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.
uint32_t	LL_RCC_GetUSARTClockFreq (uint32_t USARTxSource)
	Return USARTx clock frequency.
uint32_t	LL_RCC_GetI2CClockFreq (uint32_t I2CxSource)
	Return I2Cx clock frequency.
uint32_t	LL_RCC_GetLPUARTClockFreq (uint32_t LPUARTxSource)
	Return LPUARTx clock frequency.
uint32_t	LL_RCC_GetLPTIMClockFreq (uint32_t LPTIMxSource)
	Return LPTIMx clock frequency.
uint32_t	LL_RCC_GetSAIClockFreq (uint32_t SAIxSource)
	Return SAIx clock frequency.
uint32_t	LL_RCC_GetSDMMCClockFreq (uint32_t SDMMCxSource)
	Return SDMMCx clock frequency.
uint32_t	LL_RCC_GetRNGClockFreq (uint32_t RNGxSource)
	Return RNGx clock frequency.
uint32_t	LL_RCC_GetUSBClockFreq (uint32_t USBxSource)
	Return USBx clock frequency.
uint32_t	LL_RCC_GetADCClockFreq (uint32_t ADCxSource)
	Return ADCx clock frequency.
uint32_t	LL_RCC_GetSWPMIClockFreq (uint32_t SWPMIxSource)
	Return SWPMIx clock frequency.

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

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 1221 of file stm32l4xx_ll_rcc.c.

References assert_param, IS_LL_RCC_ADC_CLKSOURCE, LL_RCC_ADC_CLKSOURCE_NONE, LL_RCC_ADC_CLKSOURCE_PLLSAI1, LL_RCC_ADC_CLKSOURCE_SYSCLK, LL_RCC_GetADCClockSource(), LL_RCC_PERIPH_FREQUENCY_NA, LL_RCC_PERIPH_FREQUENCY_NO, LL_RCC_PLLSAI1_IsEnabledDomain_ADC(), LL_RCC_PLLSAI1_IsReady(), RCC_GetSystemClockFreq(), and RCC_PLLSAI1_GetFreqDomain_ADC().

uint32_t LL_RCC_GetI2CClockFreq ( uint32_t I2CxSource )

Return I2Cx clock frequency.

Parameters:

I2CxSource

This parameter can be one of the following values:

(*) 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 567 of file stm32l4xx_ll_rcc.c.

References assert_param, HSI_VALUE, IS_LL_RCC_I2C_CLKSOURCE, LL_RCC_GetI2CClockSource(), LL_RCC_HSI_IsReady(), LL_RCC_I2C1_CLKSOURCE, LL_RCC_I2C1_CLKSOURCE_HSI, LL_RCC_I2C1_CLKSOURCE_PCLK1, LL_RCC_I2C1_CLKSOURCE_SYSCLK, LL_RCC_I2C2_CLKSOURCE, LL_RCC_I2C2_CLKSOURCE_HSI, LL_RCC_I2C2_CLKSOURCE_PCLK1, LL_RCC_I2C2_CLKSOURCE_SYSCLK, LL_RCC_I2C3_CLKSOURCE, LL_RCC_I2C3_CLKSOURCE_HSI, LL_RCC_I2C3_CLKSOURCE_PCLK1, LL_RCC_I2C3_CLKSOURCE_SYSCLK, LL_RCC_PERIPH_FREQUENCY_NO, RCC_GetHCLKClockFreq(), RCC_GetPCLK1ClockFreq(), and RCC_GetSystemClockFreq().

uint32_t LL_RCC_GetLPTIMClockFreq ( uint32_t LPTIMxSource )

Return LPTIMx clock frequency.

Parameters:

LPTIMxSource

This parameter can be one of the following values:

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 739 of file stm32l4xx_ll_rcc.c.

References assert_param, HSI_VALUE, IS_LL_RCC_LPTIM_CLKSOURCE, LL_RCC_GetLPTIMClockSource(), LL_RCC_HSI_IsReady(), LL_RCC_LPTIM1_CLKSOURCE, LL_RCC_LPTIM1_CLKSOURCE_HSI, LL_RCC_LPTIM1_CLKSOURCE_LSE, LL_RCC_LPTIM1_CLKSOURCE_LSI, LL_RCC_LPTIM1_CLKSOURCE_PCLK1, LL_RCC_LPTIM2_CLKSOURCE, LL_RCC_LPTIM2_CLKSOURCE_HSI, LL_RCC_LPTIM2_CLKSOURCE_LSE, LL_RCC_LPTIM2_CLKSOURCE_LSI, LL_RCC_LPTIM2_CLKSOURCE_PCLK1, LL_RCC_LSE_IsReady(), LL_RCC_LSI_IsReady(), LL_RCC_PERIPH_FREQUENCY_NO, LSE_VALUE, LSI_VALUE, RCC_GetHCLKClockFreq(), RCC_GetPCLK1ClockFreq(), and RCC_GetSystemClockFreq().

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 692 of file stm32l4xx_ll_rcc.c.

References assert_param, HSI_VALUE, IS_LL_RCC_LPUART_CLKSOURCE, LL_RCC_GetLPUARTClockSource(), LL_RCC_HSI_IsReady(), LL_RCC_LPUART1_CLKSOURCE_HSI, LL_RCC_LPUART1_CLKSOURCE_LSE, LL_RCC_LPUART1_CLKSOURCE_PCLK1, LL_RCC_LPUART1_CLKSOURCE_SYSCLK, LL_RCC_LSE_IsReady(), LL_RCC_PERIPH_FREQUENCY_NO, LSE_VALUE, RCC_GetHCLKClockFreq(), RCC_GetPCLK1ClockFreq(), and RCC_GetSystemClockFreq().

Referenced by LL_LPUART_Init().

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 1080 of file stm32l4xx_ll_rcc.c.

References __LL_RCC_CALC_MSI_FREQ, assert_param, HSI48_VALUE, IS_LL_RCC_RNG_CLKSOURCE, LL_RCC_GetRNGClockSource(), LL_RCC_HSI48_IsReady(), LL_RCC_MSI_GetRange(), LL_RCC_MSI_GetRangeAfterStandby(), LL_RCC_MSI_IsEnabledRangeSelect(), LL_RCC_MSI_IsReady(), LL_RCC_PERIPH_FREQUENCY_NA, LL_RCC_PERIPH_FREQUENCY_NO, LL_RCC_PLL_IsEnabledDomain_48M(), LL_RCC_PLL_IsReady(), LL_RCC_PLLSAI1_IsEnabledDomain_48M(), LL_RCC_PLLSAI1_IsReady(), LL_RCC_RNG_CLKSOURCE_HSI48, LL_RCC_RNG_CLKSOURCE_MSI, LL_RCC_RNG_CLKSOURCE_PLL, LL_RCC_RNG_CLKSOURCE_PLLSAI1, RCC_PLL_GetFreqDomain_48M(), and RCC_PLLSAI1_GetFreqDomain_48M().

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 851 of file stm32l4xx_ll_rcc.c.

References assert_param, EXTERNAL_SAI1_CLOCK_VALUE, EXTERNAL_SAI2_CLOCK_VALUE, IS_LL_RCC_SAI_CLKSOURCE, LL_RCC_GetSAIClockSource(), LL_RCC_PERIPH_FREQUENCY_NO, LL_RCC_PLL_IsEnabledDomain_SAI(), LL_RCC_PLL_IsReady(), LL_RCC_PLLSAI1_IsEnabledDomain_SAI(), LL_RCC_PLLSAI1_IsReady(), LL_RCC_SAI1_CLKSOURCE, LL_RCC_SAI1_CLKSOURCE_PIN, LL_RCC_SAI1_CLKSOURCE_PLL, LL_RCC_SAI1_CLKSOURCE_PLLSAI1, RCC_PLL_GetFreqDomain_SAI(), and RCC_PLLSAI1_GetFreqDomain_SAI().

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 1009 of file stm32l4xx_ll_rcc.c.

References __LL_RCC_CALC_MSI_FREQ, assert_param, HSI48_VALUE, IS_LL_RCC_SDMMC_CLKSOURCE, LL_RCC_GetSDMMCClockSource(), LL_RCC_HSI48_IsReady(), LL_RCC_MSI_GetRange(), LL_RCC_MSI_GetRangeAfterStandby(), LL_RCC_MSI_IsEnabledRangeSelect(), LL_RCC_MSI_IsReady(), LL_RCC_PERIPH_FREQUENCY_NA, LL_RCC_PERIPH_FREQUENCY_NO, LL_RCC_PLL_IsEnabledDomain_48M(), LL_RCC_PLL_IsReady(), LL_RCC_PLLSAI1_IsEnabledDomain_48M(), LL_RCC_PLLSAI1_IsReady(), LL_RCC_SDMMC1_CLKSOURCE_HSI48, LL_RCC_SDMMC1_CLKSOURCE_MSI, LL_RCC_SDMMC1_CLKSOURCE_PLL, LL_RCC_SDMMC1_CLKSOURCE_PLLSAI1, RCC_PLL_GetFreqDomain_48M(), and RCC_PLLSAI1_GetFreqDomain_48M().

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 1276 of file stm32l4xx_ll_rcc.c.

References assert_param, HSI_VALUE, IS_LL_RCC_SWPMI_CLKSOURCE, LL_RCC_GetSWPMIClockSource(), LL_RCC_HSI_IsReady(), LL_RCC_PERIPH_FREQUENCY_NO, LL_RCC_SWPMI1_CLKSOURCE_HSI, LL_RCC_SWPMI1_CLKSOURCE_PCLK1, RCC_GetHCLKClockFreq(), RCC_GetPCLK1ClockFreq(), and RCC_GetSystemClockFreq().

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 333 of file stm32l4xx_ll_rcc.c.

References LL_RCC_ClocksTypeDef::HCLK_Frequency, LL_RCC_ClocksTypeDef::PCLK1_Frequency, LL_RCC_ClocksTypeDef::PCLK2_Frequency, RCC_GetHCLKClockFreq(), RCC_GetPCLK1ClockFreq(), RCC_GetPCLK2ClockFreq(), RCC_GetSystemClockFreq(), and LL_RCC_ClocksTypeDef::SYSCLK_Frequency.

Referenced by LL_LPTIM_Disable().

uint32_t LL_RCC_GetUSARTClockFreq ( uint32_t USARTxSource )

Return USARTx clock frequency.

Parameters:

USARTxSource

This parameter can be one of the following values:

(*) 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 359 of file stm32l4xx_ll_rcc.c.

References assert_param, HSI_VALUE, IS_LL_RCC_USART_CLKSOURCE, LL_RCC_GetUSARTClockSource(), LL_RCC_HSI_IsReady(), LL_RCC_LSE_IsReady(), LL_RCC_PERIPH_FREQUENCY_NO, LL_RCC_USART1_CLKSOURCE, LL_RCC_USART1_CLKSOURCE_HSI, LL_RCC_USART1_CLKSOURCE_LSE, LL_RCC_USART1_CLKSOURCE_PCLK2, LL_RCC_USART1_CLKSOURCE_SYSCLK, LL_RCC_USART2_CLKSOURCE, LL_RCC_USART2_CLKSOURCE_HSI, LL_RCC_USART2_CLKSOURCE_LSE, LL_RCC_USART2_CLKSOURCE_PCLK1, LL_RCC_USART2_CLKSOURCE_SYSCLK, LL_RCC_USART3_CLKSOURCE, LL_RCC_USART3_CLKSOURCE_HSI, LL_RCC_USART3_CLKSOURCE_LSE, LL_RCC_USART3_CLKSOURCE_PCLK1, LL_RCC_USART3_CLKSOURCE_SYSCLK, LSE_VALUE, RCC_GetHCLKClockFreq(), RCC_GetPCLK1ClockFreq(), RCC_GetPCLK2ClockFreq(), and RCC_GetSystemClockFreq().

Referenced by LL_USART_Init().

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 1152 of file stm32l4xx_ll_rcc.c.

References __LL_RCC_CALC_MSI_FREQ, assert_param, HSI48_VALUE, IS_LL_RCC_USB_CLKSOURCE, LL_RCC_GetUSBClockSource(), LL_RCC_HSI48_IsReady(), LL_RCC_MSI_GetRange(), LL_RCC_MSI_GetRangeAfterStandby(), LL_RCC_MSI_IsEnabledRangeSelect(), LL_RCC_MSI_IsReady(), LL_RCC_PERIPH_FREQUENCY_NA, LL_RCC_PERIPH_FREQUENCY_NO, LL_RCC_PLL_IsEnabledDomain_48M(), LL_RCC_PLL_IsReady(), LL_RCC_PLLSAI1_IsEnabledDomain_48M(), LL_RCC_PLLSAI1_IsReady(), LL_RCC_USB_CLKSOURCE_HSI48, LL_RCC_USB_CLKSOURCE_MSI, LL_RCC_USB_CLKSOURCE_PLL, LL_RCC_USB_CLKSOURCE_PLLSAI1, RCC_PLL_GetFreqDomain_48M(), and RCC_PLLSAI1_GetFreqDomain_48M().

Functions

Detailed Description

Function Documentation