Get Clock source

Macros
#define	__HAL_RCC_SYSCLK_CONFIG(__RCC_SYSCLKSOURCE__)   MODIFY_REG(RCC->CFGR, RCC_CFGR_SW, (__RCC_SYSCLKSOURCE__))
	Macro to configure the system clock source. More...
#define	__HAL_RCC_GET_SYSCLK_SOURCE()   ((uint32_t)(RCC->CFGR & RCC_CFGR_SWS))
	Macro to get the clock source used as system clock. More...
#define	__HAL_RCC_LSEDRIVE_CONFIG(__RCC_LSEDRIVE__)   (MODIFY_REG(RCC->BDCR, RCC_BDCR_LSEDRV, (uint32_t)(__RCC_LSEDRIVE__) ))
	Macro to configures the External Low Speed oscillator (LSE) drive capability. More...
#define	__HAL_RCC_GET_PLL_OSCSOURCE()   ((uint32_t)(RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC))
	Macro to get the oscillator used as PLL clock source. More...

Detailed Description

Macro Definition Documentation

#define __HAL_RCC_GET_PLL_OSCSOURCE

(

)

((uint32_t)(RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC))

Macro to get the oscillator used as PLL clock source.

Return values

The	oscillator used as PLL clock source. The returned value can be one of the following: RCC_PLLSOURCE_HSI: HSI oscillator is used as PLL clock source. RCC_PLLSOURCE_HSE: HSE oscillator is used as PLL clock source.

Definition at line 980 of file stm32f7xx_hal_rcc.h.

#define __HAL_RCC_GET_SYSCLK_SOURCE

(

)

((uint32_t)(RCC->CFGR & RCC_CFGR_SWS))

Macro to get the clock source used as system clock.

Return values

The	clock source used as system clock. The returned value can be one of the following: RCC_SYSCLKSOURCE_STATUS_HSI: HSI used as system clock. RCC_SYSCLKSOURCE_STATUS_HSE: HSE used as system clock. RCC_SYSCLKSOURCE_STATUS_PLLCLK: PLL used as system clock.

Definition at line 955 of file stm32f7xx_hal_rcc.h.

#define __HAL_RCC_LSEDRIVE_CONFIG

(

__RCC_LSEDRIVE__

)

(MODIFY_REG(RCC->BDCR, RCC_BDCR_LSEDRV, (uint32_t)(__RCC_LSEDRIVE__) ))

Macro to configures the External Low Speed oscillator (LSE) drive capability.

Note

As the LSE is in the Backup domain and write access is denied to this domain after reset, you have to enable write access using HAL_PWR_EnableBkUpAccess() function before to configure the LSE (to be done once after reset).

Parameters

<strong>RCC_LSEDRIVE</strong>

specifies the new state of the LSE drive capability. This parameter can be one of the following values: RCC_LSEDRIVE_LOW: LSE oscillator low drive capability. RCC_LSEDRIVE_MEDIUMLOW: LSE oscillator medium low drive capability. RCC_LSEDRIVE_MEDIUMHIGH: LSE oscillator medium high drive capability. RCC_LSEDRIVE_HIGH: LSE oscillator high drive capability.

Return values

None

Definition at line 971 of file stm32f7xx_hal_rcc.h.

#define __HAL_RCC_SYSCLK_CONFIG

(

__RCC_SYSCLKSOURCE__

)

MODIFY_REG(RCC->CFGR, RCC_CFGR_SW, (__RCC_SYSCLKSOURCE__))

Macro to configure the system clock source.

Parameters

<strong>RCC_SYSCLKSOURCE</strong>

specifies the system clock source. This parameter can be one of the following values: RCC_SYSCLKSOURCE_HSI: HSI oscillator is used as system clock source. RCC_SYSCLKSOURCE_HSE: HSE oscillator is used as system clock source. RCC_SYSCLKSOURCE_PLLCLK: PLL output is used as system clock source.

Definition at line 946 of file stm32f7xx_hal_rcc.h.