__HAL_RCC_GET_SYSCLK_SOURCE macro

Macro to get the clock source used as system clock.

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Declaration

from stm32f4xx_hal_rcc.h:1081

#define __HAL_RCC_GET_SYSCLK_SOURCE() (RCC->CFGR & RCC_CFGR_SWS)

Return value

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. - RCC_SYSCLKSOURCE_STATUS_PLLRCLK: PLLR used as system clock. This parameter is available only for STM32F446xx devices.

Examples

__HAL_RCC_GET_SYSCLK_SOURCE is referenced by 4 libraries and example projects:

References

from examples

__HAL_RCC_GET_SYSCLK_SOURCE macro

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