAL_OK;

}

/**

  * @brief  USART MSP Init.

  * @param  husart Pointer to a USART_HandleTypeDef structure that contains

  *                the configuration information for the specified USART module.

  * @retval None

  */

__weak void HAL_USART_MspInit(USART_HandleTypeDef *husart)

{

  /* Prevent unused argument(s) compilation warning */

  UNUSED(husart);

  /* NOTE: This function should not be modified, when the callback is needed,

           the HAL_USART_MspInit could be implemented in the user file

   */

}

/**

  * @brief  USART MSP DeInit.

  * @param  husart Pointer to a USART_HandleTypeDef structure that contains

  *                the configuration information for the specified USART module.

  * @retval None

  */

__weak void HAL_USART_MspDeInit(USART_HandleTypeDef *husart)

{

  /* Prevent unused argument(s) compilation warning */

  UNUSED(husart);

  /* NOTE: This function should not be modified, when the callback is needed,

           the HAL_USART_MspDeInit could be implemented in the user file

   */

}

#if (USE_HAL_USART_REGISTER_CALLBACKS == 1)

/**

  * @brief  Register a User USART Callback

  *         To be used instead of the weak predefined callback

  * @param  husart usart handle

  * @param  CallbackID ID of the callback to be registered

  *         This parameter can be one of the following values:

  *           @arg @ref HAL_USART_TX_HALFCOMPLETE_CB_ID Tx Half Complete Callback ID

  *           @arg @ref HAL_USART_TX_COMPLETE_CB_ID Tx Complete Callback ID

  *           @arg @ref HAL_USART_RX_HALFCOMPLETE_CB_ID Rx Half Complete Callback ID

  *           @arg @ref HAL_USART_RX_COMPLETE_CB_ID Rx Complete Callback ID

  *           @arg @ref HAL_USART_TX_RX_COMPLETE_CB_ID Rx Complete Callback ID

  *           @arg @ref HAL_USART_ERROR_CB_ID Error Callback ID

  *           @arg @ref HAL_USART_ABORT_COMPLETE_CB_ID Abort Complete Callback ID

  *           @arg @ref HAL_USART_MSPINIT_CB_ID MspInit Callback ID

  *           @arg @ref HAL_USART_MSPDEINIT_CB_ID MspDeInit Callback ID

  * @param  pCallback pointer to the Callback function

  * @retval HAL status

+  */

HAL_StatusTypeDef HAL_USART_RegisterCallback(USART_HandleTypeDef *husart, HAL_USART_CallbackIDTypeDef CallbackID, pUSART_CallbackTypeDef pCallback)

{

  HAL_StatusTypeDef status = HAL_OK;

  if (pCallback == NULL)

  {

    /* Update the error code */

    husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;

    return HAL_ERROR;

  }

  /* Process locked */

  __HAL_LOCK(husart);

  if (husart->State == HAL_USART_STATE_READY)

  {

    switch (CallbackID)

    {

      case HAL_USART_TX_HALFCOMPLETE_CB_ID :

        husart->TxHalfCpltCallback = pCallback;

        break;

      case HAL_USART_TX_COMPLETE_CB_ID :

        husart->TxCpltCallback = pCallback;

        break;

      case HAL_USART_RX_HALFCOMPLETE_CB_ID :

        husart->RxHalfCpltCallback = pCallback;

        break;

      case HAL_USART_RX_COMPLETE_CB_ID :

        husart->RxCpltCallback = pCallback;

        break;

      case HAL_USART_TX_RX_COMPLETE_CB_ID :

        husart->TxRxCpltCallback = pCallback;

        break;

      case HAL_USART_ERROR_CB_ID :

        husart->ErrorCallback = pCallback;

        break;

      case HAL_USART_ABORT_COMPLETE_CB_ID :

        husart->AbortCpltCallback = pCallback;

        break;

      case HAL_USART_MSPINIT_CB_ID :

        husart->MspInitCallback = pCallback;

        break;

      case HAL_USART_MSPDEINIT_CB_ID :

        husart->MspDeInitCallback = pCallback;

        break;

      default :

        /* Update the error code */

        husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;

        /* Return error status */

        status =  HAL_ERROR;

        break;

    }

  }

  else if (husart->State == HAL_USART_STATE_RESET)

  {

    switch (CallbackID)

    {

      case HAL_USART_MSPINIT_CB_ID :

        husart->MspInitCallback = pCallback;

        break;

      case HAL_USART_MSPDEINIT_CB_ID :

        husart->MspDeInitCallback = pCallback;

        break;

      default :

        /* Update the error code */

        husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;

        /* Return error status */

        status =  HAL_ERROR;

        break;

    }

  }

  else

  {

    /* Update the error code */

    husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;

    /* Return error status */

    status =  HAL_ERROR;

  }

  /* Release Lock */

  __HAL_UNLOCK(husart);

  return status;

}

/**

  * @brief  Unregister an USART Callback

  *         USART callaback is redirected to the weak predefined callback

  * @param  husart usart handle

  * @param  CallbackID ID of the callback to be unregistered

  *         This parameter can be one of the following values:

  *           @arg @ref HAL_USART_TX_HALFCOMPLETE_CB_ID Tx Half Complete Callback ID

  *           @arg @ref HAL_USART_TX_COMPLETE_CB_ID Tx Complete Callback ID

  *           @arg @ref HAL_USART_RX_HALFCOMPLETE_CB_ID Rx Half Complete Callback ID

  *           @arg @ref HAL_USART_RX_COMPLETE_CB_ID Rx Complete Callback ID

  *           @arg @ref HAL_USART_TX_RX_COMPLETE_CB_ID Rx Complete Callback ID

  *           @arg @ref HAL_USART_ERROR_CB_ID Error Callback ID

  *           @arg @ref HAL_USART_ABORT_COMPLETE_CB_ID Abort Complete Callback ID

  *           @arg @ref HAL_USART_MSPINIT_CB_ID MspInit Callback ID

  *           @arg @ref HAL_USART_MSPDEINIT_CB_ID MspDeInit Callback ID

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_USART_UnRegisterCallback(USART_HandleTypeDef *husart, HAL_USART_CallbackIDTypeDef CallbackID)

{

  HAL_StatusTypeDef status = HAL_OK;

  /* Process locked */

  __HAL_LOCK(husart);

  if (husart->State == HAL_USART_STATE_READY)

  {

    switch (CallbackID)

    {

      case HAL_USART_TX_HALFCOMPLETE_CB_ID :

        husart->TxHalfCpltCallback = HAL_USART_TxHalfCpltCallback;               /* Legacy weak  TxHalfCpltCallback       */

        break;

      case HAL_USART_TX_COMPLETE_CB_ID :

        husart->TxCpltCallback = HAL_USART_TxCpltCallback;                       /* Legacy weak TxCpltCallback            */

        break;

      case HAL_USART_RX_HALFCOMPLETE_CB_ID :

        husart->RxHalfCpltCallback = HAL_USART_RxHalfCpltCallback;               /* Legacy weak RxHalfCpltCallback        */

        break;

      case HAL_USART_RX_COMPLETE_CB_ID :

        husart->RxCpltCallback = HAL_USART_RxCpltCallback;                       /* Legacy weak RxCpltCallback            */

        break;

      case HAL_USART_TX_RX_COMPLETE_CB_ID :

        husart->TxRxCpltCallback = HAL_USART_TxRxCpltCallback;                   /* Legacy weak TxRxCpltCallback            */

        break;

      case HAL_USART_ERROR_CB_ID :

        husart->ErrorCallback = HAL_USART_ErrorCallback;                         /* Legacy weak ErrorCallback             */

        break;

      case HAL_USART_ABORT_COMPLETE_CB_ID :

        husart->AbortCpltCallback = HAL_USART_AbortCpltCallback;                 /* Legacy weak AbortCpltCallback         */

        break;

      case HAL_USART_MSPINIT_CB_ID :

        husart->MspInitCallback = HAL_USART_MspInit;                             /* Legacy weak MspInitCallback           */

        break;

      case HAL_USART_MSPDEINIT_CB_ID :

        husart->MspDeInitCallback = HAL_USART_MspDeInit;                         /* Legacy weak MspDeInitCallback         */

        break;

      default :

        /* Update the error code */

        husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;

        /* Return error status */

        status =  HAL_ERROR;

        break;

    }

  }

  else if (husart->State == HAL_USART_STATE_RESET)

  {

    switch (CallbackID)

    {

      case HAL_USART_MSPINIT_CB_ID :

        husart->MspInitCallback = HAL_USART_MspInit;

        break;

      case HAL_USART_MSPDEINIT_CB_ID :

        husart->MspDeInitCallback = HAL_USART_MspDeInit;

        break;

      default :

        /* Update the error code */

        husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;

        /* Return error status */

        status =  HAL_ERROR;

        break;

    }

  }

  else

  {

    /* Update the error code */

    husart->ErrorCode |= HAL_USART_ERROR_INVALID_CALLBACK;

    /* Return error status */

    status =  HAL_ERROR;

  }

  /* Release Lock */

  __HAL_UNLOCK(husart);

  return status;

}

#endif /* USE_HAL_USART_REGISTER_CALLBACKS */

/**

  * @}

  */

/** @defgroup USART_Exported_Functions_Group2 IO operation functions

  *  @brief   USART Transmit and Receive functions

  *

@verbatim

  ==============================================================================

                         ##### IO operation functions #####

  ==============================================================================

  [..]

    This subsection provides a set of functions allowing to manage the USART synchronous

    data transfers.

  [..]

    The USART supports master mode only: it cannot receive or send data related to an input

    clock (SCLK is always an output).

    (#) There are two modes 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.

        (++) No-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 USART IRQ when using Interrupt mode or the DMA IRQ when

             using DMA mode.

             The HAL_USART_TxCpltCallback(), HAL_USART_RxCpltCallback() and HAL_USART_TxRxCpltCallback()

              user callbacks

             will be executed respectively at the end of the transmit or Receive process

             The HAL_USART_ErrorCallback() user callback will be executed when a communication

             error is detected

    (#) Blocking mode APIs are :

        (++) HAL_USART_Transmit() in simplex mode

        (++) HAL_USART_Receive() in full duplex receive only

        (++) HAL_USART_TransmitReceive() in full duplex mode

    (#) Non Blocking mode APIs with Interrupt are :

        (++) HAL_USART_Transmit_IT()in simplex mode

        (++) HAL_USART_Receive_IT() in full duplex receive only

        (++) HAL_USART_TransmitReceive_IT() in full duplex mode

        (++) HAL_USART_IRQHandler()

    (#) Non Blocking mode functions with DMA are :

        (++) HAL_USART_Transmit_DMA()in simplex mode

        (++) HAL_USART_Receive_DMA() in full duplex receive only

        (++) HAL_USART_TransmitReceive_DMA() in full duplex mode

        (++) HAL_USART_DMAPause()

        (++) HAL_USART_DMAResume()

        (++) HAL_USART_DMAStop()

    (#) A set of Transfer Complete Callbacks are provided in non Blocking mode:

        (++) HAL_USART_TxHalfCpltCallback()

        (++) HAL_USART_TxCpltCallback()

        (++) HAL_USART_RxHalfCpltCallback()

        (++) HAL_USART_RxCpltCallback()

        (++) HAL_USART_ErrorCallback()

        (++) HAL_USART_TxRxCpltCallback()

    (#) Non-Blocking mode transfers could be aborted using Abort API's :

        (++) HAL_USART_Abort()

        (++) HAL_USART_Abort_IT()

    (#) For Abort services based on interrupts (HAL_USART_Abort_IT), a Abort Complete Callbacks is provided:

        (++) HAL_USART_AbortCpltCallback()

    (#) 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_USART_ErrorCallback() user callback is executed. Transfer is kept ongoing on USART 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_USART_ErrorCallback() user callback is executed.

@endverbatim

  * @{

  */

/**

  * @brief  Simplex Send an amount of data in blocking mode.

  * @note   When USART parity is not enabled (PCE = 0), and Word Length is configured to 9 bits (M1-M0 = 01),

  *         the sent data is handled as a set of u16. In this case, Size must indicate the number

  *         of u16 provided through pTxData.

  * @param  husart  Pointer to a USART_HandleTypeDef structure that contains

  *                 the configuration information for the specified USART module.

  * @param  pTxData Pointer to data buffer (u8 or u16 data elements).

  * @param  Size    Amount of data elements (u8 or u16) to be sent.

  * @param  Timeout Timeout duration.

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_USART_Transmit(USART_HandleTypeDef *husart, uint8_t *pTxData, uint16_t Size, uint32_t Timeout)

{

  uint16_t *tmp;

  uint32_t tickstart = 0U;

  if (husart->State == HAL_USART_STATE_READY)

  {

    if ((pTxData == NULL) || (Size == 0))

    {

      return  HAL_ERROR;

    }

    /* Process Locked */

    __HAL_LOCK(husart);

    husart->ErrorCode = HAL_USART_ERROR_NONE;

    husart->State = HAL_USART_STATE_BUSY_TX;

    /* Init tickstart for timeout management */

    tickstart = HAL_GetTick();

    husart->TxXferSize = Size;

    husart->TxXferCount = Size;

    while (husart->TxXferCount > 0U)

    {

      husart->TxXferCount--;

      if (husart->Init.WordLength == USART_WORDLENGTH_9B)

      {

        /* Wait for TC flag in order to write data in DR */

        if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)

        {

          return HAL_TIMEOUT;

        }

        tmp = (uint16_t *) pTxData;

        husart->Instance->DR = (*tmp & (uint16_t)0x01FF);

        if (husart->Init.Parity == USART_PARITY_NONE)

        {

          pTxData += 2U;

        }

        else

        {

          pTxData += 1U;

        }

      }

      else

      {

        if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)

        {

          return HAL_TIMEOUT;

        }

        husart->Instance->DR = (*pTxData++ & (uint8_t)0xFF);

      }

    }

    if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TC, RESET, tickstart, Timeout) != HAL_OK)

    {

      return HAL_TIMEOUT;

    }

    husart->State = HAL_USART_STATE_READY;

    /* Process Unlocked */

    __HAL_UNLOCK(husart);

    return HAL_OK;

  }

  else

  {

    return HAL_BUSY;

  }

}

/**

  * @brief  Full-Duplex Receive an amount of data in blocking mode.

  * @note   To receive synchronous data, dummy data are simultaneously transmitted.

  * @note   When USART 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 u16. In this case, Size must indicate the number

  *         of u16 available through pRxData.

  * @param  husart  Pointer to a USART_HandleTypeDef structure that contains

  *                 the configuration information for the specified USART module.

  * @param  pRxData Pointer to data buffer (u8 or u16 data elements).

  * @param  Size    Amount of data elements (u8 or u16) to be received.

  * @param  Timeout Timeout duration.

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_USART_Receive(USART_HandleTypeDef *husart, uint8_t *pRxData, uint16_t Size, uint32_t Timeout)

{

  uint16_t *tmp;

  uint32_t tickstart = 0U;

  if (husart->State == HAL_USART_STATE_READY)

  {

    if ((pRxData == NULL) || (Size == 0))

    {

      return  HAL_ERROR;

    }

    /* Process Locked */

    __HAL_LOCK(husart);

    husart->ErrorCode = HAL_USART_ERROR_NONE;

    husart->State = HAL_USART_STATE_BUSY_RX;

    /* Init tickstart for timeout management */

    tickstart = HAL_GetTick();

    husart->RxXferSize = Size;

    husart->RxXferCount = Size;

    /* Check the remain data to be received */

    while (husart->RxXferCount > 0U)

    {

      husart->RxXferCount--;

      if (husart->Init.WordLength == USART_WORDLENGTH_9B)

      {

        /* Wait until TXE flag is set to send dummy byte in order to generate the clock for the slave to send data */

        if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)

        {

          return HAL_TIMEOUT;

        }

        /* Send dummy byte in order to generate clock */

        husart->Instance->DR = (DUMMY_DATA & (uint16_t)0x01FF);

        /* Wait for RXNE Flag */

        if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)

        {

          return HAL_TIMEOUT;

        }

        tmp = (uint16_t *) pRxData ;

        if (husart->Init.Parity == USART_PARITY_NONE)

        {

          *tmp = (uint16_t)(husart->Instance->DR & (uint16_t)0x01FF);

          pRxData += 2U;

        }

        else

        {

          *tmp = (uint16_t)(husart->Instance->DR & (uint16_t)0x00FF);

          pRxData += 1U;

        }

      }

      else

      {

        /* Wait until TXE flag is set to send dummy byte in order to generate the clock for the slave to send data */

        if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)

        {

          return HAL_TIMEOUT;

        }

        /* Send Dummy Byte in order to generate clock */

        husart->Instance->DR = (DUMMY_DATA & (uint16_t)0x00FF);

        /* Wait until RXNE flag is set to receive the byte */

        if (USART_WaitOnFlagUntilTimeout(husart, USART_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)

        {

          return HAL_TIMEOUT;

        }

        if (husart->Init.Parity == USART_PARITY_NONE)

        {

          /* Receive data */

          *pRxData++ = (uint8_t)(husart->Instance->DR & (uint8_t)0x00FF);

        }

        else

        {

          /* Receive data */

          *pRxData++ = (uint8_t)(husart->Instance->DR & (uint8_t)0x007F);

        }

      }

    }

    husart->State = HAL_USART_STATE_READY;

    /* Process Unlocked */

    __HAL_UNLOCK(husart);

    return HAL_OK;