Get system and peripherals clocks frequency functions

Return the frequencies of different on chip clocks; System, AHB, APB1 and APB2 buses clocks and different peripheral clocks available on the device. More...

Functions
void	LL_RCC_GetSystemClocksFreq (LL_RCC_ClocksTypeDef *RCC_Clocks)
	Return the frequencies of different on chip clocks; System, AHB, APB1 and APB2 buses clocks. More...
uint32_t	LL_RCC_GetUSARTClockFreq (uint32_t USARTxSource)
	Return USARTx clock frequency. More...
uint32_t	LL_RCC_GetUARTClockFreq (uint32_t UARTxSource)
	Return UARTx clock frequency. More...
uint32_t	LL_RCC_GetI2CClockFreq (uint32_t I2CxSource)
	Return I2Cx clock frequency. More...
uint32_t	LL_RCC_GetLPUARTClockFreq (uint32_t LPUARTxSource)
	Return LPUARTx clock frequency. More...
uint32_t	LL_RCC_GetLPTIMClockFreq (uint32_t LPTIMxSource)
	Return LPTIMx clock frequency. More...
uint32_t	LL_RCC_GetSAIClockFreq (uint32_t SAIxSource)
	Return SAIx clock frequency. More...
uint32_t	LL_RCC_GetSDMMCKernelClockFreq (uint32_t SDMMCxSource)
	Return SDMMCx kernel clock frequency. More...
uint32_t	LL_RCC_GetSDMMCClockFreq (uint32_t SDMMCxSource)
	Return SDMMCx clock frequency. More...
uint32_t	LL_RCC_GetRNGClockFreq (uint32_t RNGxSource)
	Return RNGx clock frequency. More...
uint32_t	LL_RCC_GetUSBClockFreq (uint32_t USBxSource)
	Return USBx clock frequency. More...
uint32_t	LL_RCC_GetADCClockFreq (uint32_t ADCxSource)
	Return ADCx clock frequency. More...
uint32_t	LL_RCC_GetSWPMIClockFreq (uint32_t SWPMIxSource)
	Return SWPMIx clock frequency. More...
uint32_t	LL_RCC_GetDFSDMClockFreq (uint32_t DFSDMxSource)
	Return DFSDMx clock frequency. More...
uint32_t	LL_RCC_GetDFSDMAudioClockFreq (uint32_t DFSDMxSource)
	Return DFSDMx Audio clock frequency. More...
uint32_t	LL_RCC_GetLTDCClockFreq (uint32_t LTDCxSource)
	Return LTDC clock frequency. More...
uint32_t	LL_RCC_GetDSIClockFreq (uint32_t DSIxSource)
	Return DSI clock frequency. More...
uint32_t	LL_RCC_GetOCTOSPIClockFreq (uint32_t OCTOSPIxSource)
	Return OCTOSPI clock frequency. More...

Detailed Description

Return the frequencies of different on chip clocks; System, AHB, APB1 and APB2 buses clocks and different peripheral clocks available on the device.

Note

If SYSCLK source is MSI, function returns values based on MSI_VALUE(*)

If SYSCLK source is HSI, function returns values based on HSI_VALUE(**)

If SYSCLK source is HSE, function returns values based on HSE_VALUE(***)

If SYSCLK source is PLL, function returns values based on HSE_VALUE(***) or HSI_VALUE(**) or MSI_VALUE(*) multiplied/divided by the PLL factors.

(*) MSI_VALUE is a constant defined in this file (default value 4 MHz) but the real value may vary depending on the variations in voltage and temperature.

(**) HSI_VALUE is a constant defined in this file (default value 16 MHz) but the real value may vary depending on the variations in voltage and temperature.

(***) HSE_VALUE is a constant defined in this file (default value 8 MHz), user has to ensure that HSE_VALUE is same as the real frequency of the crystal used. Otherwise, this function may have wrong result.

The result of this function could be incorrect when using fractional value for HSE crystal.

This function can be used by the user application to compute the baud-rate for the communication peripherals or configure other parameters.

Function Documentation

LL_RCC_GetADCClockFreq()

uint32_t LL_RCC_GetADCClockFreq

(

uint32_t

ADCxSource

)

Return ADCx clock frequency.

Parameters

ADCxSource

This parameter can be one of the following values: LL_RCC_ADC_CLKSOURCE

Return values

ADC	clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (MSI) or PLL is not ready LL_RCC_PERIPH_FREQUENCY_NA indicates that no clock source selected

Definition at line 1178 of file stm32l4xx_ll_rcc.c.

{
  uint32_t adc_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_ADC_CLKSOURCE(ADCxSource));

  /* ADCCLK clock frequency */
  switch (LL_RCC_GetADCClockSource(ADCxSource))
  {
#if defined(RCC_PLLSAI1_SUPPORT)
    case LL_RCC_ADC_CLKSOURCE_PLLSAI1:       /* PLLSAI1 clock used as ADC clock source */
      if (LL_RCC_PLLSAI1_IsReady() != 0U)
      {
        adc_frequency = RCC_PLLSAI1_GetFreqDomain_ADC();
      }
      break;
#endif /* RCC_PLLSAI1_SUPPORT */

#if defined(RCC_PLLSAI2_SUPPORT) && defined(LL_RCC_ADC_CLKSOURCE_PLLSAI2)
    case LL_RCC_ADC_CLKSOURCE_PLLSAI2:       /* PLLSAI2 clock used as ADC clock source */
      if (LL_RCC_PLLSAI2_IsReady() != 0U)
      {
         adc_frequency = RCC_PLLSAI2_GetFreqDomain_ADC();
      }
      break;
#endif /* RCC_PLLSAI2_SUPPORT && LL_RCC_ADC_CLKSOURCE_PLLSAI2 */

    case LL_RCC_ADC_CLKSOURCE_SYSCLK:        /* SYSCLK clock used as ADC clock source */
      adc_frequency = RCC_GetSystemClockFreq();
      break;

    case LL_RCC_ADC_CLKSOURCE_NONE:          /* No clock used as ADC clock source */
    default:
      adc_frequency = LL_RCC_PERIPH_FREQUENCY_NA;
      break;
  }

  return adc_frequency;
}

LL_RCC_GetDFSDMAudioClockFreq()

uint32_t LL_RCC_GetDFSDMAudioClockFreq

(

uint32_t

DFSDMxSource

)

Return DFSDMx Audio clock frequency.

Parameters

DFSDMxSource

This parameter can be one of the following values: LL_RCC_DFSDM1_AUDIO_CLKSOURCE

Return values

DFSDM

clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator is not ready

Definition at line 1296 of file stm32l4xx_ll_rcc.c.

{
  uint32_t dfsdm_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_DFSDM_AUDIO_CLKSOURCE(DFSDMxSource));

  /* DFSDM1CLK clock frequency */
  switch (LL_RCC_GetDFSDMAudioClockSource(DFSDMxSource))
  {
    case LL_RCC_DFSDM1_AUDIO_CLKSOURCE_SAI1:     /* SAI1 clock used as DFSDM1 audio clock */
      dfsdm_frequency = LL_RCC_GetSAIClockFreq(LL_RCC_SAI1_CLKSOURCE);
      break;

    case LL_RCC_DFSDM1_AUDIO_CLKSOURCE_MSI:      /* MSI clock used as DFSDM1 audio clock */
      if (LL_RCC_MSI_IsReady() != 0U)
      {
        dfsdm_frequency = __LL_RCC_CALC_MSI_FREQ(LL_RCC_MSI_IsEnabledRangeSelect(),
                                    ((LL_RCC_MSI_IsEnabledRangeSelect() != 0U) ?
                                     LL_RCC_MSI_GetRange() :
                                     LL_RCC_MSI_GetRangeAfterStandby()));
      }
      break;

    case LL_RCC_DFSDM1_AUDIO_CLKSOURCE_HSI:      /* HSI clock used as DFSDM1 audio clock */
    default:
      if (LL_RCC_HSI_IsReady() != 0U)
      {
        dfsdm_frequency = HSI_VALUE;
      }
      break;
  }

  return dfsdm_frequency;
}

LL_RCC_GetDFSDMClockFreq()

uint32_t LL_RCC_GetDFSDMClockFreq

(

uint32_t

DFSDMxSource

)

Return DFSDMx clock frequency.

Parameters

DFSDMxSource

This parameter can be one of the following values: LL_RCC_DFSDM1_CLKSOURCE

Return values

DFSDM

clock frequency (in Hz)

Definition at line 1263 of file stm32l4xx_ll_rcc.c.

{
  uint32_t dfsdm_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_DFSDM_CLKSOURCE(DFSDMxSource));

  /* DFSDM1CLK clock frequency */
  switch (LL_RCC_GetDFSDMClockSource(DFSDMxSource))
  {
    case LL_RCC_DFSDM1_CLKSOURCE_SYSCLK:     /* DFSDM1 Clock is SYSCLK */
      dfsdm_frequency = RCC_GetSystemClockFreq();
      break;

    case LL_RCC_DFSDM1_CLKSOURCE_PCLK2:      /* DFSDM1 Clock is PCLK2 */
      dfsdm_frequency = RCC_GetPCLK2ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
      break;

    default:
      break;
  }

  return dfsdm_frequency;
}

LL_RCC_GetDSIClockFreq()

uint32_t LL_RCC_GetDSIClockFreq

(

uint32_t

DSIxSource

)

Return DSI clock frequency.

Parameters

DSIxSource

This parameter can be one of the following values: LL_RCC_DSI_CLKSOURCE

Return values

DSI	clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator is not ready LL_RCC_PERIPH_FREQUENCY_NA indicates that external clock is used

Definition at line 1343 of file stm32l4xx_ll_rcc.c.

{
  uint32_t dsi_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_DSI_CLKSOURCE(DSIxSource));

  /* DSICLK clock frequency */
  switch (LL_RCC_GetDSIClockSource(DSIxSource))
  {
    case LL_RCC_DSI_CLKSOURCE_PLL:     /* DSI Clock is PLLSAI2 Osc. */
      if (LL_RCC_PLLSAI2_IsReady() != 0U)
      {
        dsi_frequency = RCC_PLLSAI2_GetFreqDomain_DSI();
      }
      break;

    case LL_RCC_DSI_CLKSOURCE_PHY:    /* DSI Clock is DSI physical clock. */
    default:
      dsi_frequency = LL_RCC_PERIPH_FREQUENCY_NA;
      break;
  }

  return dsi_frequency;
}

LL_RCC_GetI2CClockFreq()

uint32_t LL_RCC_GetI2CClockFreq

(

uint32_t

I2CxSource

)

Return I2Cx clock frequency.

Parameters

I2CxSource

This parameter can be one of the following values: LL_RCC_I2C1_CLKSOURCE LL_RCC_I2C2_CLKSOURCE (*) LL_RCC_I2C3_CLKSOURCE LL_RCC_I2C4_CLKSOURCE (*) (*) value not defined in all devices.

Return values

I2C	clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that HSI oscillator is not ready

Definition at line 563 of file stm32l4xx_ll_rcc.c.

{
  uint32_t i2c_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_I2C_CLKSOURCE(I2CxSource));

  if (I2CxSource == LL_RCC_I2C1_CLKSOURCE)
  {
    /* I2C1 CLK clock frequency */
    switch (LL_RCC_GetI2CClockSource(I2CxSource))
    {
      case LL_RCC_I2C1_CLKSOURCE_SYSCLK: /* I2C1 Clock is System Clock */
        i2c_frequency = RCC_GetSystemClockFreq();
        break;

      case LL_RCC_I2C1_CLKSOURCE_HSI:    /* I2C1 Clock is HSI Osc. */
        if (LL_RCC_HSI_IsReady() != 0U)
        {
          i2c_frequency = HSI_VALUE;
        }
        break;

      case LL_RCC_I2C1_CLKSOURCE_PCLK1:  /* I2C1 Clock is PCLK1 */
        i2c_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
        break;

      default:
        break;
    }
  }
#if defined(RCC_CCIPR_I2C2SEL)
  else if (I2CxSource == LL_RCC_I2C2_CLKSOURCE)
  {
    /* I2C2 CLK clock frequency */
    switch (LL_RCC_GetI2CClockSource(I2CxSource))
    {
      case LL_RCC_I2C2_CLKSOURCE_SYSCLK: /* I2C2 Clock is System Clock */
        i2c_frequency = RCC_GetSystemClockFreq();
        break;

      case LL_RCC_I2C2_CLKSOURCE_HSI:    /* I2C2 Clock is HSI Osc. */
        if (LL_RCC_HSI_IsReady() != 0U)
        {
          i2c_frequency = HSI_VALUE;
        }
        break;

      case LL_RCC_I2C2_CLKSOURCE_PCLK1:  /* I2C2 Clock is PCLK1 */
        i2c_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
        break;

      default:
        break;
    }
  }
#endif /*RCC_CCIPR_I2C2SEL*/
  else
  {
    if (I2CxSource == LL_RCC_I2C3_CLKSOURCE)
    {
      /* I2C3 CLK clock frequency */
      switch (LL_RCC_GetI2CClockSource(I2CxSource))
      {
        case LL_RCC_I2C3_CLKSOURCE_SYSCLK: /* I2C3 Clock is System Clock */
          i2c_frequency = RCC_GetSystemClockFreq();
          break;

        case LL_RCC_I2C3_CLKSOURCE_HSI:    /* I2C3 Clock is HSI Osc. */
          if (LL_RCC_HSI_IsReady() != 0U)
          {
            i2c_frequency = HSI_VALUE;
          }
          break;

        case LL_RCC_I2C3_CLKSOURCE_PCLK1:  /* I2C3 Clock is PCLK1 */
          i2c_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
          break;

        default:
          break;
      }
    }
#if defined(RCC_CCIPR2_I2C4SEL)
    else
    {
      if (I2CxSource == LL_RCC_I2C4_CLKSOURCE)
      {
        /* I2C4 CLK clock frequency */
        switch (LL_RCC_GetI2CClockSource(I2CxSource))
        {
          case LL_RCC_I2C4_CLKSOURCE_SYSCLK: /* I2C4 Clock is System Clock */
            i2c_frequency = RCC_GetSystemClockFreq();
            break;

          case LL_RCC_I2C4_CLKSOURCE_HSI:    /* I2C4 Clock is HSI Osc. */
            if (LL_RCC_HSI_IsReady() != 0U)
            {
              i2c_frequency = HSI_VALUE;
            }
            break;

          case LL_RCC_I2C4_CLKSOURCE_PCLK1:  /* I2C4 Clock is PCLK1 */
            i2c_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
            break;

          default:
            break;
        }
      }
    }
#endif /*RCC_CCIPR2_I2C4SEL*/
  }

  return i2c_frequency;
}

LL_RCC_GetLPTIMClockFreq()

uint32_t LL_RCC_GetLPTIMClockFreq

(

uint32_t

LPTIMxSource

)

Return LPTIMx clock frequency.

Parameters

LPTIMxSource

This parameter can be one of the following values: LL_RCC_LPTIM1_CLKSOURCE LL_RCC_LPTIM2_CLKSOURCE

Return values

LPTIM

clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI, LSI or LSE) is not ready

Definition at line 735 of file stm32l4xx_ll_rcc.c.

{
  uint32_t lptim_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_LPTIM_CLKSOURCE(LPTIMxSource));

  if (LPTIMxSource == LL_RCC_LPTIM1_CLKSOURCE)
  {
    /* LPTIM1CLK clock frequency */
    switch (LL_RCC_GetLPTIMClockSource(LPTIMxSource))
    {
      case LL_RCC_LPTIM1_CLKSOURCE_LSI:    /* LPTIM1 Clock is LSI Osc. */
        if (LL_RCC_LSI_IsReady() != 0U)
        {
#if defined(RCC_CSR_LSIPREDIV)
          if (LL_RCC_LSI_GetPrediv() == LL_RCC_LSI_PREDIV_128)
          {
            lptim_frequency = LSI_VALUE / 128U;
          }
          else
#endif /* RCC_CSR_LSIPREDIV */
          {
            lptim_frequency = LSI_VALUE;
          }
        }
        break;

      case LL_RCC_LPTIM1_CLKSOURCE_HSI:    /* LPTIM1 Clock is HSI Osc. */
        if (LL_RCC_HSI_IsReady() != 0U)
        {
          lptim_frequency = HSI_VALUE;
        }
        break;

      case LL_RCC_LPTIM1_CLKSOURCE_LSE:    /* LPTIM1 Clock is LSE Osc. */
        if (LL_RCC_LSE_IsReady() != 0U)
        {
          lptim_frequency = LSE_VALUE;
        }
        break;

      case LL_RCC_LPTIM1_CLKSOURCE_PCLK1:  /* LPTIM1 Clock is PCLK1 */
        lptim_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
        break;

      default:
        break;
    }
  }
  else
  {
    if (LPTIMxSource == LL_RCC_LPTIM2_CLKSOURCE)
    {
      /* LPTIM2CLK clock frequency */
      switch (LL_RCC_GetLPTIMClockSource(LPTIMxSource))
      {
        case LL_RCC_LPTIM2_CLKSOURCE_LSI:    /* LPTIM2 Clock is LSI Osc. */
          if (LL_RCC_LSI_IsReady() != 0U)
          {
#if defined(RCC_CSR_LSIPREDIV)
            if (LL_RCC_LSI_GetPrediv() == LL_RCC_LSI_PREDIV_128)
            {
              lptim_frequency = LSI_VALUE / 128U;
            }
            else
#endif /* RCC_CSR_LSIPREDIV */
            {
              lptim_frequency = LSI_VALUE;
            }
          }
          break;

        case LL_RCC_LPTIM2_CLKSOURCE_HSI:    /* LPTIM2 Clock is HSI Osc. */
          if (LL_RCC_HSI_IsReady() != 0U)
          {
            lptim_frequency = HSI_VALUE;
          }
          break;

        case LL_RCC_LPTIM2_CLKSOURCE_LSE:    /* LPTIM2 Clock is LSE Osc. */
          if (LL_RCC_LSE_IsReady() != 0U)
          {
            lptim_frequency = LSE_VALUE;
          }
          break;

        case LL_RCC_LPTIM2_CLKSOURCE_PCLK1:  /* LPTIM2 Clock is PCLK1 */
          lptim_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
          break;

        default:
          break;
      }
    }
  }

  return lptim_frequency;
}

LL_RCC_GetLPUARTClockFreq()

uint32_t LL_RCC_GetLPUARTClockFreq

(

uint32_t

LPUARTxSource

)

Return LPUARTx clock frequency.

Parameters

LPUARTxSource

This parameter can be one of the following values: LL_RCC_LPUART1_CLKSOURCE

Return values

LPUART

clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI or LSE) is not ready

Definition at line 688 of file stm32l4xx_ll_rcc.c.

{
  uint32_t lpuart_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_LPUART_CLKSOURCE(LPUARTxSource));

  /* LPUART1CLK clock frequency */
  switch (LL_RCC_GetLPUARTClockSource(LPUARTxSource))
  {
    case LL_RCC_LPUART1_CLKSOURCE_SYSCLK: /* LPUART1 Clock is System Clock */
      lpuart_frequency = RCC_GetSystemClockFreq();
      break;

    case LL_RCC_LPUART1_CLKSOURCE_HSI:    /* LPUART1 Clock is HSI Osc. */
      if (LL_RCC_HSI_IsReady() != 0U)
      {
        lpuart_frequency = HSI_VALUE;
      }
      break;

    case LL_RCC_LPUART1_CLKSOURCE_LSE:    /* LPUART1 Clock is LSE Osc. */
      if (LL_RCC_LSE_IsReady() != 0U)
      {
        lpuart_frequency = LSE_VALUE;
      }
      break;

    case LL_RCC_LPUART1_CLKSOURCE_PCLK1:  /* LPUART1 Clock is PCLK1 */
      lpuart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
      break;

    default:
      break;
  }

  return lpuart_frequency;
}

LL_RCC_GetLTDCClockFreq()

uint32_t LL_RCC_GetLTDCClockFreq

(

uint32_t

LTDCxSource

)

Return LTDC clock frequency.

Parameters

LTDCxSource

This parameter can be one of the following values: LL_RCC_LTDC_CLKSOURCE

Return values

LTDC	clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator PLLSAI is not ready

Definition at line 1378 of file stm32l4xx_ll_rcc.c.

{
  uint32_t ltdc_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_LTDC_CLKSOURCE(LTDCxSource));

  if (LL_RCC_PLLSAI2_IsReady() != 0U)
  {
     ltdc_frequency = RCC_PLLSAI2_GetFreqDomain_LTDC();
  }

  return ltdc_frequency;
}

LL_RCC_GetOCTOSPIClockFreq()

uint32_t LL_RCC_GetOCTOSPIClockFreq

(

uint32_t

OCTOSPIxSource

)

Return OCTOSPI clock frequency.

Parameters

OCTOSPIxSource

This parameter can be one of the following values: LL_RCC_OCTOSPI_CLKSOURCE

Return values

OCTOSPI

clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator PLLSAI is not ready

Definition at line 1402 of file stm32l4xx_ll_rcc.c.

{
  uint32_t octospi_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_OCTOSPI_CLKSOURCE(OCTOSPIxSource));

  /* OCTOSPI clock frequency */
  switch (LL_RCC_GetOCTOSPIClockSource(OCTOSPIxSource))
  {
    case LL_RCC_OCTOSPI_CLKSOURCE_SYSCLK:   /* OCTOSPI clock is SYSCLK */
      octospi_frequency = RCC_GetSystemClockFreq();
      break;

    case LL_RCC_OCTOSPI_CLKSOURCE_MSI:      /* MSI clock used as OCTOSPI clock */
      if (LL_RCC_MSI_IsReady() != 0U)
      {
        octospi_frequency = __LL_RCC_CALC_MSI_FREQ(LL_RCC_MSI_IsEnabledRangeSelect(),
                                     ((LL_RCC_MSI_IsEnabledRangeSelect() != 0U) ?
                                      LL_RCC_MSI_GetRange() :
                                      LL_RCC_MSI_GetRangeAfterStandby()));
      }
      break;

    case LL_RCC_OCTOSPI_CLKSOURCE_PLL:      /* PLL clock used as OCTOSPI source */
      if (LL_RCC_PLL_IsReady() != 0U)
      {
        octospi_frequency = RCC_PLL_GetFreqDomain_48M();
      }
      break;

    default:
      octospi_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
      break;
  }

  return octospi_frequency;
}

LL_RCC_GetRNGClockFreq()

uint32_t LL_RCC_GetRNGClockFreq

(

uint32_t

RNGxSource

)

Return RNGx clock frequency.

Parameters

RNGxSource

This parameter can be one of the following values: LL_RCC_RNG_CLKSOURCE

Return values

RNG	clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (MSI) or PLL is not ready LL_RCC_PERIPH_FREQUENCY_NA indicates that no clock source selected

Definition at line 1049 of file stm32l4xx_ll_rcc.c.

{
  uint32_t rng_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_RNG_CLKSOURCE(RNGxSource));

  /* RNGCLK clock frequency */
  switch (LL_RCC_GetRNGClockSource(RNGxSource))
  {
#if defined(RCC_PLLSAI1_SUPPORT)
    case LL_RCC_RNG_CLKSOURCE_PLLSAI1:       /* PLLSAI1 clock used as RNG clock source */
      if (LL_RCC_PLLSAI1_IsReady() != 0U)
      {
        rng_frequency = RCC_PLLSAI1_GetFreqDomain_48M();
      }
      break;
#endif /* RCC_PLLSAI1_SUPPORT */

    case LL_RCC_RNG_CLKSOURCE_PLL:           /* PLL clock used as RNG clock source */
      if (LL_RCC_PLL_IsReady() != 0U)
      {
        rng_frequency = RCC_PLL_GetFreqDomain_48M();
      }
      break;

    case LL_RCC_RNG_CLKSOURCE_MSI:           /* MSI clock used as RNG clock source */
      if (LL_RCC_MSI_IsReady() != 0U)
      {
        rng_frequency = __LL_RCC_CALC_MSI_FREQ(LL_RCC_MSI_IsEnabledRangeSelect(),
                                    ((LL_RCC_MSI_IsEnabledRangeSelect() != 0U) ?
                                     LL_RCC_MSI_GetRange() :
                                     LL_RCC_MSI_GetRangeAfterStandby()));
      }
      break;


#if defined(RCC_HSI48_SUPPORT)
    case LL_RCC_RNG_CLKSOURCE_HSI48:      /* HSI48 used as RNG clock source */
      if (LL_RCC_HSI48_IsReady() != 0U)
      {
        rng_frequency = HSI48_VALUE;
      }
      break;
#else
    case LL_RCC_RNG_CLKSOURCE_NONE:       /* No clock used as RNG clock source */
#endif
    default:
      rng_frequency = LL_RCC_PERIPH_FREQUENCY_NA;
      break;

  }

  return rng_frequency;
}

LL_RCC_GetSAIClockFreq()

uint32_t LL_RCC_GetSAIClockFreq

(

uint32_t

SAIxSource

)

Return SAIx clock frequency.

Parameters

SAIxSource

This parameter can be one of the following values: LL_RCC_SAI1_CLKSOURCE LL_RCC_SAI2_CLKSOURCE (*) (*) value not defined in all devices.

Return values

SAI	clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that PLL is not ready

Definition at line 847 of file stm32l4xx_ll_rcc.c.

{
  uint32_t sai_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_SAI_CLKSOURCE(SAIxSource));

  if (SAIxSource == LL_RCC_SAI1_CLKSOURCE)
  {
    /* SAI1CLK clock frequency */
    switch (LL_RCC_GetSAIClockSource(SAIxSource))
    {
      case LL_RCC_SAI1_CLKSOURCE_PLLSAI1:    /* PLLSAI1 clock used as SAI1 clock source */
        if (LL_RCC_PLLSAI1_IsReady() != 0U)
        {
          sai_frequency = RCC_PLLSAI1_GetFreqDomain_SAI();
        }
        break;

#if defined(RCC_PLLSAI2_SUPPORT)
      case LL_RCC_SAI1_CLKSOURCE_PLLSAI2:    /* PLLSAI2 clock used as SAI1 clock source */
        if (LL_RCC_PLLSAI2_IsReady() != 0U)
        {
          sai_frequency = RCC_PLLSAI2_GetFreqDomain_SAI();
        }
        break;

#endif /* RCC_PLLSAI2_SUPPORT */
      case LL_RCC_SAI1_CLKSOURCE_PLL:        /* PLL clock used as SAI1 clock source */
        if (LL_RCC_PLL_IsReady() != 0U)
        {
          sai_frequency = RCC_PLL_GetFreqDomain_SAI();
        }
        break;

      case LL_RCC_SAI1_CLKSOURCE_PIN:        /* External input clock used as SAI1 clock source */
        sai_frequency = EXTERNAL_SAI1_CLOCK_VALUE;
        break;

      default:
        break;
    }
  }
  else
  {
#if defined(RCC_CCIPR_SAI2SEL) || defined(RCC_CCIPR2_SAI2SEL)
    if (SAIxSource == LL_RCC_SAI2_CLKSOURCE)
    {
      /* SAI2CLK clock frequency */
      switch (LL_RCC_GetSAIClockSource(SAIxSource))
      {
        case LL_RCC_SAI2_CLKSOURCE_PLLSAI1:  /* PLLSAI1 clock used as SAI2 clock source */
          if (LL_RCC_PLLSAI1_IsReady() != 0U)
          {
            sai_frequency = RCC_PLLSAI1_GetFreqDomain_SAI();
          }
          break;

#if defined(RCC_PLLSAI2_SUPPORT)
        case LL_RCC_SAI2_CLKSOURCE_PLLSAI2:  /* PLLSAI2 clock used as SAI2 clock source */
          if (LL_RCC_PLLSAI2_IsReady() != 0U)
          {
            sai_frequency = RCC_PLLSAI2_GetFreqDomain_SAI();
          }
          break;

#endif /* RCC_PLLSAI2_SUPPORT */
        case LL_RCC_SAI2_CLKSOURCE_PLL:      /* PLL clock used as SAI2 clock source */
          if (LL_RCC_PLL_IsReady() != 0U)
          {
            sai_frequency = RCC_PLL_GetFreqDomain_SAI();
          }
          break;

      case LL_RCC_SAI2_CLKSOURCE_PIN:        /* External input clock used as SAI2 clock source */
        sai_frequency = EXTERNAL_SAI2_CLOCK_VALUE;
        break;

      default:
        break;
      }
    }
#endif /* RCC_CCIPR_SAI2SEL || RCC_CCIPR2_SAI2SEL */
  }

  return sai_frequency;
}

LL_RCC_GetSDMMCClockFreq()

uint32_t LL_RCC_GetSDMMCClockFreq

(

uint32_t

SDMMCxSource

)

Return SDMMCx clock frequency.

Parameters

SDMMCxSource

This parameter can be one of the following values: LL_RCC_SDMMC1_CLKSOURCE

Return values

SDMMC

clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (MSI) or PLL is not ready LL_RCC_PERIPH_FREQUENCY_NA indicates that no clock source selected

Definition at line 984 of file stm32l4xx_ll_rcc.c.

{
  uint32_t sdmmc_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_SDMMC_CLKSOURCE(SDMMCxSource));

  /* SDMMC1CLK clock frequency */
  switch (LL_RCC_GetSDMMCClockSource(SDMMCxSource))
  {
#if  defined(LL_RCC_SDMMC1_CLKSOURCE_PLLSAI1)
    case LL_RCC_SDMMC1_CLKSOURCE_PLLSAI1:    /* PLLSAI1 clock used as SDMMC1 clock source */
      if (LL_RCC_PLLSAI1_IsReady() != 0U)
      {
        sdmmc_frequency = RCC_PLLSAI1_GetFreqDomain_48M();
      }
      break;
#endif

    case LL_RCC_SDMMC1_CLKSOURCE_PLL:        /* PLL clock used as SDMMC1 clock source */
      if (LL_RCC_PLL_IsReady() != 0U)
      {
        sdmmc_frequency = RCC_PLL_GetFreqDomain_48M();
      }
      break;

#if  defined(LL_RCC_SDMMC1_CLKSOURCE_MSI)
    case LL_RCC_SDMMC1_CLKSOURCE_MSI:        /* MSI clock used as SDMMC1 clock source */
      if (LL_RCC_MSI_IsReady() != 0U)
      {
        sdmmc_frequency = __LL_RCC_CALC_MSI_FREQ(LL_RCC_MSI_IsEnabledRangeSelect(),
                                    ((LL_RCC_MSI_IsEnabledRangeSelect() != 0U) ?
                                     LL_RCC_MSI_GetRange() :
                                     LL_RCC_MSI_GetRangeAfterStandby()));
      }
      break;
#endif

#if defined(RCC_HSI48_SUPPORT)
    case LL_RCC_SDMMC1_CLKSOURCE_HSI48:      /* HSI48 used as SDMMC1 clock source */
      if (LL_RCC_HSI48_IsReady() != 0U)
      {
        sdmmc_frequency = HSI48_VALUE;
      }
      break;
#else
    case LL_RCC_SDMMC1_CLKSOURCE_NONE:       /* No clock used as SDMMC1 clock source */
#endif
    default:
      sdmmc_frequency = LL_RCC_PERIPH_FREQUENCY_NA;
      break;
  }

  return sdmmc_frequency;
}

LL_RCC_GetSDMMCKernelClockFreq()

uint32_t LL_RCC_GetSDMMCKernelClockFreq

(

uint32_t

SDMMCxSource

)

Return SDMMCx kernel clock frequency.

Parameters

SDMMCxSource

This parameter can be one of the following values: LL_RCC_SDMMC1_KERNELCLKSOURCE

Return values

SDMMC

clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (MSI) or PLL is not ready LL_RCC_PERIPH_FREQUENCY_NA indicates that no clock source selected

Definition at line 946 of file stm32l4xx_ll_rcc.c.

{
  uint32_t sdmmc_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_SDMMC_KERNELCLKSOURCE(SDMMCxSource));

  /* SDMMC1CLK kernel clock frequency */
  switch (LL_RCC_GetSDMMCKernelClockSource(SDMMCxSource))
  {
    case LL_RCC_SDMMC1_KERNELCLKSOURCE_48CLK:      /* 48MHz clock from internal multiplexor used as SDMMC1 clock source */
      sdmmc_frequency = LL_RCC_GetSDMMCClockFreq(LL_RCC_SDMMC1_CLKSOURCE);
      break;

    case LL_RCC_SDMMC1_KERNELCLKSOURCE_PLLP:        /* PLL "P" output (PLLSAI3CLK) clock used as SDMMC1 clock source */
      if (LL_RCC_PLL_IsReady() != 0U)
      {
        sdmmc_frequency = RCC_PLL_GetFreqDomain_SAI();
      }
      break;

    default:
      sdmmc_frequency = LL_RCC_PERIPH_FREQUENCY_NA;
      break;
  }

  return sdmmc_frequency;
}

LL_RCC_GetSWPMIClockFreq()

uint32_t LL_RCC_GetSWPMIClockFreq

(

uint32_t

SWPMIxSource

)

Return SWPMIx clock frequency.

Parameters

SWPMIxSource

This parameter can be one of the following values: LL_RCC_SWPMI1_CLKSOURCE

Return values

SWPMI

clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI) is not ready

Definition at line 1227 of file stm32l4xx_ll_rcc.c.

{
  uint32_t swpmi_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_SWPMI_CLKSOURCE(SWPMIxSource));

  /* SWPMI1CLK clock frequency */
  switch (LL_RCC_GetSWPMIClockSource(SWPMIxSource))
  {
    case LL_RCC_SWPMI1_CLKSOURCE_HSI:        /* SWPMI1 Clock is HSI Osc. */
      if (LL_RCC_HSI_IsReady())
      {
        swpmi_frequency = HSI_VALUE;
      }
      break;

    case LL_RCC_SWPMI1_CLKSOURCE_PCLK1:      /* SWPMI1 Clock is PCLK1 */
      swpmi_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
      break;

    default:
      break;
  }

  return swpmi_frequency;
}

LL_RCC_GetSystemClocksFreq()

void LL_RCC_GetSystemClocksFreq

(

LL_RCC_ClocksTypeDef *

RCC_Clocks

)

Return the frequencies of different on chip clocks; System, AHB, APB1 and APB2 buses clocks.

Note

Each time SYSCLK, HCLK, PCLK1 and/or PCLK2 clock changes, this function must be called to update structure fields. Otherwise, any configuration based on this function will be incorrect.

Parameters

RCC_Clocks

pointer to a LL_RCC_ClocksTypeDef structure which will hold the clocks frequencies

Return values

None

Definition at line 329 of file stm32l4xx_ll_rcc.c.

{
  /* Get SYSCLK frequency */
  RCC_Clocks->SYSCLK_Frequency = RCC_GetSystemClockFreq();

  /* HCLK clock frequency */
  RCC_Clocks->HCLK_Frequency   = RCC_GetHCLKClockFreq(RCC_Clocks->SYSCLK_Frequency);

  /* PCLK1 clock frequency */
  RCC_Clocks->PCLK1_Frequency  = RCC_GetPCLK1ClockFreq(RCC_Clocks->HCLK_Frequency);

  /* PCLK2 clock frequency */
  RCC_Clocks->PCLK2_Frequency  = RCC_GetPCLK2ClockFreq(RCC_Clocks->HCLK_Frequency);
}

LL_RCC_GetUARTClockFreq()

uint32_t LL_RCC_GetUARTClockFreq

(

uint32_t

UARTxSource

)

Return UARTx clock frequency.

Parameters

UARTxSource

This parameter can be one of the following values: LL_RCC_UART4_CLKSOURCE LL_RCC_UART5_CLKSOURCE

Return values

UART	clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI or LSE) is not ready

Definition at line 472 of file stm32l4xx_ll_rcc.c.

{
  uint32_t uart_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_UART_CLKSOURCE(UARTxSource));

#if defined(RCC_CCIPR_UART4SEL)
  if (UARTxSource == LL_RCC_UART4_CLKSOURCE)
  {
    /* UART4CLK clock frequency */
    switch (LL_RCC_GetUARTClockSource(UARTxSource))
    {
      case LL_RCC_UART4_CLKSOURCE_SYSCLK: /* UART4 Clock is System Clock */
        uart_frequency = RCC_GetSystemClockFreq();
        break;

      case LL_RCC_UART4_CLKSOURCE_HSI:    /* UART4 Clock is HSI Osc. */
        if (LL_RCC_HSI_IsReady() != 0U)
        {
          uart_frequency = HSI_VALUE;
        }
        break;

      case LL_RCC_UART4_CLKSOURCE_LSE:    /* UART4 Clock is LSE Osc. */
        if (LL_RCC_LSE_IsReady() != 0U)
        {
          uart_frequency = LSE_VALUE;
        }
        break;

      case LL_RCC_UART4_CLKSOURCE_PCLK1:  /* UART4 Clock is PCLK1 */
        uart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
        break;

      default:
        break;
    }
  }
#endif /* RCC_CCIPR_UART4SEL */

#if defined(RCC_CCIPR_UART5SEL)
  if (UARTxSource == LL_RCC_UART5_CLKSOURCE)
  {
    /* UART5CLK clock frequency */
    switch (LL_RCC_GetUARTClockSource(UARTxSource))
    {
      case LL_RCC_UART5_CLKSOURCE_SYSCLK: /* UART5 Clock is System Clock */
        uart_frequency = RCC_GetSystemClockFreq();
        break;

      case LL_RCC_UART5_CLKSOURCE_HSI:    /* UART5 Clock is HSI Osc. */
        if (LL_RCC_HSI_IsReady() != 0U)
        {
          uart_frequency = HSI_VALUE;
        }
        break;

      case LL_RCC_UART5_CLKSOURCE_LSE:    /* UART5 Clock is LSE Osc. */
        if (LL_RCC_LSE_IsReady() != 0U)
        {
          uart_frequency = LSE_VALUE;
        }
        break;

      case LL_RCC_UART5_CLKSOURCE_PCLK1:  /* UART5 Clock is PCLK1 */
        uart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
        break;

      default:
        break;
    }
  }
#endif /* RCC_CCIPR_UART5SEL */

  return uart_frequency;
}

LL_RCC_GetUSARTClockFreq()

uint32_t LL_RCC_GetUSARTClockFreq

(

uint32_t

USARTxSource

)

Return USARTx clock frequency.

Parameters

USARTxSource

This parameter can be one of the following values: LL_RCC_USART1_CLKSOURCE LL_RCC_USART2_CLKSOURCE LL_RCC_USART3_CLKSOURCE (*) (*) value not defined in all devices.

Return values

USART

clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI or LSE) is not ready

Definition at line 355 of file stm32l4xx_ll_rcc.c.

{
  uint32_t usart_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_USART_CLKSOURCE(USARTxSource));

  if (USARTxSource == LL_RCC_USART1_CLKSOURCE)
  {
    /* USART1CLK clock frequency */
    switch (LL_RCC_GetUSARTClockSource(USARTxSource))
    {
      case LL_RCC_USART1_CLKSOURCE_SYSCLK: /* USART1 Clock is System Clock */
        usart_frequency = RCC_GetSystemClockFreq();
        break;

      case LL_RCC_USART1_CLKSOURCE_HSI:    /* USART1 Clock is HSI Osc. */
        if (LL_RCC_HSI_IsReady() != 0U)
        {
          usart_frequency = HSI_VALUE;
        }
        break;

      case LL_RCC_USART1_CLKSOURCE_LSE:    /* USART1 Clock is LSE Osc. */
        if (LL_RCC_LSE_IsReady() != 0U)
        {
          usart_frequency = LSE_VALUE;
        }
        break;

      case LL_RCC_USART1_CLKSOURCE_PCLK2:  /* USART1 Clock is PCLK2 */
        usart_frequency = RCC_GetPCLK2ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
        break;

      default:
        break;
    }
  }
  else if (USARTxSource == LL_RCC_USART2_CLKSOURCE)
  {
    /* USART2CLK clock frequency */
    switch (LL_RCC_GetUSARTClockSource(USARTxSource))
    {
      case LL_RCC_USART2_CLKSOURCE_SYSCLK: /* USART2 Clock is System Clock */
        usart_frequency = RCC_GetSystemClockFreq();
        break;

      case LL_RCC_USART2_CLKSOURCE_HSI:    /* USART2 Clock is HSI Osc. */
        if (LL_RCC_HSI_IsReady() != 0U)
        {
          usart_frequency = HSI_VALUE;
        }
        break;

      case LL_RCC_USART2_CLKSOURCE_LSE:    /* USART2 Clock is LSE Osc. */
        if (LL_RCC_LSE_IsReady() != 0U)
        {
          usart_frequency = LSE_VALUE;
        }
        break;

      case LL_RCC_USART2_CLKSOURCE_PCLK1:  /* USART2 Clock is PCLK1 */
        usart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
        break;

      default:
        break;
    }
  }
  else
  {
#if defined(RCC_CCIPR_USART3SEL)
    if (USARTxSource == LL_RCC_USART3_CLKSOURCE)
    {
      /* USART3CLK clock frequency */
      switch (LL_RCC_GetUSARTClockSource(USARTxSource))
      {
        case LL_RCC_USART3_CLKSOURCE_SYSCLK: /* USART3 Clock is System Clock */
          usart_frequency = RCC_GetSystemClockFreq();
          break;

        case LL_RCC_USART3_CLKSOURCE_HSI:    /* USART3 Clock is HSI Osc. */
          if (LL_RCC_HSI_IsReady() != 0U)
          {
            usart_frequency = HSI_VALUE;
          }
          break;

        case LL_RCC_USART3_CLKSOURCE_LSE:    /* USART3 Clock is LSE Osc. */
          if (LL_RCC_LSE_IsReady() != 0U)
          {
            usart_frequency = LSE_VALUE;
          }
          break;

        case LL_RCC_USART3_CLKSOURCE_PCLK1:  /* USART3 Clock is PCLK1 */
          usart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
          break;

        default:
          break;
      }
    }
#endif /* RCC_CCIPR_USART3SEL */
  }
  return usart_frequency;
}

LL_RCC_GetUSBClockFreq()

uint32_t LL_RCC_GetUSBClockFreq

(

uint32_t

USBxSource

)

Return USBx clock frequency.

Parameters

USBxSource

This parameter can be one of the following values: LL_RCC_USB_CLKSOURCE

Return values

USB	clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (MSI) or PLL is not ready LL_RCC_PERIPH_FREQUENCY_NA indicates that no clock source selected

Definition at line 1115 of file stm32l4xx_ll_rcc.c.

{
  uint32_t usb_frequency = LL_RCC_PERIPH_FREQUENCY_NO;

  /* Check parameter */
  assert_param(IS_LL_RCC_USB_CLKSOURCE(USBxSource));

  /* USBCLK clock frequency */
  switch (LL_RCC_GetUSBClockSource(USBxSource))
  {
#if defined(RCC_PLLSAI1_SUPPORT)
    case LL_RCC_USB_CLKSOURCE_PLLSAI1:       /* PLLSAI1 clock used as USB clock source */
      if (LL_RCC_PLLSAI1_IsReady() != 0U)
      {
        usb_frequency = RCC_PLLSAI1_GetFreqDomain_48M();
      }
      break;
#endif /* RCC_PLLSAI1_SUPPORT */

    case LL_RCC_USB_CLKSOURCE_PLL:           /* PLL clock used as USB clock source */
      if (LL_RCC_PLL_IsReady() != 0U)
      {
        usb_frequency = RCC_PLL_GetFreqDomain_48M();
      }
      break;

    case LL_RCC_USB_CLKSOURCE_MSI:           /* MSI clock used as USB clock source */
      if (LL_RCC_MSI_IsReady() != 0U)
      {
        usb_frequency = __LL_RCC_CALC_MSI_FREQ(LL_RCC_MSI_IsEnabledRangeSelect(),
                                    ((LL_RCC_MSI_IsEnabledRangeSelect() != 0U) ?
                                     LL_RCC_MSI_GetRange() :
                                     LL_RCC_MSI_GetRangeAfterStandby()));
      }
      break;

#if defined(RCC_HSI48_SUPPORT)
    case LL_RCC_USB_CLKSOURCE_HSI48:      /* HSI48 used as USB clock source */
      if (LL_RCC_HSI48_IsReady() != 0U)
      {
        usb_frequency = HSI48_VALUE;
      }
      break;
#else
    case LL_RCC_USB_CLKSOURCE_NONE:       /* No clock used as USB clock source */
#endif
    default:
      usb_frequency = LL_RCC_PERIPH_FREQUENCY_NA;
      break;
  }

  return usb_frequency;
}