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/**

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

  * @file    stm32f1xx_hal_irda.c

  * @author  MCD Application Team

  * @brief   IRDA HAL module driver.

  *          This file provides firmware functions to manage the following

  *          functionalities of the IrDA SIR ENDEC block (IrDA):

  *           + Initialization and de-initialization functions

  *           + IO operation functions

  *           + Peripheral Control functions

  *           + Peripheral State and Errors functions

  *

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

  * @attention

  *

  * Copyright (c) 2016 STMicroelectronics.

  * All rights reserved.

  *

  * This software is licensed under terms that can be found in the LICENSE file

  * in the root directory of this software component.

  * If no LICENSE file comes with this software, it is provided AS-IS.

  *

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

  @verbatim

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

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

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

  [..]

    The IRDA HAL driver can be used as follows:

    (#) Declare a IRDA_HandleTypeDef handle structure (eg. IRDA_HandleTypeDef hirda).

    (#) Initialize the IRDA low level resources by implementing the HAL_IRDA_MspInit() API:

        (##) Enable the USARTx interface clock.

        (##) IRDA pins configuration:

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

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

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

             and HAL_IRDA_Receive_IT() APIs):

            (+++) Configure the USARTx interrupt priority.

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

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

             and HAL_IRDA_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 IRDA DMA Tx/Rx handle.

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

            (+++) Configure the IRDAx 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, Parity, IrDA Mode, Prescaler

        and Mode(Receiver/Transmitter) in the hirda Init structure.

    (#) Initialize the IRDA registers by calling the HAL_IRDA_Init() API:

        (++) This API configures also the low level Hardware GPIO, CLOCK, CORTEX...etc)

             by calling the customized HAL_IRDA_MspInit() API.

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

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

             __HAL_IRDA_ENABLE_IT() and __HAL_IRDA_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_IRDA_Transmit()

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

    *** Interrupt mode IO operation ***

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

    [..]

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

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

           add his own code by customization of function pointer HAL_IRDA_TxCpltCallback

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

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

           add his own code by customization of function pointer HAL_IRDA_RxCpltCallback

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

           add his own code by customization of function pointer HAL_IRDA_ErrorCallback

    *** DMA mode IO operation ***

    =============================

    [..]

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

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

            add his own code by customization of function pointer HAL_IRDA_TxHalfCpltCallback

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

           add his own code by customization of function pointer HAL_IRDA_TxCpltCallback

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

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

            add his own code by customization of function pointer HAL_IRDA_RxHalfCpltCallback

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

           add his own code by customization of function pointer HAL_IRDA_RxCpltCallback

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

           add his own code by customization of function pointer HAL_IRDA_ErrorCallback

      (+) Pause the DMA Transfer using HAL_IRDA_DMAPause()

      (+) Resume the DMA Transfer using HAL_IRDA_DMAResume()

      (+) Stop the DMA Transfer using HAL_IRDA_DMAStop()

    *** IRDA HAL driver macros list ***

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

    [..]

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

       (+) __HAL_IRDA_ENABLE: Enable the IRDA peripheral

       (+) __HAL_IRDA_DISABLE: Disable the IRDA peripheral

       (+) __HAL_IRDA_GET_FLAG : Check whether the specified IRDA flag is set or not

       (+) __HAL_IRDA_CLEAR_FLAG : Clear the specified IRDA pending flag

       (+) __HAL_IRDA_ENABLE_IT: Enable the specified IRDA interrupt

       (+) __HAL_IRDA_DISABLE_IT: Disable the specified IRDA interrupt

       (+) __HAL_IRDA_GET_IT_SOURCE: Check whether the specified IRDA interrupt has occurred or not

    [..]

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

    ##### Callback registration #####

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

    [..]

      The compilation define USE_HAL_IRDA_REGISTER_CALLBACKS when set to 1

      allows the user to configure dynamically the driver callbacks.

    [..]

      Use Function HAL_IRDA_RegisterCallback() to register a user callback.

      Function HAL_IRDA_RegisterCallback() allows to register following callbacks:

       (+) TxHalfCpltCallback        : Tx Half Complete Callback.

       (+) TxCpltCallback            : Tx Complete Callback.

       (+) RxHalfCpltCallback        : Rx Half Complete Callback.

       (+) RxCpltCallback            : Rx Complete Callback.

       (+) ErrorCallback             : Error Callback.

       (+) AbortCpltCallback         : Abort Complete Callback.

       (+) AbortTransmitCpltCallback : Abort Transmit Complete Callback.

       (+) AbortReceiveCpltCallback  : Abort Receive Complete Callback.

       (+) MspInitCallback           : IRDA MspInit.

       (+) MspDeInitCallback         : IRDA MspDeInit.

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

      and a pointer to the user callback function.

    [..]

      Use function HAL_IRDA_UnRegisterCallback() to reset a callback to the default

      weak (surcharged) function.

      HAL_IRDA_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.

       (+) ErrorCallback             : Error Callback.

       (+) AbortCpltCallback         : Abort Complete Callback.

       (+) AbortTransmitCpltCallback : Abort Transmit Complete Callback.

       (+) AbortReceiveCpltCallback  : Abort Receive Complete Callback.

       (+) MspInitCallback           : IRDA MspInit.

       (+) MspDeInitCallback         : IRDA MspDeInit.

    [..]

      By default, after the HAL_IRDA_Init() and when the state is HAL_IRDA_STATE_RESET

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

      examples HAL_IRDA_TxCpltCallback(), HAL_IRDA_RxHalfCpltCallback().

      Exception done for MspInit and MspDeInit functions that are respectively

      reset to the legacy weak (surcharged) functions in the HAL_IRDA_Init()

      and HAL_IRDA_DeInit() only when these callbacks are null (not registered beforehand).

      If not, MspInit or MspDeInit are not null, the HAL_IRDA_Init() and HAL_IRDA_DeInit()

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

    [..]

      Callbacks can be registered/unregistered in HAL_IRDA_STATE_READY state only.

      Exception done MspInit/MspDeInit that can be registered/unregistered

      in HAL_IRDA_STATE_READY or HAL_IRDA_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 HAL_IRDA_RegisterCallback() before calling HAL_IRDA_DeInit()

      or HAL_IRDA_Init() function.

    [..]

      When The compilation define USE_HAL_IRDA_REGISTER_CALLBACKS is set to 0 or

      not defined, the callback registration feature is not available

      and weak (surcharged) callbacks are used.

  @endverbatim

     [..]

       (@) Additional 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 IRDA frame formats are as listed in the following table:

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

    |   M bit |  PCE bit  |            IRDA frame                 |

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

    |    0    |    0      |    | SB | 8 bit data | 1 STB |        |

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

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

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

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

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

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

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

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

  */

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

#include "stm32f1xx_hal.h"

/** @addtogroup STM32F1xx_HAL_Driver

  * @{

  */

/** @defgroup IRDA IRDA

  * @brief HAL IRDA module driver

  * @{

  */

#ifdef HAL_IRDA_MODULE_ENABLED

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

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

/* Private constants ---------------------------------------------------------*/

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

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

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

/** @addtogroup IRDA_Private_Functions

  * @{

  */

#if (USE_HAL_IRDA_REGISTER_CALLBACKS == 1)

void IRDA_InitCallbacksToDefault(IRDA_HandleTypeDef *hirda);

#endif /* USE_HAL_IRDA_REGISTER_CALLBACKS */

static void IRDA_SetConfig(IRDA_HandleTypeDef *hirda);

static HAL_StatusTypeDef IRDA_Transmit_IT(IRDA_HandleTypeDef *hirda);

static HAL_StatusTypeDef IRDA_EndTransmit_IT(IRDA_HandleTypeDef *hirda);

static HAL_StatusTypeDef IRDA_Receive_IT(IRDA_HandleTypeDef *hirda);

static void IRDA_DMATransmitCplt(DMA_HandleTypeDef *hdma);

static void IRDA_DMATransmitHalfCplt(DMA_HandleTypeDef *hdma);

static void IRDA_DMAReceiveCplt(DMA_HandleTypeDef *hdma);

static void IRDA_DMAReceiveHalfCplt(DMA_HandleTypeDef *hdma);

static void IRDA_DMAError(DMA_HandleTypeDef *hdma);

static void IRDA_DMAAbortOnError(DMA_HandleTypeDef *hdma);

static void IRDA_DMATxAbortCallback(DMA_HandleTypeDef *hdma);

static void IRDA_DMARxAbortCallback(DMA_HandleTypeDef *hdma);

static void IRDA_DMATxOnlyAbortCallback(DMA_HandleTypeDef *hdma);

static void IRDA_DMARxOnlyAbortCallback(DMA_HandleTypeDef *hdma);

static HAL_StatusTypeDef IRDA_WaitOnFlagUntilTimeout(IRDA_HandleTypeDef *hirda, uint32_t Flag, FlagStatus Status, uint32_t Tickstart, uint32_t Timeout);

static void IRDA_EndTxTransfer(IRDA_HandleTypeDef *hirda);

static void IRDA_EndRxTransfer(IRDA_HandleTypeDef *hirda);

/**

  * @}

  */

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

/** @defgroup IRDA_Exported_Functions IrDA Exported Functions

  * @{

  */

/** @defgroup IRDA_Exported_Functions_Group1 IrDA 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 IrDA mode.

      (+) For the asynchronous mode only these parameters can be configured:

        (++) BaudRate

        (++) WordLength

        (++) 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 IRDA frame formats.

        (++) Prescaler: A pulse of width less than two and greater than one PSC period(s) may or may

             not be rejected. The receiver set up time should be managed by software. The IrDA physical layer

             specification specifies a minimum of 10 ms delay between transmission and

             reception (IrDA is a half duplex protocol).

        (++) Mode: Receiver/transmitter modes

        (++) IrDAMode: the IrDA can operate in the Normal mode or in the Low power mode.

    [..]

    The HAL_IRDA_Init() API follows IRDA configuration procedures (details for the procedures

    are available in reference manual).

@endverbatim

  * @{

  */

/**

  * @brief  Initializes the IRDA mode according to the specified

  *         parameters in the IRDA_InitTypeDef and create the associated handle.

  * @param  hirda  Pointer to a IRDA_HandleTypeDef structure that contains

  *                the configuration information for the specified IRDA module.

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_IRDA_Init(IRDA_HandleTypeDef *hirda)

{

  /* Check the IRDA handle allocation */

  if (hirda == NULL)

  {

    return HAL_ERROR;

  }

  /* Check the IRDA instance parameters */

  assert_param(IS_IRDA_INSTANCE(hirda->Instance));

  /* Check the IRDA mode parameter in the IRDA handle */

  assert_param(IS_IRDA_POWERMODE(hirda->Init.IrDAMode));

  if (hirda->gState == HAL_IRDA_STATE_RESET)

  {

    /* Allocate lock resource and initialize it */

    hirda->Lock = HAL_UNLOCKED;

#if USE_HAL_IRDA_REGISTER_CALLBACKS == 1

    IRDA_InitCallbacksToDefault(hirda);

    if (hirda->MspInitCallback == NULL)

    {

      hirda->MspInitCallback = HAL_IRDA_MspInit;

    }

    /* Init the low level hardware */

    hirda->MspInitCallback(hirda);

#else

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

    HAL_IRDA_MspInit(hirda);

#endif /* USE_HAL_IRDA_REGISTER_CALLBACKS */

  }

  hirda->gState = HAL_IRDA_STATE_BUSY;

  /* Disable the IRDA peripheral */

  __HAL_IRDA_DISABLE(hirda);

  /* Set the IRDA communication parameters */

  IRDA_SetConfig(hirda);

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

  - LINEN, STOP and CLKEN bits in the USART_CR2 register,

  - SCEN and HDSEL bits in the USART_CR3 register.*/

  CLEAR_BIT(hirda->Instance->CR2, (USART_CR2_LINEN | USART_CR2_STOP | USART_CR2_CLKEN));

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

  /* Enable the IRDA peripheral */

  __HAL_IRDA_ENABLE(hirda);

  /* Set the prescaler */

  MODIFY_REG(hirda->Instance->GTPR, USART_GTPR_PSC, hirda->Init.Prescaler);

  /* Configure the IrDA mode */

  MODIFY_REG(hirda->Instance->CR3, USART_CR3_IRLP, hirda->Init.IrDAMode);

  /* Enable the IrDA mode by setting the IREN bit in the CR3 register */

  SET_BIT(hirda->Instance->CR3, USART_CR3_IREN);

  /* Initialize the IRDA state*/

  hirda->ErrorCode = HAL_IRDA_ERROR_NONE;

  hirda->gState = HAL_IRDA_STATE_READY;

  hirda->RxState = HAL_IRDA_STATE_READY;

  return HAL_OK;

}

/**

  * @brief  DeInitializes the IRDA peripheral

  * @param  hirda  Pointer to a IRDA_HandleTypeDef structure that contains

  *                the configuration information for the specified IRDA module.

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_IRDA_DeInit(IRDA_HandleTypeDef *hirda)

{

  /* Check the IRDA handle allocation */

  if (hirda == NULL)

  {

    return HAL_ERROR;

  }

  /* Check the parameters */

  assert_param(IS_IRDA_INSTANCE(hirda->Instance));

  hirda->gState = HAL_IRDA_STATE_BUSY;

  /* Disable the Peripheral */

  __HAL_IRDA_DISABLE(hirda);

  /* DeInit the low level hardware */

#if USE_HAL_IRDA_REGISTER_CALLBACKS == 1

  if (hirda->MspDeInitCallback == NULL)

  {

    hirda->MspDeInitCallback = HAL_IRDA_MspDeInit;

  }

  /* DeInit the low level hardware */

  hirda->MspDeInitCallback(hirda);

#else

  HAL_IRDA_MspDeInit(hirda);

#endif /* USE_HAL_IRDA_REGISTER_CALLBACKS */

  hirda->ErrorCode = HAL_IRDA_ERROR_NONE;

  hirda->gState = HAL_IRDA_STATE_RESET;

  hirda->RxState = HAL_IRDA_STATE_RESET;

  /* Release Lock */

  __HAL_UNLOCK(hirda);

  return HAL_OK;

}

/**

  * @brief  IRDA MSP Init.

  * @param  hirda  Pointer to a IRDA_HandleTypeDef structure that contains

  *                the configuration information for the specified IRDA module.

  * @retval None

  */

__weak void HAL_IRDA_MspInit(IRDA_HandleTypeDef *hirda)

{

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

  UNUSED(hirda);

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

           the HAL_IRDA_MspInit can be implemented in the user file

   */

}

/**

  * @brief  IRDA MSP DeInit.

  * @param  hirda  Pointer to a IRDA_HandleTypeDef structure that contains

  *                the configuration information for the specified IRDA module.

  * @retval None

  */

__weak void HAL_IRDA_MspDeInit(IRDA_HandleTypeDef *hirda)

{

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

  UNUSED(hirda);

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

           the HAL_IRDA_MspDeInit can be implemented in the user file

   */

}

#if (USE_HAL_IRDA_REGISTER_CALLBACKS == 1)

/**

  * @brief  Register a User IRDA Callback

  *         To be used instead of the weak predefined callback

  * @note   The HAL_IRDA_RegisterCallback() may be called before HAL_IRDA_Init() in HAL_IRDA_STATE_RESET

  *         to register callbacks for HAL_IRDA_MSPINIT_CB_ID and HAL_IRDA_MSPDEINIT_CB_ID

  * @param  hirda irda handle

  * @param  CallbackID ID of the callback to be registered

  *         This parameter can be one of the following values:

  *           @arg @ref HAL_IRDA_TX_HALFCOMPLETE_CB_ID Tx Half Complete Callback ID

  *           @arg @ref HAL_IRDA_TX_COMPLETE_CB_ID Tx Complete Callback ID

  *           @arg @ref HAL_IRDA_RX_HALFCOMPLETE_CB_ID Rx Half Complete Callback ID

  *           @arg @ref HAL_IRDA_RX_COMPLETE_CB_ID Rx Complete Callback ID

  *           @arg @ref HAL_IRDA_ERROR_CB_ID Error Callback ID

  *           @arg @ref HAL_IRDA_ABORT_COMPLETE_CB_ID Abort Complete Callback ID

  *           @arg @ref HAL_IRDA_ABORT_TRANSMIT_COMPLETE_CB_ID Abort Transmit Complete Callback ID

  *           @arg @ref HAL_IRDA_ABORT_RECEIVE_COMPLETE_CB_ID Abort Receive Complete Callback ID

  *           @arg @ref HAL_IRDA_MSPINIT_CB_ID MspInit Callback ID

  *           @arg @ref HAL_IRDA_MSPDEINIT_CB_ID MspDeInit Callback ID

  * @param  pCallback pointer to the Callback function

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_IRDA_RegisterCallback(IRDA_HandleTypeDef *hirda, HAL_IRDA_CallbackIDTypeDef CallbackID, pIRDA_CallbackTypeDef pCallback)

{

  HAL_StatusTypeDef status = HAL_OK;

  if (pCallback == NULL)

  {

    /* Update the error code */

    hirda->ErrorCode |= HAL_IRDA_ERROR_INVALID_CALLBACK;

    return HAL_ERROR;

  }

  if (hirda->gState == HAL_IRDA_STATE_READY)

  {

    switch (CallbackID)

    {

      case HAL_IRDA_TX_HALFCOMPLETE_CB_ID :

        hirda->TxHalfCpltCallback = pCallback;

        break;

      case HAL_IRDA_TX_COMPLETE_CB_ID :

        hirda->TxCpltCallback = pCallback;

        break;

      case HAL_IRDA_RX_HALFCOMPLETE_CB_ID :

        hirda->RxHalfCpltCallback = pCallback;

        break;

      case HAL_IRDA_RX_COMPLETE_CB_ID :

        hirda->RxCpltCallback = pCallback;

        break;

      case HAL_IRDA_ERROR_CB_ID :

        hirda->ErrorCallback = pCallback;

        break;

      case HAL_IRDA_ABORT_COMPLETE_CB_ID :

        hirda->AbortCpltCallback = pCallback;

        break;

      case HAL_IRDA_ABORT_TRANSMIT_COMPLETE_CB_ID :

        hirda->AbortTransmitCpltCallback = pCallback;

        break;

      case HAL_IRDA_ABORT_RECEIVE_COMPLETE_CB_ID :

        hirda->AbortReceiveCpltCallback = pCallback;

        break;

      case HAL_IRDA_MSPINIT_CB_ID :

        hirda->MspInitCallback = pCallback;

        break;

      case HAL_IRDA_MSPDEINIT_CB_ID :

        hirda->MspDeInitCallback = pCallback;

        break;

      default :

        /* Update the error code */

        hirda->ErrorCode |= HAL_IRDA_ERROR_INVALID_CALLBACK;

        /* Return error status */

        status =  HAL_ERROR;

        break;

    }

  }

  else if (hirda->gState == HAL_IRDA_STATE_RESET)

  {

    switch (CallbackID)

    {

      case HAL_IRDA_MSPINIT_CB_ID :

        hirda->MspInitCallback = pCallback;

        break;

      case HAL_IRDA_MSPDEINIT_CB_ID :

        hirda->MspDeInitCallback = pCallback;

        break;

      default :

        /* Update the error code */

        hirda->ErrorCode |= HAL_IRDA_ERROR_INVALID_CALLBACK;

        /* Return error status */

        status =  HAL_ERROR;

        break;

    }

  }

  else

  {

    /* Update the error code */

    hirda->ErrorCode |= HAL_IRDA_ERROR_INVALID_CALLBACK;

    /* Return error status */

    status =  HAL_ERROR;

  }

  return status;

}

/**

  * @brief  Unregister an IRDA callback

  *         IRDA callback is redirected to the weak predefined callback

  * @note   The HAL_IRDA_UnRegisterCallback() may be called before HAL_IRDA_Init() in HAL_IRDA_STATE_RESET

  *         to un-register callbacks for HAL_IRDA_MSPINIT_CB_ID and HAL_IRDA_MSPDEINIT_CB_ID

  * @param  hirda irda handle

  * @param  CallbackID ID of the callback to be unregistered

  *         This parameter can be one of the following values:

  *           @arg @ref HAL_IRDA_TX_HALFCOMPLETE_CB_ID Tx Half Complete Callback ID

  *           @arg @ref HAL_IRDA_TX_COMPLETE_CB_ID Tx Complete Callback ID

  *           @arg @ref HAL_IRDA_RX_HALFCOMPLETE_CB_ID Rx Half Complete Callback ID

  *           @arg @ref HAL_IRDA_RX_COMPLETE_CB_ID Rx Complete Callback ID

  *           @arg @ref HAL_IRDA_ERROR_CB_ID Error Callback ID

  *           @arg @ref HAL_IRDA_ABORT_COMPLETE_CB_ID Abort Complete Callback ID

  *           @arg @ref HAL_IRDA_ABORT_TRANSMIT_COMPLETE_CB_ID Abort Transmit Complete Callback ID

  *           @arg @ref HAL_IRDA_ABORT_RECEIVE_COMPLETE_CB_ID Abort Receive Complete Callback ID

  *           @arg @ref HAL_IRDA_MSPINIT_CB_ID MspInit Callback ID

  *           @arg @ref HAL_IRDA_MSPDEINIT_CB_ID MspDeInit Callback ID

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_IRDA_UnRegisterCallback(IRDA_HandleTypeDef *hirda, HAL_IRDA_CallbackIDTypeDef CallbackID)

{

  HAL_StatusTypeDef status = HAL_OK;

  if (HAL_IRDA_STATE_READY == hirda->gState)

  {

    switch (CallbackID)

    {

      case HAL_IRDA_TX_HALFCOMPLETE_CB_ID :

        hirda->TxHalfCpltCallback = HAL_IRDA_TxHalfCpltCallback;               /* Legacy weak  TxHalfCpltCallback       */

        break;

      case HAL_IRDA_TX_COMPLETE_CB_ID :

        hirda->TxCpltCallback = HAL_IRDA_TxCpltCallback;                       /* Legacy weak TxCpltCallback            */

        break;

      case HAL_IRDA_RX_HALFCOMPLETE_CB_ID :

        hirda->RxHalfCpltCallback = HAL_IRDA_RxHalfCpltCallback;               /* Legacy weak RxHalfCpltCallback        */

        break;

      case HAL_IRDA_RX_COMPLETE_CB_ID :

        hirda->RxCpltCallback = HAL_IRDA_RxCpltCallback;                       /* Legacy weak RxCpltCallback            */

        break;

      case HAL_IRDA_ERROR_CB_ID :

        hirda->ErrorCallback = HAL_IRDA_ErrorCallback;                         /* Legacy weak ErrorCallback             */

        break;

      case HAL_IRDA_ABORT_COMPLETE_CB_ID :

        hirda->AbortCpltCallback = HAL_IRDA_AbortCpltCallback;                 /* Legacy weak AbortCpltCallback         */

        break;

      case HAL_IRDA_ABORT_TRANSMIT_COMPLETE_CB_ID :

        hirda->AbortTransmitCpltCallback = HAL_IRDA_AbortTransmitCpltCallback; /* Legacy weak AbortTransmitCpltCallback */

        break;

      case HAL_IRDA_ABORT_RECEIVE_COMPLETE_CB_ID :

        hirda->AbortReceiveCpltCallback = HAL_IRDA_AbortReceiveCpltCallback;   /* Legacy weak AbortReceiveCpltCallback  */

        break;

      case HAL_IRDA_MSPINIT_CB_ID :

        hirda->MspInitCallback = HAL_IRDA_MspInit;                             /* Legacy weak MspInitCallback           */

        break;

      case HAL_IRDA_MSPDEINIT_CB_ID :

        hirda->MspDeInitCallback = HAL_IRDA_MspDeInit;                         /* Legacy weak MspDeInitCallback         */

        break;

      default :

        /* Update the error code */

        hirda->ErrorCode |= HAL_IRDA_ERROR_INVALID_CALLBACK;

        /* Return error status */

        status =  HAL_ERROR;

        break;

    }

  }

  else if (HAL_IRDA_STATE_RESET == hirda->gState)

  {

    switch (CallbackID)

    {

      case HAL_IRDA_MSPINIT_CB_ID :

        hirda->MspInitCallback = HAL_IRDA_MspInit;

        break;

      case HAL_IRDA_MSPDEINIT_CB_ID :

        hirda->MspDeInitCallback = HAL_IRDA_MspDeInit;

        break;

      default :

        /* Update the error code */

        hirda->ErrorCode |= HAL_IRDA_ERROR_INVALID_CALLBACK;

        /* Return error status */

        status =  HAL_ERROR;

        break;

    }

  }

  else

  {

    /* Update the error code */

    hirda->ErrorCode |= HAL_IRDA_ERROR_INVALID_CALLBACK;

    /* Return error status */

    status =  HAL_ERROR;

  }

  return status;

}

#endif /* USE_HAL_IRDA_REGISTER_CALLBACKS */

/**

  * @}

  */

/** @defgroup IRDA_Exported_Functions_Group2 IO operation functions

  *  @brief   IRDA Transmit and Receive functions

  *

@verbatim

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

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

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

    [..]

    This subsection provides a set of functions allowing to manage the IRDA data transfers.

    IrDA is a half duplex communication protocol. If the Transmitter is busy, any data

    on the IrDA receive line will be ignored by the IrDA decoder and if the Receiver

    is busy, data on the TX from the USART to IrDA will not be encoded by IrDA.

    While receiving data, transmission should be avoided as the data to be transmitted

    could be corrupted.

    (#) 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.

       (++) 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 IRDA IRQ when using Interrupt mode or the DMA IRQ when

           using DMA mode.

           The HAL_IRDA_TxCpltCallback(), HAL_IRDA_RxCpltCallback() user callbacks

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

           The HAL_IRDA_ErrorCallback() user callback will be executed when a communication error is detected

    (#) Blocking mode APIs are :

        (++) HAL_IRDA_Transmit()

        (++) HAL_IRDA_Receive()

    (#) Non Blocking mode APIs with Interrupt are :

        (++) HAL_IRDA_Transmit_IT()

        (++) HAL_IRDA_Receive_IT()

        (++) HAL_IRDA_IRQHandler()

    (#) Non Blocking mode functions with DMA are :

        (++) HAL_IRDA_Transmit_DMA()

        (++) HAL_IRDA_Receive_DMA()

        (++) HAL_IRDA_DMAPause()

        (++) HAL_IRDA_DMAResume()

        (++) HAL_IRDA_DMAStop()

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

        (++) HAL_IRDA_TxHalfCpltCallback()

        (++) HAL_IRDA_TxCpltCallback()

        (++) HAL_IRDA_RxHalfCpltCallback()

        (++) HAL_IRDA_RxCpltCallback()

        (++) HAL_IRDA_ErrorCallback()

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

        (+) HAL_IRDA_Abort()

        (+) HAL_IRDA_AbortTransmit()

        (+) HAL_IRDA_AbortReceive()

        (+) HAL_IRDA_Abort_IT()

        (+) HAL_IRDA_AbortTransmit_IT()

        (+) HAL_IRDA_AbortReceive_IT()

    (#) For Abort services based on interrupts (HAL_IRDA_Abortxxx_IT), a set of Abort Complete Callbacks are provided:

        (+) HAL_IRDA_AbortCpltCallback()

        (+) HAL_IRDA_AbortTransmitCpltCallback()

        (+) HAL_IRDA_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_IRDA_ErrorCallback() user callback is executed. Transfer is kept ongoing on IRDA 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_IRDA_ErrorCallback() user callback is executed.

@endverbatim

  * @{

  */

/**

  * @brief Sends an amount of data in blocking mode.

  * @note  When UART 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 reflect the number

  *        of u16 available through pData.

  * @param hirda Pointer to a IRDA_HandleTypeDef structure that contains

  *              the configuration information for the specified IRDA module.

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

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

  * @param Timeout Specify timeout value.

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_IRDA_Transmit(IRDA_HandleTypeDef *hirda, const uint8_t *pData, uint16_t Size, uint32_t Timeout)

{

  const uint16_t *tmp;

  uint32_t tickstart = 0U;

  /* Check that a Tx process is not already ongoing */

  if (hirda->gState == HAL_IRDA_STATE_READY)

  {

    if ((pData == NULL) || (Size == 0U))

    {

      return  HAL_ERROR;

    }

    /* Process Locked */

    __HAL_LOCK(hirda);

    hirda->ErrorCode = HAL_IRDA_ERROR_NONE;

    hirda->gState = HAL_IRDA_STATE_BUSY_TX;

    /* Init tickstart for timeout management*/

    tickstart = HAL_GetTick();

    hirda->TxXferSize = Size;

    hirda->TxXferCount = Size;

    while (hirda->TxXferCount > 0U)

    {

      hirda->TxXferCount--;

      if (hirda->Init.WordLength == IRDA_WORDLENGTH_9B)

      {

        if (IRDA_WaitOnFlagUntilTimeout(hirda, IRDA_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)

        {

          return HAL_TIMEOUT;

        }

        tmp = (const uint16_t *) pData;

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

        if (hirda->Init.Parity == IRDA_PARITY_NONE)

        {

          pData += 2U;

        }

        else

        {

          pData += 1U;

        }

      }

      else

      {

        if (IRDA_WaitOnFlagUntilTimeout(hirda, IRDA_FLAG_TXE, RESET, tickstart, Timeout) != HAL_OK)

        {

          return HAL_TIMEOUT;

        }

        hirda->Instance->DR = (*pData++ & (uint8_t)0xFF);

      }

    }

    if (IRDA_WaitOnFlagUntilTimeout(hirda, IRDA_FLAG_TC, RESET, tickstart, Timeout) != HAL_OK)

    {

      return HAL_TIMEOUT;

    }

    /* At end of Tx process, restore hirda->gState to Ready */

    hirda->gState = HAL_IRDA_STATE_READY;

    /* Process Unlocked */

    __HAL_UNLOCK(hirda);

    return HAL_OK;

  }

  else

  {

    return HAL_BUSY;

  }

}

/**

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

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

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

  *        of u16 available through pData.

  * @param hirda Pointer to a IRDA_HandleTypeDef structure that contains

  *              the configuration information for the specified IRDA module.

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

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

  * @param Timeout Specify timeout value

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_IRDA_Receive(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size, uint32_t Timeout)

{

  uint16_t *tmp;

  uint32_t tickstart = 0U;

  /* Check that a Rx process is not already ongoing */

  if (hirda->RxState == HAL_IRDA_STATE_READY)

  {

    if ((pData == NULL) || (Size == 0U))

    {

      return  HAL_ERROR;

    }

    /* Process Locked */

    __HAL_LOCK(hirda);

    hirda->ErrorCode = HAL_IRDA_ERROR_NONE;

    hirda->RxState = HAL_IRDA_STATE_BUSY_RX;

    /* Init tickstart for timeout management*/

    tickstart = HAL_GetTick();

    hirda->RxXferSize = Size;

    hirda->RxXferCount = Size;

    /* Check the remain data to be received */

    while (hirda->RxXferCount > 0U)

    {

      hirda->RxXferCount--;

      if (hirda->Init.WordLength == IRDA_WORDLENGTH_9B)

      {

        if (IRDA_WaitOnFlagUntilTimeout(hirda, IRDA_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)

        {

          return HAL_TIMEOUT;

        }

        tmp = (uint16_t *) pData ;

        if (hirda->Init.Parity == IRDA_PARITY_NONE)

        {

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

          pData += 2U;

        }

        else

        {

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

          pData += 1U;

        }

      }

      else

      {

        if (IRDA_WaitOnFlagUntilTimeout(hirda, IRDA_FLAG_RXNE, RESET, tickstart, Timeout) != HAL_OK)

        {

          return HAL_TIMEOUT;

        }

        if (hirda->Init.Parity == IRDA_PARITY_NONE)

        {

          *pData++ = (uint8_t)(hirda->Instance->DR & (uint8_t)0x00FF);

        }

        else

        {

          *pData++ = (uint8_t)(hirda->Instance->DR & (uint8_t)0x007F);

        }

      }

    }

    /* At end of Rx process, restore hirda->RxState to Ready */

    hirda->RxState = HAL_IRDA_STATE_READY;

    /* Process Unlocked */