UTILS Private functions

Functions
static uint32_t	UTILS_GetPLLOutputFrequency (uint32_t PLL_InputFrequency, LL_UTILS_PLLInitTypeDef *UTILS_PLLInitStruct)
	Function to check that PLL can be modified.
static ErrorStatus	UTILS_EnablePLLAndSwitchSystem (uint32_t SYSCLK_Frequency, LL_UTILS_ClkInitTypeDef *UTILS_ClkInitStruct)
	Function to enable PLL and switch system clock to PLL.
static ErrorStatus	UTILS_IsPLLsReady (void)
	Check that all PLLs are ready therefore configuration can be done.

---

Function Documentation

static ErrorStatus UTILS_EnablePLLAndSwitchSystem	(	uint32_t	SYSCLK_Frequency,
		LL_UTILS_ClkInitTypeDef *	UTILS_ClkInitStruct
	)		[static]

Function to enable PLL and switch system clock to PLL.

Parameters:

SYSCLK_Frequency	SYSCLK frequency
UTILS_ClkInitStruct	pointer to a LL_UTILS_ClkInitTypeDef structure that contains the configuration information for the BUS prescalers.

Return values:

An	ErrorStatus enumeration value: SUCCESS: No problem to switch system to PLL ERROR: Problem to switch system to PLL

Definition at line 977 of file stm32h7xx_ll_utils.c.

References LL_UTILS_ClkInitTypeDef::AHBCLKDivider, LL_UTILS_ClkInitTypeDef::APB1CLKDivider, LL_UTILS_ClkInitTypeDef::APB2CLKDivider, LL_UTILS_ClkInitTypeDef::APB3CLKDivider, LL_UTILS_ClkInitTypeDef::APB4CLKDivider, assert_param, IS_LL_UTILS_AHB_DIV, IS_LL_UTILS_APB1_DIV, IS_LL_UTILS_APB2_DIV, IS_LL_UTILS_APB3_DIV, IS_LL_UTILS_APB4_DIV, IS_LL_UTILS_SYSCLK_DIV, LL_RCC_APB1_DIV_16, LL_RCC_APB2_DIV_16, LL_RCC_APB3_DIV_16, LL_RCC_APB4_DIV_16, LL_RCC_CALC_HCLK_FREQ, LL_RCC_GetSysClkSource(), LL_RCC_PLL1_Enable(), LL_RCC_PLL1_IsReady(), LL_RCC_SetAHBPrescaler(), LL_RCC_SetAPB1Prescaler(), LL_RCC_SetAPB2Prescaler(), LL_RCC_SetAPB3Prescaler(), LL_RCC_SetAPB4Prescaler(), LL_RCC_SetSysClkSource(), LL_RCC_SetSysPrescaler(), LL_RCC_SYS_CLKSOURCE_PLL1, LL_RCC_SYS_CLKSOURCE_STATUS_PLL1, LL_SetFlashLatency(), LL_SetSystemCoreClock(), and LL_UTILS_ClkInitTypeDef::SYSCLKDivider.

Referenced by LL_PLL_ConfigSystemClock_HSE(), and LL_PLL_ConfigSystemClock_HSI().

static uint32_t UTILS_GetPLLOutputFrequency	(	uint32_t	PLL_InputFrequency,
		LL_UTILS_PLLInitTypeDef *	UTILS_PLLInitStruct
	)		[static]

Function to check that PLL can be modified.

Parameters:

PLL_InputFrequency	PLL input frequency (in Hz)
UTILS_PLLInitStruct	pointer to a LL_UTILS_PLLInitTypeDef structure that contains the configuration information for the PLL.

Return values:

PLL	output frequency (in Hz)

Definition at line 919 of file stm32h7xx_ll_utils.c.

References assert_param, LL_UTILS_PLLInitTypeDef::FRACN, IS_LL_UTILS_FRACN_VALUE, IS_LL_UTILS_PLLM_VALUE, IS_LL_UTILS_PLLN_VALUE, IS_LL_UTILS_PLLP_VALUE, LL_RCC_CalcPLLClockFreq(), LL_UTILS_PLLInitTypeDef::PLLM, LL_UTILS_PLLInitTypeDef::PLLN, and LL_UTILS_PLLInitTypeDef::PLLP.

Referenced by LL_PLL_ConfigSystemClock_HSE(), and LL_PLL_ConfigSystemClock_HSI().

static ErrorStatus UTILS_IsPLLsReady

(

void

)

[static]

Check that all PLLs are ready therefore configuration can be done.

Return values:

An	ErrorStatus enumeration value: SUCCESS: All PLLs are ready so configuration can be done ERROR: One PLL at least is busy

Definition at line 940 of file stm32h7xx_ll_utils.c.

References LL_RCC_PLL1_IsReady(), LL_RCC_PLL2_IsReady(), and LL_RCC_PLL3_IsReady().

Referenced by LL_PLL_ConfigSystemClock_HSE(), and LL_PLL_ConfigSystemClock_HSI().