Get Clock source

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Macros
#define	__HAL_RCC_SYSCLK_CONFIG(__SYSCLKSOURCE__)    MODIFY_REG(RCC->CFGR, RCC_CFGR_SW, (__SYSCLKSOURCE__))
	Macro to configure the system clock source.
#define	__HAL_RCC_GET_SYSCLK_SOURCE()   ((uint32_t)(READ_BIT(RCC->CFGR,RCC_CFGR_SWS)))
	Macro to get the clock source used as system clock.

Detailed Description

Macro Definition Documentation

__HAL_RCC_GET_SYSCLK_SOURCE

#define __HAL_RCC_GET_SYSCLK_SOURCE

(

)

((uint32_t)(READ_BIT(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

__HAL_RCC_SYSCLK_CONFIG

#define __HAL_RCC_SYSCLK_CONFIG

(

__SYSCLKSOURCE__

)

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

Macro to configure the system clock source.

Parameters

__SYSCLKSOURCE__

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.