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_SetFlashLatency (uint32_t HCLK_Frequency)
	Update number of Flash wait states in line with new frequency and current voltage range.
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_PLL_IsBusy (void)
	Function to check that PLL can be modified.

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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 686 of file stm32f4xx_ll_utils.c.

References __LL_RCC_CALC_HCLK_FREQ, LL_UTILS_ClkInitTypeDef::AHBCLKDivider, LL_UTILS_ClkInitTypeDef::APB1CLKDivider, LL_UTILS_ClkInitTypeDef::APB2CLKDivider, assert_param, IS_LL_UTILS_APB1_DIV, IS_LL_UTILS_APB2_DIV, IS_LL_UTILS_SYSCLK_DIV, LL_RCC_GetSysClkSource(), LL_RCC_PLL_Enable(), LL_RCC_PLL_IsReady(), LL_RCC_SetAHBPrescaler(), LL_RCC_SetAPB1Prescaler(), LL_RCC_SetAPB2Prescaler(), LL_RCC_SetSysClkSource(), LL_RCC_SYS_CLKSOURCE_PLL, LL_RCC_SYS_CLKSOURCE_STATUS_PLL, LL_SetSystemCoreClock(), and UTILS_SetFlashLatency().

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 616 of file stm32f4xx_ll_utils.c.

References assert_param, IS_LL_UTILS_PLL_FREQUENCY, IS_LL_UTILS_PLLM_VALUE, IS_LL_UTILS_PLLN_VALUE, IS_LL_UTILS_PLLP_VALUE, IS_LL_UTILS_PLLVCO_INPUT, IS_LL_UTILS_PLLVCO_OUTPUT, 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_PLL_IsBusy

(

void

)

[static]

Function to check that PLL can be modified.

Return values:

An	ErrorStatus enumeration value: SUCCESS: PLL modification can be done ERROR: PLL is busy

Definition at line 647 of file stm32f4xx_ll_utils.c.

References LL_RCC_PLL_IsReady(), LL_RCC_PLLI2S_IsReady(), and LL_RCC_PLLSAI_IsReady().

Referenced by LL_PLL_ConfigSystemClock_HSE(), and LL_PLL_ConfigSystemClock_HSI().

static ErrorStatus UTILS_SetFlashLatency

(

uint32_t

HCLK_Frequency

)

[static]

Update number of Flash wait states in line with new frequency and current voltage range.

Note:

This Function support ONLY devices with supply voltage (voltage range) between 2.7V and 3.6V

Parameters:

HCLK_Frequency

HCLK frequency

Return values:

An	ErrorStatus enumeration value: SUCCESS: Latency has been modified ERROR: Latency cannot be modified

Definition at line 493 of file stm32f4xx_ll_utils.c.

References LL_FLASH_GetLatency(), LL_FLASH_LATENCY_0, LL_FLASH_LATENCY_1, LL_FLASH_LATENCY_2, LL_FLASH_LATENCY_3, LL_FLASH_LATENCY_4, LL_FLASH_LATENCY_5, LL_FLASH_SetLatency(), LL_PWR_GetRegulVoltageScaling(), LL_PWR_REGU_VOLTAGE_SCALE1, LL_PWR_REGU_VOLTAGE_SCALE2, LL_PWR_REGU_VOLTAGE_SCALE3, UTILS_SCALE1_LATENCY1_FREQ, UTILS_SCALE1_LATENCY2_FREQ, UTILS_SCALE1_LATENCY3_FREQ, UTILS_SCALE1_LATENCY4_FREQ, UTILS_SCALE1_LATENCY5_FREQ, UTILS_SCALE2_LATENCY1_FREQ, UTILS_SCALE2_LATENCY2_FREQ, UTILS_SCALE2_LATENCY3_FREQ, UTILS_SCALE2_LATENCY4_FREQ, UTILS_SCALE2_LATENCY5_FREQ, UTILS_SCALE3_LATENCY1_FREQ, UTILS_SCALE3_LATENCY2_FREQ, and UTILS_SCALE3_LATENCY3_FREQ.

Referenced by UTILS_EnablePLLAndSwitchSystem().