Subversion Repositories LedShow

/**

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

  * @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  

  @verbatim

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

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

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

  [..]

    The IRDA HAL driver can be used as follows:

    (#) Declare a IRDA_HandleTypeDef handle structure.

    (#) 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 the 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

  @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 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 |     |

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

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

  * @attention

  *

  * <h2><center>&copy; COPYRIGHT(c) 2017 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 "stm32f1xx_hal.h"

/** @addtogroup STM32F1xx_HAL_Driver

  * @{

  */

/** @defgroup IRDA IRDA

  * @brief HAL IRDA module driver

  * @{

  */

#ifdef HAL_IRDA_MODULE_ENABLED

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

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

/** @addtogroup IRDA_Private_Constants

  * @{

  */

/**

  * @}

  */

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

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

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

/** @addtogroup IRDA_Private_Functions

  * @{

  */

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 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 parameters */

  assert_param(IS_IRDA_INSTANCE(hirda->Instance));

  if(hirda->gState == HAL_IRDA_STATE_RESET)

  {

    /* Allocate lock resource and initialize it */

    hirda->Lock = HAL_UNLOCKED;

    /* Init the low level hardware : GPIO, CLOCK, CORTEX...etc */

    HAL_IRDA_MspInit(hirda);

  }

  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 */

  HAL_IRDA_MspDeInit(hirda);

  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

  */

}

/**

  * @}

  */

/** @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.  

        (++) No-Blocking mode: The communication is performed using Interrupts

             or DMA, these APIs 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()

@endverbatim

  * @{

  */

/**

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

  * @param  hirda: Pointer to a IRDA_HandleTypeDef structure that contains

  *                the configuration information for the specified IRDA module.

  * @param  pData: Pointer to data buffer

  * @param  Size: Amount of data to be sent

  * @param  Timeout: Specify timeout value  

  * @retval HAL status

  */

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

{

  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 managment */

    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 = (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.

  * @param  hirda: Pointer to a IRDA_HandleTypeDef structure that contains

  *                the configuration information for the specified IRDA module.

  * @param  pData: Pointer to data buffer

  * @param  Size: Amount of data 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 managment */

    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 */

    __HAL_UNLOCK(hirda);

    return HAL_OK;

  }

  else

  {

    return HAL_BUSY;

  }

}

/**

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

  * @param  hirda: Pointer to a IRDA_HandleTypeDef structure that contains

  *                the configuration information for the specified IRDA module.

  * @param  pData: Pointer to data buffer

  * @param  Size: Amount of data to be sent

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_IRDA_Transmit_IT(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size)

{

  /* 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->pTxBuffPtr = pData;

    hirda->TxXferSize = Size;

    hirda->TxXferCount = Size;

    hirda->ErrorCode = HAL_IRDA_ERROR_NONE;

    hirda->gState = HAL_IRDA_STATE_BUSY_TX;

    /* Process Unlocked */

    __HAL_UNLOCK(hirda);

    /* Enable the IRDA Transmit data register empty Interrupt */

    __HAL_IRDA_ENABLE_IT(hirda, IRDA_IT_TXE);

    return HAL_OK;

  }

  else

  {

    return HAL_BUSY;

  }

}

/**

  * @brief  Receives an amount of data in non blocking mode.

  * @param  hirda: Pointer to a IRDA_HandleTypeDef structure that contains

  *                the configuration information for the specified IRDA module.

  * @param  pData: Pointer to data buffer

  * @param  Size: Amount of data to be received

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_IRDA_Receive_IT(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size)

{

  /* 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->pRxBuffPtr = pData;

    hirda->RxXferSize = Size;

    hirda->RxXferCount = Size;

    hirda->ErrorCode = HAL_IRDA_ERROR_NONE;

    hirda->RxState = HAL_IRDA_STATE_BUSY_RX;

    /* Process Unlocked */

    __HAL_UNLOCK(hirda);

    /* Enable the IRDA Parity Error Interrupt */

    __HAL_IRDA_ENABLE_IT(hirda, IRDA_IT_PE);

    /* Enable the IRDA Error Interrupt: (Frame error, noise error, overrun error) */

    __HAL_IRDA_ENABLE_IT(hirda, IRDA_IT_ERR);

    /* Enable the IRDA Data Register not empty Interrupt */

    __HAL_IRDA_ENABLE_IT(hirda, IRDA_IT_RXNE);

    return HAL_OK;

  }

  else

  {

    return HAL_BUSY;

  }

}

/**

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

  * @param  hirda: Pointer to a IRDA_HandleTypeDef structure that contains

  *                the configuration information for the specified IRDA module.

  * @param  pData: Pointer to data buffer

  * @param  Size: Amount of data to be sent

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_IRDA_Transmit_DMA(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size)

{

  uint32_t *tmp;

  /* 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->pTxBuffPtr = pData;

    hirda->TxXferSize = Size;

    hirda->TxXferCount = Size;

    hirda->ErrorCode = HAL_IRDA_ERROR_NONE;

    hirda->gState = HAL_IRDA_STATE_BUSY_TX;

    /* Set the IRDA DMA transfer complete callback */

    hirda->hdmatx->XferCpltCallback = IRDA_DMATransmitCplt;

    /* Set the IRDA DMA half transfer complete callback */

    hirda->hdmatx->XferHalfCpltCallback = IRDA_DMATransmitHalfCplt;

    /* Set the DMA error callback */

    hirda->hdmatx->XferErrorCallback = IRDA_DMAError;

    /* Set the DMA abort callback */

    hirda->hdmatx->XferAbortCallback = NULL;

    /* Enable the IRDA transmit DMA Channel */

    tmp = (uint32_t*)&pData;

    HAL_DMA_Start_IT(hirda->hdmatx, *(uint32_t*)tmp, (uint32_t)&hirda->Instance->DR, Size);

    /* Clear the TC flag in the SR register by writing 0 to it */

    __HAL_IRDA_CLEAR_FLAG(hirda, IRDA_FLAG_TC);

    /* Process Unlocked */

    __HAL_UNLOCK(hirda);

    /* Enable the DMA transfer for transmit request by setting the DMAT bit

       in the USART CR3 register */

    SET_BIT(hirda->Instance->CR3, USART_CR3_DMAT);

    return HAL_OK;

  }

  else

  {

    return HAL_BUSY;

  }

}

/**

  * @brief  Receives an amount of data in non blocking mode.

  * @param  hirda: Pointer to a IRDA_HandleTypeDef structure that contains

  *                the configuration information for the specified IRDA module.

  * @param  pData: Pointer to data buffer

  * @param  Size: Amount of data to be received

  * @note   When the IRDA parity is enabled (PCE = 1) the data received contain the parity bit.

  * @retval HAL status

  */

HAL_StatusTypeDef HAL_IRDA_Receive_DMA(IRDA_HandleTypeDef *hirda, uint8_t *pData, uint16_t Size)

{

  uint32_t *tmp;

  /* 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->pRxBuffPtr = pData;

    hirda->RxXferSize = Size;

    hirda->ErrorCode = HAL_IRDA_ERROR_NONE;

    hirda->RxState = HAL_IRDA_STATE_BUSY_RX;

    /* Set the IRDA DMA transfer complete callback */

    hirda->hdmarx->XferCpltCallback = IRDA_DMAReceiveCplt;

    /* Set the IRDA DMA half transfer complete callback */

    hirda->hdmarx->XferHalfCpltCallback = IRDA_DMAReceiveHalfCplt;

    /* Set the DMA error callback */

    hirda->hdmarx->XferErrorCallback = IRDA_DMAError;

    /* Set the DMA abort callback */

    hirda->hdmarx->XferAbortCallback = NULL;

    /* Enable the DMA channel */

    tmp = (uint32_t*)&pData;

    HAL_DMA_Start_IT(hirda->hdmarx, (uint32_t)&hirda->Instance->DR, *(uint32_t*)tmp, Size);

    /* Clear the Overrun flag just before enabling the DMA Rx request: can be mandatory for the second transfer */

    __HAL_IRDA_CLEAR_OREFLAG(hirda);

    /* Process Unlocked */

    __HAL_UNLOCK(hirda);

    /* Enable the IRDA Parity Error Interrupt */

    SET_BIT(hirda->Instance->CR1, USART_CR1_PEIE);

    /* Enable the IRDA Error Interrupt: (Frame error, noise error, overrun error) */

    SET_BIT(hirda->Instance->CR3, USART_CR3_EIE);

    /* Enable the DMA transfer for the receiver request by setting the DMAR bit

    in the USART CR3 register */

    SET_BIT(hirda->Instance->CR3, USART_CR3_DMAR);

    return HAL_OK;

  }

  else

  {

    return HAL_BUSY;

  }

}

/**

  * @brief Pauses the DMA Transfer.

  * @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_DMAPause(IRDA_HandleTypeDef *hirda)

{

  uint32_t dmarequest = 0x00U;

  /* Process Locked */

  __HAL_LOCK(hirda);

  dmarequest = HAL_IS_BIT_SET(hirda->Instance->CR3, USART_CR3_DMAT);

  if((hirda->gState == HAL_IRDA_STATE_BUSY_TX) && dmarequest)

  {

    /* Disable the IRDA DMA Tx request */

    CLEAR_BIT(hirda->Instance->CR3, USART_CR3_DMAT);

  }

  dmarequest = HAL_IS_BIT_SET(hirda->Instance->CR3, USART_CR3_DMAR);

  if((hirda->RxState == HAL_IRDA_STATE_BUSY_RX) && dmarequest)

  {

    /* Disable PE and ERR (Frame error, noise error, overrun error) interrupts */

    CLEAR_BIT(hirda->Instance->CR1, USART_CR1_PEIE);

    CLEAR_BIT(hirda->Instance->CR3, USART_CR3_EIE);

    /* Disable the IRDA DMA Rx request */

    CLEAR_BIT(hirda->Instance->CR3, USART_CR3_DMAR);

  }

  /* Process Unlocked */

  __HAL_UNLOCK(hirda);

  return HAL_OK;

}

/**

  * @brief Resumes the DMA Transfer.

  * @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_DMAResume(IRDA_HandleTypeDef *hirda)

{

  /* Process Locked */

  __HAL_LOCK(hirda);

  if(hirda->gState == HAL_IRDA_STATE_BUSY_TX)

  {

    /* Enable the IRDA DMA Tx request */

    SET_BIT(hirda->Instance->CR3, USART_CR3_DMAT);

  }

  if(hirda->RxState == HAL_IRDA_STATE_BUSY_RX)

  {

    /* Clear the Overrun flag before resuming the Rx transfer */

    __HAL_IRDA_CLEAR_OREFLAG(hirda);

    /* Reenable PE and ERR (Frame error, noise error, overrun error) interrupts */

    SET_BIT(hirda->Instance->CR1, USART_CR1_PEIE);

    SET_BIT(hirda->Instance->CR3, USART_CR3_EIE);

    /* Enable the IRDA DMA Rx request */

    SET_BIT(hirda->Instance->CR3, USART_CR3_DMAR);

  }

  /* Process Unlocked */

  __HAL_UNLOCK(hirda);

  return HAL_OK;

}

/**

  * @brief Stops the DMA Transfer.

  * @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_DMAStop(IRDA_HandleTypeDef *hirda)

{

  uint32_t dmarequest = 0x00U;

  /* The Lock is not implemented on this API to allow the user application

  to call the HAL IRDA API under callbacks HAL_IRDA_TxCpltCallback() / HAL_IRDA_RxCpltCallback():

  when calling HAL_DMA_Abort() API the DMA TX/RX Transfer complete interrupt is generated

  and the correspond call back is executed HAL_IRDA_TxCpltCallback() / HAL_IRDA_RxCpltCallback()

  */