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

Collaboration diagram for Get system and peripherals clocks frequency functions:

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_GetFMPI2CClockFreq (uint32_t FMPI2CxSource)
	Return FMPI2Cx 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_GetSDIOClockFreq (uint32_t SDIOxSource)
	Return SDIOx 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_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_GetI2SClockFreq (uint32_t I2SxSource)
	Return I2Sx clock frequency. More...

uint32_t	LL_RCC_GetCECClockFreq (uint32_t CECxSource)
	Return CEC clock frequency. More...

uint32_t	LL_RCC_GetLTDCClockFreq (uint32_t LTDCxSource)
	Return LTDC clock frequency. More...

uint32_t	LL_RCC_GetSPDIFRXClockFreq (uint32_t SPDIFRXxSource)
	Return SPDIFRX clock frequency. More...

uint32_t	LL_RCC_GetDSIClockFreq (uint32_t DSIxSource)
	Return DSI 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 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(**) multiplied/divided by the PLL factors.; (**) 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 25 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_GetCECClockFreq()

uint32_t LL_RCC_GetCECClockFreq ( uint32_t CECxSource )

Return CEC clock frequency.

Parameters

CECxSource

This parameter can be one of the following values:

LL_RCC_CEC_CLKSOURCE

Return values

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

Definition at line 810 of file stm32f4xx_ll_rcc.c.

◆ 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
LL_RCC_DFSDM2_AUDIO_CLKSOURCE (*)

(*) value not defined in all devices.

Return values

DFSDM

clock frequency (in Hz)

LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator is not ready

Definition at line 961 of file stm32f4xx_ll_rcc.c.

◆ 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
LL_RCC_DFSDM2_CLKSOURCE (*)

(*) value not defined in all devices.

Return values

DFSDM clock frequency (in Hz)

Definition at line 908 of file stm32f4xx_ll_rcc.c.

◆ 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 1014 of file stm32f4xx_ll_rcc.c.

◆ LL_RCC_GetFMPI2CClockFreq()

uint32_t LL_RCC_GetFMPI2CClockFreq ( uint32_t FMPI2CxSource )

Return FMPI2Cx clock frequency.

Parameters

FMPI2CxSource

This parameter can be one of the following values:

LL_RCC_FMPI2C1_CLKSOURCE

Return values

FMPI2C

clock frequency (in Hz)

LL_RCC_PERIPH_FREQUENCY_NO indicates that HSI oscillator is not ready

Definition at line 326 of file stm32f4xx_ll_rcc.c.

◆ LL_RCC_GetI2SClockFreq()

uint32_t LL_RCC_GetI2SClockFreq ( uint32_t I2SxSource )

Return I2Sx clock frequency.

Parameters

I2SxSource

This parameter can be one of the following values:

LL_RCC_I2S1_CLKSOURCE
LL_RCC_I2S2_CLKSOURCE (*)

(*) value not defined in all devices.

Return values

I2S	clock frequency (in Hz) LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator is not ready

Definition at line 370 of file stm32f4xx_ll_rcc.c.

◆ 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

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 485 of file stm32f4xx_ll_rcc.c.

◆ 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 1049 of file stm32f4xx_ll_rcc.c.

◆ 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 is not ready

Definition at line 753 of file stm32f4xx_ll_rcc.c.

◆ 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 (*)
LL_RCC_SAI1_A_CLKSOURCE (*)
LL_RCC_SAI1_B_CLKSOURCE (*)

(*) value not defined in all devices.

Return values

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

Definition at line 542 of file stm32f4xx_ll_rcc.c.

◆ LL_RCC_GetSDIOClockFreq()

uint32_t LL_RCC_GetSDIOClockFreq ( uint32_t SDIOxSource )

Return SDIOx clock frequency.

Parameters

SDIOxSource

This parameter can be one of the following values:

LL_RCC_SDIO_CLKSOURCE

Return values

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

Definition at line 682 of file stm32f4xx_ll_rcc.c.

◆ LL_RCC_GetSPDIFRXClockFreq()

uint32_t LL_RCC_GetSPDIFRXClockFreq ( uint32_t SPDIFRXxSource )

Return SPDIFRX clock frequency.

Parameters

SPDIFRXxSource

This parameter can be one of the following values:

LL_RCC_SPDIFRX1_CLKSOURCE

Return values

SPDIFRX

clock frequency (in Hz)

LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator is not ready

Definition at line 1073 of file stm32f4xx_ll_rcc.c.

◆ 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 303 of file stm32f4xx_ll_rcc.c.

◆ 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 is not ready

Definition at line 848 of file stm32f4xx_ll_rcc.c.

Functions

Detailed Description

Function Documentation

◆ LL_RCC_GetCECClockFreq()

◆ LL_RCC_GetDFSDMAudioClockFreq()

◆ LL_RCC_GetDFSDMClockFreq()

◆ LL_RCC_GetDSIClockFreq()

◆ LL_RCC_GetFMPI2CClockFreq()

◆ LL_RCC_GetI2SClockFreq()

◆ LL_RCC_GetLPTIMClockFreq()

◆ LL_RCC_GetLTDCClockFreq()

◆ LL_RCC_GetRNGClockFreq()

◆ LL_RCC_GetSAIClockFreq()

◆ LL_RCC_GetSDIOClockFreq()

◆ LL_RCC_GetSPDIFRXClockFreq()

◆ LL_RCC_GetSystemClocksFreq()

◆ LL_RCC_GetUSBClockFreq()