stm32f7xx_hal_i2s.c

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/* Includes ------------------------------------------------------------------*/
#include "stm32f7xx_hal.h"
 
#ifdef HAL_I2S_MODULE_ENABLED
 
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
static void               I2S_DMATxCplt(DMA_HandleTypeDef *hdma);
static void               I2S_DMATxHalfCplt(DMA_HandleTypeDef *hdma);
static void               I2S_DMARxCplt(DMA_HandleTypeDef *hdma);
static void               I2S_DMARxHalfCplt(DMA_HandleTypeDef *hdma);
static void               I2S_DMAError(DMA_HandleTypeDef *hdma);
static void               I2S_Transmit_IT(I2S_HandleTypeDef *hi2s);
static void               I2S_Receive_IT(I2S_HandleTypeDef *hi2s);
static uint32_t I2S_GetClockFreq(I2S_HandleTypeDef *hi2s);
static HAL_StatusTypeDef  I2S_WaitFlagStateUntilTimeout(I2S_HandleTypeDef *hi2s, uint32_t Flag, FlagStatus State,
                                                        uint32_t Timeout);
/* Exported functions ---------------------------------------------------------*/
 
HAL_StatusTypeDef HAL_I2S_Init(I2S_HandleTypeDef *hi2s)
{
  uint32_t i2sdiv;
  uint32_t i2sodd;
  uint32_t packetlength;
  uint32_t tmp;
  uint32_t i2sclk;
 
  /* Check the I2S handle allocation */
  if (hi2s == NULL)
  {
    return HAL_ERROR;
  }
 
  /* Check the I2S parameters */
  assert_param(IS_I2S_ALL_INSTANCE(hi2s->Instance));
  assert_param(IS_I2S_MODE(hi2s->Init.Mode));
  assert_param(IS_I2S_STANDARD(hi2s->Init.Standard));
  assert_param(IS_I2S_DATA_FORMAT(hi2s->Init.DataFormat));
  assert_param(IS_I2S_MCLK_OUTPUT(hi2s->Init.MCLKOutput));
  assert_param(IS_I2S_AUDIO_FREQ(hi2s->Init.AudioFreq));
  assert_param(IS_I2S_CPOL(hi2s->Init.CPOL));
  assert_param(IS_I2S_CLOCKSOURCE(hi2s->Init.ClockSource));
 
  if (hi2s->State == HAL_I2S_STATE_RESET)
  {
    /* Allocate lock resource and initialize it */
    hi2s->Lock = HAL_UNLOCKED;
 
#if (USE_HAL_I2S_REGISTER_CALLBACKS == 1U)
    /* Init the I2S Callback settings */
    hi2s->TxCpltCallback       = HAL_I2S_TxCpltCallback;          /* Legacy weak TxCpltCallback       */
    hi2s->RxCpltCallback       = HAL_I2S_RxCpltCallback;          /* Legacy weak RxCpltCallback       */
    hi2s->TxHalfCpltCallback   = HAL_I2S_TxHalfCpltCallback;      /* Legacy weak TxHalfCpltCallback   */
    hi2s->RxHalfCpltCallback   = HAL_I2S_RxHalfCpltCallback;      /* Legacy weak RxHalfCpltCallback   */
    hi2s->ErrorCallback        = HAL_I2S_ErrorCallback;           /* Legacy weak ErrorCallback        */
 
    if (hi2s->MspInitCallback == NULL)
    {
      hi2s->MspInitCallback = HAL_I2S_MspInit; /* Legacy weak MspInit  */
    }
 
    /* Init the low level hardware : GPIO, CLOCK, NVIC... */
    hi2s->MspInitCallback(hi2s);
#else
    /* Init the low level hardware : GPIO, CLOCK, CORTEX...etc */
    HAL_I2S_MspInit(hi2s);
#endif /* USE_HAL_I2S_REGISTER_CALLBACKS */
  }
 
  hi2s->State = HAL_I2S_STATE_BUSY;
 
  /*----------------------- SPIx I2SCFGR & I2SPR Configuration ----------------*/
  /* Clear I2SMOD, I2SE, I2SCFG, PCMSYNC, I2SSTD, CKPOL, DATLEN and CHLEN bits */
  CLEAR_BIT(hi2s->Instance->I2SCFGR, (SPI_I2SCFGR_CHLEN | SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CKPOL | \
                                      SPI_I2SCFGR_I2SSTD | SPI_I2SCFGR_PCMSYNC | SPI_I2SCFGR_I2SCFG | \
                                      SPI_I2SCFGR_I2SE | SPI_I2SCFGR_I2SMOD));
  hi2s->Instance->I2SPR = 0x0002U;
 
  /*----------------------- I2SPR: I2SDIV and ODD Calculation -----------------*/
  /* If the requested audio frequency is not the default, compute the prescaler */
  if (hi2s->Init.AudioFreq != I2S_AUDIOFREQ_DEFAULT)
  {
    /* Check the frame length (For the Prescaler computing) ********************/
    if (hi2s->Init.DataFormat == I2S_DATAFORMAT_16B)
    {
      /* Packet length is 16 bits */
      packetlength = 16U;
    }
    else
    {
      /* Packet length is 32 bits */
      packetlength = 32U;
    }
 
    /* I2S standard */
    if (hi2s->Init.Standard <= I2S_STANDARD_LSB)
    {
      /* In I2S standard packet lenght is multiplied by 2 */
      packetlength = packetlength * 2U;
    }
 
    /* If an external I2S clock has to be used, the specific define should be set
    in the project configuration or in the stm32f3xx_conf.h file */
    if (hi2s->Init.ClockSource == I2S_CLOCK_EXTERNAL)
    {
      /* Set the I2S clock to the external clock  value */
      i2sclk = EXTERNAL_CLOCK_VALUE;
    }
    else
    {
      /* Get the I2S source clock value */
      i2sclk = I2S_GetClockFreq(hi2s);
    }
 
    /* Compute the Real divider depending on the MCLK output state, with a floating point */
    if (hi2s->Init.MCLKOutput == I2S_MCLKOUTPUT_ENABLE)
    {
      /* MCLK output is enabled */
      if (hi2s->Init.DataFormat != I2S_DATAFORMAT_16B)
      {
        tmp = (uint32_t)(((((i2sclk / (packetlength * 4U)) * 10U) / hi2s->Init.AudioFreq)) + 5U);
      }
      else
      {
        tmp = (uint32_t)(((((i2sclk / (packetlength * 8U)) * 10U) / hi2s->Init.AudioFreq)) + 5U);
      }
    }
    else
    {
      /* MCLK output is disabled */
      tmp = (uint32_t)(((((i2sclk / packetlength) * 10U) / hi2s->Init.AudioFreq)) + 5U);
    }
 
    /* Remove the flatting point */
    tmp = tmp / 10U;
 
    /* Check the parity of the divider */
    i2sodd = (uint32_t)(tmp & (uint32_t)1U);
 
    /* Compute the i2sdiv prescaler */
    i2sdiv = (uint32_t)((tmp - i2sodd) / 2U);
 
    /* Get the Mask for the Odd bit (SPI_I2SPR[8]) register */
    i2sodd = (uint32_t)(i2sodd << 8U);
  }
  else
  {
    /* Set the default values */
    i2sdiv = 2U;
    i2sodd = 0U;
  }
 
  /* Test if the divider is 1 or 0 or greater than 0xFF */
  if ((i2sdiv < 2U) || (i2sdiv > 0xFFU))
  {
    /* Set the error code and execute error callback*/
    SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_PRESCALER);
    return  HAL_ERROR;
  }
 
  /*----------------------- SPIx I2SCFGR & I2SPR Configuration ----------------*/
 
  /* Write to SPIx I2SPR register the computed value */
  hi2s->Instance->I2SPR = (uint32_t)((uint32_t)i2sdiv | (uint32_t)(i2sodd | (uint32_t)hi2s->Init.MCLKOutput));
 
  /* Clear I2SMOD, I2SE, I2SCFG, PCMSYNC, I2SSTD, CKPOL, DATLEN and CHLEN bits */
  /* And configure the I2S with the I2S_InitStruct values                      */
  MODIFY_REG(hi2s->Instance->I2SCFGR, (SPI_I2SCFGR_CHLEN | SPI_I2SCFGR_DATLEN | \
                                       SPI_I2SCFGR_CKPOL | SPI_I2SCFGR_I2SSTD | \
                                       SPI_I2SCFGR_PCMSYNC | SPI_I2SCFGR_I2SCFG | \
                                       SPI_I2SCFGR_I2SE  | SPI_I2SCFGR_I2SMOD), \
             (SPI_I2SCFGR_I2SMOD | hi2s->Init.Mode | \
              hi2s->Init.Standard | hi2s->Init.DataFormat | \
              hi2s->Init.CPOL));
 
#if defined(SPI_I2SCFGR_ASTRTEN)
  if ((hi2s->Init.Standard == I2S_STANDARD_PCM_SHORT) || ((hi2s->Init.Standard == I2S_STANDARD_PCM_LONG)))
  {
    /* Write to SPIx I2SCFGR */
    SET_BIT(hi2s->Instance->I2SCFGR, SPI_I2SCFGR_ASTRTEN);
  }
#endif
 
  hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
  hi2s->State     = HAL_I2S_STATE_READY;
 
  return HAL_OK;
}
 
HAL_StatusTypeDef HAL_I2S_DeInit(I2S_HandleTypeDef *hi2s)
{
  /* Check the I2S handle allocation */
  if (hi2s == NULL)
  {
    return HAL_ERROR;
  }
 
  /* Check the parameters */
  assert_param(IS_I2S_ALL_INSTANCE(hi2s->Instance));
 
  hi2s->State = HAL_I2S_STATE_BUSY;
 
  /* Disable the I2S Peripheral Clock */
  __HAL_I2S_DISABLE(hi2s);
 
#if (USE_HAL_I2S_REGISTER_CALLBACKS == 1U)
  if (hi2s->MspDeInitCallback == NULL)
  {
    hi2s->MspDeInitCallback = HAL_I2S_MspDeInit; /* Legacy weak MspDeInit  */
  }
 
  /* DeInit the low level hardware: GPIO, CLOCK, NVIC... */
  hi2s->MspDeInitCallback(hi2s);
#else
  /* DeInit the low level hardware: GPIO, CLOCK, NVIC... */
  HAL_I2S_MspDeInit(hi2s);
#endif /* USE_HAL_I2S_REGISTER_CALLBACKS */
 
  hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
  hi2s->State     = HAL_I2S_STATE_RESET;
 
  /* Release Lock */
  __HAL_UNLOCK(hi2s);
 
  return HAL_OK;
}
 
__weak void HAL_I2S_MspInit(I2S_HandleTypeDef *hi2s)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2s);
 
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_I2S_MspInit could be implemented in the user file
   */
}
 
__weak void HAL_I2S_MspDeInit(I2S_HandleTypeDef *hi2s)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2s);
 
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_I2S_MspDeInit could be implemented in the user file
   */
}
 
#if (USE_HAL_I2S_REGISTER_CALLBACKS == 1U)
 
HAL_StatusTypeDef HAL_I2S_RegisterCallback(I2S_HandleTypeDef *hi2s, HAL_I2S_CallbackIDTypeDef CallbackID, pI2S_CallbackTypeDef pCallback)
{
  HAL_StatusTypeDef status = HAL_OK;
 
  if (pCallback == NULL)
  {
    /* Update the error code */
    hi2s->ErrorCode |= HAL_I2S_ERROR_INVALID_CALLBACK;
 
    return HAL_ERROR;
  }
  /* Process locked */
  __HAL_LOCK(hi2s);
 
  if (HAL_I2S_STATE_READY == hi2s->State)
  {
    switch (CallbackID)
    {
      case HAL_I2S_TX_COMPLETE_CB_ID :
        hi2s->TxCpltCallback = pCallback;
        break;
 
      case HAL_I2S_RX_COMPLETE_CB_ID :
        hi2s->RxCpltCallback = pCallback;
        break;
 
      case HAL_I2S_TX_HALF_COMPLETE_CB_ID :
        hi2s->TxHalfCpltCallback = pCallback;
        break;
 
      case HAL_I2S_RX_HALF_COMPLETE_CB_ID :
        hi2s->RxHalfCpltCallback = pCallback;
        break;
 
      case HAL_I2S_ERROR_CB_ID :
        hi2s->ErrorCallback = pCallback;
        break;
 
      case HAL_I2S_MSPINIT_CB_ID :
        hi2s->MspInitCallback = pCallback;
        break;
 
      case HAL_I2S_MSPDEINIT_CB_ID :
        hi2s->MspDeInitCallback = pCallback;
        break;
 
      default :
        /* Update the error code */
        SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_INVALID_CALLBACK);
 
        /* Return error status */
        status =  HAL_ERROR;
        break;
    }
  }
  else if (HAL_I2S_STATE_RESET == hi2s->State)
  {
    switch (CallbackID)
    {
      case HAL_I2S_MSPINIT_CB_ID :
        hi2s->MspInitCallback = pCallback;
        break;
 
      case HAL_I2S_MSPDEINIT_CB_ID :
        hi2s->MspDeInitCallback = pCallback;
        break;
 
      default :
        /* Update the error code */
        SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_INVALID_CALLBACK);
 
        /* Return error status */
        status =  HAL_ERROR;
        break;
    }
  }
  else
  {
    /* Update the error code */
    SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_INVALID_CALLBACK);
 
    /* Return error status */
    status =  HAL_ERROR;
  }
 
  /* Release Lock */
  __HAL_UNLOCK(hi2s);
  return status;
}
 
HAL_StatusTypeDef HAL_I2S_UnRegisterCallback(I2S_HandleTypeDef *hi2s, HAL_I2S_CallbackIDTypeDef CallbackID)
{
  HAL_StatusTypeDef status = HAL_OK;
 
  /* Process locked */
  __HAL_LOCK(hi2s);
 
  if (HAL_I2S_STATE_READY == hi2s->State)
  {
    switch (CallbackID)
    {
      case HAL_I2S_TX_COMPLETE_CB_ID :
        hi2s->TxCpltCallback = HAL_I2S_TxCpltCallback;                /* Legacy weak TxCpltCallback       */
        break;
 
      case HAL_I2S_RX_COMPLETE_CB_ID :
        hi2s->RxCpltCallback = HAL_I2S_RxCpltCallback;                /* Legacy weak RxCpltCallback       */
        break;
 
      case HAL_I2S_TX_HALF_COMPLETE_CB_ID :
        hi2s->TxHalfCpltCallback = HAL_I2S_TxHalfCpltCallback;        /* Legacy weak TxHalfCpltCallback   */
        break;
 
      case HAL_I2S_RX_HALF_COMPLETE_CB_ID :
        hi2s->RxHalfCpltCallback = HAL_I2S_RxHalfCpltCallback;        /* Legacy weak RxHalfCpltCallback   */
        break;
 
      case HAL_I2S_ERROR_CB_ID :
        hi2s->ErrorCallback = HAL_I2S_ErrorCallback;                  /* Legacy weak ErrorCallback        */
        break;
 
      case HAL_I2S_MSPINIT_CB_ID :
        hi2s->MspInitCallback = HAL_I2S_MspInit;                      /* Legacy weak MspInit              */
        break;
 
      case HAL_I2S_MSPDEINIT_CB_ID :
        hi2s->MspDeInitCallback = HAL_I2S_MspDeInit;                  /* Legacy weak MspDeInit            */
        break;
 
      default :
        /* Update the error code */
        SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_INVALID_CALLBACK);
 
        /* Return error status */
        status =  HAL_ERROR;
        break;
    }
  }
  else if (HAL_I2S_STATE_RESET == hi2s->State)
  {
    switch (CallbackID)
    {
      case HAL_I2S_MSPINIT_CB_ID :
        hi2s->MspInitCallback = HAL_I2S_MspInit;                      /* Legacy weak MspInit              */
        break;
 
      case HAL_I2S_MSPDEINIT_CB_ID :
        hi2s->MspDeInitCallback = HAL_I2S_MspDeInit;                  /* Legacy weak MspDeInit            */
        break;
 
      default :
        /* Update the error code */
        SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_INVALID_CALLBACK);
 
        /* Return error status */
        status =  HAL_ERROR;
        break;
    }
  }
  else
  {
    /* Update the error code */
    SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_INVALID_CALLBACK);
 
    /* Return error status */
    status =  HAL_ERROR;
  }
 
  /* Release Lock */
  __HAL_UNLOCK(hi2s);
  return status;
}
#endif /* USE_HAL_I2S_REGISTER_CALLBACKS */
 
HAL_StatusTypeDef HAL_I2S_Transmit(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size, uint32_t Timeout)
{
  uint32_t tmpreg_cfgr;
 
  if ((pData == NULL) || (Size == 0U))
  {
    return  HAL_ERROR;
  }
 
  /* Process Locked */
  __HAL_LOCK(hi2s);
 
  if (hi2s->State != HAL_I2S_STATE_READY)
  {
    __HAL_UNLOCK(hi2s);
    return HAL_BUSY;
  }
 
  /* Set state and reset error code */
  hi2s->State = HAL_I2S_STATE_BUSY_TX;
  hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
  hi2s->pTxBuffPtr = pData;
 
  tmpreg_cfgr = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
 
  if ((tmpreg_cfgr == I2S_DATAFORMAT_24B) || (tmpreg_cfgr == I2S_DATAFORMAT_32B))
  {
    hi2s->TxXferSize = (Size << 1U);
    hi2s->TxXferCount = (Size << 1U);
  }
  else
  {
    hi2s->TxXferSize = Size;
    hi2s->TxXferCount = Size;
  }
 
  tmpreg_cfgr = hi2s->Instance->I2SCFGR;
 
  /* Check if the I2S is already enabled */
  if ((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
  {
    /* Enable I2S peripheral */
    __HAL_I2S_ENABLE(hi2s);
  }
 
  /* Wait until TXE flag is set */
  if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_TXE, SET, Timeout) != HAL_OK)
  {
    /* Set the error code */
    SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_TIMEOUT);
    hi2s->State = HAL_I2S_STATE_READY;
    __HAL_UNLOCK(hi2s);
    return HAL_ERROR;
  }
 
  while (hi2s->TxXferCount > 0U)
  {
    hi2s->Instance->DR = (*hi2s->pTxBuffPtr);
    hi2s->pTxBuffPtr++;
    hi2s->TxXferCount--;
 
    /* Wait until TXE flag is set */
    if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_TXE, SET, Timeout) != HAL_OK)
    {
      /* Set the error code */
      SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_TIMEOUT);
      hi2s->State = HAL_I2S_STATE_READY;
      __HAL_UNLOCK(hi2s);
      return HAL_ERROR;
    }
 
    /* Check if an underrun occurs */
    if (__HAL_I2S_GET_FLAG(hi2s, I2S_FLAG_UDR) == SET)
    {
      /* Clear underrun flag */
      __HAL_I2S_CLEAR_UDRFLAG(hi2s);
 
      /* Set the error code */
      SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_UDR);
    }
  }
 
  /* Check if Slave mode is selected */
  if (((tmpreg_cfgr & SPI_I2SCFGR_I2SCFG) == I2S_MODE_SLAVE_TX) || ((tmpreg_cfgr & SPI_I2SCFGR_I2SCFG) == I2S_MODE_SLAVE_RX))
  {
    /* Wait until Busy flag is reset */
    if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_BSY, RESET, Timeout) != HAL_OK)
    {
      /* Set the error code */
      SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_TIMEOUT);
      hi2s->State = HAL_I2S_STATE_READY;
      __HAL_UNLOCK(hi2s);
      return HAL_ERROR;
    }
  }
 
  hi2s->State = HAL_I2S_STATE_READY;
  __HAL_UNLOCK(hi2s);
  return HAL_OK;
}
 
HAL_StatusTypeDef HAL_I2S_Receive(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size, uint32_t Timeout)
{
  uint32_t tmpreg_cfgr;
 
  if ((pData == NULL) || (Size == 0U))
  {
    return  HAL_ERROR;
  }
 
  /* Process Locked */
  __HAL_LOCK(hi2s);
 
  if (hi2s->State != HAL_I2S_STATE_READY)
  {
    __HAL_UNLOCK(hi2s);
    return HAL_BUSY;
  }
 
  /* Set state and reset error code */
  hi2s->State = HAL_I2S_STATE_BUSY_RX;
  hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
  hi2s->pRxBuffPtr = pData;
 
  tmpreg_cfgr = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
 
  if ((tmpreg_cfgr == I2S_DATAFORMAT_24B) || (tmpreg_cfgr == I2S_DATAFORMAT_32B))
  {
    hi2s->RxXferSize = (Size << 1U);
    hi2s->RxXferCount = (Size << 1U);
  }
  else
  {
    hi2s->RxXferSize = Size;
    hi2s->RxXferCount = Size;
  }
 
  /* Check if the I2S is already enabled */
  if ((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
  {
    /* Enable I2S peripheral */
    __HAL_I2S_ENABLE(hi2s);
  }
 
  /* Check if Master Receiver mode is selected */
  if ((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG) == I2S_MODE_MASTER_RX)
  {
    /* Clear the Overrun Flag by a read operation on the SPI_DR register followed by a read
    access to the SPI_SR register. */
    __HAL_I2S_CLEAR_OVRFLAG(hi2s);
  }
 
  /* Receive data */
  while (hi2s->RxXferCount > 0U)
  {
    /* Wait until RXNE flag is set */
    if (I2S_WaitFlagStateUntilTimeout(hi2s, I2S_FLAG_RXNE, SET, Timeout) != HAL_OK)
    {
      /* Set the error code */
      SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_TIMEOUT);
      hi2s->State = HAL_I2S_STATE_READY;
      __HAL_UNLOCK(hi2s);
      return HAL_ERROR;
    }
 
    (*hi2s->pRxBuffPtr) = (uint16_t)hi2s->Instance->DR;
    hi2s->pRxBuffPtr++;
    hi2s->RxXferCount--;
 
    /* Check if an overrun occurs */
    if (__HAL_I2S_GET_FLAG(hi2s, I2S_FLAG_OVR) == SET)
    {
      /* Clear overrun flag */
      __HAL_I2S_CLEAR_OVRFLAG(hi2s);
 
      /* Set the error code */
      SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_OVR);
    }
  }
 
  hi2s->State = HAL_I2S_STATE_READY;
  __HAL_UNLOCK(hi2s);
  return HAL_OK;
}
 
HAL_StatusTypeDef HAL_I2S_Transmit_IT(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size)
{
  uint32_t tmpreg_cfgr;
 
  if ((pData == NULL) || (Size == 0U))
  {
    return  HAL_ERROR;
  }
 
  /* Process Locked */
  __HAL_LOCK(hi2s);
 
  if (hi2s->State != HAL_I2S_STATE_READY)
  {
    __HAL_UNLOCK(hi2s);
    return HAL_BUSY;
  }
 
  /* Set state and reset error code */
  hi2s->State = HAL_I2S_STATE_BUSY_TX;
  hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
  hi2s->pTxBuffPtr = pData;
 
  tmpreg_cfgr = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
 
  if ((tmpreg_cfgr == I2S_DATAFORMAT_24B) || (tmpreg_cfgr == I2S_DATAFORMAT_32B))
  {
    hi2s->TxXferSize = (Size << 1U);
    hi2s->TxXferCount = (Size << 1U);
  }
  else
  {
    hi2s->TxXferSize = Size;
    hi2s->TxXferCount = Size;
  }
 
  /* Enable TXE and ERR interrupt */
  __HAL_I2S_ENABLE_IT(hi2s, (I2S_IT_TXE | I2S_IT_ERR));
 
  /* Check if the I2S is already enabled */
  if ((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
  {
    /* Enable I2S peripheral */
    __HAL_I2S_ENABLE(hi2s);
  }
 
  __HAL_UNLOCK(hi2s);
  return HAL_OK;
}
 
HAL_StatusTypeDef HAL_I2S_Receive_IT(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size)
{
  uint32_t tmpreg_cfgr;
 
  if ((pData == NULL) || (Size == 0U))
  {
    return  HAL_ERROR;
  }
 
  /* Process Locked */
  __HAL_LOCK(hi2s);
 
  if (hi2s->State != HAL_I2S_STATE_READY)
  {
    __HAL_UNLOCK(hi2s);
    return HAL_BUSY;
  }
 
  /* Set state and reset error code */
  hi2s->State = HAL_I2S_STATE_BUSY_RX;
  hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
  hi2s->pRxBuffPtr = pData;
 
  tmpreg_cfgr = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
 
  if ((tmpreg_cfgr == I2S_DATAFORMAT_24B) || (tmpreg_cfgr == I2S_DATAFORMAT_32B))
  {
    hi2s->RxXferSize = (Size << 1U);
    hi2s->RxXferCount = (Size << 1U);
  }
  else
  {
    hi2s->RxXferSize = Size;
    hi2s->RxXferCount = Size;
  }
 
  /* Enable RXNE and ERR interrupt */
  __HAL_I2S_ENABLE_IT(hi2s, (I2S_IT_RXNE | I2S_IT_ERR));
 
  /* Check if the I2S is already enabled */
  if ((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SE) != SPI_I2SCFGR_I2SE)
  {
    /* Enable I2S peripheral */
    __HAL_I2S_ENABLE(hi2s);
  }
 
  __HAL_UNLOCK(hi2s);
  return HAL_OK;
}
 
HAL_StatusTypeDef HAL_I2S_Transmit_DMA(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size)
{
  uint32_t tmpreg_cfgr;
 
  if ((pData == NULL) || (Size == 0U))
  {
    return  HAL_ERROR;
  }
 
  /* Process Locked */
  __HAL_LOCK(hi2s);
 
  if (hi2s->State != HAL_I2S_STATE_READY)
  {
    __HAL_UNLOCK(hi2s);
    return HAL_BUSY;
  }
 
  /* Set state and reset error code */
  hi2s->State = HAL_I2S_STATE_BUSY_TX;
  hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
  hi2s->pTxBuffPtr = pData;
 
  tmpreg_cfgr = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
 
  if ((tmpreg_cfgr == I2S_DATAFORMAT_24B) || (tmpreg_cfgr == I2S_DATAFORMAT_32B))
  {
    hi2s->TxXferSize = (Size << 1U);
    hi2s->TxXferCount = (Size << 1U);
  }
  else
  {
    hi2s->TxXferSize = Size;
    hi2s->TxXferCount = Size;
  }
 
  /* Set the I2S Tx DMA Half transfer complete callback */
  hi2s->hdmatx->XferHalfCpltCallback = I2S_DMATxHalfCplt;
 
  /* Set the I2S Tx DMA transfer complete callback */
  hi2s->hdmatx->XferCpltCallback = I2S_DMATxCplt;
 
  /* Set the DMA error callback */
  hi2s->hdmatx->XferErrorCallback = I2S_DMAError;
 
  /* Enable the Tx DMA Stream/Channel */
  if (HAL_OK != HAL_DMA_Start_IT(hi2s->hdmatx, (uint32_t)hi2s->pTxBuffPtr, (uint32_t)&hi2s->Instance->DR, hi2s->TxXferSize))
  {
    /* Update SPI error code */
    SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_DMA);
    hi2s->State = HAL_I2S_STATE_READY;
 
    __HAL_UNLOCK(hi2s);
    return HAL_ERROR;
  }
 
  /* Check if the I2S is already enabled */
  if (HAL_IS_BIT_CLR(hi2s->Instance->I2SCFGR, SPI_I2SCFGR_I2SE))
  {
    /* Enable I2S peripheral */
    __HAL_I2S_ENABLE(hi2s);
  }
 
  /* Check if the I2S Tx request is already enabled */
  if (HAL_IS_BIT_CLR(hi2s->Instance->CR2, SPI_CR2_TXDMAEN))
  {
    /* Enable Tx DMA Request */
    SET_BIT(hi2s->Instance->CR2, SPI_CR2_TXDMAEN);
  }
 
  __HAL_UNLOCK(hi2s);
  return HAL_OK;
}
 
HAL_StatusTypeDef HAL_I2S_Receive_DMA(I2S_HandleTypeDef *hi2s, uint16_t *pData, uint16_t Size)
{
  uint32_t tmpreg_cfgr;
 
  if ((pData == NULL) || (Size == 0U))
  {
    return  HAL_ERROR;
  }
 
  /* Process Locked */
  __HAL_LOCK(hi2s);
 
  if (hi2s->State != HAL_I2S_STATE_READY)
  {
    __HAL_UNLOCK(hi2s);
    return HAL_BUSY;
  }
 
  /* Set state and reset error code */
  hi2s->State = HAL_I2S_STATE_BUSY_RX;
  hi2s->ErrorCode = HAL_I2S_ERROR_NONE;
  hi2s->pRxBuffPtr = pData;
 
  tmpreg_cfgr = hi2s->Instance->I2SCFGR & (SPI_I2SCFGR_DATLEN | SPI_I2SCFGR_CHLEN);
 
  if ((tmpreg_cfgr == I2S_DATAFORMAT_24B) || (tmpreg_cfgr == I2S_DATAFORMAT_32B))
  {
    hi2s->RxXferSize = (Size << 1U);
    hi2s->RxXferCount = (Size << 1U);
  }
  else
  {
    hi2s->RxXferSize = Size;
    hi2s->RxXferCount = Size;
  }
 
  /* Set the I2S Rx DMA Half transfer complete callback */
  hi2s->hdmarx->XferHalfCpltCallback = I2S_DMARxHalfCplt;
 
  /* Set the I2S Rx DMA transfer complete callback */
  hi2s->hdmarx->XferCpltCallback = I2S_DMARxCplt;
 
  /* Set the DMA error callback */
  hi2s->hdmarx->XferErrorCallback = I2S_DMAError;
 
  /* Check if Master Receiver mode is selected */
  if ((hi2s->Instance->I2SCFGR & SPI_I2SCFGR_I2SCFG) == I2S_MODE_MASTER_RX)
  {
    /* Clear the Overrun Flag by a read operation to the SPI_DR register followed by a read
    access to the SPI_SR register. */
    __HAL_I2S_CLEAR_OVRFLAG(hi2s);
  }
 
  /* Enable the Rx DMA Stream/Channel */
  if (HAL_OK != HAL_DMA_Start_IT(hi2s->hdmarx, (uint32_t)&hi2s->Instance->DR, (uint32_t)hi2s->pRxBuffPtr, hi2s->RxXferSize))
  {
    /* Update SPI error code */
    SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_DMA);
    hi2s->State = HAL_I2S_STATE_READY;
 
    __HAL_UNLOCK(hi2s);
    return HAL_ERROR;
  }
 
  /* Check if the I2S is already enabled */
  if (HAL_IS_BIT_CLR(hi2s->Instance->I2SCFGR, SPI_I2SCFGR_I2SE))
  {
    /* Enable I2S peripheral */
    __HAL_I2S_ENABLE(hi2s);
  }
 
  /* Check if the I2S Rx request is already enabled */
  if (HAL_IS_BIT_CLR(hi2s->Instance->CR2, SPI_CR2_RXDMAEN))
  {
    /* Enable Rx DMA Request */
    SET_BIT(hi2s->Instance->CR2, SPI_CR2_RXDMAEN);
  }
 
  __HAL_UNLOCK(hi2s);
  return HAL_OK;
}
 
HAL_StatusTypeDef HAL_I2S_DMAPause(I2S_HandleTypeDef *hi2s)
{
  /* Process Locked */
  __HAL_LOCK(hi2s);
 
  if (hi2s->State == HAL_I2S_STATE_BUSY_TX)
  {
    /* Disable the I2S DMA Tx request */
    CLEAR_BIT(hi2s->Instance->CR2, SPI_CR2_TXDMAEN);
  }
  else if (hi2s->State == HAL_I2S_STATE_BUSY_RX)
  {
    /* Disable the I2S DMA Rx request */
    CLEAR_BIT(hi2s->Instance->CR2, SPI_CR2_RXDMAEN);
  }
  else
  {
    /* nothing to do */
  }
 
  /* Process Unlocked */
  __HAL_UNLOCK(hi2s);
 
  return HAL_OK;
}
 
HAL_StatusTypeDef HAL_I2S_DMAResume(I2S_HandleTypeDef *hi2s)
{
  /* Process Locked */
  __HAL_LOCK(hi2s);
 
  if (hi2s->State == HAL_I2S_STATE_BUSY_TX)
  {
    /* Enable the I2S DMA Tx request */
    SET_BIT(hi2s->Instance->CR2, SPI_CR2_TXDMAEN);
  }
  else if (hi2s->State == HAL_I2S_STATE_BUSY_RX)
  {
    /* Enable the I2S DMA Rx request */
    SET_BIT(hi2s->Instance->CR2, SPI_CR2_RXDMAEN);
  }
  else
  {
    /* nothing to do */
  }
 
  /* If the I2S peripheral is still not enabled, enable it */
  if (HAL_IS_BIT_CLR(hi2s->Instance->I2SCFGR, SPI_I2SCFGR_I2SE))
  {
    /* Enable I2S peripheral */
    __HAL_I2S_ENABLE(hi2s);
  }
 
  /* Process Unlocked */
  __HAL_UNLOCK(hi2s);
 
  return HAL_OK;
}
 
HAL_StatusTypeDef HAL_I2S_DMAStop(I2S_HandleTypeDef *hi2s)
{
  HAL_StatusTypeDef errorcode = HAL_OK;
  /* The Lock is not implemented on this API to allow the user application
     to call the HAL SPI API under callbacks HAL_I2S_TxCpltCallback() or HAL_I2S_RxCpltCallback()
     when calling HAL_DMA_Abort() API the DMA TX or RX Transfer complete interrupt is generated
     and the correspond call back is executed HAL_I2S_TxCpltCallback() or HAL_I2S_RxCpltCallback()
     */
 
  /* Disable the I2S Tx/Rx DMA requests */
  CLEAR_BIT(hi2s->Instance->CR2, SPI_CR2_TXDMAEN);
  CLEAR_BIT(hi2s->Instance->CR2, SPI_CR2_RXDMAEN);
 
  /* Abort the I2S DMA tx Stream/Channel */
  if (hi2s->hdmatx != NULL)
  {
    /* Disable the I2S DMA tx Stream/Channel */
    if (HAL_OK != HAL_DMA_Abort(hi2s->hdmatx))
    {
      SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_DMA);
      errorcode = HAL_ERROR;
    }
  }
 
  /* Abort the I2S DMA rx Stream/Channel */
  if (hi2s->hdmarx != NULL)
  {
    /* Disable the I2S DMA rx Stream/Channel */
    if (HAL_OK != HAL_DMA_Abort(hi2s->hdmarx))
    {
      SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_DMA);
      errorcode = HAL_ERROR;
    }
  }
 
  /* Disable I2S peripheral */
  __HAL_I2S_DISABLE(hi2s);
 
  hi2s->State = HAL_I2S_STATE_READY;
 
  return errorcode;
}
 
void HAL_I2S_IRQHandler(I2S_HandleTypeDef *hi2s)
{
  uint32_t itsource = hi2s->Instance->CR2;
  uint32_t itflag   = hi2s->Instance->SR;
 
  /* I2S in mode Receiver ------------------------------------------------*/
  if ((I2S_CHECK_FLAG(itflag, I2S_FLAG_OVR) == RESET) &&
      (I2S_CHECK_FLAG(itflag, I2S_FLAG_RXNE) != RESET) && (I2S_CHECK_IT_SOURCE(itsource, I2S_IT_RXNE) != RESET))
  {
    I2S_Receive_IT(hi2s);
    return;
  }
 
  /* I2S in mode Tramitter -----------------------------------------------*/
  if ((I2S_CHECK_FLAG(itflag, I2S_FLAG_TXE) != RESET) && (I2S_CHECK_IT_SOURCE(itsource, I2S_IT_TXE) != RESET))
  {
    I2S_Transmit_IT(hi2s);
    return;
  }
 
  /* I2S interrupt error -------------------------------------------------*/
  if (I2S_CHECK_IT_SOURCE(itsource, I2S_IT_ERR) != RESET)
  {
    /* I2S Overrun error interrupt occurred ---------------------------------*/
    if (I2S_CHECK_FLAG(itflag, I2S_FLAG_OVR) != RESET)
    {
      /* Disable RXNE and ERR interrupt */
      __HAL_I2S_DISABLE_IT(hi2s, (I2S_IT_RXNE | I2S_IT_ERR));
 
      /* Set the error code and execute error callback*/
      SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_OVR);
    }
 
    /* I2S Underrun error interrupt occurred --------------------------------*/
    if (I2S_CHECK_FLAG(itflag, I2S_FLAG_UDR) != RESET)
    {
      /* Disable TXE and ERR interrupt */
      __HAL_I2S_DISABLE_IT(hi2s, (I2S_IT_TXE | I2S_IT_ERR));
 
      /* Set the error code and execute error callback*/
      SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_UDR);
    }
 
    /* Set the I2S State ready */
    hi2s->State = HAL_I2S_STATE_READY;
 
    /* Call user error callback */
#if (USE_HAL_I2S_REGISTER_CALLBACKS == 1U)
    hi2s->ErrorCallback(hi2s);
#else
    HAL_I2S_ErrorCallback(hi2s);
#endif /* USE_HAL_I2S_REGISTER_CALLBACKS */
  }
}
 
__weak void HAL_I2S_TxHalfCpltCallback(I2S_HandleTypeDef *hi2s)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2s);
 
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_I2S_TxHalfCpltCallback could be implemented in the user file
   */
}
 
__weak void HAL_I2S_TxCpltCallback(I2S_HandleTypeDef *hi2s)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2s);
 
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_I2S_TxCpltCallback could be implemented in the user file
   */
}
 
__weak void HAL_I2S_RxHalfCpltCallback(I2S_HandleTypeDef *hi2s)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2s);
 
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_I2S_RxHalfCpltCallback could be implemented in the user file
   */
}
 
__weak void HAL_I2S_RxCpltCallback(I2S_HandleTypeDef *hi2s)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2s);
 
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_I2S_RxCpltCallback could be implemented in the user file
   */
}
 
__weak void HAL_I2S_ErrorCallback(I2S_HandleTypeDef *hi2s)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hi2s);
 
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_I2S_ErrorCallback could be implemented in the user file
   */
}
 
HAL_I2S_StateTypeDef HAL_I2S_GetState(I2S_HandleTypeDef *hi2s)
{
  return hi2s->State;
}
 
uint32_t HAL_I2S_GetError(I2S_HandleTypeDef *hi2s)
{
  return hi2s->ErrorCode;
}
static uint32_t I2S_GetClockFreq(I2S_HandleTypeDef *hi2s)
{
  uint32_t tmpreg;
  /* This variable used to store the VCO Input (value in Hz) */
  uint32_t vcoinput;
  /* This variable used to store the I2S_CK_x (value in Hz) */
  uint32_t i2sclocksource;
 
  /* Configure I2S Clock based on I2S source clock selection */
 
  /* I2S_CLK_x : I2S Block Clock configuration for different clock sources selected */
  switch (hi2s->Init.ClockSource)
  {
    case I2S_CLOCK_PLL :
    {
      /* Configure the PLLI2S division factor */
      /* PLLI2S_VCO Input  = PLL_SOURCE/PLLI2SM */
      if ((RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) == RCC_PLLSOURCE_HSI)
      {
        /* In Case the PLL Source is HSI (Internal Clock) */
        vcoinput = (HSI_VALUE / (uint32_t)(RCC->PLLCFGR & RCC_PLLCFGR_PLLM));
      }
      else
      {
        /* In Case the PLL Source is HSE (External Clock) */
        vcoinput = ((HSE_VALUE / (uint32_t)(RCC->PLLCFGR & RCC_PLLCFGR_PLLM)));
      }
 
      /* PLLI2S_VCO Output = PLLI2S_VCO Input * PLLI2SN */
      /* I2S_CLK(first level) = PLLI2S_VCO Output/PLLI2SR */
      tmpreg = (RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SR) >> 28U;
      i2sclocksource = (vcoinput * ((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SN) >> 6U)) / (tmpreg);
 
      break;
    }
    case I2S_CLOCK_EXTERNAL :
    {
      i2sclocksource = EXTERNAL_CLOCK_VALUE;
      break;
    }
    default :
    {
      i2sclocksource = 0U;
      break;
    }
  }
 
  /* the return result is the value of I2S clock */
  return i2sclocksource;
}
 
static void I2S_DMATxCplt(DMA_HandleTypeDef *hdma)
{
  I2S_HandleTypeDef *hi2s = (I2S_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent; /* Derogation MISRAC2012-Rule-11.5 */
 
  /* if DMA is configured in DMA_NORMAL Mode */
  if (hdma->Init.Mode == DMA_NORMAL)
  {
    /* Disable Tx DMA Request */
    CLEAR_BIT(hi2s->Instance->CR2, SPI_CR2_TXDMAEN);
 
    hi2s->TxXferCount = 0U;
    hi2s->State = HAL_I2S_STATE_READY;
  }
  /* Call user Tx complete callback */
#if (USE_HAL_I2S_REGISTER_CALLBACKS == 1U)
  hi2s->TxCpltCallback(hi2s);
#else
  HAL_I2S_TxCpltCallback(hi2s);
#endif /* USE_HAL_I2S_REGISTER_CALLBACKS */
}
 
static void I2S_DMATxHalfCplt(DMA_HandleTypeDef *hdma)
{
  I2S_HandleTypeDef *hi2s = (I2S_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent; /* Derogation MISRAC2012-Rule-11.5 */
 
  /* Call user Tx half complete callback */
#if (USE_HAL_I2S_REGISTER_CALLBACKS == 1U)
  hi2s->TxHalfCpltCallback(hi2s);
#else
  HAL_I2S_TxHalfCpltCallback(hi2s);
#endif /* USE_HAL_I2S_REGISTER_CALLBACKS */
}
 
static void I2S_DMARxCplt(DMA_HandleTypeDef *hdma)
{
  I2S_HandleTypeDef *hi2s = (I2S_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent; /* Derogation MISRAC2012-Rule-11.5 */
 
  /* if DMA is configured in DMA_NORMAL Mode */
  if (hdma->Init.Mode == DMA_NORMAL)
  {
    /* Disable Rx DMA Request */
    CLEAR_BIT(hi2s->Instance->CR2, SPI_CR2_RXDMAEN);
    hi2s->RxXferCount = 0U;
    hi2s->State = HAL_I2S_STATE_READY;
  }
  /* Call user Rx complete callback */
#if (USE_HAL_I2S_REGISTER_CALLBACKS == 1U)
  hi2s->RxCpltCallback(hi2s);
#else
  HAL_I2S_RxCpltCallback(hi2s);
#endif /* USE_HAL_I2S_REGISTER_CALLBACKS */
}
 
static void I2S_DMARxHalfCplt(DMA_HandleTypeDef *hdma)
{
  I2S_HandleTypeDef *hi2s = (I2S_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent; /* Derogation MISRAC2012-Rule-11.5 */
 
  /* Call user Rx half complete callback */
#if (USE_HAL_I2S_REGISTER_CALLBACKS == 1U)
  hi2s->RxHalfCpltCallback(hi2s);
#else
  HAL_I2S_RxHalfCpltCallback(hi2s);
#endif /* USE_HAL_I2S_REGISTER_CALLBACKS */
}
 
static void I2S_DMAError(DMA_HandleTypeDef *hdma)
{
  I2S_HandleTypeDef *hi2s = (I2S_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent; /* Derogation MISRAC2012-Rule-11.5 */
 
  /* Disable Rx and Tx DMA Request */
  CLEAR_BIT(hi2s->Instance->CR2, (SPI_CR2_RXDMAEN | SPI_CR2_TXDMAEN));
  hi2s->TxXferCount = 0U;
  hi2s->RxXferCount = 0U;
 
  hi2s->State = HAL_I2S_STATE_READY;
 
  /* Set the error code and execute error callback*/
  SET_BIT(hi2s->ErrorCode, HAL_I2S_ERROR_DMA);
  /* Call user error callback */
#if (USE_HAL_I2S_REGISTER_CALLBACKS == 1U)
  hi2s->ErrorCallback(hi2s);
#else
  HAL_I2S_ErrorCallback(hi2s);
#endif /* USE_HAL_I2S_REGISTER_CALLBACKS */
}
 
static void I2S_Transmit_IT(I2S_HandleTypeDef *hi2s)
{
  /* Transmit data */
  hi2s->Instance->DR = (*hi2s->pTxBuffPtr);
  hi2s->pTxBuffPtr++;
  hi2s->TxXferCount--;
 
  if (hi2s->TxXferCount == 0U)
  {
    /* Disable TXE and ERR interrupt */
    __HAL_I2S_DISABLE_IT(hi2s, (I2S_IT_TXE | I2S_IT_ERR));
 
    hi2s->State = HAL_I2S_STATE_READY;
    /* Call user Tx complete callback */
#if (USE_HAL_I2S_REGISTER_CALLBACKS == 1U)
    hi2s->TxCpltCallback(hi2s);
#else
    HAL_I2S_TxCpltCallback(hi2s);
#endif /* USE_HAL_I2S_REGISTER_CALLBACKS */
  }
}
 
static void I2S_Receive_IT(I2S_HandleTypeDef *hi2s)
{
  /* Receive data */
  (*hi2s->pRxBuffPtr) = (uint16_t)hi2s->Instance->DR;
  hi2s->pRxBuffPtr++;
  hi2s->RxXferCount--;
 
  if (hi2s->RxXferCount == 0U)
  {
    /* Disable RXNE and ERR interrupt */
    __HAL_I2S_DISABLE_IT(hi2s, (I2S_IT_RXNE | I2S_IT_ERR));
 
    hi2s->State = HAL_I2S_STATE_READY;
    /* Call user Rx complete callback */
#if (USE_HAL_I2S_REGISTER_CALLBACKS == 1U)
    hi2s->RxCpltCallback(hi2s);
#else
    HAL_I2S_RxCpltCallback(hi2s);
#endif /* USE_HAL_I2S_REGISTER_CALLBACKS */
  }
}
 
static HAL_StatusTypeDef I2S_WaitFlagStateUntilTimeout(I2S_HandleTypeDef *hi2s, uint32_t Flag, FlagStatus State, uint32_t Timeout)
{
  uint32_t tickstart;
 
  /* Get tick */
  tickstart = HAL_GetTick();
 
  /* Wait until flag is set to status*/
  while (((__HAL_I2S_GET_FLAG(hi2s, Flag)) ? SET : RESET) != State)
  {
    if (Timeout != HAL_MAX_DELAY)
    {
      if (((HAL_GetTick() - tickstart) >= Timeout) || (Timeout == 0U))
      {
        /* Set the I2S State ready */
        hi2s->State = HAL_I2S_STATE_READY;
 
        /* Process Unlocked */
        __HAL_UNLOCK(hi2s);
 
        return HAL_TIMEOUT;
      }
    }
  }
  return HAL_OK;
}
 
#endif /* HAL_I2S_MODULE_ENABLED */
 
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/