text:
/* Includes ------------------------------------------------------------------*/
#include "stm32l4xx_hal.h"

/** @addtogroup STM32L4xx_HAL_Driver
  * @{
  */

/** @defgroup I2C I2C
  * @brief I2C HAL module driver
  * @{
  */

#ifdef HAL_I2C_MODULE_ENABLED

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

/** @defgroup I2C_Private_Define I2C Private Define
  * @{
  */
#define TIMING_CLEAR_MASK   ((uint32_t)0xF0FFFFFF)  /*!<  I2C TIMING clear register Mask */
#define I2C_TIMEOUT_ADDR    ((uint32_t)10000)       /*!< 10 s  */
#define I2C_TIMEOUT_BUSY    ((uint32_t)25)          /*!< 25 ms */
#define I2C_TIMEOUT_DIR     ((uint32_t)25)          /*!< 25 ms */
#define I2C_TIMEOUT_RXNE    ((uint32_t)25)          /*!< 25 ms */
#define I2C_TIMEOUT_STOPF   ((uint32_t)25)          /*!< 25 ms */
#define I2C_TIMEOUT_TC      ((uint32_t)25)          /*!< 25 ms */
#define I2C_TIMEOUT_TCR     ((uint32_t)25)          /*!< 25 ms */
#define I2C_TIMEOUT_TXIS    ((uint32_t)25)          /*!< 25 ms */
#define I2C_TIMEOUT_FLAG    ((uint32_t)25)          /*!< 25 ms */

#define SlaveAddr_SHIFT     7
#define SlaveAddr_MSK       0x06

/* Private define for @ref PreviousState usage */
#define I2C_STATE_MSK             ((uint32_t)((HAL_I2C_STATE_BUSY_TX | HAL_I2C_STATE_BUSY_RX) & (~HAL_I2C_STATE_READY))) /*!< Mask State define, keep only RX and TX bits            */
#define I2C_STATE_NONE            ((uint32_t)(HAL_I2C_MODE_NONE))                                                        /*!< Default Value                                          */
#define I2C_STATE_MASTER_BUSY_TX  ((uint32_t)((HAL_I2C_STATE_BUSY_TX & I2C_STATE_MSK) | HAL_I2C_MODE_MASTER))            /*!< Master Busy TX, combinaison of State LSB and Mode enum */
#define I2C_STATE_MASTER_BUSY_RX  ((uint32_t)((HAL_I2C_STATE_BUSY_RX & I2C_STATE_MSK) | HAL_I2C_MODE_MASTER))            /*!< Master Busy RX, combinaison of State LSB and Mode enum */
#define I2C_STATE_SLAVE_BUSY_TX   ((uint32_t)((HAL_I2C_STATE_BUSY_TX & I2C_STATE_MSK) | HAL_I2C_MODE_SLAVE))             /*!< Slave Busy TX, combinaison of State LSB and Mode enum  */
#define I2C_STATE_SLAVE_BUSY_RX   ((uint32_t)((HAL_I2C_STATE_BUSY_RX & I2C_STATE_MSK) | HAL_I2C_MODE_SLAVE))             /*!< Slave Busy RX, combinaison of State LSB and Mode enum  */
#define I2C_STATE_MEM_BUSY_TX     ((uint32_t)((HAL_I2C_STATE_BUSY_TX & I2C_STATE_MSK) | HAL_I2C_MODE_MEM))               /*!< Memory Busy TX, combinaison of State LSB and Mode enum */
#define I2C_STATE_MEM_BUSY_RX     ((uint32_t)((HAL_I2C_STATE_BUSY_RX & I2C_STATE_MSK) | HAL_I2C_MODE_MEM))               /*!< Memory Busy RX, combinaison of State LSB and Mode enum */

/* Private define to centralize the enable/disable of Interrupts */
#define I2C_XFER_TX_IT                       ((uint32_t)0x00000001)
#define I2C_XFER_RX_IT                       ((uint32_t)0x00000002)
#define I2C_XFER_LISTEN_IT                   ((uint32_t)0x00000004)
/**
  * @}
  */

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/

/** @defgroup I2C_Private_Functions I2C Private Functions
  * @{
  */
static void I2C_DMAMasterTransmitCplt(DMA_HandleTypeDef *hdma);
static void I2C_DMAMasterReceiveCplt(DMA_HandleTypeDef *hdma);
static void I2C_DMASlaveTransmitCplt(DMA_HandleTypeDef *hdma);
static void I2C_DMASlaveReceiveCplt(DMA_HandleTypeDef *hdma);
static void I2C_DMAMemTransmitCplt(DMA_HandleTypeDef *hdma);
static void I2C_DMAMemReceiveCplt(DMA_HandleTypeDef *hdma);
static void I2C_DMAError(DMA_HandleTypeDef *hdma);

static HAL_StatusTypeDef I2C_RequestMemoryWrite(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_RequestMemoryRead(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_WaitOnFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Flag, FlagStatus Status, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_WaitOnTXISFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_WaitOnRXNEFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_WaitOnSTOPFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart);
static HAL_StatusTypeDef I2C_IsAcknowledgeFailed(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart);

static HAL_StatusTypeDef I2C_Master_ISR(I2C_HandleTypeDef *hi2c);
static HAL_StatusTypeDef I2C_Slave_ISR(I2C_HandleTypeDef *hi2c);

static HAL_StatusTypeDef I2C_Enable_IRQ(I2C_HandleTypeDef *hi2c, uint16_t InterruptRequest);
static HAL_StatusTypeDef I2C_Disable_IRQ(I2C_HandleTypeDef *hi2c, uint16_t InterruptRequest);

static void I2C_TransferConfig(I2C_HandleTypeDef *hi2c,  uint16_t DevAddress, uint8_t Size, uint32_t Mode, uint32_t Request);
/**
  * @}
  */

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

/** @defgroup I2C_Exported_Functions I2C Exported Functions
  * @{
  */

/** @defgroup I2C_Exported_Functions_Group1 Initialization and de-initialization functions
 *  @brief    Initialization and Configuration functions
 *
@verbatim
 ===============================================================================
              ##### Initialization and de-initialization functions #####
 ===============================================================================
    [..]  This subsection provides a set of functions allowing to initialize and
          deinitialize the I2Cx peripheral:

      (+) User must Implement HAL_I2C_MspInit() function in which he configures
          all related peripherals resources (CLOCK, GPIO, DMA, IT and NVIC ).

      (+) Call the function HAL_I2C_Init() to configure the selected device with
          the selected configuration:
        (++) Clock Timing
        (++) Own Address 1
        (++) Addressing mode (Master, Slave)
        (++) Dual Addressing mode
        (++) Own Address 2
        (++) Own Address 2 Mask
        (++) General call mode
        (++) Nostretch mode

      (+) Call the function HAL_I2C_DeInit() to restore the default configuration
          of the selected I2Cx peripheral.

@endverbatim
  * @{
  */

/**
  * @brief  Initializes the I2C according to the specified parameters
  *         in the I2C_InitTypeDef and initialize the associated handle.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Init(I2C_HandleTypeDef *hi2c)
{
  /* Check the I2C handle allocation */
  if(hi2c == NULL)
  {
    return HAL_ERROR;
  }

  /* Check the parameters */
  assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance));
  assert_param(IS_I2C_OWN_ADDRESS1(hi2c->Init.OwnAddress1));
  assert_param(IS_I2C_ADDRESSING_MODE(hi2c->Init.AddressingMode));
  assert_param(IS_I2C_DUAL_ADDRESS(hi2c->Init.DualAddressMode));
  assert_param(IS_I2C_OWN_ADDRESS2(hi2c->Init.OwnAddress2));
  assert_param(IS_I2C_OWN_ADDRESS2_MASK(hi2c->Init.OwnAddress2Masks));
  assert_param(IS_I2C_GENERAL_CALL(hi2c->Init.GeneralCallMode));
  assert_param(IS_I2C_NO_STRETCH(hi2c->Init.NoStretchMode));

  if(hi2c->State == HAL_I2C_STATE_RESET)
  {
    /* Allocate lock resource and initialize it */
    hi2c->Lock = HAL_UNLOCKED;

    /* Init the low level hardware : GPIO, CLOCK, CORTEX...etc */
    HAL_I2C_MspInit(hi2c);
  }

  hi2c->State = HAL_I2C_STATE_BUSY;

  /* Disable the selected I2C peripheral */
  __HAL_I2C_DISABLE(hi2c);

  /*---------------------------- I2Cx TIMINGR Configuration ------------------*/
  /* Configure I2Cx: Frequency range */
  hi2c->Instance->TIMINGR = hi2c->Init.Timing & TIMING_CLEAR_MASK;

  /*---------------------------- I2Cx OAR1 Configuration ---------------------*/
  /* Configure I2Cx: Own Address1 and ack own address1 mode */
  hi2c->Instance->OAR1 &= ~I2C_OAR1_OA1EN;
  if(hi2c->Init.OwnAddress1 != 0)
  {
    if(hi2c->Init.AddressingMode == I2C_ADDRESSINGMODE_7BIT)
    {
      hi2c->Instance->OAR1 = (I2C_OAR1_OA1EN | hi2c->Init.OwnAddress1);
    }
    else /* I2C_ADDRESSINGMODE_10BIT */
    {
      hi2c->Instance->OAR1 = (I2C_OAR1_OA1EN | I2C_OAR1_OA1MODE | hi2c->Init.OwnAddress1);
    }
  }

  /*---------------------------- I2Cx CR2 Configuration ----------------------*/
  /* Configure I2Cx: Addressing Master mode */
  if(hi2c->Init.AddressingMode == I2C_ADDRESSINGMODE_10BIT)
  {
    hi2c->Instance->CR2 = (I2C_CR2_ADD10);
  }
  /* Enable the AUTOEND by default, and enable NACK (should be disable only during Slave process */
  hi2c->Instance->CR2 |= (I2C_CR2_AUTOEND | I2C_CR2_NACK);

  /*---------------------------- I2Cx OAR2 Configuration ---------------------*/
  /* Configure I2Cx: Dual mode and Own Address2 */
  hi2c->Instance->OAR2 = (hi2c->Init.DualAddressMode | hi2c->Init.OwnAddress2 | (hi2c->Init.OwnAddress2Masks << 8));

  /*---------------------------- I2Cx CR1 Configuration ----------------------*/
  /* Configure I2Cx: Generalcall and NoStretch mode */
  hi2c->Instance->CR1 = (hi2c->Init.GeneralCallMode | hi2c->Init.NoStretchMode);

  /* Enable the selected I2C peripheral */
  __HAL_I2C_ENABLE(hi2c);

  hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
  hi2c->State = HAL_I2C_STATE_READY;
  hi2c->PreviousState = I2C_STATE_NONE;
  hi2c->Mode = HAL_I2C_MODE_NONE;

  return HAL_OK;
}

/**
  * @brief  DeInitialize the I2C peripheral.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_DeInit(I2C_HandleTypeDef *hi2c)
{
  /* Check the I2C handle allocation */
  if(hi2c == NULL)
  {
    return HAL_ERROR;
  }

  /* Check the parameters */
  assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance));

  hi2c->State = HAL_I2C_STATE_BUSY;

  /* Disable the I2C Peripheral Clock */
  __HAL_I2C_DISABLE(hi2c);

  /* DeInit the low level hardware: GPIO, CLOCK, NVIC */
  HAL_I2C_MspDeInit(hi2c);

  hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
  hi2c->State = HAL_I2C_STATE_RESET;
  hi2c->PreviousState = I2C_STATE_NONE;
  hi2c->Mode = HAL_I2C_MODE_NONE;

  /* Release Lock */
  __HAL_UNLOCK(hi2c);

  return HAL_OK;
}

/**
  * @brief Initialize the I2C MSP.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval None
  */
__weak void HAL_I2C_MspInit(I2C_HandleTypeDef *hi2c)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2c);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_I2C_MspInit could be implemented in the user file
   */
}

/**
  * @brief DeInitialize the I2C MSP.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval None
  */
__weak void HAL_I2C_MspDeInit(I2C_HandleTypeDef *hi2c)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2c);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_I2C_MspDeInit could be implemented in the user file
   */
}

/**
  * @}
  */

/** @defgroup I2C_Exported_Functions_Group2 Input and Output operation functions
 *  @brief   Data transfers functions
 *
@verbatim
 ===============================================================================
                      ##### IO operation functions #####
 ===============================================================================
    [..]
    This subsection provides a set of functions allowing to manage the I2C data
    transfers.

    (#) There are two modes of transfer:
       (++) Blocking mode : The communication is performed in the polling mode.
            The 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 functions return the status of the transfer startup.
            The end of the data processing will be indicated through the
            dedicated I2C IRQ when using Interrupt mode or the DMA IRQ when
            using DMA mode.

    (#) Blocking mode functions are :
        (++) HAL_I2C_Master_Transmit()
        (++) HAL_I2C_Master_Receive()
        (++) HAL_I2C_Slave_Transmit()
        (++) HAL_I2C_Slave_Receive()
        (++) HAL_I2C_Mem_Write()
        (++) HAL_I2C_Mem_Read()
        (++) HAL_I2C_IsDeviceReady()

    (#) No-Blocking mode functions with Interrupt are :
        (++) HAL_I2C_Master_Transmit_IT()
        (++) HAL_I2C_Master_Receive_IT()
        (++) HAL_I2C_Slave_Transmit_IT()
        (++) HAL_I2C_Slave_Receive_IT()
        (++) HAL_I2C_Mem_Write_IT()
        (++) HAL_I2C_Mem_Read_IT()

    (#) No-Blocking mode functions with DMA are :
        (++) HAL_I2C_Master_Transmit_DMA()
        (++) HAL_I2C_Master_Receive_DMA()
        (++) HAL_I2C_Slave_Transmit_DMA()
        (++) HAL_I2C_Slave_Receive_DMA()
        (++) HAL_I2C_Mem_Write_DMA()
        (++) HAL_I2C_Mem_Read_DMA()

    (#) A set of Transfer Complete Callbacks are provided in non Blocking mode:
        (++) HAL_I2C_MemTxCpltCallback()
        (++) HAL_I2C_MemRxCpltCallback()
        (++) HAL_I2C_MasterTxCpltCallback()
        (++) HAL_I2C_MasterRxCpltCallback()
        (++) HAL_I2C_SlaveTxCpltCallback()
        (++) HAL_I2C_SlaveRxCpltCallback()
        (++) HAL_I2C_ErrorCallback()

@endverbatim
  * @{
  */

/**
  * @brief  Transmits in master mode an amount of data in blocking mode.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @param  Timeout Timeout duration
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Master_Transmit(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
  uint32_t tickstart = 0;
  uint32_t sizetmp = 0;

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL ) || (Size == 0))
    {
      return  HAL_ERROR;
    }

    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) == SET)
    {
      return HAL_BUSY;
    }

    /* Process Locked */
    __HAL_LOCK(hi2c);

    /* Init tickstart for timeout management*/
    tickstart = HAL_GetTick();

    hi2c->State = HAL_I2C_STATE_BUSY_TX;
    hi2c->Mode = HAL_I2C_MODE_MASTER;
    hi2c->ErrorCode   = HAL_I2C_ERROR_NONE;

    /* Send Slave Address */
    /* Set NBYTES to write and reload if size > 255 and generate RESTART */
    /* Size > 255, need to set RELOAD bit */
    if(Size > 255)
    {
      I2C_TransferConfig(hi2c,DevAddress,255, I2C_RELOAD_MODE, I2C_GENERATE_START_WRITE);
      sizetmp = 255;
    }
    else
    {
      I2C_TransferConfig(hi2c,DevAddress,Size, I2C_AUTOEND_MODE, I2C_GENERATE_START_WRITE);
      sizetmp = Size;
    }

    do
    {
      /* Wait until TXIS flag is set */
      if(I2C_WaitOnTXISFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
      {
        if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
        {
          return HAL_ERROR;
        }
        else
        {
          return HAL_TIMEOUT;
        }
      }
      /* Write data to TXDR */
      hi2c->Instance->TXDR = (*pData++);
      sizetmp--;
      Size--;

      if((sizetmp == 0)&&(Size!=0))
      {
        /* Wait until TCR flag is set */
        if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_TCR, RESET, Timeout, tickstart) != HAL_OK)
        {
          return HAL_TIMEOUT;
        }

        if(Size > 255)
        {
          I2C_TransferConfig(hi2c,DevAddress,255, I2C_RELOAD_MODE, I2C_NO_STARTSTOP);
          sizetmp = 255;
        }
        else
        {
          I2C_TransferConfig(hi2c,DevAddress,Size, I2C_AUTOEND_MODE, I2C_NO_STARTSTOP);
          sizetmp = Size;
        }
      }

    }while(Size > 0);

    /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
    /* Wait until STOPF flag is set */
    if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        return HAL_ERROR;
      }
      else
      {
        return HAL_TIMEOUT;
      }
    }

    /* Clear STOP Flag */
    __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

    /* Clear Configuration Register 2 */
    I2C_RESET_CR2(hi2c);

    hi2c->State = HAL_I2C_STATE_READY;
    hi2c->Mode = HAL_I2C_MODE_NONE;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Receives in master mode an amount of data in blocking mode.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @param  Timeout Timeout duration
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Master_Receive(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
  uint32_t tickstart = 0;
  uint32_t sizetmp = 0;

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL ) || (Size == 0))
    {
      return  HAL_ERROR;
    }

    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) == SET)
    {
      return HAL_BUSY;
    }

    /* Process Locked */
    __HAL_LOCK(hi2c);

    /* Init tickstart for timeout management*/
    tickstart = HAL_GetTick();

    hi2c->State = HAL_I2C_STATE_BUSY_RX;
    hi2c->Mode = HAL_I2C_MODE_MASTER;
    hi2c->ErrorCode   = HAL_I2C_ERROR_NONE;

    /* Send Slave Address */
    /* Set NBYTES to write and reload if size > 255 and generate RESTART */
    /* Size > 255, need to set RELOAD bit */
    if(Size > 255)
    {
      I2C_TransferConfig(hi2c,DevAddress,255, I2C_RELOAD_MODE, I2C_GENERATE_START_READ);
      sizetmp = 255;
    }
    else
    {
      I2C_TransferConfig(hi2c,DevAddress,Size, I2C_AUTOEND_MODE, I2C_GENERATE_START_READ);
      sizetmp = Size;
    }

    do
    {
      /* Wait until RXNE flag is set */
      if(I2C_WaitOnRXNEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
      {
        if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
        {
          return HAL_ERROR;
        }
        else
        {
          return HAL_TIMEOUT;
        }
      }

      /* Write data to RXDR */
      (*pData++) =hi2c->Instance->RXDR;
      sizetmp--;
      Size--;

      if((sizetmp == 0)&&(Size!=0))
      {
        /* Wait until TCR flag is set */
        if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_TCR, RESET, Timeout, tickstart) != HAL_OK)
        {
          return HAL_TIMEOUT;
        }

        if(Size > 255)
        {
          I2C_TransferConfig(hi2c,DevAddress,255, I2C_RELOAD_MODE, I2C_NO_STARTSTOP);
          sizetmp = 255;
        }
        else
        {
          I2C_TransferConfig(hi2c,DevAddress,Size, I2C_AUTOEND_MODE, I2C_NO_STARTSTOP);
          sizetmp = Size;
        }
      }

    }while(Size > 0);

    /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
    /* Wait until STOPF flag is set */
    if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        return HAL_ERROR;
      }
      else
      {
        return HAL_TIMEOUT;
      }
    }

    /* Clear STOP Flag */
    __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

    /* Clear Configuration Register 2 */
    I2C_RESET_CR2(hi2c);

    hi2c->State = HAL_I2C_STATE_READY;
    hi2c->Mode = HAL_I2C_MODE_NONE;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Transmits in slave mode an amount of data in blocking mode.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @param  Timeout Timeout duration
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Slave_Transmit(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
  uint32_t tickstart = 0;

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL ) || (Size == 0))
    {
      return  HAL_ERROR;
    }
    /* Process Locked */
    __HAL_LOCK(hi2c);

    /* Init tickstart for timeout management*/
    tickstart = HAL_GetTick();

    hi2c->State = HAL_I2C_STATE_BUSY_TX;
    hi2c->Mode = HAL_I2C_MODE_SLAVE;
    hi2c->ErrorCode   = HAL_I2C_ERROR_NONE;

    /* Enable Address Acknowledge */
    hi2c->Instance->CR2 &= ~I2C_CR2_NACK;

    /* Wait until ADDR flag is set */
    if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, RESET, Timeout, tickstart) != HAL_OK)
    {
      /* Disable Address Acknowledge */
      hi2c->Instance->CR2 |= I2C_CR2_NACK;
      return HAL_TIMEOUT;
    }

    /* Clear ADDR flag */
    __HAL_I2C_CLEAR_FLAG(hi2c,I2C_FLAG_ADDR);

    /* If 10bit addressing mode is selected */
    if(hi2c->Init.AddressingMode == I2C_ADDRESSINGMODE_10BIT)
    {
      /* Wait until ADDR flag is set */
      if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, RESET, Timeout, tickstart) != HAL_OK)
      {
        /* Disable Address Acknowledge */
        hi2c->Instance->CR2 |= I2C_CR2_NACK;
        return HAL_TIMEOUT;
      }

      /* Clear ADDR flag */
      __HAL_I2C_CLEAR_FLAG(hi2c,I2C_FLAG_ADDR);
    }

    /* Wait until DIR flag is set Transmitter mode */
    if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_DIR, RESET, Timeout, tickstart) != HAL_OK)
    {
      /* Disable Address Acknowledge */
      hi2c->Instance->CR2 |= I2C_CR2_NACK;
      return HAL_TIMEOUT;
    }

    do
    {
      /* Wait until TXIS flag is set */
      if(I2C_WaitOnTXISFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
      {
        /* Disable Address Acknowledge */
        hi2c->Instance->CR2 |= I2C_CR2_NACK;

        if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
        {
          return HAL_ERROR;
        }
        else
        {
          return HAL_TIMEOUT;
        }
      }

      /* Write data to TXDR */
      hi2c->Instance->TXDR = (*pData++);
      Size--;
    }while(Size > 0);

    /* Wait until STOP flag is set */
    if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
    {
      /* Disable Address Acknowledge */
      hi2c->Instance->CR2 |= I2C_CR2_NACK;

      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
	/* Normal use case for Transmitter mode */
	/* A NACK is generated to confirm the end of transfer */
	hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
      }
      else
      {
        return HAL_TIMEOUT;
      }
    }

    /* Clear STOP flag */
    __HAL_I2C_CLEAR_FLAG(hi2c,I2C_FLAG_STOPF);

    /* Wait until BUSY flag is reset */
    if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, Timeout, tickstart) != HAL_OK)
    {
      /* Disable Address Acknowledge */
      hi2c->Instance->CR2 |= I2C_CR2_NACK;
      return HAL_TIMEOUT;
    }

    /* Disable Address Acknowledge */
    hi2c->Instance->CR2 |= I2C_CR2_NACK;

    hi2c->State = HAL_I2C_STATE_READY;
    hi2c->Mode = HAL_I2C_MODE_NONE;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Receive in slave mode an amount of data in blocking mode
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @param  Timeout Timeout duration
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Slave_Receive(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
  uint32_t tickstart = 0;

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL ) || (Size == 0))
    {
      return  HAL_ERROR;
    }
    /* Process Locked */
    __HAL_LOCK(hi2c);

    /* Init tickstart for timeout management*/
    tickstart = HAL_GetTick();

    hi2c->State = HAL_I2C_STATE_BUSY_RX;
    hi2c->Mode = HAL_I2C_MODE_SLAVE;
    hi2c->ErrorCode   = HAL_I2C_ERROR_NONE;

    /* Enable Address Acknowledge */
    hi2c->Instance->CR2 &= ~I2C_CR2_NACK;

    /* Wait until ADDR flag is set */
    if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, RESET, Timeout, tickstart) != HAL_OK)
    {
      /* Disable Address Acknowledge */
      hi2c->Instance->CR2 |= I2C_CR2_NACK;
      return HAL_TIMEOUT;
    }

    /* Clear ADDR flag */
    __HAL_I2C_CLEAR_FLAG(hi2c,I2C_FLAG_ADDR);

    /* Wait until DIR flag is reset Receiver mode */
    if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_DIR, SET, Timeout, tickstart) != HAL_OK)
    {
      /* Disable Address Acknowledge */
      hi2c->Instance->CR2 |= I2C_CR2_NACK;
      return HAL_TIMEOUT;
    }

    while(Size > 0)
    {
      /* Wait until RXNE flag is set */
      if(I2C_WaitOnRXNEFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
      {
        /* Disable Address Acknowledge */
        hi2c->Instance->CR2 |= I2C_CR2_NACK;

        /* Store Last receive data if any */
        if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_RXNE) == SET)
        {
          /* Read data from RXDR */
          (*pData++) = hi2c->Instance->RXDR;
        }

        if(hi2c->ErrorCode == HAL_I2C_ERROR_TIMEOUT)
        {
          return HAL_TIMEOUT;
        }
        else
        {
          return HAL_ERROR;
        }
      }

      /* Read data from RXDR */
      (*pData++) = hi2c->Instance->RXDR;
      Size--;
    }

    /* Wait until STOP flag is set */
    if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
    {
      /* Disable Address Acknowledge */
      hi2c->Instance->CR2 |= I2C_CR2_NACK;

      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        return HAL_ERROR;
      }
      else
      {
        return HAL_TIMEOUT;
      }
    }

    /* Clear STOP flag */
    __HAL_I2C_CLEAR_FLAG(hi2c,I2C_FLAG_STOPF);

    /* Wait until BUSY flag is reset */
    if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, Timeout, tickstart) != HAL_OK)
    {
      /* Disable Address Acknowledge */
      hi2c->Instance->CR2 |= I2C_CR2_NACK;
      return HAL_TIMEOUT;
    }

    /* Disable Address Acknowledge */
    hi2c->Instance->CR2 |= I2C_CR2_NACK;

    hi2c->State = HAL_I2C_STATE_READY;
    hi2c->Mode = HAL_I2C_MODE_NONE;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Transmit in master mode an amount of data in non-blocking mode with Interrupt
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Master_Transmit_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size)
{
  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL) || (Size == 0))
    {
      return  HAL_ERROR;
    }

    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) == SET)
    {
      return HAL_BUSY;
    }

    /* Process Locked */
    __HAL_LOCK(hi2c);

    hi2c->State = HAL_I2C_STATE_BUSY_TX;
    hi2c->Mode = HAL_I2C_MODE_MASTER;
    hi2c->ErrorCode   = HAL_I2C_ERROR_NONE;
    hi2c->XferOptions = I2C_NO_OPTION_FRAME;

    hi2c->pBuffPtr = pData;
    hi2c->XferCount = Size;
    if(Size > 255)
    {
      hi2c->XferSize = 255;
    }
    else
    {
      hi2c->XferSize = Size;
    }

    /* Send Slave Address */
    /* Set NBYTES to write and reload if size > 255 and generate RESTART */
    if( (hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount) )
    {
      I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_RELOAD_MODE, I2C_GENERATE_START_WRITE);
    }
    else
    {
      I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_AUTOEND_MODE, I2C_GENERATE_START_WRITE);
    }

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    /* Note : The I2C interrupts must be enabled after unlocking current process
              to avoid the risk of I2C interrupt handle execution before current
              process unlock */

    /* Enable ERR, TC, STOP, NACK, TXI interrupt */
    /* possible to enable all of these */
    /* I2C_IT_ERRI | I2C_IT_TCI| I2C_IT_STOPI| I2C_IT_NACKI | I2C_IT_ADDRI | I2C_IT_RXI | I2C_IT_TXI */
    I2C_Enable_IRQ(hi2c, I2C_XFER_TX_IT);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Receive in master mode an amount of data in non-blocking mode with Interrupt
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Master_Receive_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size)
{
  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL) || (Size == 0))
    {
      return  HAL_ERROR;
    }

    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) == SET)
    {
      return HAL_BUSY;
    }

    /* Process Locked */
    __HAL_LOCK(hi2c);

    hi2c->State = HAL_I2C_STATE_BUSY_RX;
    hi2c->Mode = HAL_I2C_MODE_MASTER;
    hi2c->ErrorCode   = HAL_I2C_ERROR_NONE;
    hi2c->XferOptions = I2C_NO_OPTION_FRAME;

    hi2c->pBuffPtr = pData;
    hi2c->XferCount = Size;
    if(Size > 255)
    {
      hi2c->XferSize = 255;
    }
    else
    {
      hi2c->XferSize = Size;
    }

    /* Send Slave Address */
    /* Set NBYTES to write and reload if size > 255 and generate RESTART */
    if( (hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount) )
    {
      I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_RELOAD_MODE, I2C_GENERATE_START_READ);
    }
    else
    {
      I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_AUTOEND_MODE, I2C_GENERATE_START_READ);
    }

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    /* Note : The I2C interrupts must be enabled after unlocking current process
              to avoid the risk of I2C interrupt handle execution before current
              process unlock */

    /* Enable ERR, TC, STOP, NACK, RXI interrupt */
    /* possible to enable all of these */
    /* I2C_IT_ERRI | I2C_IT_TCI| I2C_IT_STOPI| I2C_IT_NACKI | I2C_IT_ADDRI | I2C_IT_RXI | I2C_IT_TXI */
    I2C_Enable_IRQ(hi2c, I2C_XFER_RX_IT);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Transmit in slave mode an amount of data in non-blocking mode with Interrupt
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Slave_Transmit_IT(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size)
{
  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL) || (Size == 0))
    {
      return  HAL_ERROR;
    }
    /* Process Locked */
    __HAL_LOCK(hi2c);

    hi2c->State = HAL_I2C_STATE_BUSY_TX;
    hi2c->Mode = HAL_I2C_MODE_SLAVE;
    hi2c->ErrorCode   = HAL_I2C_ERROR_NONE;
    hi2c->XferOptions = I2C_NO_OPTION_FRAME;

    /* Enable Address Acknowledge */
    hi2c->Instance->CR2 &= ~I2C_CR2_NACK;

    hi2c->pBuffPtr = pData;
    hi2c->XferSize = Size;
    hi2c->XferCount = Size;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    /* Note : The I2C interrupts must be enabled after unlocking current process
              to avoid the risk of I2C interrupt handle execution before current
              process unlock */

    /* Enable ERR, TC, STOP, NACK, TXI interrupt */
    /* possible to enable all of these */
    /* I2C_IT_ERRI | I2C_IT_TCI| I2C_IT_STOPI| I2C_IT_NACKI | I2C_IT_ADDRI | I2C_IT_RXI | I2C_IT_TXI */
    I2C_Enable_IRQ(hi2c, I2C_XFER_TX_IT | I2C_XFER_LISTEN_IT);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Receive in slave mode an amount of data in non-blocking mode with Interrupt
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Slave_Receive_IT(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size)
{
  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL) || (Size == 0))
    {
      return  HAL_ERROR;
    }
    /* Process Locked */
    __HAL_LOCK(hi2c);

    hi2c->State = HAL_I2C_STATE_BUSY_RX;
    hi2c->Mode = HAL_I2C_MODE_SLAVE;
    hi2c->ErrorCode   = HAL_I2C_ERROR_NONE;
    hi2c->XferOptions = I2C_NO_OPTION_FRAME;

    /* Enable Address Acknowledge */
    hi2c->Instance->CR2 &= ~I2C_CR2_NACK;

    hi2c->pBuffPtr = pData;
    hi2c->XferSize = Size;
    hi2c->XferCount = Size;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    /* Note : The I2C interrupts must be enabled after unlocking current process
              to avoid the risk of I2C interrupt handle execution before current
              process unlock */

    /* Enable ERR, TC, STOP, NACK, RXI interrupt */
    /* possible to enable all of these */
    /* I2C_IT_ERRI | I2C_IT_TCI| I2C_IT_STOPI| I2C_IT_NACKI | I2C_IT_ADDRI | I2C_IT_RXI | I2C_IT_TXI */
    I2C_Enable_IRQ(hi2c, I2C_XFER_RX_IT | I2C_XFER_LISTEN_IT);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Transmit in master mode an amount of data in non-blocking mode with DMA
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Master_Transmit_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size)
{
  uint32_t tickstart = 0;

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL) || (Size == 0))
    {
      return  HAL_ERROR;
    }

    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) == SET)
    {
      return HAL_BUSY;
    }

    /* Process Locked */
    __HAL_LOCK(hi2c);

    /* Init tickstart for timeout management*/
    tickstart = HAL_GetTick();

    hi2c->State = HAL_I2C_STATE_BUSY_TX;
    hi2c->Mode = HAL_I2C_MODE_MASTER;
    hi2c->ErrorCode   = HAL_I2C_ERROR_NONE;

    hi2c->pBuffPtr = pData;
    hi2c->XferCount = Size;
    if(Size > 255)
    {
      hi2c->XferSize = 255;
    }
    else
    {
      hi2c->XferSize = Size;
    }

    /* Set the I2C DMA transfer complete callback */
    hi2c->hdmatx->XferCpltCallback = I2C_DMAMasterTransmitCplt;

    /* Set the DMA error callback */
    hi2c->hdmatx->XferErrorCallback = I2C_DMAError;

    /* Enable the DMA channel */
    HAL_DMA_Start_IT(hi2c->hdmatx, (uint32_t)pData, (uint32_t)&hi2c->Instance->TXDR, hi2c->XferSize);

    /* Send Slave Address */
    /* Set NBYTES to write and reload if size > 255 and generate RESTART */
    if((hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount))
    {
      I2C_TransferConfig(hi2c, DevAddress, hi2c->XferSize, I2C_RELOAD_MODE, I2C_GENERATE_START_WRITE);
    }
    else
    {
      I2C_TransferConfig(hi2c, DevAddress, hi2c->XferSize, I2C_AUTOEND_MODE, I2C_GENERATE_START_WRITE);
    }

    /* Wait until TXIS flag is set */
    if(I2C_WaitOnTXISFlagUntilTimeout(hi2c, I2C_TIMEOUT_TXIS, tickstart) != HAL_OK)
    {
      /* Disable Address Acknowledge */
      hi2c->Instance->CR2 |= I2C_CR2_NACK;

      /* Abort DMA */
      HAL_DMA_Abort(hi2c->hdmatx);

      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        return HAL_ERROR;
      }
      else
      {
        return HAL_TIMEOUT;
      }
    }

    /* Enable DMA Request */
    hi2c->Instance->CR1 |= I2C_CR1_TXDMAEN;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Receive in master mode an amount of data in non-blocking mode with DMA
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Master_Receive_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size)
{
  uint32_t tickstart = 0;

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL) || (Size == 0))
    {
      return  HAL_ERROR;
    }

    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) == SET)
    {
      return HAL_BUSY;
    }

    /* Process Locked */
    __HAL_LOCK(hi2c);

    /* Init tickstart for timeout management*/
    tickstart = HAL_GetTick();

    hi2c->State = HAL_I2C_STATE_BUSY_RX;
    hi2c->Mode = HAL_I2C_MODE_MASTER;
    hi2c->ErrorCode   = HAL_I2C_ERROR_NONE;

    hi2c->pBuffPtr = pData;
    hi2c->XferCount = Size;
    if(Size > 255)
    {
      hi2c->XferSize = 255;
    }
    else
    {
      hi2c->XferSize = Size;
    }

    /* Set the I2C DMA transfer complete callback */
    hi2c->hdmarx->XferCpltCallback = I2C_DMAMasterReceiveCplt;

    /* Set the DMA error callback */
    hi2c->hdmarx->XferErrorCallback = I2C_DMAError;

    /* Enable the DMA channel */
    HAL_DMA_Start_IT(hi2c->hdmarx, (uint32_t)&hi2c->Instance->RXDR, (uint32_t)pData, hi2c->XferSize);

    /* Send Slave Address */
    /* Set NBYTES to write and reload if size > 255 and generate RESTART */
    if( (hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount) )
    {
      I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_RELOAD_MODE, I2C_GENERATE_START_READ);
    }
    else
    {
      I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_AUTOEND_MODE, I2C_GENERATE_START_READ);
    }

    /* Wait until RXNE flag is set */
    if(I2C_WaitOnRXNEFlagUntilTimeout(hi2c, I2C_FLAG_RXNE, tickstart) != HAL_OK)
    {
      /* Abort DMA */
      HAL_DMA_Abort(hi2c->hdmarx);

      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        return HAL_ERROR;
      }
      else
      {
        return HAL_TIMEOUT;
      }
    }

    /* Enable DMA Request */
    hi2c->Instance->CR1 |= I2C_CR1_RXDMAEN;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Transmit in slave mode an amount of data in non-blocking mode with DMA
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Slave_Transmit_DMA(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size)
{
  uint32_t tickstart = 0;

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL) || (Size == 0))
    {
      return  HAL_ERROR;
    }
    /* Process Locked */
    __HAL_LOCK(hi2c);

    /* Init tickstart for timeout management*/
    tickstart = HAL_GetTick();

    hi2c->State = HAL_I2C_STATE_BUSY_TX;
    hi2c->Mode = HAL_I2C_MODE_SLAVE;
    hi2c->ErrorCode   = HAL_I2C_ERROR_NONE;

    hi2c->pBuffPtr = pData;
    hi2c->XferCount = Size;
    hi2c->XferSize = Size;

    /* Set the I2C DMA transfer complete callback */
    hi2c->hdmatx->XferCpltCallback = I2C_DMASlaveTransmitCplt;

    /* Set the DMA error callback */
    hi2c->hdmatx->XferErrorCallback = I2C_DMAError;

    /* Enable the DMA channel */
    HAL_DMA_Start_IT(hi2c->hdmatx, (uint32_t)pData, (uint32_t)&hi2c->Instance->TXDR, hi2c->XferSize);

    /* Enable Address Acknowledge */
    hi2c->Instance->CR2 &= ~I2C_CR2_NACK;

    /* Wait until ADDR flag is set */
    if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, RESET, I2C_TIMEOUT_ADDR, tickstart) != HAL_OK)
    {
      /* Disable Address Acknowledge */
      hi2c->Instance->CR2 |= I2C_CR2_NACK;
      return HAL_TIMEOUT;
    }

    /* Clear ADDR flag */
    __HAL_I2C_CLEAR_FLAG(hi2c,I2C_FLAG_ADDR);

    /* If 10bits addressing mode is selected */
    if(hi2c->Init.AddressingMode == I2C_ADDRESSINGMODE_10BIT)
    {
      /* Wait until ADDR flag is set */
      if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, RESET, I2C_TIMEOUT_ADDR, tickstart) != HAL_OK)
      {
        /* Disable Address Acknowledge */
        hi2c->Instance->CR2 |= I2C_CR2_NACK;
        return HAL_TIMEOUT;
      }

      /* Clear ADDR flag */
      __HAL_I2C_CLEAR_FLAG(hi2c,I2C_FLAG_ADDR);
    }

    /* Wait until DIR flag is set Transmitter mode */
    if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_DIR, RESET, I2C_TIMEOUT_BUSY, tickstart) != HAL_OK)
    {
      /* Disable Address Acknowledge */
      hi2c->Instance->CR2 |= I2C_CR2_NACK;
      return HAL_TIMEOUT;
    }

    /* Enable DMA Request */
    hi2c->Instance->CR1 |= I2C_CR1_TXDMAEN;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Receive in slave mode an amount of data in non-blocking mode with DMA
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Slave_Receive_DMA(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size)
{
  uint32_t tickstart = 0;

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL) || (Size == 0))
    {
      return  HAL_ERROR;
    }
    /* Process Locked */
    __HAL_LOCK(hi2c);

    /* Init tickstart for timeout management*/
    tickstart = HAL_GetTick();

    hi2c->State = HAL_I2C_STATE_BUSY_RX;
    hi2c->Mode = HAL_I2C_MODE_SLAVE;
    hi2c->ErrorCode   = HAL_I2C_ERROR_NONE;

    hi2c->pBuffPtr = pData;
    hi2c->XferSize = Size;
    hi2c->XferCount = Size;

    /* Set the I2C DMA transfer complete callback */
    hi2c->hdmarx->XferCpltCallback = I2C_DMASlaveReceiveCplt;

    /* Set the DMA error callback */
    hi2c->hdmarx->XferErrorCallback = I2C_DMAError;

    /* Enable the DMA channel */
    HAL_DMA_Start_IT(hi2c->hdmarx, (uint32_t)&hi2c->Instance->RXDR, (uint32_t)pData, Size);

    /* Enable Address Acknowledge */
    hi2c->Instance->CR2 &= ~I2C_CR2_NACK;

    /* Wait until ADDR flag is set */
    if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_ADDR, RESET, I2C_TIMEOUT_ADDR, tickstart) != HAL_OK)
    {
      /* Disable Address Acknowledge */
      hi2c->Instance->CR2 |= I2C_CR2_NACK;
      return HAL_TIMEOUT;
    }

    /* Clear ADDR flag */
    __HAL_I2C_CLEAR_FLAG(hi2c,I2C_FLAG_ADDR);

    /* Wait until DIR flag is set Receiver mode */
    if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_DIR, SET, I2C_TIMEOUT_DIR, tickstart) != HAL_OK)
    {
      /* Disable Address Acknowledge */
      hi2c->Instance->CR2 |= I2C_CR2_NACK;
      return HAL_TIMEOUT;
    }

    /* Enable DMA Request */
    hi2c->Instance->CR1 |= I2C_CR1_RXDMAEN;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}
/**
  * @brief  Write an amount of data in blocking mode to a specific memory address
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  MemAddress Internal memory address
  * @param  MemAddSize Size of internal memory address
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @param  Timeout Timeout duration
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Mem_Write(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
  uint32_t tickstart = 0;
  uint32_t Sizetmp = 0;

  /* Check the parameters */
  assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL) || (Size == 0))
    {
      return  HAL_ERROR;
    }

    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) == SET)
    {
      return HAL_BUSY;
    }

    /* Process Locked */
    __HAL_LOCK(hi2c);

    /* Init tickstart for timeout management*/
    tickstart = HAL_GetTick();

    hi2c->State = HAL_I2C_STATE_BUSY_TX;
    hi2c->Mode = HAL_I2C_MODE_MEM;
    hi2c->ErrorCode = HAL_I2C_ERROR_NONE;

    /* Send Slave Address and Memory Address */
    if(I2C_RequestMemoryWrite(hi2c, DevAddress, MemAddress, MemAddSize, Timeout, tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);
        return HAL_ERROR;
      }
      else
      {
        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);
        return HAL_TIMEOUT;
      }
    }

    /* Set NBYTES to write and reload if size > 255 */
    /* Size > 255, need to set RELOAD bit */
    if(Size > 255)
    {
      I2C_TransferConfig(hi2c,DevAddress,255, I2C_RELOAD_MODE, I2C_NO_STARTSTOP);
      Sizetmp = 255;
    }
    else
    {
      I2C_TransferConfig(hi2c,DevAddress,Size, I2C_AUTOEND_MODE, I2C_NO_STARTSTOP);
      Sizetmp = Size;
    }

    do
    {
      /* Wait until TXIS flag is set */
      if(I2C_WaitOnTXISFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
      {
        if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
        {
          return HAL_ERROR;
        }
        else
        {
          return HAL_TIMEOUT;
        }
      }

      /* Write data to DR */
      hi2c->Instance->TXDR = (*pData++);
      Sizetmp--;
      Size--;

      if((Sizetmp == 0)&&(Size!=0))
      {
        /* Wait until TCR flag is set */
        if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_TCR, RESET, Timeout, tickstart) != HAL_OK)
        {
          return HAL_TIMEOUT;
        }

        if(Size > 255)
        {
          I2C_TransferConfig(hi2c,DevAddress,255, I2C_RELOAD_MODE, I2C_NO_STARTSTOP);
          Sizetmp = 255;
        }
        else
        {
          I2C_TransferConfig(hi2c,DevAddress,Size, I2C_AUTOEND_MODE, I2C_NO_STARTSTOP);
          Sizetmp = Size;
        }
      }

    }while(Size > 0);

    /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
    /* Wait until STOPF flag is reset */
    if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        return HAL_ERROR;
      }
      else
      {
        return HAL_TIMEOUT;
      }
    }

    /* Clear STOP Flag */
    __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

    /* Clear Configuration Register 2 */
    I2C_RESET_CR2(hi2c);

    hi2c->State = HAL_I2C_STATE_READY;
    hi2c->Mode = HAL_I2C_MODE_NONE;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Read an amount of data in blocking mode from a specific memory address
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  MemAddress Internal memory address
  * @param  MemAddSize Size of internal memory address
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @param  Timeout Timeout duration
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Mem_Read(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
  uint32_t tickstart = 0;
  uint32_t Sizetmp = 0;

  /* Check the parameters */
  assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL) || (Size == 0))
    {
      return  HAL_ERROR;
    }

    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) == SET)
    {
      return HAL_BUSY;
    }

    /* Process Locked */
    __HAL_LOCK(hi2c);

    /* Init tickstart for timeout management*/
    tickstart = HAL_GetTick();

    hi2c->State = HAL_I2C_STATE_BUSY_RX;
    hi2c->Mode = HAL_I2C_MODE_MEM;
    hi2c->ErrorCode = HAL_I2C_ERROR_NONE;

    /* Send Slave Address and Memory Address */
    if(I2C_RequestMemoryRead(hi2c, DevAddress, MemAddress, MemAddSize, Timeout, tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);
        return HAL_ERROR;
      }
      else
      {
        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);
        return HAL_TIMEOUT;
      }
    }

    /* Send Slave Address */
    /* Set NBYTES to write and reload if size > 255 and generate RESTART */
    /* Size > 255, need to set RELOAD bit */
    if(Size > 255)
    {
      I2C_TransferConfig(hi2c,DevAddress,255, I2C_RELOAD_MODE, I2C_GENERATE_START_READ);
      Sizetmp = 255;
    }
    else
    {
      I2C_TransferConfig(hi2c,DevAddress,Size, I2C_AUTOEND_MODE, I2C_GENERATE_START_READ);
      Sizetmp = Size;
    }

    do
    {
      /* Wait until RXNE flag is set */
      if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_RXNE, RESET, Timeout, tickstart) != HAL_OK)
      {
        return HAL_TIMEOUT;
      }

      /* Read data from RXDR */
      (*pData++) = hi2c->Instance->RXDR;

      /* Decrement the Size counter */
      Sizetmp--;
      Size--;

      if((Sizetmp == 0)&&(Size!=0))
      {
        /* Wait until TCR flag is set */
        if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_TCR, RESET, Timeout, tickstart) != HAL_OK)
        {
          return HAL_TIMEOUT;
        }

        if(Size > 255)
        {
          I2C_TransferConfig(hi2c,DevAddress,255, I2C_RELOAD_MODE, I2C_NO_STARTSTOP);
          Sizetmp = 255;
        }
        else
        {
          I2C_TransferConfig(hi2c,DevAddress,Size, I2C_AUTOEND_MODE, I2C_NO_STARTSTOP);
          Sizetmp = Size;
        }
      }

    }while(Size > 0);

    /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
    /* Wait until STOPF flag is reset */
    if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, Timeout, tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        return HAL_ERROR;
      }
      else
      {
        return HAL_TIMEOUT;
      }
    }

    /* Clear STOP Flag */
    __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

    /* Clear Configuration Register 2 */
    I2C_RESET_CR2(hi2c);

    hi2c->State = HAL_I2C_STATE_READY;
    hi2c->Mode = HAL_I2C_MODE_NONE;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}
/**
  * @brief  Write an amount of data in non-blocking mode with Interrupt to a specific memory address
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  MemAddress Internal memory address
  * @param  MemAddSize Size of internal memory address
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Mem_Write_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size)
{
  uint32_t tickstart = 0;

  /* Check the parameters */
  assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL) || (Size == 0))
    {
      return  HAL_ERROR;
    }

    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) == SET)
    {
      return HAL_BUSY;
    }

    /* Process Locked */
    __HAL_LOCK(hi2c);

    /* Init tickstart for timeout management*/
    tickstart = HAL_GetTick();

    hi2c->State = HAL_I2C_STATE_BUSY_TX;
    hi2c->Mode = HAL_I2C_MODE_MEM;
    hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
    hi2c->XferOptions = I2C_NO_OPTION_FRAME;

    hi2c->pBuffPtr = pData;
    hi2c->XferCount = Size;
    if(Size > 255)
    {
      hi2c->XferSize = 255;
    }
    else
    {
      hi2c->XferSize = Size;
    }

    /* Send Slave Address and Memory Address */
    if(I2C_RequestMemoryWrite(hi2c, DevAddress, MemAddress, MemAddSize, I2C_TIMEOUT_FLAG, tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);
        return HAL_ERROR;
      }
      else
      {
        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);
        return HAL_TIMEOUT;
      }
    }

    /* Set NBYTES to write and reload if size > 255 */
    /* Size > 255, need to set RELOAD bit */
    if( (hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount) )
    {
      I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_RELOAD_MODE, I2C_NO_STARTSTOP);
    }
    else
    {
      I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_AUTOEND_MODE, I2C_NO_STARTSTOP);
    }

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    /* Note : The I2C interrupts must be enabled after unlocking current process
              to avoid the risk of I2C interrupt handle execution before current
              process unlock */

    /* Enable ERR, TC, STOP, NACK, TXI interrupt */
    /* possible to enable all of these */
    /* I2C_IT_ERRI | I2C_IT_TCI| I2C_IT_STOPI| I2C_IT_NACKI | I2C_IT_ADDRI | I2C_IT_RXI | I2C_IT_TXI */
    I2C_Enable_IRQ(hi2c, I2C_XFER_TX_IT);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Read an amount of data in non-blocking mode with Interrupt from a specific memory address
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  MemAddress Internal memory address
  * @param  MemAddSize Size of internal memory address
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Mem_Read_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size)
{
  uint32_t tickstart = 0;

  /* Check the parameters */
  assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL) || (Size == 0))
    {
      return  HAL_ERROR;
    }

    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) == SET)
    {
      return HAL_BUSY;
    }

    /* Process Locked */
    __HAL_LOCK(hi2c);

    /* Init tickstart for timeout management*/
    tickstart = HAL_GetTick();

    hi2c->State = HAL_I2C_STATE_BUSY_RX;
    hi2c->Mode = HAL_I2C_MODE_MEM;
    hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
    hi2c->XferOptions = I2C_NO_OPTION_FRAME;

    hi2c->pBuffPtr = pData;
    hi2c->XferCount = Size;
    if(Size > 255)
    {
      hi2c->XferSize = 255;
    }
    else
    {
      hi2c->XferSize = Size;
    }

    /* Send Slave Address and Memory Address */
    if(I2C_RequestMemoryRead(hi2c, DevAddress, MemAddress, MemAddSize, I2C_TIMEOUT_FLAG, tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);
        return HAL_ERROR;
      }
      else
      {
        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);
        return HAL_TIMEOUT;
      }
    }

    /* Set NBYTES to write and reload if size > 255 and generate RESTART */
    /* Size > 255, need to set RELOAD bit */
    if( (hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount) )
    {
      I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_RELOAD_MODE, I2C_GENERATE_START_READ);
    }
    else
    {
      I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_AUTOEND_MODE, I2C_GENERATE_START_READ);
    }

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    /* Note : The I2C interrupts must be enabled after unlocking current process
              to avoid the risk of I2C interrupt handle execution before current
              process unlock */

    /* Enable ERR, TC, STOP, NACK, RXI interrupt */
    /* possible to enable all of these */
    /* I2C_IT_ERRI | I2C_IT_TCI| I2C_IT_STOPI| I2C_IT_NACKI | I2C_IT_ADDRI | I2C_IT_RXI | I2C_IT_TXI */
    I2C_Enable_IRQ(hi2c, I2C_XFER_RX_IT);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}
/**
  * @brief  Write an amount of data in non-blocking mode with DMA to a specific memory address
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  MemAddress Internal memory address
  * @param  MemAddSize Size of internal memory address
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Mem_Write_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size)
{
  uint32_t tickstart = 0;

  /* Check the parameters */
  assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL) || (Size == 0))
    {
      return  HAL_ERROR;
    }

    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) == SET)
    {
      return HAL_BUSY;
    }

    /* Process Locked */
    __HAL_LOCK(hi2c);

    /* Init tickstart for timeout management*/
    tickstart = HAL_GetTick();

    hi2c->State = HAL_I2C_STATE_BUSY_TX;
    hi2c->Mode = HAL_I2C_MODE_MEM;
    hi2c->ErrorCode = HAL_I2C_ERROR_NONE;

    hi2c->pBuffPtr = pData;
    hi2c->XferCount = Size;
    if(Size > 255)
    {
      hi2c->XferSize = 255;
    }
    else
    {
      hi2c->XferSize = Size;
    }

    /* Set the I2C DMA transfer complete callback */
    hi2c->hdmatx->XferCpltCallback = I2C_DMAMemTransmitCplt;

    /* Set the DMA error callback */
    hi2c->hdmatx->XferErrorCallback = I2C_DMAError;

    /* Enable the DMA channel */
    HAL_DMA_Start_IT(hi2c->hdmatx, (uint32_t)pData, (uint32_t)&hi2c->Instance->TXDR, hi2c->XferSize);

    /* Send Slave Address and Memory Address */
    if(I2C_RequestMemoryWrite(hi2c, DevAddress, MemAddress, MemAddSize, I2C_TIMEOUT_FLAG, tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);
        return HAL_ERROR;
      }
      else
      {
        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);
        return HAL_TIMEOUT;
      }
    }

    /* Send Slave Address */
    /* Set NBYTES to write and reload if size > 255 */
    if( (hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount) )
    {
      I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_RELOAD_MODE, I2C_NO_STARTSTOP);
    }
    else
    {
      I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_AUTOEND_MODE, I2C_NO_STARTSTOP);
    }

    /* Wait until TXIS flag is set */
    if(I2C_WaitOnTXISFlagUntilTimeout(hi2c, I2C_TIMEOUT_TXIS, tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        return HAL_ERROR;
      }
      else
      {
        return HAL_TIMEOUT;
      }
    }

    /* Enable DMA Request */
    hi2c->Instance->CR1 |= I2C_CR1_TXDMAEN;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Reads an amount of data in non-blocking mode with DMA from a specific memory address.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  MemAddress Internal memory address
  * @param  MemAddSize Size of internal memory address
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be read
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Mem_Read_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size)
{
  uint32_t tickstart = 0;

  /* Check the parameters */
  assert_param(IS_I2C_MEMADD_SIZE(MemAddSize));

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if((pData == NULL) || (Size == 0))
    {
      return  HAL_ERROR;
    }

    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) == SET)
    {
      return HAL_BUSY;
    }

    /* Process Locked */
    __HAL_LOCK(hi2c);

    /* Init tickstart for timeout management*/
    tickstart = HAL_GetTick();

    hi2c->State = HAL_I2C_STATE_BUSY_RX;
    hi2c->Mode = HAL_I2C_MODE_MEM;

    hi2c->pBuffPtr = pData;
    hi2c->XferCount = Size;
    if(Size > 255)
    {
      hi2c->XferSize = 255;
    }
    else
    {
      hi2c->XferSize = Size;
    }

    /* Set the I2C DMA transfer complete callback */
    hi2c->hdmarx->XferCpltCallback = I2C_DMAMemReceiveCplt;

    /* Set the DMA error callback */
    hi2c->hdmarx->XferErrorCallback = I2C_DMAError;

    /* Enable the DMA channel */
    HAL_DMA_Start_IT(hi2c->hdmarx, (uint32_t)&hi2c->Instance->RXDR, (uint32_t)pData, hi2c->XferSize);

    /* Send Slave Address and Memory Address */
    if(I2C_RequestMemoryRead(hi2c, DevAddress, MemAddress, MemAddSize, I2C_TIMEOUT_FLAG, tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);
        return HAL_ERROR;
      }
      else
      {
        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);
        return HAL_TIMEOUT;
      }
    }

    /* Set NBYTES to write and reload if size > 255 and generate RESTART */
    if( (hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount) )
    {
      I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_RELOAD_MODE, I2C_GENERATE_START_READ);
    }
    else
    {
      I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_AUTOEND_MODE, I2C_GENERATE_START_READ);
    }

    /* Wait until RXNE flag is set */
    if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_RXNE, RESET, I2C_TIMEOUT_RXNE, tickstart) != HAL_OK)
    {
      return HAL_TIMEOUT;
    }

    /* Enable DMA Request */
    hi2c->Instance->CR1 |= I2C_CR1_RXDMAEN;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Checks if target device is ready for communication.
  * @note   This function is used with Memory devices
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  Trials Number of trials
  * @param  Timeout Timeout duration
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_IsDeviceReady(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint32_t Trials, uint32_t Timeout)
{
  uint32_t tickstart = 0;

  __IO uint32_t I2C_Trials = 0;

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BUSY) == SET)
    {
      return HAL_BUSY;
    }

    /* Process Locked */
    __HAL_LOCK(hi2c);

    hi2c->State = HAL_I2C_STATE_BUSY;
    hi2c->ErrorCode = HAL_I2C_ERROR_NONE;

    do
    {
      /* Generate Start */
      hi2c->Instance->CR2 = I2C_GENERATE_START(hi2c->Init.AddressingMode,DevAddress);

      /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
      /* Wait until STOPF flag is set or a NACK flag is set*/
      tickstart = HAL_GetTick();
      while((__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_STOPF) == RESET) && (__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_AF) == RESET) && (hi2c->State != HAL_I2C_STATE_TIMEOUT))
      {
      	if(Timeout != HAL_MAX_DELAY)
      	{
          if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
          {
            /* Device is ready */
            hi2c->State = HAL_I2C_STATE_READY;
            /* Process Unlocked */
            __HAL_UNLOCK(hi2c);
            return HAL_TIMEOUT;
          }
        }
      }

      /* Check if the NACKF flag has not been set */
      if (__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_AF) == RESET)
      {
        /* Wait until STOPF flag is reset */
        if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_STOPF, RESET, Timeout, tickstart) != HAL_OK)
        {
          return HAL_TIMEOUT;
        }

        /* Clear STOP Flag */
        __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

        /* Device is ready */
        hi2c->State = HAL_I2C_STATE_READY;

        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);

        return HAL_OK;
      }
      else
      {
        /* Wait until STOPF flag is reset */
        if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_STOPF, RESET, Timeout, tickstart) != HAL_OK)
        {
          return HAL_TIMEOUT;
        }

        /* Clear NACK Flag */
        __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);

        /* Clear STOP Flag, auto generated with autoend*/
        __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);
      }

      /* Check if the maximum allowed number of trials has been reached */
      if (I2C_Trials++ == Trials)
      {
        /* Generate Stop */
        hi2c->Instance->CR2 |= I2C_CR2_STOP;

        /* Wait until STOPF flag is reset */
        if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_STOPF, RESET, Timeout, tickstart) != HAL_OK)
        {
          return HAL_TIMEOUT;
        }

        /* Clear STOP Flag */
        __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);
      }
    }while(I2C_Trials < Trials);

    hi2c->State = HAL_I2C_STATE_READY;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    return HAL_TIMEOUT;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Sequential transmit in master I2C mode an amount of data in non-blocking mode with Interrupt.
  * @note   This interface allow to manage repeated start condition when a direction change during transfer
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @param  XferOptions Options of Transfer, value of @ref I2C_XferOptions_definition
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Master_Sequential_Transmit_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t XferOptions)
{
  /* Check the parameters */
  assert_param(IS_I2C_TRANSFER_OPTIONS_REQUEST(XferOptions));

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    /* Process Locked */
    __HAL_LOCK(hi2c);

    hi2c->State = HAL_I2C_STATE_BUSY_TX;
    hi2c->Mode = HAL_I2C_MODE_MASTER;
    hi2c->ErrorCode = HAL_I2C_ERROR_NONE;

    /* Prepare transfer parameters */
    hi2c->pBuffPtr = pData;
    hi2c->XferCount = Size;
    hi2c->XferOptions = XferOptions;

    if(Size > 255)
    {
      hi2c->XferSize = 255;
    }
    else
    {
      hi2c->XferSize = Size;
    }

    /* Send Slave Address */
    /* Set NBYTES to write and reload if size > 255 and generate RESTART */
    if((hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount))
    {
      I2C_TransferConfig(hi2c, DevAddress, hi2c->XferSize, I2C_RELOAD_MODE, I2C_GENERATE_START_WRITE);
    }
    else
    {
      /* If transfer direction not change, do not generate Restart Condition */
      /* Mean Previous state is same as current state */
      if(hi2c->PreviousState == I2C_STATE_SLAVE_BUSY_TX)
      {
        I2C_TransferConfig(hi2c, DevAddress, hi2c->XferSize, hi2c->XferOptions, I2C_NO_STARTSTOP);
      }
      /* Else transfer direction change, so generate Restart with new transfer direction */
      else
      {
        I2C_TransferConfig(hi2c, DevAddress, hi2c->XferSize, hi2c->XferOptions, I2C_GENERATE_START_WRITE);
      }
    }

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    /* Note : The I2C interrupts must be enabled after unlocking current process
              to avoid the risk of I2C interrupt handle execution before current
              process unlock */
    I2C_Enable_IRQ(hi2c, I2C_XFER_TX_IT);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Sequential receive in master I2C mode an amount of data in non-blocking mode with Interrupt
  * @note   This interface allow to manage repeated start condition when a direction change during transfer
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @param  XferOptions Options of Transfer, value of @ref I2C_XferOptions_definition
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Master_Sequential_Receive_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t XferOptions)
{
  /* Check the parameters */
  assert_param(IS_I2C_TRANSFER_OPTIONS_REQUEST(XferOptions));

  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    /* Process Locked */
    __HAL_LOCK(hi2c);

    hi2c->State = HAL_I2C_STATE_BUSY_RX;
    hi2c->Mode = HAL_I2C_MODE_MASTER;
    hi2c->ErrorCode = HAL_I2C_ERROR_NONE;

    /* Prepare transfer parameters */
    hi2c->pBuffPtr = pData;
    hi2c->XferCount = Size;
    hi2c->XferOptions = XferOptions;

    if(Size > 255)
    {
      hi2c->XferSize = 255;
    }
    else
    {
      hi2c->XferSize = Size;
    }

    /* Send Slave Address */
    /* Set NBYTES to write and reload if size > 255 and generate RESTART */
    if( (hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount) )
    {
      I2C_TransferConfig(hi2c,DevAddress, hi2c->XferSize, I2C_RELOAD_MODE, I2C_GENERATE_START_READ);
    }
    else
    {
      /* If transfer direction not change, do not generate Restart Condition */
      /* Mean Previous state is same as current state */
      if(hi2c->PreviousState == I2C_STATE_MASTER_BUSY_RX)
      {
        I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, hi2c->XferOptions, I2C_NO_STARTSTOP);
      }
      /* Else transfer direction change, so generate Restart with new transfer direction */
      else
      {
        I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, hi2c->XferOptions, I2C_GENERATE_START_READ);
      }
    }

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    /* Note : The I2C interrupts must be enabled after unlocking current process
              to avoid the risk of I2C interrupt handle execution before current
              process unlock */
    I2C_Enable_IRQ(hi2c, I2C_XFER_RX_IT);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Sequential transmit in slave/device I2C mode an amount of data in non-blocking mode with Interrupt
  * @note   This interface allow to manage repeated start condition when a direction change during transfer
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @param  XferOptions Options of Transfer, value of @ref I2C_XferOptions_definition
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Slave_Sequential_Transmit_IT(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t XferOptions)
{
  /* Check the parameters */
  assert_param(IS_I2C_TRANSFER_OPTIONS_REQUEST(XferOptions));

  if(hi2c->State == HAL_I2C_STATE_LISTEN)
  {
    if((pData == NULL) || (Size == 0))
    {
      return  HAL_ERROR;
    }

    /* Disable Interrupts, to prevent preemption during treatment in case of multicall */
    I2C_Disable_IRQ(hi2c, I2C_XFER_LISTEN_IT | I2C_XFER_TX_IT);

    /* Process Locked */
    __HAL_LOCK(hi2c);

    hi2c->State = HAL_I2C_STATE_BUSY_TX_LISTEN;
    hi2c->Mode = HAL_I2C_MODE_SLAVE;
    hi2c->ErrorCode = HAL_I2C_ERROR_NONE;

    /* Enable Address Acknowledge */
    hi2c->Instance->CR2 &= ~I2C_CR2_NACK;

    /* Prepare transfer parameters */
    hi2c->pBuffPtr = pData;
    hi2c->XferSize = Size;
    hi2c->XferCount = Size;
    hi2c->XferOptions = XferOptions;

    if(I2C_GET_DIR(hi2c) == I2C_DIRECTION_RECEIVE)
    {
      /* Clear ADDR flag after prepare the transfer parameters */
      /* This action will generate an acknowledge to the Master */
      __HAL_I2C_CLEAR_FLAG(hi2c,I2C_FLAG_ADDR);
    }

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    /* Note : The I2C interrupts must be enabled after unlocking current process
    to avoid the risk of I2C interrupt handle execution before current
    process unlock */
    /* REnable ADDR interrupt */
    I2C_Enable_IRQ(hi2c, I2C_XFER_TX_IT | I2C_XFER_LISTEN_IT);

    return HAL_OK;
  }
  else
  {
    return HAL_ERROR;
  }
}

/**
  * @brief  Sequential receive in slave/device I2C mode an amount of data in non-blocking mode with Interrupt
  * @note   This interface allow to manage repeated start condition when a direction change during transfer
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  pData Pointer to data buffer
  * @param  Size Amount of data to be sent
  * @param  XferOptions Options of Transfer, value of @ref I2C_XferOptions_definition
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Slave_Sequential_Receive_IT(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t XferOptions)
{
  /* Check the parameters */
  assert_param(IS_I2C_TRANSFER_OPTIONS_REQUEST(XferOptions));

  if(hi2c->State == HAL_I2C_STATE_LISTEN)
  {
    if((pData == NULL) || (Size == 0))
    {
      return  HAL_ERROR;
    }

    /* Disable Interrupts, to prevent preemption during treatment in case of multicall */
    I2C_Disable_IRQ(hi2c, I2C_XFER_LISTEN_IT | I2C_XFER_RX_IT);

    /* Process Locked */
    __HAL_LOCK(hi2c);

    hi2c->State = HAL_I2C_STATE_BUSY_RX_LISTEN;
    hi2c->Mode = HAL_I2C_MODE_SLAVE;
    hi2c->ErrorCode = HAL_I2C_ERROR_NONE;

    /* Enable Address Acknowledge */
    hi2c->Instance->CR2 &= ~I2C_CR2_NACK;

    /* Prepare transfer parameters */
    hi2c->pBuffPtr = pData;
    hi2c->XferSize = Size;
    hi2c->XferCount = Size;
    hi2c->XferOptions = XferOptions;

    if(I2C_GET_DIR(hi2c) == I2C_DIRECTION_TRANSMIT)
    {
      /* Clear ADDR flag after prepare the transfer parameters */
      /* This action will generate an acknowledge to the Master */
      __HAL_I2C_CLEAR_FLAG(hi2c,I2C_FLAG_ADDR);
    }

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    /* Note : The I2C interrupts must be enabled after unlocking current process
    to avoid the risk of I2C interrupt handle execution before current
    process unlock */
    /* REnable ADDR interrupt */
    I2C_Enable_IRQ(hi2c, I2C_XFER_RX_IT | I2C_XFER_LISTEN_IT);

    return HAL_OK;
  }
  else
  {
    return HAL_ERROR;
  }
}

/**
  * @brief  Enable the Address listen mode with Interrupt.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_EnableListen_IT(I2C_HandleTypeDef *hi2c)
{
  if(hi2c->State == HAL_I2C_STATE_READY)
  {
    hi2c->State = HAL_I2C_STATE_LISTEN;

    /* Enable the Address Match interrupt */
    I2C_Enable_IRQ(hi2c, I2C_XFER_LISTEN_IT);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Disable the Address listen mode with Interrupt.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_DisableListen_IT(I2C_HandleTypeDef *hi2c)
{
  /* Declaration of tmp to prevent undefined behavior of volatile usage */
  uint32_t tmp;

  /* Disable Address listen mode only if a transfer is not ongoing */
  if(hi2c->State == HAL_I2C_STATE_LISTEN)
  {
    tmp = (uint32_t)(hi2c->State) & I2C_STATE_MSK;
    hi2c->PreviousState = tmp | (uint32_t)(hi2c->Mode);
    hi2c->State = HAL_I2C_STATE_READY;
    hi2c->Mode = HAL_I2C_MODE_NONE;

    /* Disable the Address Match interrupt */
    I2C_Disable_IRQ(hi2c, I2C_XFER_LISTEN_IT);

    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Abort a master/host I2C process communication with Interrupt.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_I2C_Master_Abort_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress)
{
  if((hi2c->Mode == HAL_I2C_MODE_MASTER) || \
     ((hi2c->ErrorCode != HAL_I2C_ERROR_NONE) && (hi2c->Mode == HAL_I2C_MODE_MASTER)))
  {
    /* Process Locked */
    __HAL_LOCK(hi2c);

    /* Keep the same state as previous */
    /* to perform as well the call of the corresponding end of transfer callback */
    if((hi2c->PreviousState == I2C_STATE_MASTER_BUSY_TX) && (hi2c->ErrorCode != HAL_I2C_ERROR_NONE))
    {
      hi2c->State = HAL_I2C_STATE_BUSY_TX;
      hi2c->Mode = HAL_I2C_MODE_MASTER;
    }
    else if((hi2c->PreviousState == I2C_STATE_MASTER_BUSY_RX) && (hi2c->ErrorCode != HAL_I2C_ERROR_NONE))
    {
      hi2c->State = HAL_I2C_STATE_BUSY_RX;
      hi2c->Mode = HAL_I2C_MODE_MASTER;
    }

    hi2c->ErrorCode = HAL_I2C_ERROR_NONE;

    /* Set NBYTES to 1 to generate a dummy read on I2C peripheral */
    /* Set AUTOEND mode, this will generate a NACK then STOP condition to abort the current transfer */
    I2C_TransferConfig(hi2c, DevAddress, 1, I2C_AUTOEND_MODE, I2C_GENERATE_STOP);

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    /* Note : The I2C interrupts must be enabled after unlocking current process
              to avoid the risk of I2C interrupt handle execution before current
              process unlock */
    if((hi2c->State == HAL_I2C_STATE_BUSY_TX) && (hi2c->Mode == HAL_I2C_MODE_MASTER))
    {
      I2C_Enable_IRQ(hi2c, I2C_XFER_TX_IT);
    }
    if((hi2c->State == HAL_I2C_STATE_BUSY_RX) && (hi2c->Mode == HAL_I2C_MODE_MASTER))
    {
      I2C_Enable_IRQ(hi2c, I2C_XFER_RX_IT);
    }

    return HAL_OK;
  }
  else
  {
    /* Wrong usage of abort function */
    /* This function should be used only in case of abort monitored by master device */
    return HAL_ERROR;
  }
}

/**
  * @}
  */

/** @defgroup I2C_IRQ_Handler_and_Callbacks IRQ Handler and Callbacks
 * @{
 */

/**
  * @brief  This function handles I2C event interrupt request.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval None
  */
void HAL_I2C_EV_IRQHandler(I2C_HandleTypeDef *hi2c)
{
  uint32_t tmpisrvalue = 0;

  /* Use a local variable to store the current ISR flags */
  /* This action will avoid a wrong treatment due to ISR flags change during interrupt handler */
  tmpisrvalue = I2C_GET_ISR_REG(hi2c);

  /* I2C in mode Transmitter ---------------------------------------------------*/
  if (((I2C_CHECK_FLAG(tmpisrvalue, I2C_FLAG_TXIS) != RESET) || (I2C_CHECK_FLAG(tmpisrvalue, I2C_FLAG_TCR) != RESET) || (I2C_CHECK_FLAG(tmpisrvalue, I2C_FLAG_TC) != RESET) || (I2C_CHECK_FLAG(tmpisrvalue, I2C_FLAG_STOPF) != RESET) || (I2C_CHECK_FLAG(tmpisrvalue, I2C_FLAG_AF) != RESET)) && (__HAL_I2C_GET_IT_SOURCE(hi2c, (I2C_IT_TCI| I2C_IT_STOPI| I2C_IT_NACKI | I2C_IT_TXI)) != RESET))
  {
    /* Slave mode selected */
    if (hi2c->Mode  == HAL_I2C_MODE_SLAVE)
    {
      I2C_Slave_ISR(hi2c);
    }
    /* Master or Memory mode selected */
    else if ((hi2c->Mode == HAL_I2C_MODE_MASTER) || (hi2c->Mode == HAL_I2C_MODE_MEM))
    {
      I2C_Master_ISR(hi2c);
    }
  }

  /* I2C in mode Receiver ----------------------------------------------------*/
  if (((I2C_CHECK_FLAG(tmpisrvalue, I2C_FLAG_RXNE) != RESET) || (I2C_CHECK_FLAG(tmpisrvalue, I2C_FLAG_TCR) != RESET) || (I2C_CHECK_FLAG(tmpisrvalue, I2C_FLAG_TC) != RESET) || (I2C_CHECK_FLAG(tmpisrvalue, I2C_FLAG_STOPF) != RESET) || (I2C_CHECK_FLAG(tmpisrvalue, I2C_FLAG_AF) != RESET)) && (__HAL_I2C_GET_IT_SOURCE(hi2c, (I2C_IT_TCI| I2C_IT_STOPI| I2C_IT_NACKI | I2C_IT_RXI)) != RESET))
  {
    /* Slave mode selected */
    if (hi2c->Mode  == HAL_I2C_MODE_SLAVE)
    {
      I2C_Slave_ISR(hi2c);
    }
    /* Master or Memory mode selected */
    else if ((hi2c->Mode == HAL_I2C_MODE_MASTER) || (hi2c->Mode == HAL_I2C_MODE_MEM))
    {
      I2C_Master_ISR(hi2c);
    }
  }

  /* I2C in mode Listener Only --------------------------------------------------*/
  if (((I2C_CHECK_FLAG(tmpisrvalue, I2C_FLAG_ADDR) != RESET) || (I2C_CHECK_FLAG(tmpisrvalue, I2C_FLAG_STOPF) != RESET) || (I2C_CHECK_FLAG(tmpisrvalue, I2C_FLAG_AF) != RESET)) && ((__HAL_I2C_GET_IT_SOURCE(hi2c, I2C_IT_ADDRI) != RESET) || (__HAL_I2C_GET_IT_SOURCE(hi2c, I2C_IT_STOPI) != RESET) || (__HAL_I2C_GET_IT_SOURCE(hi2c, I2C_IT_NACKI) != RESET)))
  {
    if(hi2c->XferOptions != I2C_NO_OPTION_FRAME)
    {
      if((hi2c->State == HAL_I2C_STATE_LISTEN) || (hi2c->State == HAL_I2C_STATE_BUSY_TX_LISTEN) || (hi2c->State == HAL_I2C_STATE_BUSY_RX_LISTEN))
      {
        I2C_Slave_ISR(hi2c);
      }
    }
    else
    {
      if(hi2c->Mode == HAL_I2C_MODE_SLAVE)
      {
        I2C_Slave_ISR(hi2c);
      }
    }
  }
}

/**
  * @brief  This function handles I2C error interrupt request.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval None
  */
void HAL_I2C_ER_IRQHandler(I2C_HandleTypeDef *hi2c)
{
  /* I2C Bus error interrupt occurred ------------------------------------*/
  if((__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_BERR) == SET) && (__HAL_I2C_GET_IT_SOURCE(hi2c, I2C_IT_ERRI) == SET))
  {
    hi2c->ErrorCode |= HAL_I2C_ERROR_BERR;

    /* Clear BERR flag */
    __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_BERR);
  }

  /* I2C Over-Run/Under-Run interrupt occurred ----------------------------------------*/
  if((__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_OVR) == SET) && (__HAL_I2C_GET_IT_SOURCE(hi2c, I2C_IT_ERRI) == SET))
  {
    hi2c->ErrorCode |= HAL_I2C_ERROR_OVR;

    /* Clear OVR flag */
    __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_OVR);
  }

  /* I2C Arbitration Loss error interrupt occurred -------------------------------------*/
  if((__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_ARLO) == SET) && (__HAL_I2C_GET_IT_SOURCE(hi2c, I2C_IT_ERRI) == SET))
  {
    hi2c->ErrorCode |= HAL_I2C_ERROR_ARLO;

    /* Clear ARLO flag */
    __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_ARLO);
  }

  /* Call the Error Callback in case of Error detected */
  if((hi2c->ErrorCode & (HAL_I2C_ERROR_BERR | HAL_I2C_ERROR_OVR | HAL_I2C_ERROR_ARLO)) !=  HAL_I2C_ERROR_NONE)
  {
    if(((hi2c->State == HAL_I2C_STATE_BUSY_TX) || (hi2c->State == HAL_I2C_STATE_BUSY_RX)) && (hi2c->Mode == HAL_I2C_MODE_SLAVE))
    {
      /* Reset only HAL_I2C_STATE_SLAVE_BUSY_XX */
      /* keep HAL_I2C_STATE_LISTEN if set */
      hi2c->PreviousState = I2C_STATE_NONE;
      hi2c->State = HAL_I2C_STATE_LISTEN;
    }
    else
    {
      hi2c->PreviousState = I2C_STATE_NONE;
      hi2c->State = HAL_I2C_STATE_READY;
    }

    HAL_I2C_ErrorCallback(hi2c);
  }
}

/**
  * @brief  Master Tx Transfer completed callback.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval None
  */
__weak void HAL_I2C_MasterTxCpltCallback(I2C_HandleTypeDef *hi2c)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2c);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_I2C_MasterTxCpltCallback could be implemented in the user file
   */
}

/**
  * @brief  Master Rx Transfer completed callback.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval None
  */
__weak void HAL_I2C_MasterRxCpltCallback(I2C_HandleTypeDef *hi2c)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2c);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_I2C_MasterRxCpltCallback could be implemented in the user file
   */
}

/** @brief  Slave Tx Transfer completed callback.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval None
  */
__weak void HAL_I2C_SlaveTxCpltCallback(I2C_HandleTypeDef *hi2c)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2c);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_I2C_SlaveTxCpltCallback could be implemented in the user file
   */
}

/**
  * @brief  Slave Rx Transfer completed callback.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval None
  */
__weak void HAL_I2C_SlaveRxCpltCallback(I2C_HandleTypeDef *hi2c)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2c);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_I2C_SlaveRxCpltCallback could be implemented in the user file
   */
}

/**
  * @brief  Slave Address Match callback.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  TransferDirection: Master request Transfer Direction (Write/Read), value of @ref I2C_XferOptions_definition
  * @param  AddrMatchCode: Address Match Code
  * @retval None
  */
__weak void HAL_I2C_AddrCallback(I2C_HandleTypeDef *hi2c, uint8_t TransferDirection, uint16_t AddrMatchCode)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2c);
  UNUSED(TransferDirection);
  UNUSED(AddrMatchCode);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_I2C_AddrCallback() could be implemented in the user file
   */
}

/**
  * @brief  Listen Complete callback.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval None
  */
__weak void HAL_I2C_ListenCpltCallback(I2C_HandleTypeDef *hi2c)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2c);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_I2C_ListenCpltCallback() could be implemented in the user file
   */
}

/**
  * @brief  Memory Tx Transfer completed callback.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval None
  */
__weak void HAL_I2C_MemTxCpltCallback(I2C_HandleTypeDef *hi2c)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2c);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_I2C_MemTxCpltCallback could be implemented in the user file
   */
}

/**
  * @brief  Memory Rx Transfer completed callback.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval None
  */
__weak void HAL_I2C_MemRxCpltCallback(I2C_HandleTypeDef *hi2c)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2c);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_I2C_MemRxCpltCallback could be implemented in the user file
   */
}

/**
  * @brief  I2C error callback.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval None
  */
__weak void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *hi2c)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2c);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_I2C_ErrorCallback could be implemented in the user file
   */
}

/**
  * @}
  */

/** @defgroup I2C_Exported_Functions_Group3 Peripheral State, Mode and Error functions
 *  @brief   Peripheral State, Mode and Error functions
 *
@verbatim
 ===============================================================================
            ##### Peripheral State, Mode and Error functions #####
 ===============================================================================
    [..]
    This subsection permit to get in run-time the status of the peripheral
    and the data flow.

@endverbatim
  * @{
  */

/**
  * @brief  Return the I2C handle state.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval HAL state
  */
HAL_I2C_StateTypeDef HAL_I2C_GetState(I2C_HandleTypeDef *hi2c)
{
  /* Return I2C handle state */
  return hi2c->State;
}

/**
  * @brief  Returns the I2C Master, Slave, Memory or no mode.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *         the configuration information for I2C module
  * @retval HAL mode
  */
HAL_I2C_ModeTypeDef HAL_I2C_GetMode(I2C_HandleTypeDef *hi2c)
{
  return hi2c->Mode;
}

/**
* @brief  Return the I2C error code.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *              the configuration information for the specified I2C.
* @retval I2C Error Code
*/
uint32_t HAL_I2C_GetError(I2C_HandleTypeDef *hi2c)
{
  return hi2c->ErrorCode;
}

/**
  * @}
  */

/**
  * @}
  */

/** @addtogroup I2C_Private_Functions
  * @{
  */

/**
  * @brief  Interrupt Sub-Routine which handle the Interrupt Flags Master Mode.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval HAL status
  */
static HAL_StatusTypeDef I2C_Master_ISR(I2C_HandleTypeDef *hi2c)
{
  uint16_t DevAddress;

  /* Process Locked */
  __HAL_LOCK(hi2c);

  if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_AF) != RESET)
  {
    /* Clear NACK Flag */
    __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);

    /* Set corresponding Error Code */
    /* No need to generate STOP, it is automatically done */
    /* Error callback will be send during stop flag treatment */
    hi2c->ErrorCode |= HAL_I2C_ERROR_AF;

    /* If a pending TXIS flag is set */
    /* Write a dummy data in TXDR */
    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_TXIS) != RESET)
    {
       hi2c->Instance->TXDR = 0x00;
    }
  }
  else if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_RXNE) != RESET)
  {
    /* Read data from RXDR */
    (*hi2c->pBuffPtr++) = hi2c->Instance->RXDR;
    hi2c->XferSize--;
    hi2c->XferCount--;
  }
  else if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_TXIS) != RESET)
  {
    /* Write data to TXDR */
    hi2c->Instance->TXDR = (*hi2c->pBuffPtr++);
    hi2c->XferSize--;
    hi2c->XferCount--;
  }
  else if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_TCR) != RESET)
  {
    if((hi2c->XferSize == 0)&&(hi2c->XferCount!=0))
    {
      DevAddress = (hi2c->Instance->CR2 & I2C_CR2_SADD);

      if(hi2c->XferCount > 255)
      {
        I2C_TransferConfig(hi2c, DevAddress, 255, I2C_RELOAD_MODE, I2C_NO_STARTSTOP);
        hi2c->XferSize = 255;
      }
      else
      {
        hi2c->XferSize = hi2c->XferCount;
        if(hi2c->XferOptions != I2C_NO_OPTION_FRAME)
        {
          I2C_TransferConfig(hi2c, DevAddress, hi2c->XferSize, hi2c->XferOptions, I2C_NO_STARTSTOP);
        }
        else
        {
          I2C_TransferConfig(hi2c, DevAddress, hi2c->XferSize, I2C_AUTOEND_MODE, I2C_NO_STARTSTOP);
        }
      }
    }
    else
    {
      /* Call TxCpltCallback() if no stop mode is set */
      if((I2C_GET_STOP_MODE(hi2c) != I2C_AUTOEND_MODE)&&(hi2c->Mode == HAL_I2C_MODE_MASTER))
      {
        hi2c->Mode = HAL_I2C_MODE_NONE;

        if (hi2c->State == HAL_I2C_STATE_BUSY_TX)
        {
          hi2c->State = HAL_I2C_STATE_READY;
          hi2c->PreviousState = I2C_STATE_MASTER_BUSY_TX;

          /* Disable Interrupts */
          I2C_Disable_IRQ(hi2c, I2C_XFER_TX_IT);

          /* Process Unlocked */
          __HAL_UNLOCK(hi2c);

          /* Call the corresponding callback to inform upper layer of End of Transfer */
            HAL_I2C_MasterTxCpltCallback(hi2c);
        }
        /* hi2c->State == HAL_I2C_STATE_BUSY_RX */
        else
        {
          hi2c->State = HAL_I2C_STATE_READY;
          hi2c->PreviousState = I2C_STATE_MASTER_BUSY_RX;

          /* Disable Interrupts */
          I2C_Disable_IRQ(hi2c, I2C_XFER_RX_IT);

          /* Process Unlocked */
          __HAL_UNLOCK(hi2c);

          /* Call the corresponding callback to inform upper layer of End of Transfer */
          HAL_I2C_MasterRxCpltCallback(hi2c);
        }
      }
      else
      {
        hi2c->PreviousState = I2C_STATE_NONE;
        hi2c->State = HAL_I2C_STATE_READY;
        hi2c->Mode = HAL_I2C_MODE_NONE;

        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);

        /* Wrong size Status regarding TCR flag event */
        hi2c->ErrorCode |= HAL_I2C_ERROR_SIZE;
        HAL_I2C_ErrorCallback(hi2c);
      }
    }
  }
  else if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_TC) == SET)
  {
    if(hi2c->XferCount == 0)
    {
      if((I2C_GET_STOP_MODE(hi2c) != I2C_AUTOEND_MODE)&&(hi2c->Mode == HAL_I2C_MODE_MASTER))
      {
        hi2c->Mode = HAL_I2C_MODE_NONE;

        /* No Generate Stop, to permit restart mode */
        /* The stop will be done at the end of transfer, when I2C_AUTOEND_MODE enable */
        if (hi2c->State == HAL_I2C_STATE_BUSY_TX)
        {
          hi2c->PreviousState = I2C_STATE_MASTER_BUSY_TX;
          hi2c->State = HAL_I2C_STATE_READY;

          /* Disable Interrupts */
          I2C_Disable_IRQ(hi2c, I2C_XFER_TX_IT);

          /* Process Unlocked */
          __HAL_UNLOCK(hi2c);

          /* Call the corresponding callback to inform upper layer of End of Transfer */
          HAL_I2C_MasterTxCpltCallback(hi2c);
        }
        /* hi2c->State == HAL_I2C_STATE_BUSY_RX */
        else
        {
          hi2c->PreviousState = I2C_STATE_MASTER_BUSY_RX;
          hi2c->State = HAL_I2C_STATE_READY;

          /* Disable Interrupts */
          I2C_Disable_IRQ(hi2c, I2C_XFER_RX_IT);

          /* Process Unlocked */
          __HAL_UNLOCK(hi2c);

          /* Call the corresponding callback to inform upper layer of End of Transfer */
          HAL_I2C_MasterRxCpltCallback(hi2c);
        }
      }
    }
    else
    {
      /* Process Unlocked */
      __HAL_UNLOCK(hi2c);

      /* Wrong size Status regarding TC flag event */
      hi2c->ErrorCode |= HAL_I2C_ERROR_SIZE;

      /* Process Unlocked */
      __HAL_UNLOCK(hi2c);

      /* Call the corresponding callback to inform upper layer of End of Transfer */
      HAL_I2C_ErrorCallback(hi2c);
    }
  }

  if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_STOPF) != RESET)
  {
    if(hi2c->State == HAL_I2C_STATE_BUSY_TX)
    {
      if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_AF) == SET)
      {
        /* Clear NACK Flag */
        __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);

        hi2c->ErrorCode |= HAL_I2C_ERROR_AF;

        /* If a pending TXIS flag is set */
        /* Write a dummy data in TXDR to clear it */
        if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_TXIS) != RESET)
        {
           hi2c->Instance->TXDR = 0x00;
        }
      }

      /* Disable Interrupts */
      I2C_Disable_IRQ(hi2c, I2C_XFER_TX_IT);

      /* Clear STOP Flag */
      __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

      /* Clear Configuration Register 2 */
      I2C_RESET_CR2(hi2c);

      /* Flush TX register if not empty */
      if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_TXE) == RESET)
      {
        __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_TXE);
      }

      /* Call the corresponding callback to inform upper layer of End of Transfer */
      if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
      {
        hi2c->PreviousState = I2C_STATE_NONE;
        hi2c->State = HAL_I2C_STATE_READY;
        hi2c->Mode = HAL_I2C_MODE_NONE;

        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);

        /* Call the corresponding callback to inform upper layer of End of Transfer */
        HAL_I2C_ErrorCallback(hi2c);
      }
      else
      {
        if (hi2c->Mode == HAL_I2C_MODE_MEM)
        {
          hi2c->PreviousState = I2C_STATE_NONE;
          hi2c->State = HAL_I2C_STATE_READY;
          hi2c->Mode = HAL_I2C_MODE_NONE;

          /* Process Unlocked */
          __HAL_UNLOCK(hi2c);

          /* Call the corresponding callback to inform upper layer of End of Transfer */
          HAL_I2C_MemTxCpltCallback(hi2c);
        }
        else
        {
          hi2c->PreviousState = I2C_STATE_MASTER_BUSY_TX;
          hi2c->State = HAL_I2C_STATE_READY;
          hi2c->Mode = HAL_I2C_MODE_NONE;

          /* Process Unlocked */
          __HAL_UNLOCK(hi2c);

          /* Call the corresponding callback to inform upper layer of End of Transfer */
          HAL_I2C_MasterTxCpltCallback(hi2c);
        }
      }
    }
    else if(hi2c->State == HAL_I2C_STATE_BUSY_RX)
    {
      if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_AF) == SET)
      {
        /* Clear NACK Flag */
        __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);

        hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
      }

      /* Disable Interrupts */
      I2C_Disable_IRQ(hi2c, I2C_XFER_RX_IT);

      /* Clear STOP Flag */
      __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

      /* Clear Configuration Register 2 */
      I2C_RESET_CR2(hi2c);

      /* Call the corresponding callback to inform upper layer of End of Transfer */
      if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
      {
        hi2c->PreviousState = I2C_STATE_NONE;
        hi2c->State = HAL_I2C_STATE_READY;
        hi2c->Mode = HAL_I2C_MODE_NONE;

        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);

        HAL_I2C_ErrorCallback(hi2c);
      }
      else
      {
        if (hi2c->Mode == HAL_I2C_MODE_MEM)
        {
          hi2c->PreviousState = I2C_STATE_NONE;
          hi2c->State = HAL_I2C_STATE_READY;
          hi2c->Mode = HAL_I2C_MODE_NONE;

          /* Process Unlocked */
          __HAL_UNLOCK(hi2c);

          HAL_I2C_MemRxCpltCallback(hi2c);
        }
        else
        {
          hi2c->PreviousState = I2C_STATE_MASTER_BUSY_RX;
          hi2c->State = HAL_I2C_STATE_READY;
          hi2c->Mode = HAL_I2C_MODE_NONE;

          /* Process Unlocked */
          __HAL_UNLOCK(hi2c);

          HAL_I2C_MasterRxCpltCallback(hi2c);
        }
      }
    }
  }

  /* Process Unlocked */
  __HAL_UNLOCK(hi2c);

  return HAL_OK;
}

/**
  * @brief  Interrupt Sub-Routine which handle the Interrupt Flags Slave Mode.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @retval HAL status
  */
static HAL_StatusTypeDef I2C_Slave_ISR(I2C_HandleTypeDef *hi2c)
{
  uint8_t TransferDirection = 0;
  uint16_t SlaveAddrCode = 0;
  uint16_t OwnAdd1Code = 0;
  uint16_t OwnAdd2Code = 0;

  /* Process locked */
  __HAL_LOCK(hi2c);

  if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_AF) != RESET)
  {
    /* Check that I2C transfer finished */
    /* if yes, normal use case, a NACK is sent by the MASTER when Transfer is finished */
    /* Mean XferCount == 0*/
    /* So clear Flag NACKF only */
    if(hi2c->XferCount == 0)
    {
      if(((hi2c->XferOptions == I2C_FIRST_AND_LAST_FRAME) || (hi2c->XferOptions == I2C_LAST_FRAME)) && \
        (hi2c->State == HAL_I2C_STATE_LISTEN))
      {
        hi2c->XferOptions = I2C_NO_OPTION_FRAME;

        hi2c->PreviousState = I2C_STATE_NONE;
        hi2c->State = HAL_I2C_STATE_READY;
        hi2c->Mode = HAL_I2C_MODE_NONE;

        /* Store Last receive data if any */
        if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_RXNE) == SET)
        {
          /* Read data from RXDR */
          (*hi2c->pBuffPtr++) = hi2c->Instance->RXDR;
          hi2c->XferSize--;
          hi2c->XferCount--;
        }

        /* Disable all Interrupts*/
        I2C_Disable_IRQ(hi2c, I2C_XFER_LISTEN_IT | I2C_XFER_RX_IT | I2C_XFER_TX_IT);

        /* Clear NACK Flag */
        __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);

        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);

        /* Call the Listen Complete callback, to inform upper layer of the end of Listen usecase */
        HAL_I2C_ListenCpltCallback(hi2c);
      }
      else if((hi2c->XferOptions != I2C_NO_OPTION_FRAME) && (hi2c->State == HAL_I2C_STATE_BUSY_TX_LISTEN))
      {
        /* Last Byte is Transmitted */
        /* Remove HAL_I2C_STATE_SLAVE_BUSY_TX, keep only HAL_I2C_STATE_LISTEN */
        hi2c->PreviousState = I2C_STATE_SLAVE_BUSY_TX;
        hi2c->State = HAL_I2C_STATE_LISTEN;
        hi2c->Mode = HAL_I2C_MODE_NONE;

        /* Disable all Interrupts*/
        I2C_Disable_IRQ(hi2c, I2C_XFER_TX_IT);

        /* Clear NACK Flag */
        __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);

        /* Check if TXIS flag is SET */
        if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_TXIS) != RESET)
        {
          /* Send a dummy data, to clear TXIS event */
          hi2c->Instance->TXDR = 0x00;

          /* Flush TX register if not empty */
          if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_TXE) == RESET)
          {
            __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_TXE);
          }
        }

        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);

        /* Call the Tx complete callback to inform upper layer of the end of transmit process */
        HAL_I2C_SlaveTxCpltCallback(hi2c);
      }
      else
      {
        /* Clear NACK Flag */
        __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);

        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);
      }
    }
    else
    {
      /* if no, error use case, a Non-Acknowledge of last Data is generated by the MASTER*/
      /* Clear NACK Flag */
      __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);

      if(hi2c->XferOptions != I2C_NO_OPTION_FRAME)
      {
        /* Set HAL State to "Idle" State, mean to LISTEN state */
        /* So reset Slave Busy state */
        hi2c->PreviousState = I2C_STATE_NONE;
        hi2c->State = HAL_I2C_STATE_LISTEN;
        hi2c->Mode = HAL_I2C_MODE_NONE;

        /* Disable RX/TX Interrupts, keep only ADDR Interrupt */
        I2C_Disable_IRQ(hi2c, I2C_XFER_RX_IT | I2C_XFER_TX_IT);
      }

      /* Set ErrorCode corresponding to a Non-Acknowledge */
      hi2c->ErrorCode |= HAL_I2C_ERROR_AF;

      /* Process Unlocked */
      __HAL_UNLOCK(hi2c);

      /* Call the Error callback to prevent upper layer */
      HAL_I2C_ErrorCallback(hi2c);
    }
  }
  else if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_RXNE) != RESET)
  {
    /* Read data from RXDR */
    (*hi2c->pBuffPtr++) = hi2c->Instance->RXDR;
    hi2c->XferSize--;
    hi2c->XferCount--;

    if((hi2c->XferCount == 0)&&(hi2c->XferOptions != I2C_NO_OPTION_FRAME))
    {
        /* Last Byte is received, disable Interrupt */
        I2C_Disable_IRQ(hi2c, I2C_XFER_RX_IT);

        /* Remove HAL_I2C_STATE_SLAVE_BUSY_RX, keep only HAL_I2C_STATE_LISTEN */
        hi2c->PreviousState = I2C_STATE_SLAVE_BUSY_RX;
        hi2c->State = HAL_I2C_STATE_LISTEN;
        hi2c->Mode = HAL_I2C_MODE_NONE;

        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);

        /* Call the Rx complete callback to inform upper layer of the end of receive process */
        HAL_I2C_SlaveRxCpltCallback(hi2c);
    }

    if((hi2c->XferCount == 0)                     && \
       (hi2c->XferOptions != I2C_NO_OPTION_FRAME) && \
       (hi2c->State == HAL_I2C_STATE_BUSY_RX_LISTEN))
    {
      /* Last Byte is received, disable Interrupt */
      I2C_Disable_IRQ(hi2c, I2C_XFER_RX_IT);

      /* Remove HAL_I2C_STATE_SLAVE_BUSY_RX, keep only HAL_I2C_STATE_LISTEN */
      hi2c->PreviousState = I2C_STATE_SLAVE_BUSY_RX;
      hi2c->State = HAL_I2C_STATE_LISTEN;
      hi2c->Mode = HAL_I2C_MODE_NONE;

      /* Process Unlocked */
      __HAL_UNLOCK(hi2c);
    }
  }
  else if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_ADDR) != RESET)
  {
    /* Disable ADDR interrupt to prevent multiple ADDRInterrupt*/
    /* Other ADDRInterrupt will be treat in next Listen usecase */
    if(hi2c->XferOptions != I2C_NO_OPTION_FRAME)
    {
      TransferDirection = I2C_GET_DIR(hi2c);
      SlaveAddrCode = I2C_GET_ADDR_MATCH(hi2c);
      OwnAdd1Code = I2C_GET_OWN_ADDRESS1(hi2c);
      OwnAdd2Code = I2C_GET_OWN_ADDRESS2(hi2c);

      /* If 10bits addressing mode is selected */
      if(hi2c->Init.AddressingMode == I2C_ADDRESSINGMODE_10BIT)
      {
        if((SlaveAddrCode & SlaveAddr_MSK) == ((OwnAdd1Code >> SlaveAddr_SHIFT) & SlaveAddr_MSK))
        {
          SlaveAddrCode = OwnAdd1Code;
          hi2c->AddrEventCount++;
          if(hi2c->AddrEventCount == 2)
          {
            /* Reset Address Event counter  */
            hi2c->AddrEventCount = 0;

            /* Clear ADDR flag */
            __HAL_I2C_CLEAR_FLAG(hi2c,I2C_FLAG_ADDR);

            /* Process Unlocked */
            __HAL_UNLOCK(hi2c);

            /* Call Slave Addr callback */
            HAL_I2C_AddrCallback(hi2c, TransferDirection, SlaveAddrCode);
          }
        }
        else
        {
          SlaveAddrCode = OwnAdd2Code;

          /* Disable ADDR Interrupts */
          I2C_Disable_IRQ(hi2c, I2C_XFER_LISTEN_IT);

          /* Process Unlocked */
          __HAL_UNLOCK(hi2c);

          /* Call Slave Addr callback */
          HAL_I2C_AddrCallback(hi2c, TransferDirection, SlaveAddrCode);
        }
      }
      /* else 7 bits addressing mode is selected */
      else
      {
        /* Disable ADDR Interrupts */
        I2C_Disable_IRQ(hi2c, I2C_XFER_LISTEN_IT);

        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);

        /* Call Slave Addr callback */
        HAL_I2C_AddrCallback(hi2c, TransferDirection, SlaveAddrCode);
      }
    }
    else
    {
      /* Clear ADDR flag */
      __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_ADDR);

      /* Process Unlocked */
      __HAL_UNLOCK(hi2c);
    }
  }
  else if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_TXIS) != RESET)
  {
    /* Write data to TXDR only if XferCount not reach "0" */
    /* A TXIS flag can be set, during STOP treatment      */
    /* Check if all Datas have already been sent */
    /* If it is the case, this last write in TXDR is not sent, correspond to a dummy TXIS event */
    if(hi2c->XferCount > 0)
    {
      /* Write data to TXDR */
      hi2c->Instance->TXDR = (*hi2c->pBuffPtr++);
      hi2c->XferCount--;
      hi2c->XferSize--;

      /* Process Unlocked */
      __HAL_UNLOCK(hi2c);
    }
    else
    {
      if(((hi2c->XferOptions == I2C_NEXT_FRAME) || (hi2c->XferOptions == I2C_FIRST_FRAME)) && (hi2c->State == HAL_I2C_STATE_BUSY_TX_LISTEN))
      {
        /* Last Byte is Transmitted */
        /* Remove HAL_I2C_STATE_SLAVE_BUSY_TX, keep only HAL_I2C_STATE_LISTEN */
        I2C_Disable_IRQ(hi2c, I2C_XFER_TX_IT);
        hi2c->PreviousState = I2C_STATE_SLAVE_BUSY_TX;
        hi2c->State = HAL_I2C_STATE_LISTEN;
        hi2c->Mode = HAL_I2C_MODE_NONE;

        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);

        /* Call the Tx complete callback to inform upper layer of the end of transmit process */
        HAL_I2C_SlaveTxCpltCallback(hi2c);
      }
    }
  }

  /* Check if STOPF is set */
  if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_STOPF) != RESET)
  {
    /* Disable all interrupts */
    I2C_Disable_IRQ(hi2c, I2C_XFER_LISTEN_IT | I2C_XFER_TX_IT | I2C_XFER_RX_IT);

    /* Disable Address Acknowledge */
    hi2c->Instance->CR2 |= I2C_CR2_NACK;

    /* Clear Configuration Register 2 */
    I2C_RESET_CR2(hi2c);

    /* Flush TX register if not empty */
    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_TXE) == RESET)
    {
      __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_TXE);
    }

    /* Store Last receive data if any */
    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_RXNE) == SET)
    {
      /* Read data from RXDR */
      (*hi2c->pBuffPtr++) = hi2c->Instance->RXDR;
      hi2c->XferSize--;
      hi2c->XferCount--;
    }

    /* Clear STOP Flag */
    __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

    /* Clear ADDR flag */
    __HAL_I2C_CLEAR_FLAG(hi2c,I2C_FLAG_ADDR);

    hi2c->PreviousState = I2C_STATE_NONE;
    hi2c->Mode = HAL_I2C_MODE_NONE;

    if(hi2c->XferOptions != I2C_NO_OPTION_FRAME)
    {
      hi2c->XferOptions = 0;
      hi2c->State = HAL_I2C_STATE_READY;

      /* Process Unlocked */
      __HAL_UNLOCK(hi2c);

      /* Call the Listen Complete callback, to prevent upper layer of the end of Listen usecase */
      HAL_I2C_ListenCpltCallback(hi2c);
    }
    else
    {
      if(hi2c->State == HAL_I2C_STATE_BUSY_RX)
      {
        hi2c->State = HAL_I2C_STATE_READY;

        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);

        /* Call the Slave Rx Complete callback */
        HAL_I2C_SlaveRxCpltCallback(hi2c);
      }
      else
      {
        hi2c->State = HAL_I2C_STATE_READY;

        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);

        /* Call the Slave Tx Complete callback */
        HAL_I2C_SlaveTxCpltCallback(hi2c);
      }
    }
  }

  /* Process Unlocked */
  __HAL_UNLOCK(hi2c);

  return HAL_OK;
}

/**
  * @brief  Master sends target device address followed by internal memory address for write request.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  MemAddress Internal memory address
  * @param  MemAddSize Size of internal memory address
  * @param  Timeout Timeout duration
  * @param  Tickstart Tick start value
  * @retval HAL status
  */
static HAL_StatusTypeDef I2C_RequestMemoryWrite(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint32_t Timeout, uint32_t Tickstart)
{
  I2C_TransferConfig(hi2c,DevAddress,MemAddSize, I2C_RELOAD_MODE, I2C_GENERATE_START_WRITE);

  /* Wait until TXIS flag is set */
  if(I2C_WaitOnTXISFlagUntilTimeout(hi2c, Timeout, Tickstart) != HAL_OK)
  {
    if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
    {
      return HAL_ERROR;
    }
    else
    {
      return HAL_TIMEOUT;
    }
  }

  /* If Memory address size is 8Bit */
  if(MemAddSize == I2C_MEMADD_SIZE_8BIT)
  {
    /* Send Memory Address */
    hi2c->Instance->TXDR = I2C_MEM_ADD_LSB(MemAddress);
  }
  /* If Memory address size is 16Bit */
  else
  {
    /* Send MSB of Memory Address */
    hi2c->Instance->TXDR = I2C_MEM_ADD_MSB(MemAddress);

    /* Wait until TXIS flag is set */
    if(I2C_WaitOnTXISFlagUntilTimeout(hi2c, Timeout, Tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        return HAL_ERROR;
      }
      else
      {
        return HAL_TIMEOUT;
      }
    }

    /* Send LSB of Memory Address */
    hi2c->Instance->TXDR = I2C_MEM_ADD_LSB(MemAddress);
  }

  /* Wait until TCR flag is set */
  if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_TCR, RESET, Timeout, Tickstart) != HAL_OK)
  {
    return HAL_TIMEOUT;
  }

return HAL_OK;
}

/**
  * @brief  Master sends target device address followed by internal memory address for read request.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  DevAddress Target device address
  * @param  MemAddress Internal memory address
  * @param  MemAddSize Size of internal memory address
  * @param  Timeout Timeout duration
  * @param  Tickstart Tick start value
  * @retval HAL status
  */
static HAL_StatusTypeDef I2C_RequestMemoryRead(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint32_t Timeout, uint32_t Tickstart)
{
  I2C_TransferConfig(hi2c,DevAddress,MemAddSize, I2C_SOFTEND_MODE, I2C_GENERATE_START_WRITE);

  /* Wait until TXIS flag is set */
  if(I2C_WaitOnTXISFlagUntilTimeout(hi2c, Timeout, Tickstart) != HAL_OK)
  {
    if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
    {
      return HAL_ERROR;
    }
    else
    {
      return HAL_TIMEOUT;
    }
  }

  /* If Memory address size is 8Bit */
  if(MemAddSize == I2C_MEMADD_SIZE_8BIT)
  {
    /* Send Memory Address */
    hi2c->Instance->TXDR = I2C_MEM_ADD_LSB(MemAddress);
  }
  /* If Memory address size is 16Bit */
  else
  {
    /* Send MSB of Memory Address */
    hi2c->Instance->TXDR = I2C_MEM_ADD_MSB(MemAddress);

    /* Wait until TXIS flag is set */
    if(I2C_WaitOnTXISFlagUntilTimeout(hi2c, Timeout, Tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        return HAL_ERROR;
      }
      else
      {
        return HAL_TIMEOUT;
      }
    }

    /* Send LSB of Memory Address */
    hi2c->Instance->TXDR = I2C_MEM_ADD_LSB(MemAddress);
  }

  /* Wait until TC flag is set */
  if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_TC, RESET, Timeout, Tickstart) != HAL_OK)
  {
    return HAL_TIMEOUT;
  }

  return HAL_OK;
}

/**
  * @brief  DMA I2C master transmit process complete callback.
  * @param  hdma DMA handle
  * @retval None
  */
static void I2C_DMAMasterTransmitCplt(DMA_HandleTypeDef *hdma)
{
  uint32_t tickstart = 0;
  uint16_t DevAddress;
  I2C_HandleTypeDef* hi2c = (I2C_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;

  /* Init tickstart for timeout managment*/
  tickstart = HAL_GetTick();

  /* Check if last DMA request was done with RELOAD */
  /* Set NBYTES to write and reload if size > 255 */
  if( (hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount) )
  {
    /* Wait until TCR flag is set */
    if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_TCR, RESET, I2C_TIMEOUT_TCR, tickstart) != HAL_OK)
    {
      hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
    }

    /* Disable DMA Request */
    hi2c->Instance->CR1 &= ~I2C_CR1_TXDMAEN;

    /* Check if Errors has been detected during transfer */
    if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
    {
      /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
      /* Wait until STOPF flag is reset */
      if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, I2C_TIMEOUT_STOPF, tickstart) != HAL_OK)
      {
        if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
        {
          hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
        }
        else
        {
          hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
        }
      }

      /* Clear STOP Flag */
      __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

      /* Clear Configuration Register 2 */
      I2C_RESET_CR2(hi2c);

      hi2c->XferCount = 0;

      hi2c->State = HAL_I2C_STATE_READY;
      hi2c->Mode = HAL_I2C_MODE_NONE;

      HAL_I2C_ErrorCallback(hi2c);
    }
    else
    {
      hi2c->pBuffPtr += hi2c->XferSize;
      hi2c->XferCount -= hi2c->XferSize;
      if(hi2c->XferCount > 255)
      {
        hi2c->XferSize = 255;
      }
      else
      {
        hi2c->XferSize = hi2c->XferCount;
      }

      DevAddress = (hi2c->Instance->CR2 & I2C_CR2_SADD);

      /* Enable the DMA channel */
      HAL_DMA_Start_IT(hi2c->hdmatx, (uint32_t)hi2c->pBuffPtr, (uint32_t)&hi2c->Instance->TXDR, hi2c->XferSize);

      /* Send Slave Address */
      /* Set NBYTES to write and reload if size > 255 */
      if( (hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount) )
      {
        I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_RELOAD_MODE, I2C_NO_STARTSTOP);
      }
      else
      {
        I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_AUTOEND_MODE, I2C_NO_STARTSTOP);
      }

      /* Wait until TXIS flag is set */
      if(I2C_WaitOnTXISFlagUntilTimeout(hi2c, I2C_TIMEOUT_TXIS, tickstart) != HAL_OK)
      {
        /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
        /* Wait until STOPF flag is reset */
        if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, I2C_TIMEOUT_STOPF, tickstart) != HAL_OK)
        {
          if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
          {
            hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
          }
          else
          {
            hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
          }
        }

        /* Clear STOP Flag */
        __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

        /* Clear Configuration Register 2 */
        I2C_RESET_CR2(hi2c);

        hi2c->XferCount = 0;

        hi2c->State = HAL_I2C_STATE_READY;
        hi2c->Mode = HAL_I2C_MODE_NONE;

        HAL_I2C_ErrorCallback(hi2c);
      }
      else
      {
        /* Enable DMA Request */
        hi2c->Instance->CR1 |= I2C_CR1_TXDMAEN;
      }
    }
  }
  else
  {
    /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
    /* Wait until STOPF flag is reset */
    if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, I2C_TIMEOUT_STOPF, tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
      }
      else
      {
        hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
      }
    }

    /* Clear STOP Flag */
    __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

    /* Clear Configuration Register 2 */
    I2C_RESET_CR2(hi2c);

    /* Disable DMA Request */
    hi2c->Instance->CR1 &= ~I2C_CR1_TXDMAEN;

    hi2c->XferCount = 0;

    hi2c->State = HAL_I2C_STATE_READY;
    hi2c->Mode = HAL_I2C_MODE_NONE;

   /* Check if Errors has been detected during transfer */
    if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
    {
      HAL_I2C_ErrorCallback(hi2c);
    }
    else
    {
      HAL_I2C_MasterTxCpltCallback(hi2c);
    }
  }
}

/**
  * @brief  DMA I2C slave transmit process complete callback.
  * @param  hdma DMA handle
  * @retval None
  */
static void I2C_DMASlaveTransmitCplt(DMA_HandleTypeDef *hdma)
{
  uint32_t tickstart = 0;
  I2C_HandleTypeDef* hi2c = (I2C_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;

  /* Init tickstart for timeout managment*/
  tickstart = HAL_GetTick();

  /* Wait until STOP flag is set */
  if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, I2C_TIMEOUT_STOPF, tickstart) != HAL_OK)
  {
    if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
    {
      /* Normal Use case, a AF is generated by master */
      /* to inform slave the end of transfer */
      hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
    }
    else
    {
      hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
    }
  }

  /* Clear STOP flag */
  __HAL_I2C_CLEAR_FLAG(hi2c,I2C_FLAG_STOPF);

  /* Wait until BUSY flag is reset */
  if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY, tickstart) != HAL_OK)
  {
    hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
  }

  /* Disable DMA Request */
  hi2c->Instance->CR1 &= ~I2C_CR1_TXDMAEN;

  hi2c->XferCount = 0;

  hi2c->State = HAL_I2C_STATE_READY;
  hi2c->Mode = HAL_I2C_MODE_NONE;

  /* Check if Errors has been detected during transfer */
  if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
  {
    HAL_I2C_ErrorCallback(hi2c);
  }
  else
  {
    HAL_I2C_SlaveTxCpltCallback(hi2c);
  }
}

/**
  * @brief DMA I2C master receive process complete callback.
  * @param  hdma DMA handle
  * @retval None
  */
static void I2C_DMAMasterReceiveCplt(DMA_HandleTypeDef *hdma)
{
  uint32_t tickstart = 0;
  I2C_HandleTypeDef* hi2c = (I2C_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;
  uint16_t DevAddress;

  /* Init tickstart for timeout managment*/
  tickstart = HAL_GetTick();

  /* Check if last DMA request was done with RELOAD */
  /* Set NBYTES to write and reload if size > 255 */
  if( (hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount) )
  {
    /* Wait until TCR flag is set */
    if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_TCR, RESET, I2C_TIMEOUT_TCR, tickstart) != HAL_OK)
    {
      hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
    }

    /* Disable DMA Request */
    hi2c->Instance->CR1 &= ~I2C_CR1_RXDMAEN;

    /* Check if Errors has been detected during transfer */
    if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
    {
      /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
      /* Wait until STOPF flag is reset */
      if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, I2C_TIMEOUT_STOPF, tickstart) != HAL_OK)
      {
        if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
        {
          hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
        }
        else
        {
          hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
        }
      }

      /* Clear STOP Flag */
      __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

      /* Clear Configuration Register 2 */
      I2C_RESET_CR2(hi2c);

      hi2c->XferCount = 0;

      hi2c->State = HAL_I2C_STATE_READY;
      hi2c->Mode = HAL_I2C_MODE_NONE;

      HAL_I2C_ErrorCallback(hi2c);
    }
    else
    {
      hi2c->pBuffPtr += hi2c->XferSize;
      hi2c->XferCount -= hi2c->XferSize;
      if(hi2c->XferCount > 255)
      {
        hi2c->XferSize = 255;
      }
      else
      {
        hi2c->XferSize = hi2c->XferCount;
      }

      DevAddress = (hi2c->Instance->CR2 & I2C_CR2_SADD);

      /* Enable the DMA channel */
      HAL_DMA_Start_IT(hi2c->hdmarx, (uint32_t)&hi2c->Instance->RXDR, (uint32_t)hi2c->pBuffPtr, hi2c->XferSize);

      /* Send Slave Address */
      /* Set NBYTES to write and reload if size > 255 */
      if( (hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount) )
      {
        I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_RELOAD_MODE, I2C_NO_STARTSTOP);
      }
      else
      {
        I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_AUTOEND_MODE, I2C_NO_STARTSTOP);
      }

      /* Wait until RXNE flag is set */
      if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_RXNE, RESET, I2C_TIMEOUT_RXNE, tickstart) != HAL_OK)
      {
        hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
      }

      /* Check if Errors has been detected during transfer */
      if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
      {
        /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
        /* Wait until STOPF flag is reset */
        if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, I2C_TIMEOUT_STOPF, tickstart) != HAL_OK)
        {
          if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
          {
            hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
          }
          else
          {
            hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
          }
        }

        /* Clear STOP Flag */
        __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

        /* Clear Configuration Register 2 */
        I2C_RESET_CR2(hi2c);

        hi2c->XferCount = 0;

        hi2c->State = HAL_I2C_STATE_READY;
        hi2c->Mode = HAL_I2C_MODE_NONE;

        HAL_I2C_ErrorCallback(hi2c);
      }
      else
      {
        /* Enable DMA Request */
        hi2c->Instance->CR1 |= I2C_CR1_RXDMAEN;
      }
    }
  }
  else
  {
    /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
    /* Wait until STOPF flag is reset */
    if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, I2C_TIMEOUT_STOPF, tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
      }
      else
      {
        hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
      }
    }

    /* Clear STOP Flag */
    __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

    /* Clear Configuration Register 2 */
    I2C_RESET_CR2(hi2c);

    /* Disable DMA Request */
    hi2c->Instance->CR1 &= ~I2C_CR1_RXDMAEN;

    hi2c->XferCount = 0;

    hi2c->State = HAL_I2C_STATE_READY;
    hi2c->Mode = HAL_I2C_MODE_NONE;

    /* Check if Errors has been detected during transfer */
    if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
    {
      HAL_I2C_ErrorCallback(hi2c);
    }
    else
    {
      HAL_I2C_MasterRxCpltCallback(hi2c);
    }
  }
}

/**
  * @brief  DMA I2C slave receive process complete callback.
  * @param  hdma DMA handle
  * @retval None
  */
static void I2C_DMASlaveReceiveCplt(DMA_HandleTypeDef *hdma)
{
  uint32_t tickstart = 0;
  I2C_HandleTypeDef* hi2c = (I2C_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;

  /* Init tickstart for timeout managment*/
  tickstart = HAL_GetTick();

  /* Wait until STOPF flag is reset */
  if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, I2C_TIMEOUT_STOPF, tickstart) != HAL_OK)
  {
    if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
    {
      hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
    }
    else
    {
      hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
    }
  }

  /* Clear STOPF flag */
  __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

  /* Wait until BUSY flag is reset */
  if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_BUSY, SET, I2C_TIMEOUT_BUSY, tickstart) != HAL_OK)
  {
    hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
  }

  /* Disable DMA Request */
  hi2c->Instance->CR1 &= ~I2C_CR1_RXDMAEN;

  /* Disable Address Acknowledge */
  hi2c->Instance->CR2 |= I2C_CR2_NACK;

  hi2c->XferCount = 0;

  hi2c->State = HAL_I2C_STATE_READY;
  hi2c->Mode = HAL_I2C_MODE_NONE;

  /* Check if Errors has been detected during transfer */
  if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
  {
    HAL_I2C_ErrorCallback(hi2c);
  }
  else
  {
    HAL_I2C_SlaveRxCpltCallback(hi2c);
  }
}

/**
  * @brief DMA I2C Memory Write process complete callback.
  * @param hdma DMA handle
  * @retval None
  */
static void I2C_DMAMemTransmitCplt(DMA_HandleTypeDef *hdma)
{
  uint32_t tickstart = 0;
  uint16_t DevAddress;
  I2C_HandleTypeDef* hi2c = ( I2C_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;

  /* Init tickstart for timeout managment*/
  tickstart = HAL_GetTick();

  /* Check if last DMA request was done with RELOAD */
  /* Set NBYTES to write and reload if size > 255 */
  if( (hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount) )
  {
    /* Wait until TCR flag is set */
    if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_TCR, RESET, I2C_TIMEOUT_TCR, tickstart) != HAL_OK)
    {
      hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
    }

    /* Disable DMA Request */
    hi2c->Instance->CR1 &= ~I2C_CR1_TXDMAEN;

    /* Check if Errors has been detected during transfer */
    if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
    {
      /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
      /* Wait until STOPF flag is reset */
      if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, I2C_TIMEOUT_STOPF, tickstart) != HAL_OK)
      {
        if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
        {
          hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
        }
        else
        {
          hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
        }
      }

      /* Clear STOP Flag */
      __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

      /* Clear Configuration Register 2 */
      I2C_RESET_CR2(hi2c);

      hi2c->XferCount = 0;

      hi2c->State = HAL_I2C_STATE_READY;
      hi2c->Mode = HAL_I2C_MODE_NONE;
      HAL_I2C_ErrorCallback(hi2c);
    }
    else
    {
      hi2c->pBuffPtr += hi2c->XferSize;
      hi2c->XferCount -= hi2c->XferSize;
      if(hi2c->XferCount > 255)
      {
        hi2c->XferSize = 255;
      }
      else
      {
        hi2c->XferSize = hi2c->XferCount;
      }

      DevAddress = (hi2c->Instance->CR2 & I2C_CR2_SADD);

      /* Enable the DMA channel */
      HAL_DMA_Start_IT(hi2c->hdmatx, (uint32_t)hi2c->pBuffPtr, (uint32_t)&hi2c->Instance->TXDR, hi2c->XferSize);

      /* Send Slave Address */
      /* Set NBYTES to write and reload if size > 255 */
      if( (hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount) )
      {
        I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_RELOAD_MODE, I2C_NO_STARTSTOP);
      }
      else
      {
        I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_AUTOEND_MODE, I2C_NO_STARTSTOP);
      }

      /* Wait until TXIS flag is set */
      if(I2C_WaitOnTXISFlagUntilTimeout(hi2c, I2C_TIMEOUT_TXIS, tickstart) != HAL_OK)
      {
        /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
        /* Wait until STOPF flag is reset */
        if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, I2C_TIMEOUT_STOPF, tickstart) != HAL_OK)
        {
          if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
          {
            hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
          }
          else
          {
            hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
          }
        }

        /* Clear STOP Flag */
        __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

        /* Clear Configuration Register 2 */
        I2C_RESET_CR2(hi2c);

        hi2c->XferCount = 0;

        hi2c->State = HAL_I2C_STATE_READY;
        hi2c->Mode = HAL_I2C_MODE_NONE;

        HAL_I2C_ErrorCallback(hi2c);
      }
      else
      {
        /* Enable DMA Request */
        hi2c->Instance->CR1 |= I2C_CR1_TXDMAEN;
      }
    }
  }
  else
  {
    /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
    /* Wait until STOPF flag is reset */
    if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, I2C_TIMEOUT_STOPF, tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
      }
      else
      {
        hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
      }
    }

    /* Clear STOP Flag */
    __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

    /* Clear Configuration Register 2 */
    I2C_RESET_CR2(hi2c);

    /* Disable DMA Request */
    hi2c->Instance->CR1 &= ~I2C_CR1_TXDMAEN;

    hi2c->XferCount = 0;

    hi2c->State = HAL_I2C_STATE_READY;
    hi2c->Mode = HAL_I2C_MODE_NONE;

    /* Check if Errors has been detected during transfer */
    if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
    {
      HAL_I2C_ErrorCallback(hi2c);
    }
    else
    {
      HAL_I2C_MemTxCpltCallback(hi2c);
    }
  }
}

/**
  * @brief  DMA I2C Memory Read process complete callback.
  * @param  hdma DMA handle
  * @retval None
  */
static void I2C_DMAMemReceiveCplt(DMA_HandleTypeDef *hdma)
{
  uint32_t tickstart = 0;
  I2C_HandleTypeDef* hi2c = ( I2C_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
  uint16_t DevAddress;

  /* Init tickstart for timeout managment*/
  tickstart = HAL_GetTick();

  /* Check if last DMA request was done with RELOAD */
  /* Set NBYTES to write and reload if size > 255 */
  if( (hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount) )
  {
    /* Wait until TCR flag is set */
    if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_TCR, RESET, I2C_TIMEOUT_TCR, tickstart) != HAL_OK)
    {
      hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
    }

    /* Disable DMA Request */
    hi2c->Instance->CR1 &= ~I2C_CR1_RXDMAEN;

    /* Check if Errors has been detected during transfer */
    if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
    {
      /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
      /* Wait until STOPF flag is reset */
      if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, I2C_TIMEOUT_STOPF, tickstart) != HAL_OK)
      {
        if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
        {
          hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
        }
        else
        {
          hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
        }
      }

      /* Clear STOP Flag */
      __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

      /* Clear Configuration Register 2 */
      I2C_RESET_CR2(hi2c);

      hi2c->XferCount = 0;

      hi2c->State = HAL_I2C_STATE_READY;
      hi2c->Mode = HAL_I2C_MODE_NONE;

      HAL_I2C_ErrorCallback(hi2c);
    }
    else
    {
      hi2c->pBuffPtr += hi2c->XferSize;
      hi2c->XferCount -= hi2c->XferSize;
      if(hi2c->XferCount > 255)
      {
        hi2c->XferSize = 255;
      }
      else
      {
        hi2c->XferSize = hi2c->XferCount;
      }

      DevAddress = (hi2c->Instance->CR2 & I2C_CR2_SADD);

      /* Enable the DMA channel */
      HAL_DMA_Start_IT(hi2c->hdmarx, (uint32_t)&hi2c->Instance->RXDR, (uint32_t)hi2c->pBuffPtr, hi2c->XferSize);

      /* Send Slave Address */
      /* Set NBYTES to write and reload if size > 255 */
      if( (hi2c->XferSize == 255) && (hi2c->XferSize < hi2c->XferCount) )
      {
        I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_RELOAD_MODE, I2C_NO_STARTSTOP);
      }
      else
      {
        I2C_TransferConfig(hi2c,DevAddress,hi2c->XferSize, I2C_AUTOEND_MODE, I2C_NO_STARTSTOP);
      }

      /* Wait until RXNE flag is set */
      if(I2C_WaitOnFlagUntilTimeout(hi2c, I2C_FLAG_RXNE, RESET, I2C_TIMEOUT_RXNE, tickstart) != HAL_OK)
      {
        hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
      }

      /* Check if Errors has been detected during transfer */
      if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
      {
        /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
        /* Wait until STOPF flag is reset */
        if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, I2C_TIMEOUT_STOPF, tickstart) != HAL_OK)
        {
          if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
          {
            hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
          }
          else
          {
            hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
          }
        }

        /* Clear STOP Flag */
        __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

        /* Clear Configuration Register 2 */
        I2C_RESET_CR2(hi2c);

        hi2c->XferCount = 0;

        hi2c->State = HAL_I2C_STATE_READY;
        hi2c->Mode = HAL_I2C_MODE_NONE;

        HAL_I2C_ErrorCallback(hi2c);
      }
      else
      {
        /* Enable DMA Request */
        hi2c->Instance->CR1 |= I2C_CR1_RXDMAEN;
      }
    }
  }
  else
  {
    /* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
    /* Wait until STOPF flag is reset */
    if(I2C_WaitOnSTOPFlagUntilTimeout(hi2c, I2C_TIMEOUT_STOPF, tickstart) != HAL_OK)
    {
      if(hi2c->ErrorCode == HAL_I2C_ERROR_AF)
      {
        hi2c->ErrorCode |= HAL_I2C_ERROR_AF;
      }
      else
      {
        hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
      }
    }

    /* Clear STOP Flag */
    __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

    /* Clear Configuration Register 2 */
    I2C_RESET_CR2(hi2c);

    /* Disable DMA Request */
    hi2c->Instance->CR1 &= ~I2C_CR1_RXDMAEN;

    hi2c->XferCount = 0;

    hi2c->State = HAL_I2C_STATE_READY;
    hi2c->Mode = HAL_I2C_MODE_NONE;

    /* Check if Errors has been detected during transfer */
    if(hi2c->ErrorCode != HAL_I2C_ERROR_NONE)
    {
      HAL_I2C_ErrorCallback(hi2c);
    }
    else
    {
      HAL_I2C_MemRxCpltCallback(hi2c);
    }
  }
}

/**
  * @brief  DMA I2C communication error callback.
  * @param hdma DMA handle
  * @retval None
  */
static void I2C_DMAError(DMA_HandleTypeDef *hdma)
{
  I2C_HandleTypeDef* hi2c = ( I2C_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;

  /* Disable Acknowledge */
  hi2c->Instance->CR2 |= I2C_CR2_NACK;

  hi2c->XferCount = 0;

  hi2c->State = HAL_I2C_STATE_READY;
  hi2c->Mode = HAL_I2C_MODE_NONE;

  hi2c->ErrorCode |= HAL_I2C_ERROR_DMA;

  HAL_I2C_ErrorCallback(hi2c);
}

/**
  * @brief  This function handles I2C Communication Timeout.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  Flag Specifies the I2C flag to check.
  * @param  Status The new Flag status (SET or RESET).
  * @param  Timeout Timeout duration
  * @param  Tickstart Tick start value
  * @retval HAL status
  */
static HAL_StatusTypeDef I2C_WaitOnFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Flag, FlagStatus Status, uint32_t Timeout, uint32_t Tickstart)
{
  /* Wait until flag is set */
  if(Status == RESET)
  {
    while(__HAL_I2C_GET_FLAG(hi2c, Flag) == RESET)
    {
      /* Check for the Timeout */
      if(Timeout != HAL_MAX_DELAY)
      {
        if((Timeout == 0)||((HAL_GetTick() - Tickstart ) > Timeout))
        {
          hi2c->State= HAL_I2C_STATE_READY;
          hi2c->Mode = HAL_I2C_MODE_NONE;

          /* Process Unlocked */
          __HAL_UNLOCK(hi2c);
          return HAL_TIMEOUT;
        }
      }
    }
  }
  else
  {
    while(__HAL_I2C_GET_FLAG(hi2c, Flag) != RESET)
    {
      /* Check for the Timeout */
      if(Timeout != HAL_MAX_DELAY)
      {
        if((Timeout == 0)||((HAL_GetTick() - Tickstart ) > Timeout))
        {
          hi2c->State= HAL_I2C_STATE_READY;
          hi2c->Mode = HAL_I2C_MODE_NONE;

          /* Process Unlocked */
          __HAL_UNLOCK(hi2c);
          return HAL_TIMEOUT;
        }
      }
    }
  }
  return HAL_OK;
}

/**
  * @brief  This function handles I2C Communication Timeout for specific usage of TXIS flag.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  Timeout Timeout duration
  * @param  Tickstart Tick start value
  * @retval HAL status
  */
static HAL_StatusTypeDef I2C_WaitOnTXISFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart)
{
  while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_TXIS) == RESET)
  {
    /* Check if a NACK is detected */
    if(I2C_IsAcknowledgeFailed(hi2c, Timeout, Tickstart) != HAL_OK)
    {
      return HAL_ERROR;
    }

    /* Check for the Timeout */
    if(Timeout != HAL_MAX_DELAY)
    {
      if((Timeout == 0)||((HAL_GetTick() - Tickstart) > Timeout))
      {
        hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
        hi2c->State= HAL_I2C_STATE_READY;
        hi2c->Mode = HAL_I2C_MODE_NONE;

        /* Process Unlocked */
        __HAL_UNLOCK(hi2c);

        return HAL_TIMEOUT;
      }
    }
  }
  return HAL_OK;
}

/**
  * @brief  This function handles I2C Communication Timeout for specific usage of STOP flag.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  Timeout Timeout duration
  * @param  Tickstart Tick start value
  * @retval HAL status
  */
static HAL_StatusTypeDef I2C_WaitOnSTOPFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart)
{
  while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_STOPF) == RESET)
  {
    /* Check if a NACK is detected */
    if(I2C_IsAcknowledgeFailed(hi2c, Timeout, Tickstart) != HAL_OK)
    {
      return HAL_ERROR;
    }

    /* Check for the Timeout */
    if((Timeout == 0)||((HAL_GetTick() - Tickstart) > Timeout))
    {
      hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
      hi2c->State= HAL_I2C_STATE_READY;
      hi2c->Mode = HAL_I2C_MODE_NONE;

      /* Process Unlocked */
      __HAL_UNLOCK(hi2c);

      return HAL_TIMEOUT;
    }
  }
  return HAL_OK;
}

/**
  * @brief  This function handles I2C Communication Timeout for specific usage of RXNE flag.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  Timeout Timeout duration
  * @param  Tickstart Tick start value
  * @retval HAL status
  */
static HAL_StatusTypeDef I2C_WaitOnRXNEFlagUntilTimeout(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart)
{
  while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_RXNE) == RESET)
  {
    /* Check if a NACK is detected */
    if(I2C_IsAcknowledgeFailed(hi2c, Timeout, Tickstart) != HAL_OK)
    {
      return HAL_ERROR;
    }

    /* Check if a STOPF is detected */
    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_STOPF) == SET)
    {
      /* Clear STOP Flag */
      __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

      /* Clear Configuration Register 2 */
      I2C_RESET_CR2(hi2c);

      hi2c->ErrorCode = HAL_I2C_ERROR_NONE;
      hi2c->State= HAL_I2C_STATE_READY;
      hi2c->Mode = HAL_I2C_MODE_NONE;

      /* Process Unlocked */
      __HAL_UNLOCK(hi2c);

      return HAL_ERROR;
    }

    /* Check for the Timeout */
    if((Timeout == 0)||((HAL_GetTick() - Tickstart) > Timeout))
    {
      hi2c->ErrorCode |= HAL_I2C_ERROR_TIMEOUT;
      hi2c->State= HAL_I2C_STATE_READY;

      /* Process Unlocked */
      __HAL_UNLOCK(hi2c);

      return HAL_TIMEOUT;
    }
  }
  return HAL_OK;
}

/**
  * @brief  This function handles Acknowledge failed detection during an I2C Communication.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  Timeout Timeout duration
  * @param  Tickstart Tick start value
  * @retval HAL status
  */
static HAL_StatusTypeDef I2C_IsAcknowledgeFailed(I2C_HandleTypeDef *hi2c, uint32_t Timeout, uint32_t Tickstart)
{
  if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_AF) == SET)
  {
    /* Wait until STOP Flag is reset */
    /* AutoEnd should be initiate after AF */
    while(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_STOPF) == RESET)
    {
      /* Check for the Timeout */
      if(Timeout != HAL_MAX_DELAY)
      {
      if((Timeout == 0)||((HAL_GetTick() - Tickstart) > Timeout))
        {
          hi2c->State= HAL_I2C_STATE_READY;
          hi2c->Mode = HAL_I2C_MODE_NONE;

          /* Process Unlocked */
          __HAL_UNLOCK(hi2c);
          return HAL_TIMEOUT;
        }
      }
    }

    /* Clear NACKF Flag */
    __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_AF);

    /* Clear STOP Flag */
    __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_STOPF);

    /* Flush TX register if not empty */
    if(__HAL_I2C_GET_FLAG(hi2c, I2C_FLAG_TXE) == RESET)
    {
      __HAL_I2C_CLEAR_FLAG(hi2c, I2C_FLAG_TXE);
    }

    /* Clear Configuration Register 2 */
    I2C_RESET_CR2(hi2c);

    hi2c->ErrorCode = HAL_I2C_ERROR_AF;
    hi2c->State= HAL_I2C_STATE_READY;
    hi2c->Mode = HAL_I2C_MODE_NONE;

    /* Process Unlocked */
    __HAL_UNLOCK(hi2c);

    return HAL_ERROR;
  }
  return HAL_OK;
}

/**
  * @brief  Handles I2Cx communication when starting transfer or during transfer (TC or TCR flag are set).
  * @param  hi2c I2C handle.
  * @param  DevAddress Specifies the slave address to be programmed.
  * @param  Size Specifies the number of bytes to be programmed.
  *   This parameter must be a value between 0 and 255.
  * @param  Mode New state of the I2C START condition generation.
  *   This parameter can be one of the following values:
  *     @arg @ref I2C_RELOAD_MODE Enable Reload mode .
  *     @arg @ref I2C_AUTOEND_MODE Enable Automatic end mode.
  *     @arg @ref I2C_SOFTEND_MODE Enable Software end mode.
  * @param  Request New state of the I2C START condition generation.
  *   This parameter can be one of the following values:
  *     @arg @ref I2C_NO_STARTSTOP Don't Generate stop and start condition.
  *     @arg @ref I2C_GENERATE_STOP Generate stop condition (Size should be set to 0).
  *     @arg @ref I2C_GENERATE_START_READ Generate Restart for read request.
  *     @arg @ref I2C_GENERATE_START_WRITE Generate Restart for write request.
  * @retval None
  */
static void I2C_TransferConfig(I2C_HandleTypeDef *hi2c,  uint16_t DevAddress, uint8_t Size, uint32_t Mode, uint32_t Request)
{
  uint32_t tmpreg = 0;

  /* Check the parameters */
  assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance));
  assert_param(IS_TRANSFER_MODE(Mode));
  assert_param(IS_TRANSFER_REQUEST(Request));

  /* Get the CR2 register value */
  tmpreg = hi2c->Instance->CR2;

  /* clear tmpreg specific bits */
  tmpreg &= (uint32_t)~((uint32_t)(I2C_CR2_SADD | I2C_CR2_NBYTES | I2C_CR2_RELOAD | I2C_CR2_AUTOEND | I2C_CR2_RD_WRN | I2C_CR2_START | I2C_CR2_STOP));

  /* update tmpreg */
  tmpreg |= (uint32_t)(((uint32_t)DevAddress & I2C_CR2_SADD) | (((uint32_t)Size << 16 ) & I2C_CR2_NBYTES) | \
            (uint32_t)Mode | (uint32_t)Request);

  /* update CR2 register */
  hi2c->Instance->CR2 = tmpreg;
}

/**
  * @brief  Manage the enabling of Interrupts.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  InterruptRequest Value of @ref I2C_Interrupt_configuration_definition.
  * @retval HAL status
  */
static HAL_StatusTypeDef I2C_Enable_IRQ(I2C_HandleTypeDef *hi2c, uint16_t InterruptRequest)
{
  uint32_t tmpisr = 0;

  if((InterruptRequest & I2C_XFER_LISTEN_IT) == I2C_XFER_LISTEN_IT)
  {
    /* Enable ADDR and STOP interrupt */
    tmpisr |= I2C_IT_ADDRI | I2C_IT_STOPI | I2C_IT_NACKI | I2C_IT_ERRI;
  }

  if((InterruptRequest & I2C_XFER_TX_IT) == I2C_XFER_TX_IT)
  {
    /* Enable ERR, TC, STOP, NACK and RXI interrupt */
    tmpisr |= I2C_IT_ERRI | I2C_IT_TCI | I2C_IT_STOPI | I2C_IT_NACKI | I2C_IT_TXI;
  }

  if((InterruptRequest & I2C_XFER_RX_IT) == I2C_XFER_RX_IT)
  {
    /* Enable ERR, TC, STOP, NACK and TXI interrupt */
    tmpisr |= I2C_IT_ERRI | I2C_IT_TCI | I2C_IT_STOPI | I2C_IT_NACKI | I2C_IT_RXI;
  }

  /* Enable interrupts only at the end */
  /* to avoid the risk of I2C interrupt handle execution before */
  /* all interrupts requested done */
  __HAL_I2C_ENABLE_IT(hi2c, tmpisr);

  return HAL_OK;
}

/**
  * @brief  Manage the disabling of Interrupts.
  * @param  hi2c Pointer to a I2C_HandleTypeDef structure that contains
  *                the configuration information for the specified I2C.
  * @param  InterruptRequest Value of @ref I2C_Interrupt_configuration_definition.
  * @retval HAL status
  */
static HAL_StatusTypeDef I2C_Disable_IRQ(I2C_HandleTypeDef *hi2c, uint16_t InterruptRequest)
{
  uint32_t tmpisr = 0;

  if((InterruptRequest & I2C_XFER_TX_IT) == I2C_XFER_TX_IT)
  {
    /* Disable TC and TXI interrupts */
    tmpisr |= I2C_IT_TCI | I2C_IT_TXI;

    if((hi2c->State & HAL_I2C_STATE_LISTEN) != HAL_I2C_STATE_LISTEN)
    {
      /* Disable NACK and STOP interrupts */
      tmpisr |= I2C_IT_STOPI | I2C_IT_NACKI | I2C_IT_ERRI;
    }
  }

  if((InterruptRequest & I2C_XFER_RX_IT) == I2C_XFER_RX_IT)
  {
    /* Disable TC and RXI interrupts */
    tmpisr |= I2C_IT_TCI | I2C_IT_RXI;

    if((hi2c->State & HAL_I2C_STATE_LISTEN) != HAL_I2C_STATE_LISTEN)
    {
      /* Disable NACK and STOP interrupts */
      tmpisr |= I2C_IT_STOPI | I2C_IT_NACKI | I2C_IT_ERRI;
    }
  }

  if((InterruptRequest & I2C_XFER_LISTEN_IT) == I2C_XFER_LISTEN_IT)
  {
    /* Disable ADDR, NACK and STOP interrupts */
    tmpisr |= I2C_IT_ADDRI | I2C_IT_STOPI | I2C_IT_NACKI | I2C_IT_ERRI;
  }

  /* Disable interrupts only at the end */
  /* to avoid a breaking situation like at "t" time */
  /* all disable interrupts request are not done */
  __HAL_I2C_DISABLE_IT(hi2c, tmpisr);

  return HAL_OK;
}

/**
  * @}
  */

#endif /* HAL_I2C_MODULE_ENABLED */
/**
  * @}
  */

/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/