HAL RCC Extension Driver		UM1725
	uint32_t RCC_PeriphCLKInitTypeDef::SdioClockSelection
	Specifies SDIO Clock Source Selection. This parameter can be a value of
	RCCEx_SDIO_Clock_Source
	uint32_t RCC_PeriphCLKInitTypeDef::CecClockSelection
	Specifies CEC Clock Source Selection. This parameter can be a value of
	RCCEx_CEC_Clock_Source
	uint32_t RCC_PeriphCLKInitTypeDef::Fmpi2c1ClockSelection
	Specifies FMPI2C1 Clock Source Selection. This parameter can be a value of
	RCCEx_FMPI2C1_Clock_Source
	uint32_t RCC_PeriphCLKInitTypeDef::SpdifClockSelection
	Specifies SPDIFRX Clock Source Selection. This parameter can be a value of
	RCCEx_SPDIFRX_Clock_Source
	uint32_t RCC_PeriphCLKInitTypeDef::Clk48ClockSelection
	Specifies CK48 Clock Selection this clock used OTG FS, SDIO and RNG clocks. This
	parameter can be a value of RCCEx_CK48_Clock_Source
	uint8_t RCC_PeriphCLKInitTypeDef::TIMPresSelection

Specifies TIM Clock Source Selection. This parameter can be a value of

RCCEx_TIM_PRescaler_Selection

46.2RCCEx Firmware driver API description

46.2.1Extended Peripheral Control functions

This subsection provides a set of functions allowing to control the RCC Clocks frequencies.

Important note: Care must be taken when HAL_RCCEx_PeriphCLKConfig() is used to select the RTC clock source; in this case the Backup domain will be reset in order to modify the RTC Clock source, as consequence RTC registers (including the backup registers) and RCC_BDCR register are set to their reset values.

This section contains the following APIs:

HAL_RCCEx_PeriphCLKConfig()

HAL_RCCEx_GetPeriphCLKConfig()

HAL_RCCEx_GetPeriphCLKFreq()

HAL_RCCEx_SelectLSEMode()

HAL_RCC_OscConfig()

HAL_RCC_GetOscConfig()

HAL_RCC_GetSysClockFreq()

46.2.2HAL_RCCEx_PeriphCLKConfig

Function Name	HAL_StatusTypeDef HAL_RCCEx_PeriphCLKConfig
	(RCC_PeriphCLKInitTypeDef * PeriphClkInit)
Function Description	Initializes the RCC extended peripherals clocks according to the
	specified parameters in the RCC_PeriphCLKInitTypeDef.
Parameters	PeriphClkInit: pointer to an RCC_PeriphCLKInitTypeDef

	structure that contains the configuration information for the
	Extended Peripherals clocks(I2S, SAI, LTDC RTC and TIM).
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Return values	HAL status
Notes	Care must be taken when HAL_RCCEx_PeriphCLKConfig() is
	used to select the RTC clock source; in this case the Backup
	domain will be reset in order to modify the RTC Clock source,
	as consequence RTC registers (including the backup
	registers) and RCC_BDCR register are set to their reset
	values.

46.2.3HAL_RCCEx_GetPeriphCLKConfig

Function Name	void HAL_RCCEx_GetPeriphCLKConfig
	(RCC_PeriphCLKInitTypeDef * PeriphClkInit)
Function Description	Get the RCC_PeriphCLKInitTypeDef according to the internal RCC
	configuration registers.
Parameters		PeriphClkInit: pointer to an RCC_PeriphCLKInitTypeDef
		structure that will be configured.
Return values		None

46.2.4HAL_RCCEx_GetPeriphCLKFreq

Function Name	uint32_t HAL_RCCEx_GetPeriphCLKFreq (uint32_t PeriphClk)
Function Description	Return the peripheral clock frequency for a given peripheral(SAI..)
Parameters		PeriphClk: Peripheral clock identifier This parameter can be
		one of the following values: RCC_PERIPHCLK_SAI1: SAI1
		peripheral clockRCC_PERIPHCLK_SAI2: SAI2 peripheral
		clock
Return values		Frequency in KHz
Notes	Return 0 if peripheral clock identifier not managed by this API

46.2.5HAL_RCCEx_SelectLSEMode

Function Name	void HAL_RCCEx_SelectLSEMode (uint8_t Mode)
Function Description	Select LSE mode.
Parameters		Mode: specifies the LSE mode. This parameter can be one
		of the following values: RCC_LSE_LOWPOWER_MODE:
		LSE oscillator in low power mode
		selectionRCC_LSE_HIGHDRIVE_MODE: LSE oscillator in
		High Drive mode selection
Return values		None
Notes	This mode is only available for STM32F411xx devices.

46.2.6HAL_RCC_OscConfig

Function Name	HAL_StatusTypeDef HAL_RCC_OscConfig
	(RCC_OscInitTypeDef * RCC_OscInitStruct)
Function Description	Initializes the RCC Oscillators according to the specified
	parameters in the RCC_OscInitTypeDef.
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Parameters		RCC_OscInitStruct: pointer to an RCC_OscInitTypeDef
		structure that contains the configuration information for the
		RCC Oscillators.
Return values		HAL status
Notes	The PLL is not disabled when used as system clock.

46.2.7HAL_RCC_GetOscConfig

Function Name	void HAL_RCC_GetOscConfig (RCC_OscInitTypeDef *
	RCC_OscInitStruct)
Function Description	Configures the RCC_OscInitStruct according to the internal RCC
	configuration registers.
Parameters		RCC_OscInitStruct: pointer to an RCC_OscInitTypeDef
		structure that will be configured.
Return values		None

46.2.8HAL_RCC_GetSysClockFreq

Function Name	uint32_t HAL_RCC_GetSysClockFreq (void )
Function Description	Returns the SYSCLK frequency.
Return values		SYSCLK frequency
Notes		The system frequency computed by this function is not the
		real frequency in the chip. It is calculated based on the
		predefined constant and the selected clock source:
		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 stm32f4xx_hal_conf.h
		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
		stm32f4xx_hal_conf.h 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 not correct when using
		fractional value for HSE crystal.
		This function can be used by the user application to compute
		the baudrate for the communication peripherals or configure
		other parameters.
		Each time SYSCLK changes, this function must be called to
		update the right SYSCLK value. Otherwise, any configuration
		based on this function will be incorrect.

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