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/**
******************************************************************************
* @file stm32l0xx_ll_rcc.c
* @author MCD Application Team
* @brief RCC LL module driver.
******************************************************************************
* @attention
*
* Copyright (c) 2016 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file in
* the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
******************************************************************************
*/
#if defined(USE_FULL_LL_DRIVER)
/* Includes ------------------------------------------------------------------*/
#include "stm32l0xx_ll_rcc.h"
#ifdef USE_FULL_ASSERT
#include "stm32_assert.h"
#else
#define assert_param(expr) ((void)0U)
#endif /* USE_FULL_ASSERT */
/** @addtogroup STM32L0xx_LL_Driver
* @{
*/
#if defined(RCC)
/** @defgroup RCC_LL RCC
* @{
*/
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/
/** @addtogroup RCC_LL_Private_Macros
* @{
*/
#if defined(RCC_CCIPR_USART1SEL) && defined(RCC_CCIPR_USART2SEL)
#define IS_LL_RCC_USART_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_USART1_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_USART2_CLKSOURCE))
#elif defined(RCC_CCIPR_USART1SEL) && !defined(RCC_CCIPR_USART2SEL)
#define IS_LL_RCC_USART_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_USART1_CLKSOURCE))
#else
#define IS_LL_RCC_USART_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_USART2_CLKSOURCE))
#endif /* RCC_CCIPR_USART1SEL && RCC_CCIPR_USART2SEL */
#define IS_LL_RCC_LPUART_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_LPUART1_CLKSOURCE))
#if defined(RCC_CCIPR_I2C3SEL)
#define IS_LL_RCC_I2C_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_I2C1_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_I2C3_CLKSOURCE))
#else
#define IS_LL_RCC_I2C_CLKSOURCE(__VALUE__) ((__VALUE__) == LL_RCC_I2C1_CLKSOURCE)
#endif /* RCC_CCIPR_I2C3SEL */
#define IS_LL_RCC_LPTIM_CLKSOURCE(__VALUE__) ((__VALUE__) == LL_RCC_LPTIM1_CLKSOURCE)
#if defined(USB)
#define IS_LL_RCC_USB_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_USB_CLKSOURCE))
#endif /* USB */
/**
* @}
*/
/* Private function prototypes -----------------------------------------------*/
/** @defgroup RCC_LL_Private_Functions RCC Private functions
* @{
*/
static uint32_t RCC_GetSystemClockFreq(void);
static uint32_t RCC_GetHCLKClockFreq(uint32_t SYSCLK_Frequency);
static uint32_t RCC_GetPCLK1ClockFreq(uint32_t HCLK_Frequency);
static uint32_t RCC_GetPCLK2ClockFreq(uint32_t HCLK_Frequency);
static uint32_t RCC_PLL_GetFreqDomain_SYS(void);
/**
* @}
*/
/* Exported functions --------------------------------------------------------*/
/** @addtogroup RCC_LL_Exported_Functions
* @{
*/
/** @addtogroup RCC_LL_EF_Init
* @{
*/
/**
* @brief Reset the RCC clock configuration to the default reset state.
* @note The default reset state of the clock configuration is given below:
* - MSI ON and used as system clock source
* - HSE, HSI and PLL OFF
* - AHB, APB1 and APB2 prescaler set to 1.
* - CSS, MCO OFF
* - All interrupts disabled
* @note This function doesn't modify the configuration of the
* - Peripheral clocks
* - LSI, LSE and RTC clocks
* @retval An ErrorStatus enumeration value:
* - SUCCESS: RCC registers are de-initialized
* - ERROR: not applicable
*/
ErrorStatus LL_RCC_DeInit(void)
{
__IO uint32_t vl_mask;
/* Set MSION bit */
LL_RCC_MSI_Enable();
/* Insure MSIRDY bit is set before writing default MSIRANGE value */
while (LL_RCC_MSI_IsReady() == 0U)
{
__NOP();
}
/* Set MSIRANGE default value */
LL_RCC_MSI_SetRange(LL_RCC_MSIRANGE_5);
/* Set MSITRIM bits to the reset value*/
LL_RCC_MSI_SetCalibTrimming(0U);
/* Set HSITRIM bits to the reset value*/
LL_RCC_HSI_SetCalibTrimming(0x10U);
/* Reset SW, HPRE, PPRE1, PPRE2, MCOSEL and MCOPRE bits */
vl_mask = 0xFFFFFFFFU;
CLEAR_BIT(vl_mask, RCC_CFGR_SW | RCC_CFGR_HPRE | RCC_CFGR_PPRE1 | RCC_CFGR_PPRE2 | \
RCC_CFGR_MCOSEL | RCC_CFGR_MCOPRE);
LL_RCC_WriteReg(CFGR, vl_mask);
/* Reset HSI, HSE, PLL */
vl_mask = LL_RCC_ReadReg(CR);
#if defined(RCC_CR_HSIOUTEN)
CLEAR_BIT(vl_mask, RCC_CR_HSION| RCC_CR_HSIKERON| RCC_CR_HSIDIVEN | RCC_CR_HSIOUTEN | \
RCC_CR_HSEON | RCC_CR_PLLON);
#else
CLEAR_BIT(vl_mask, RCC_CR_HSION| RCC_CR_HSIKERON| RCC_CR_HSIDIVEN | \
RCC_CR_HSEON | RCC_CR_PLLON);
#endif
LL_RCC_WriteReg(CR, vl_mask);
/* Delay after an RCC peripheral clock */
vl_mask = LL_RCC_ReadReg(CR);
/* Reset HSEBYP bit */
LL_RCC_HSE_DisableBypass();
/* Set RCC_CR_RTCPRE to 0b00*/
CLEAR_BIT(vl_mask, RCC_CR_RTCPRE);
LL_RCC_WriteReg(CR, vl_mask);
/* Insure PLL is disabled before to reset PLLSRC/PLLMUL/PLLDIV in CFGR register */
while(LL_RCC_PLL_IsReady() != 0U) {};
/* Reset CFGR register */
LL_RCC_WriteReg(CFGR, 0x00000000U);
#if defined(RCC_HSI48_SUPPORT)
/* Reset CRRCR register to disable HSI48 */
#if defined(RCC_CRRCR_HSI48DIV6OUTEN)
CLEAR_BIT(RCC->CRRCR, (RCC_CRRCR_HSI48ON | RCC_CRRCR_HSI48DIV6OUTEN));
#else
CLEAR_BIT(RCC->CRRCR, RCC_CRRCR_HSI48ON);
#endif
#endif /*RCC_HSI48_SUPPORT*/
/* Disable all interrupts */
LL_RCC_WriteReg(CIER, 0x00000000U);
/* Disable all interrupt flags */
LL_RCC_WriteReg(CICR, 0xFFFFFFFFU);
/* Clear reset flags */
LL_RCC_ClearResetFlags();
return SUCCESS;
}
/**
* @}
*/
/** @addtogroup RCC_LL_EF_Get_Freq
* @brief Return the frequencies of different on chip clocks; System, AHB, APB1 and APB2 buses clocks
* and different peripheral clocks available on the device.
* @note If SYSCLK source is MSI, function returns values based on MSI clock(*)
* @note If SYSCLK source is HSI, function returns values based on HSI_VALUE(**)
* @note If SYSCLK source is HSE, function returns values based on HSE_VALUE(***)
* @note If SYSCLK source is PLL, function returns values based on
* HSI_VALUE(**) or HSE_VALUE(***) multiplied/divided by the PLL factors.
* @note (*) MSI clock depends on the selected MSI range but the real value
* may vary depending on the variations in voltage and temperature.
* @note (**) HSI_VALUE is a defined constant but the real value may vary
* depending on the variations in voltage and temperature.
* @note (***) HSE_VALUE is a defined constant, user has to ensure that
* HSE_VALUE is same as the real frequency of the crystal used.
* Otherwise, this function may have wrong result.
* @note The result of this function could be incorrect when using fractional
* value for HSE crystal.
* @note This function can be used by the user application to compute the
* baud-rate for the communication peripherals or configure other parameters.
* @{
*/
/**
* @brief Return the frequencies of different on chip clocks; System, AHB, APB1 and APB2 buses clocks
* @note Each time SYSCLK, HCLK, PCLK1 and/or PCLK2 clock changes, this function
* must be called to update structure fields. Otherwise, any
* configuration based on this function will be incorrect.
* @param RCC_Clocks pointer to a @ref LL_RCC_ClocksTypeDef structure which will hold the clocks frequencies
* @retval None
*/
void LL_RCC_GetSystemClocksFreq(LL_RCC_ClocksTypeDef *RCC_Clocks)
{
/* Get SYSCLK frequency */
RCC_Clocks->SYSCLK_Frequency = RCC_GetSystemClockFreq();
/* HCLK clock frequency */
RCC_Clocks->HCLK_Frequency = RCC_GetHCLKClockFreq(RCC_Clocks->SYSCLK_Frequency);
/* PCLK1 clock frequency */
RCC_Clocks->PCLK1_Frequency = RCC_GetPCLK1ClockFreq(RCC_Clocks->HCLK_Frequency);
/* PCLK2 clock frequency */
RCC_Clocks->PCLK2_Frequency = RCC_GetPCLK2ClockFreq(RCC_Clocks->HCLK_Frequency);
}
/**
* @brief Return USARTx clock frequency
* @param USARTxSource This parameter can be one of the following values:
* @arg @ref LL_RCC_USART1_CLKSOURCE
* @arg @ref LL_RCC_USART2_CLKSOURCE (*)
*
* (*) value not defined in all devices.
* @retval USART clock frequency (in Hz)
* @arg @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI or LSE) is not ready
*/
uint32_t LL_RCC_GetUSARTClockFreq(uint32_t USARTxSource)
{
uint32_t usart_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
/* Check parameter */
assert_param(IS_LL_RCC_USART_CLKSOURCE(USARTxSource));
#if defined(RCC_CCIPR_USART1SEL)
if (USARTxSource == LL_RCC_USART1_CLKSOURCE)
{
/* USART1CLK clock frequency */
switch (LL_RCC_GetUSARTClockSource(USARTxSource))
{
case LL_RCC_USART1_CLKSOURCE_SYSCLK: /* USART1 Clock is System Clock */
usart_frequency = RCC_GetSystemClockFreq();
break;
case LL_RCC_USART1_CLKSOURCE_HSI: /* USART1 Clock is HSI Osc. */
if (LL_RCC_HSI_IsReady() != 0U)
{
if (LL_RCC_IsActiveFlag_HSIDIV() != 0U)
{
usart_frequency = (HSI_VALUE >> 2U);
}
else
{
usart_frequency = HSI_VALUE;
}
}
break;
case LL_RCC_USART1_CLKSOURCE_LSE: /* USART1 Clock is LSE Osc. */
if (LL_RCC_LSE_IsReady() != 0U)
{
usart_frequency = LSE_VALUE;
}
break;
case LL_RCC_USART1_CLKSOURCE_PCLK2: /* USART1 Clock is PCLK2 */
default:
usart_frequency = RCC_GetPCLK2ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
break;
}
}
#endif /* RCC_CCIPR_USART1SEL */
#if defined(RCC_CCIPR_USART2SEL)
if (USARTxSource == LL_RCC_USART2_CLKSOURCE)
{
/* USART2CLK clock frequency */
switch (LL_RCC_GetUSARTClockSource(USARTxSource))
{
case LL_RCC_USART2_CLKSOURCE_SYSCLK: /* USART2 Clock is System Clock */
usart_frequency = RCC_GetSystemClockFreq();
break;
case LL_RCC_USART2_CLKSOURCE_HSI: /* USART2 Clock is HSI Osc. */
if (LL_RCC_HSI_IsReady() != 0U)
{
if (LL_RCC_IsActiveFlag_HSIDIV() != 0U)
{
usart_frequency = (HSI_VALUE >> 2U);
}
else
{
usart_frequency = HSI_VALUE;
}
}
break;
case LL_RCC_USART2_CLKSOURCE_LSE: /* USART2 Clock is LSE Osc. */
if (LL_RCC_LSE_IsReady() != 0U)
{
usart_frequency = LSE_VALUE;
}
break;
case LL_RCC_USART2_CLKSOURCE_PCLK1: /* USART2 Clock is PCLK1 */
default:
usart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
break;
}
}
#endif /* RCC_CCIPR_USART2SEL */
return usart_frequency;
}
/**
* @brief Return I2Cx clock frequency
* @param I2CxSource This parameter can be one of the following values:
* @arg @ref LL_RCC_I2C1_CLKSOURCE
* @arg @ref LL_RCC_I2C3_CLKSOURCE (*)
*
* (*) value not defined in all devices
* @retval I2C clock frequency (in Hz)
* @arg @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that HSI oscillator is not ready
*/
uint32_t LL_RCC_GetI2CClockFreq(uint32_t I2CxSource)
{
uint32_t i2c_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
/* Check parameter */
assert_param(IS_LL_RCC_I2C_CLKSOURCE(I2CxSource));
/* I2C1 CLK clock frequency */
if (I2CxSource == LL_RCC_I2C1_CLKSOURCE)
{
switch (LL_RCC_GetI2CClockSource(I2CxSource))
{
case LL_RCC_I2C1_CLKSOURCE_SYSCLK: /* I2C1 Clock is System Clock */
i2c_frequency = RCC_GetSystemClockFreq();
break;
case LL_RCC_I2C1_CLKSOURCE_HSI: /* I2C1 Clock is HSI Osc. */
if (LL_RCC_HSI_IsReady() != 0U)
{
if (LL_RCC_IsActiveFlag_HSIDIV() != 0U)
{
i2c_frequency = (HSI_VALUE >> 2U);
}
else
{
i2c_frequency = HSI_VALUE;
}
}
break;
case LL_RCC_I2C1_CLKSOURCE_PCLK1: /* I2C1 Clock is PCLK1 */
default:
i2c_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
break;
}
}
#if defined(RCC_CCIPR_I2C3SEL)
/* I2C3 CLK clock frequency */
if (I2CxSource == LL_RCC_I2C3_CLKSOURCE)
{
switch (LL_RCC_GetI2CClockSource(I2CxSource))
{
case LL_RCC_I2C3_CLKSOURCE_SYSCLK: /* I2C3 Clock is System Clock */
i2c_frequency = RCC_GetSystemClockFreq();
break;
case LL_RCC_I2C3_CLKSOURCE_HSI: /* I2C3 Clock is HSI Osc. */
if (LL_RCC_HSI_IsReady() != 0U)
{
if (LL_RCC_IsActiveFlag_HSIDIV() != 0U)
{
i2c_frequency = (HSI_VALUE >> 2U);
}
else
{
i2c_frequency = HSI_VALUE;
}
}
break;
case LL_RCC_I2C3_CLKSOURCE_PCLK1: /* I2C3 Clock is PCLK1 */
default:
i2c_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
break;
}
}
#endif /*RCC_CCIPR_I2C3SEL*/
return i2c_frequency;
}
/**
* @brief Return LPUARTx clock frequency
* @param LPUARTxSource This parameter can be one of the following values:
* @arg @ref LL_RCC_LPUART1_CLKSOURCE
* @retval LPUART clock frequency (in Hz)
* @arg @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI or LSE) is not ready
*/
uint32_t LL_RCC_GetLPUARTClockFreq(uint32_t LPUARTxSource)
{
uint32_t lpuart_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
/* Check parameter */
assert_param(IS_LL_RCC_LPUART_CLKSOURCE(LPUARTxSource));
/* LPUART1CLK clock frequency */
switch (LL_RCC_GetLPUARTClockSource(LPUARTxSource))
{
case LL_RCC_LPUART1_CLKSOURCE_SYSCLK: /* LPUART1 Clock is System Clock */
lpuart_frequency = RCC_GetSystemClockFreq();
break;
case LL_RCC_LPUART1_CLKSOURCE_HSI: /* LPUART1 Clock is HSI Osc. */
if (LL_RCC_HSI_IsReady() != 0U)
{
if (LL_RCC_IsActiveFlag_HSIDIV() != 0U)
{
lpuart_frequency = (HSI_VALUE >> 2U);
}
else
{
lpuart_frequency = HSI_VALUE;
}
}
break;
case LL_RCC_LPUART1_CLKSOURCE_LSE: /* LPUART1 Clock is LSE Osc. */
if (LL_RCC_LSE_IsReady() != 0U)
{
lpuart_frequency = LSE_VALUE;
}
break;
case LL_RCC_LPUART1_CLKSOURCE_PCLK1: /* LPUART1 Clock is PCLK1 */
default:
lpuart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
break;
}
return lpuart_frequency;
}
/**
* @brief Return LPTIMx clock frequency
* @param LPTIMxSource This parameter can be one of the following values:
* @arg @ref LL_RCC_LPTIM1_CLKSOURCE
* @retval LPTIM clock frequency (in Hz)
* @arg @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI or LSE) is not ready
*/
uint32_t LL_RCC_GetLPTIMClockFreq(uint32_t LPTIMxSource)
{
uint32_t lptim_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
/* Check parameter */
assert_param(IS_LL_RCC_LPTIM_CLKSOURCE(LPTIMxSource));
if (LPTIMxSource == LL_RCC_LPTIM1_CLKSOURCE)
{
/* LPTIM1CLK clock frequency */
switch (LL_RCC_GetLPTIMClockSource(LPTIMxSource))
{
case LL_RCC_LPTIM1_CLKSOURCE_LSI: /* LPTIM1 Clock is LSI Osc. */
if (LL_RCC_LSI_IsReady() != 0U)
{
lptim_frequency = LSI_VALUE;
}
break;
case LL_RCC_LPTIM1_CLKSOURCE_HSI: /* LPTIM1 Clock is HSI Osc. */
if (LL_RCC_HSI_IsReady() != 0U)
{
if (LL_RCC_IsActiveFlag_HSIDIV() != 0U)
{
lptim_frequency = (HSI_VALUE >> 2U);
}
else
{
lptim_frequency = HSI_VALUE;
}
}
break;
case LL_RCC_LPTIM1_CLKSOURCE_LSE: /* LPTIM1 Clock is LSE Osc. */
if (LL_RCC_LSE_IsReady() != 0U)
{
lptim_frequency = LSE_VALUE;
}
break;
case LL_RCC_LPTIM1_CLKSOURCE_PCLK1: /* LPTIM1 Clock is PCLK1 */
default:
lptim_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
break;
}
}
return lptim_frequency;
}
#if defined(USB)
/**
* @brief Return USBx clock frequency
* @param USBxSource This parameter can be one of the following values:
* @arg @ref LL_RCC_USB_CLKSOURCE
* @retval USB clock frequency (in Hz)
* @arg @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI48) or PLL is not ready
* @arg @ref LL_RCC_PERIPH_FREQUENCY_NA indicates that no clock source selected
*/
uint32_t LL_RCC_GetUSBClockFreq(uint32_t USBxSource)
{
uint32_t usb_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
/* Check parameter */
assert_param(IS_LL_RCC_USB_CLKSOURCE(USBxSource));
/* USBCLK clock frequency */
switch (LL_RCC_GetUSBClockSource(USBxSource))
{
case LL_RCC_USB_CLKSOURCE_PLL: /* PLL clock used as USB clock source */
if (LL_RCC_PLL_IsReady() != 0U)
{
usb_frequency = RCC_PLL_GetFreqDomain_SYS();
}
break;
case LL_RCC_USB_CLKSOURCE_HSI48: /* HSI48 clock used as USB clock source */
default:
if (LL_RCC_HSI48_IsReady() != 0U)
{
usb_frequency = HSI48_VALUE;
}
break;
}
return usb_frequency;
}
#endif /* USB */
/**
* @}
*/
/**
* @}
*/
/** @addtogroup RCC_LL_Private_Functions
* @{
*/
/**
* @brief Return SYSTEM clock frequency
* @retval SYSTEM clock frequency (in Hz)
*/
static uint32_t RCC_GetSystemClockFreq(void)
{
uint32_t frequency;
/* Get SYSCLK source -------------------------------------------------------*/
switch (LL_RCC_GetSysClkSource())
{
case LL_RCC_SYS_CLKSOURCE_STATUS_MSI: /* MSI used as system clock source */
frequency = __LL_RCC_CALC_MSI_FREQ(LL_RCC_MSI_GetRange());
break;
case LL_RCC_SYS_CLKSOURCE_STATUS_HSI: /* HSI used as system clock source */
if (LL_RCC_IsActiveFlag_HSIDIV() != 0U)
{
frequency = (HSI_VALUE >> 2U);
}
else
{
frequency = HSI_VALUE;
}
break;
case LL_RCC_SYS_CLKSOURCE_STATUS_HSE: /* HSE used as system clock source */
frequency = HSE_VALUE;
break;
case LL_RCC_SYS_CLKSOURCE_STATUS_PLL: /* PLL used as system clock source */
frequency = RCC_PLL_GetFreqDomain_SYS();
break;
default:
frequency = __LL_RCC_CALC_MSI_FREQ(LL_RCC_MSI_GetRange());
break;
}
return frequency;
}
/**
* @brief Return HCLK clock frequency
* @param SYSCLK_Frequency SYSCLK clock frequency
* @retval HCLK clock frequency (in Hz)
*/
static uint32_t RCC_GetHCLKClockFreq(uint32_t SYSCLK_Frequency)
{
/* HCLK clock frequency */
return __LL_RCC_CALC_HCLK_FREQ(SYSCLK_Frequency, LL_RCC_GetAHBPrescaler());
}
/**
* @brief Return PCLK1 clock frequency
* @param HCLK_Frequency HCLK clock frequency
* @retval PCLK1 clock frequency (in Hz)
*/
static uint32_t RCC_GetPCLK1ClockFreq(uint32_t HCLK_Frequency)
{
/* PCLK1 clock frequency */
return __LL_RCC_CALC_PCLK1_FREQ(HCLK_Frequency, LL_RCC_GetAPB1Prescaler());
}
/**
* @brief Return PCLK2 clock frequency
* @param HCLK_Frequency HCLK clock frequency
* @retval PCLK2 clock frequency (in Hz)
*/
static uint32_t RCC_GetPCLK2ClockFreq(uint32_t HCLK_Frequency)
{
/* PCLK2 clock frequency */
return __LL_RCC_CALC_PCLK2_FREQ(HCLK_Frequency, LL_RCC_GetAPB2Prescaler());
}
/**
* @brief Return PLL clock frequency used for system domain
* @retval PLL clock frequency (in Hz)
*/
static uint32_t RCC_PLL_GetFreqDomain_SYS(void)
{
uint32_t pllinputfreq, pllsource;
/* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLL divider) * PLL Multiplicator */
/* Get PLL source */
pllsource = LL_RCC_PLL_GetMainSource();
switch (pllsource)
{
case LL_RCC_PLLSOURCE_HSI: /* HSI used as PLL clock source */
if (LL_RCC_IsActiveFlag_HSIDIV() != 0U)
{
pllinputfreq = (HSI_VALUE >> 2U);
}
else
{
pllinputfreq = HSI_VALUE;
}
break;
default: /* HSE used as PLL clock source */
pllinputfreq = HSE_VALUE;
break;
}
return __LL_RCC_CALC_PLLCLK_FREQ(pllinputfreq, LL_RCC_PLL_GetMultiplicator(), LL_RCC_PLL_GetDivider());
}
/**
* @}
*/
/**
* @}
*/
#endif /* defined(RCC) */
/**
* @}
*/
#endif /* USE_FULL_LL_DRIVER */