DFSDM Private Functions

Functions
static uint32_t	DFSDM_GetInjChannelsNbr (uint32_t Channels)
	This function allows to get the number of injected channels. More...
static uint32_t	DFSDM_GetChannelFromInstance (const DFSDM_Channel_TypeDef *Instance)
	This function allows to get the channel number from channel instance. More...
static void	DFSDM_RegConvStart (DFSDM_Filter_HandleTypeDef *hdfsdm_filter)
	This function allows to really start regular conversion. More...
static void	DFSDM_RegConvStop (DFSDM_Filter_HandleTypeDef *hdfsdm_filter)
	This function allows to really stop regular conversion. More...
static void	DFSDM_InjConvStart (DFSDM_Filter_HandleTypeDef *hdfsdm_filter)
	This function allows to really start injected conversion. More...
static void	DFSDM_InjConvStop (DFSDM_Filter_HandleTypeDef *hdfsdm_filter)
	This function allows to really stop injected conversion. More...
static void	DFSDM_DMARegularHalfConvCplt (DMA_HandleTypeDef *hdma)
	DMA half transfer complete callback for regular conversion. More...
static void	DFSDM_DMARegularConvCplt (DMA_HandleTypeDef *hdma)
	DMA transfer complete callback for regular conversion. More...
static void	DFSDM_DMAInjectedHalfConvCplt (DMA_HandleTypeDef *hdma)
	DMA half transfer complete callback for injected conversion. More...
static void	DFSDM_DMAInjectedConvCplt (DMA_HandleTypeDef *hdma)
	DMA transfer complete callback for injected conversion. More...
static void	DFSDM_DMAError (DMA_HandleTypeDef *hdma)
	DMA error callback. More...

Detailed Description

Function Documentation

DFSDM_DMAError()

static void DFSDM_DMAError ( DMA_HandleTypeDef *  hdma )

static

DMA error callback.

Parameters

hdma	DMA handle.

Return values

None

Definition at line 3315 of file stm32l4xx_hal_dfsdm.c.

{
  /* Get DFSDM filter handle */
  DFSDM_Filter_HandleTypeDef *hdfsdm_filter = (DFSDM_Filter_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;

  /* Update error code */
  hdfsdm_filter->ErrorCode = DFSDM_FILTER_ERROR_DMA;

  /* Call error callback */
#if (USE_HAL_DFSDM_REGISTER_CALLBACKS == 1)
  hdfsdm_filter->ErrorCallback(hdfsdm_filter);
#else
  HAL_DFSDM_FilterErrorCallback(hdfsdm_filter);
#endif
}

DFSDM_DMAInjectedConvCplt()

static void DFSDM_DMAInjectedConvCplt ( DMA_HandleTypeDef *  hdma )

static

DMA transfer complete callback for injected conversion.

Parameters

hdma	DMA handle.

Return values

None

Definition at line 3297 of file stm32l4xx_hal_dfsdm.c.

{
  /* Get DFSDM filter handle */
  DFSDM_Filter_HandleTypeDef *hdfsdm_filter = (DFSDM_Filter_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;

  /* Call injected conversion complete callback */
#if (USE_HAL_DFSDM_REGISTER_CALLBACKS == 1)
  hdfsdm_filter->InjConvCpltCallback(hdfsdm_filter);
#else
  HAL_DFSDM_FilterInjConvCpltCallback(hdfsdm_filter);
#endif
}

DFSDM_DMAInjectedHalfConvCplt()

static void DFSDM_DMAInjectedHalfConvCplt ( DMA_HandleTypeDef *  hdma )

static

DMA half transfer complete callback for injected conversion.

Parameters

hdma	DMA handle.

Return values

None

Definition at line 3279 of file stm32l4xx_hal_dfsdm.c.

{
  /* Get DFSDM filter handle */
  DFSDM_Filter_HandleTypeDef *hdfsdm_filter = (DFSDM_Filter_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;

  /* Call injected half conversion complete callback */
#if (USE_HAL_DFSDM_REGISTER_CALLBACKS == 1)
  hdfsdm_filter->InjConvHalfCpltCallback(hdfsdm_filter);
#else
  HAL_DFSDM_FilterInjConvHalfCpltCallback(hdfsdm_filter);
#endif
}

DFSDM_DMARegularConvCplt()

static void DFSDM_DMARegularConvCplt ( DMA_HandleTypeDef *  hdma )

static

DMA transfer complete callback for regular conversion.

Parameters

hdma	DMA handle.

Return values

None

Definition at line 3261 of file stm32l4xx_hal_dfsdm.c.

{
  /* Get DFSDM filter handle */
  DFSDM_Filter_HandleTypeDef *hdfsdm_filter = (DFSDM_Filter_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;

  /* Call regular conversion complete callback */
#if (USE_HAL_DFSDM_REGISTER_CALLBACKS == 1)
  hdfsdm_filter->RegConvCpltCallback(hdfsdm_filter);
#else
  HAL_DFSDM_FilterRegConvCpltCallback(hdfsdm_filter);
#endif
}

DFSDM_DMARegularHalfConvCplt()

static void DFSDM_DMARegularHalfConvCplt ( DMA_HandleTypeDef *  hdma )

static

DMA half transfer complete callback for regular conversion.

Parameters

hdma	DMA handle.

Return values

None

Definition at line 3243 of file stm32l4xx_hal_dfsdm.c.

{
  /* Get DFSDM filter handle */
  DFSDM_Filter_HandleTypeDef *hdfsdm_filter = (DFSDM_Filter_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent;

  /* Call regular half conversion complete callback */
#if (USE_HAL_DFSDM_REGISTER_CALLBACKS == 1)
  hdfsdm_filter->RegConvHalfCpltCallback(hdfsdm_filter);
#else
  HAL_DFSDM_FilterRegConvHalfCpltCallback(hdfsdm_filter);
#endif
}

DFSDM_GetChannelFromInstance()

static uint32_t DFSDM_GetChannelFromInstance ( const DFSDM_Channel_TypeDef *  Instance )

static

This function allows to get the channel number from channel instance.

Parameters

Instance

DFSDM channel instance.

Return values

Channel

number.

Definition at line 3359 of file stm32l4xx_hal_dfsdm.c.

{
  uint32_t channel;

  /* Get channel from instance */
  if (Instance == DFSDM1_Channel0)
  {
    channel = 0;
  }
  else if (Instance == DFSDM1_Channel1)
  {
    channel = 1;
  }
  else if (Instance == DFSDM1_Channel2)
  {
    channel = 2;
  }
  else if (Instance == DFSDM1_Channel3)
  {
    channel = 3;
  }
#if defined(STM32L471xx) || defined(STM32L475xx) || defined(STM32L476xx) || defined(STM32L485xx) || defined(STM32L486xx) || \
    defined(STM32L496xx) || defined(STM32L4A6xx) || \
    defined(STM32L4R5xx) || defined(STM32L4R7xx) || defined(STM32L4R9xx) || defined(STM32L4S5xx) || defined(STM32L4S7xx) || defined(STM32L4S9xx)
  else if (Instance == DFSDM1_Channel4)
  {
    channel = 4;
  }
  else if (Instance == DFSDM1_Channel5)
  {
    channel = 5;
  }
  else if (Instance == DFSDM1_Channel6)
  {
    channel = 6;
  }
  else if (Instance == DFSDM1_Channel7)
  {
    channel = 7;
  }
#endif /* STM32L471xx || STM32L475xx || STM32L476xx || STM32L485xx || STM32L486xx || STM32L496xx || STM32L4A6xx || STM32L4R5xx || STM32L4R7xx || STM32L4R9xx || STM32L4S5xx || STM32L4S7xx || STM32L4S9xx */
  else
  {
    channel = 0;
  }

  return channel;
}

DFSDM_GetInjChannelsNbr()

static uint32_t DFSDM_GetInjChannelsNbr ( uint32_t  Channels )

static

This function allows to get the number of injected channels.

Parameters

Channels

bitfield of injected channels.

Return values

Number

of injected channels.

Definition at line 3336 of file stm32l4xx_hal_dfsdm.c.

{
  uint32_t nbChannels = 0;
  uint32_t tmp;

  /* Get the number of channels from bitfield */
  tmp = (uint32_t)(Channels & DFSDM_LSB_MASK);
  while (tmp != 0U)
  {
    if ((tmp & 1U) != 0U)
    {
      nbChannels++;
    }
    tmp = (uint32_t)(tmp >> 1);
  }
  return nbChannels;
}

DFSDM_InjConvStart()

static void DFSDM_InjConvStart ( DFSDM_Filter_HandleTypeDef *  hdfsdm_filter )

static

This function allows to really start injected conversion.

Parameters

hdfsdm_filter

DFSDM filter handle.

Return values

None

Definition at line 3490 of file stm32l4xx_hal_dfsdm.c.

{
  /* Check injected trigger */
  if (hdfsdm_filter->InjectedTrigger == DFSDM_FILTER_SW_TRIGGER)
  {
    /* Software start of injected conversion */
    hdfsdm_filter->Instance->FLTCR1 |= DFSDM_FLTCR1_JSWSTART;
  }
  else /* external or synchronous trigger */
  {
    /* Disable DFSDM filter */
    hdfsdm_filter->Instance->FLTCR1 &= ~(DFSDM_FLTCR1_DFEN);

    if (hdfsdm_filter->InjectedTrigger == DFSDM_FILTER_SYNC_TRIGGER)
    {
      /* Set JSYNC bit in DFSDM_FLTCR1 register */
      hdfsdm_filter->Instance->FLTCR1 |= DFSDM_FLTCR1_JSYNC;
    }
    else /* external trigger */
    {
      /* Set JEXTEN[1:0] bits in DFSDM_FLTCR1 register */
      hdfsdm_filter->Instance->FLTCR1 |= hdfsdm_filter->ExtTriggerEdge;
    }

    /* Enable DFSDM filter */
    hdfsdm_filter->Instance->FLTCR1 |= DFSDM_FLTCR1_DFEN;

    /* If regular conversion was in progress, restart it */
    if ((hdfsdm_filter->State == HAL_DFSDM_FILTER_STATE_REG) && \
        (hdfsdm_filter->RegularTrigger == DFSDM_FILTER_SW_TRIGGER))
    {
      hdfsdm_filter->Instance->FLTCR1 |= DFSDM_FLTCR1_RSWSTART;
    }
  }
  /* Update DFSDM filter state */
  hdfsdm_filter->State = (hdfsdm_filter->State == HAL_DFSDM_FILTER_STATE_READY) ? \
                         HAL_DFSDM_FILTER_STATE_INJ : HAL_DFSDM_FILTER_STATE_REG_INJ;
}

DFSDM_InjConvStop()

static void DFSDM_InjConvStop ( DFSDM_Filter_HandleTypeDef *  hdfsdm_filter )

static

This function allows to really stop injected conversion.

Parameters

hdfsdm_filter

DFSDM filter handle.

Return values

None

Definition at line 3534 of file stm32l4xx_hal_dfsdm.c.

{
  /* Disable DFSDM filter */
  hdfsdm_filter->Instance->FLTCR1 &= ~(DFSDM_FLTCR1_DFEN);

  /* If injected trigger was synchronous, reset JSYNC bit in DFSDM_FLTCR1 register */
  if (hdfsdm_filter->InjectedTrigger == DFSDM_FILTER_SYNC_TRIGGER)
  {
    hdfsdm_filter->Instance->FLTCR1 &= ~(DFSDM_FLTCR1_JSYNC);
  }
  else if (hdfsdm_filter->InjectedTrigger == DFSDM_FILTER_EXT_TRIGGER)
  {
    /* Reset JEXTEN[1:0] bits in DFSDM_FLTCR1 register */
    hdfsdm_filter->Instance->FLTCR1 &= ~(DFSDM_FLTCR1_JEXTEN);
  }
  else
  {
    /* Nothing to do */
  }

  /* Enable DFSDM filter */
  hdfsdm_filter->Instance->FLTCR1 |= DFSDM_FLTCR1_DFEN;

  /* If regular conversion was in progress, restart it */
  if ((hdfsdm_filter->State == HAL_DFSDM_FILTER_STATE_REG_INJ) && \
      (hdfsdm_filter->RegularTrigger == DFSDM_FILTER_SW_TRIGGER))
  {
    hdfsdm_filter->Instance->FLTCR1 |= DFSDM_FLTCR1_RSWSTART;
  }

  /* Update remaining injected conversions */
  hdfsdm_filter->InjConvRemaining = (hdfsdm_filter->InjectedScanMode == ENABLE) ? \
                                    hdfsdm_filter->InjectedChannelsNbr : 1U;

  /* Update DFSDM filter state */
  hdfsdm_filter->State = (hdfsdm_filter->State == HAL_DFSDM_FILTER_STATE_INJ) ? \
                         HAL_DFSDM_FILTER_STATE_READY : HAL_DFSDM_FILTER_STATE_REG;
}

DFSDM_RegConvStart()

static void DFSDM_RegConvStart ( DFSDM_Filter_HandleTypeDef *  hdfsdm_filter )

static

This function allows to really start regular conversion.

Parameters

hdfsdm_filter

DFSDM filter handle.

Return values

None

Definition at line 3413 of file stm32l4xx_hal_dfsdm.c.

{
  /* Check regular trigger */
  if (hdfsdm_filter->RegularTrigger == DFSDM_FILTER_SW_TRIGGER)
  {
    /* Software start of regular conversion */
    hdfsdm_filter->Instance->FLTCR1 |= DFSDM_FLTCR1_RSWSTART;
  }
  else /* synchronous trigger */
  {
    /* Disable DFSDM filter */
    hdfsdm_filter->Instance->FLTCR1 &= ~(DFSDM_FLTCR1_DFEN);

    /* Set RSYNC bit in DFSDM_FLTCR1 register */
    hdfsdm_filter->Instance->FLTCR1 |= DFSDM_FLTCR1_RSYNC;

    /* Enable DFSDM  filter */
    hdfsdm_filter->Instance->FLTCR1 |= DFSDM_FLTCR1_DFEN;

    /* If injected conversion was in progress, restart it */
    if (hdfsdm_filter->State == HAL_DFSDM_FILTER_STATE_INJ)
    {
      if (hdfsdm_filter->InjectedTrigger == DFSDM_FILTER_SW_TRIGGER)
      {
        hdfsdm_filter->Instance->FLTCR1 |= DFSDM_FLTCR1_JSWSTART;
      }
      /* Update remaining injected conversions */
      hdfsdm_filter->InjConvRemaining = (hdfsdm_filter->InjectedScanMode == ENABLE) ? \
                                        hdfsdm_filter->InjectedChannelsNbr : 1U;
    }
  }
  /* Update DFSDM filter state */
  hdfsdm_filter->State = (hdfsdm_filter->State == HAL_DFSDM_FILTER_STATE_READY) ? \
                         HAL_DFSDM_FILTER_STATE_REG : HAL_DFSDM_FILTER_STATE_REG_INJ;
}

DFSDM_RegConvStop()

static void DFSDM_RegConvStop ( DFSDM_Filter_HandleTypeDef *  hdfsdm_filter )

static

This function allows to really stop regular conversion.

Parameters

hdfsdm_filter

DFSDM filter handle.

Return values

None

Definition at line 3454 of file stm32l4xx_hal_dfsdm.c.

{
  /* Disable DFSDM filter */
  hdfsdm_filter->Instance->FLTCR1 &= ~(DFSDM_FLTCR1_DFEN);

  /* If regular trigger was synchronous, reset RSYNC bit in DFSDM_FLTCR1 register */
  if (hdfsdm_filter->RegularTrigger == DFSDM_FILTER_SYNC_TRIGGER)
  {
    hdfsdm_filter->Instance->FLTCR1 &= ~(DFSDM_FLTCR1_RSYNC);
  }

  /* Enable DFSDM filter */
  hdfsdm_filter->Instance->FLTCR1 |= DFSDM_FLTCR1_DFEN;

  /* If injected conversion was in progress, restart it */
  if (hdfsdm_filter->State == HAL_DFSDM_FILTER_STATE_REG_INJ)
  {
    if (hdfsdm_filter->InjectedTrigger == DFSDM_FILTER_SW_TRIGGER)
    {
      hdfsdm_filter->Instance->FLTCR1 |= DFSDM_FLTCR1_JSWSTART;
    }
    /* Update remaining injected conversions */
    hdfsdm_filter->InjConvRemaining = (hdfsdm_filter->InjectedScanMode == ENABLE) ? \
                                      hdfsdm_filter->InjectedChannelsNbr : 1U;
  }

  /* Update DFSDM filter state */
  hdfsdm_filter->State = (hdfsdm_filter->State == HAL_DFSDM_FILTER_STATE_REG) ? \
                         HAL_DFSDM_FILTER_STATE_READY : HAL_DFSDM_FILTER_STATE_INJ;
}