/**
******************************************************************************
* @file stm32f3xx_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 "stm32f3xx_ll_rcc.h"
#ifdef USE_FULL_ASSERT
#include "stm32_assert.h"
#else
#define assert_param(expr) ((void)0U)
#endif /* USE_FULL_ASSERT */
/** @addtogroup STM32F3xx_LL_Driver
* @{
*/
#if defined(RCC)
/** @defgroup RCC_LL RCC
* @{
*/
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/** @addtogroup RCC_LL_Private_Variables
* @{
*/
#if defined(RCC_CFGR2_ADC1PRES) || defined(RCC_CFGR2_ADCPRE12) || defined(RCC_CFGR2_ADCPRE34)
static const uint16_t aADCPrescTable[16U] = {1U, 2U, 4U, 6U, 8U, 10U, 12U, 16U, 32U, 64U, 128U, 256U, 256U, 256U, 256U, 256U};
#endif /* RCC_CFGR2_ADC1PRES || RCC_CFGR2_ADCPRE12 || RCC_CFGR2_ADCPRE34 */
#if defined(RCC_CFGR_SDPRE)
static const uint8_t aSDADCPrescTable[16U] = {2U, 4U, 6U, 8U, 10U, 12U, 14U, 16U, 20U, 24U, 28U, 32U, 36U, 40U, 44U, 48U};
#endif /* RCC_CFGR_SDPRE */
/**
* @}
*/
/* Private constants ---------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/
/** @addtogroup RCC_LL_Private_Macros
* @{
*/
#if defined(RCC_CFGR3_USART2SW) && defined(RCC_CFGR3_USART3SW)
#define IS_LL_RCC_USART_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_USART1_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_USART2_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_USART3_CLKSOURCE))
#elif defined(RCC_CFGR3_USART2SW) && !defined(RCC_CFGR3_USART3SW)
#define IS_LL_RCC_USART_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_USART1_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_USART2_CLKSOURCE))
#elif defined(RCC_CFGR3_USART3SW) && !defined(RCC_CFGR3_USART2SW)
#define IS_LL_RCC_USART_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_USART1_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_USART3_CLKSOURCE))
#else
#define IS_LL_RCC_USART_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_USART1_CLKSOURCE))
#endif /* RCC_CFGR3_USART2SW && RCC_CFGR3_USART3SW */
#if defined(UART4) && defined(UART5)
#define IS_LL_RCC_UART_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_UART4_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_UART5_CLKSOURCE))
#elif defined(UART4)
#define IS_LL_RCC_UART_INSTANCE(__VALUE__) ((__VALUE__) == LL_RCC_UART4_CLKSOURCE)
#elif defined(UART5)
#define IS_LL_RCC_UART_INSTANCE(__VALUE__) ((__VALUE__) == LL_RCC_UART5_CLKSOURCE)
#endif /* UART4 && UART5*/
#if defined(RCC_CFGR3_I2C2SW) && defined(RCC_CFGR3_I2C3SW)
#define IS_LL_RCC_I2C_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_I2C1_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_I2C2_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_I2C3_CLKSOURCE))
#elif defined(RCC_CFGR3_I2C2SW) && !defined(RCC_CFGR3_I2C3SW)
#define IS_LL_RCC_I2C_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_I2C1_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_I2C2_CLKSOURCE))
#elif defined(RCC_CFGR3_I2C3SW) && !defined(RCC_CFGR3_I2C2SW)
#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_CFGR3_I2C2SW && RCC_CFGR3_I2C3SW */
#define IS_LL_RCC_I2S_CLKSOURCE(__VALUE__) ((__VALUE__) == LL_RCC_I2S_CLKSOURCE)
#if defined(USB)
#define IS_LL_RCC_USB_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_USB_CLKSOURCE))
#endif /* USB */
#if defined(RCC_CFGR_ADCPRE)
#define IS_LL_RCC_ADC_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_ADC_CLKSOURCE))
#else
#if defined(RCC_CFGR2_ADC1PRES)
#define IS_LL_RCC_ADC_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_ADC1_CLKSOURCE))
#elif defined(RCC_CFGR2_ADCPRE12) && defined(RCC_CFGR2_ADCPRE34)
#define IS_LL_RCC_ADC_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_ADC12_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_ADC34_CLKSOURCE))
#else /* RCC_CFGR2_ADCPRE12 */
#define IS_LL_RCC_ADC_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_ADC12_CLKSOURCE))
#endif /* RCC_CFGR2_ADC1PRES */
#endif /* RCC_CFGR_ADCPRE */
#if defined(RCC_CFGR_SDPRE)
#define IS_LL_RCC_SDADC_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_SDADC_CLKSOURCE))
#endif /* RCC_CFGR_SDPRE */
#if defined(CEC)
#define IS_LL_RCC_CEC_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_CEC_CLKSOURCE))
#endif /* CEC */
#if defined(RCC_CFGR3_TIMSW)
#if defined(RCC_CFGR3_TIM8SW) && defined(RCC_CFGR3_TIM15SW) && defined(RCC_CFGR3_TIM16SW) \
&& defined(RCC_CFGR3_TIM17SW) && defined(RCC_CFGR3_TIM20SW) && defined(RCC_CFGR3_TIM2SW) \
&& defined(RCC_CFGR3_TIM34SW)
#define IS_LL_RCC_TIM_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_TIM1_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_TIM2_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_TIM8_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_TIM15_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_TIM16_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_TIM17_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_TIM20_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_TIM34_CLKSOURCE))
#elif !defined(RCC_CFGR3_TIM8SW) && defined(RCC_CFGR3_TIM15SW) && defined(RCC_CFGR3_TIM16SW) \
&& defined(RCC_CFGR3_TIM17SW) && !defined(RCC_CFGR3_TIM20SW) && defined(RCC_CFGR3_TIM2SW) \
&& defined(RCC_CFGR3_TIM34SW)
#define IS_LL_RCC_TIM_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_TIM1_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_TIM2_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_TIM15_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_TIM16_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_TIM17_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_TIM34_CLKSOURCE))
#elif defined(RCC_CFGR3_TIM8SW) && !defined(RCC_CFGR3_TIM15SW) && !defined(RCC_CFGR3_TIM16SW) \
&& !defined(RCC_CFGR3_TIM17SW) && !defined(RCC_CFGR3_TIM20SW) && !defined(RCC_CFGR3_TIM2SW) \
&& !defined(RCC_CFGR3_TIM34SW)
#define IS_LL_RCC_TIM_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_TIM1_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_TIM8_CLKSOURCE))
#elif !defined(RCC_CFGR3_TIM8SW) && defined(RCC_CFGR3_TIM15SW) && defined(RCC_CFGR3_TIM16SW) \
&& defined(RCC_CFGR3_TIM17SW) && !defined(RCC_CFGR3_TIM20SW) && !defined(RCC_CFGR3_TIM2SW) \
&& !defined(RCC_CFGR3_TIM34SW)
#define IS_LL_RCC_TIM_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_TIM1_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_TIM15_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_TIM16_CLKSOURCE) \
|| ((__VALUE__) == LL_RCC_TIM17_CLKSOURCE))
#elif !defined(RCC_CFGR3_TIM8SW) && !defined(RCC_CFGR3_TIM15SW) && !defined(RCC_CFGR3_TIM16SW) \
&& !defined(RCC_CFGR3_TIM17SW) && !defined(RCC_CFGR3_TIM20SW) && !defined(RCC_CFGR3_TIM2SW) \
&& !defined(RCC_CFGR3_TIM34SW)
#define IS_LL_RCC_TIM_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_TIM1_CLKSOURCE))
#else
#error "Miss macro"
#endif /* RCC_CFGR3_TIMxSW */
#endif /* RCC_CFGR3_TIMSW */
#if defined(HRTIM1)
#define IS_LL_RCC_HRTIM_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_HRTIM1_CLKSOURCE))
#endif /* HRTIM1 */
/**
* @}
*/
/* Private function prototypes -----------------------------------------------*/
/** @defgroup RCC_LL_Private_Functions RCC Private functions
* @{
*/
uint32_t RCC_GetSystemClockFreq(void);
uint32_t RCC_GetHCLKClockFreq(uint32_t SYSCLK_Frequency);
uint32_t RCC_GetPCLK1ClockFreq(uint32_t HCLK_Frequency);
uint32_t RCC_GetPCLK2ClockFreq(uint32_t HCLK_Frequency);
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:
* - HSI ON and used as system clock source
* - HSE 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 HSION bit */
LL_RCC_HSI_Enable();
/* Wait for HSI READY bit */
while(LL_RCC_HSI_IsReady() != 1U)
{}
/* Set HSITRIM bits to the reset value*/
LL_RCC_HSI_SetCalibTrimming(0x10U);
/* Reset SW, HPRE, PPRE and MCOSEL bits */
vl_mask = 0xFFFFFFFFU;
CLEAR_BIT(vl_mask, (RCC_CFGR_SW | RCC_CFGR_HPRE | RCC_CFGR_PPRE1 |\
RCC_CFGR_PPRE2 | RCC_CFGR_MCOSEL));
/* Write new value in CFGR register */
LL_RCC_WriteReg(CFGR, vl_mask);
/* Wait till system clock source is ready */
while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_HSI)
{}
/* Read CR register */
vl_mask = LL_RCC_ReadReg(CR);
/* Reset HSEON, CSSON, PLLON bits */
CLEAR_BIT(vl_mask, (RCC_CR_PLLON | RCC_CR_CSSON | RCC_CR_HSEON));
/* Write new value in CR register */
LL_RCC_WriteReg(CR, vl_mask);
/* Wait for PLL READY bit to be reset */
while(LL_RCC_PLL_IsReady() != 0U)
{}
/* Reset HSEBYP bit */
LL_RCC_HSE_DisableBypass();
/* Reset CFGR register */
LL_RCC_WriteReg(CFGR, 0x00000000U);
/* Reset CFGR2 register */
LL_RCC_WriteReg(CFGR2, 0x00000000U);
/* Reset CFGR3 register */
LL_RCC_WriteReg(CFGR3, 0x00000000U);
/* Clear pending flags */
vl_mask = (LL_RCC_CIR_LSIRDYC | LL_RCC_CIR_LSERDYC | LL_RCC_CIR_HSIRDYC |\
LL_RCC_CIR_HSERDYC | LL_RCC_CIR_PLLRDYC | LL_RCC_CIR_CSSC);
/* Write new value in CIR register */
LL_RCC_WriteReg(CIR, vl_mask);
/* Disable all interrupts */
LL_RCC_WriteReg(CIR, 0x00000000U);
/* 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 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 (**) 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 (*)
* @arg @ref LL_RCC_USART3_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_CFGR3_USART1SW)
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())
{
usart_frequency = HSI_VALUE;
}
break;
case LL_RCC_USART1_CLKSOURCE_LSE: /* USART1 Clock is LSE Osc. */
if (LL_RCC_LSE_IsReady())
{
usart_frequency = LSE_VALUE;
}
break;
#if defined(RCC_CFGR3_USART1SW_PCLK1)
case LL_RCC_USART1_CLKSOURCE_PCLK1: /* USART1 Clock is PCLK1 */
default:
usart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
#else
case LL_RCC_USART1_CLKSOURCE_PCLK2: /* USART1 Clock is PCLK2 */
default:
usart_frequency = RCC_GetPCLK2ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
#endif /* RCC_CFGR3_USART1SW_PCLK1 */
break;
}
}
#endif /* RCC_CFGR3_USART1SW */
#if defined(RCC_CFGR3_USART2SW)
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())
{
usart_frequency = HSI_VALUE;
}
break;
case LL_RCC_USART2_CLKSOURCE_LSE: /* USART2 Clock is LSE Osc. */
if (LL_RCC_LSE_IsReady())
{
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_CFGR3_USART2SW */
#if defined(RCC_CFGR3_USART3SW)
if (USARTxSource == LL_RCC_USART3_CLKSOURCE)
{
/* USART3CLK clock frequency */
switch (LL_RCC_GetUSARTClockSource(USARTxSource))
{
case LL_RCC_USART3_CLKSOURCE_SYSCLK: /* USART3 Clock is System Clock */
usart_frequency = RCC_GetSystemClockFreq();
break;
case LL_RCC_USART3_CLKSOURCE_HSI: /* USART3 Clock is HSI Osc. */
if (LL_RCC_HSI_IsReady())
{
usart_frequency = HSI_VALUE;
}
break;
case LL_RCC_USART3_CLKSOURCE_LSE: /* USART3 Clock is LSE Osc. */
if (LL_RCC_LSE_IsReady())
{
usart_frequency = LSE_VALUE;
}
break;
case LL_RCC_USART3_CLKSOURCE_PCLK1: /* USART3 Clock is PCLK1 */
default:
usart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
break;
}
}
#endif /* RCC_CFGR3_USART3SW */
return usart_frequency;
}
#if defined(UART4) || defined(UART5)
/**
* @brief Return UARTx clock frequency
* @param UARTxSource This parameter can be one of the following values:
* @arg @ref LL_RCC_UART4_CLKSOURCE
* @arg @ref LL_RCC_UART5_CLKSOURCE
* @retval UART clock frequency (in Hz)
* @arg @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI or LSE) is not ready
*/
uint32_t LL_RCC_GetUARTClockFreq(uint32_t UARTxSource)
{
uint32_t uart_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
/* Check parameter */
assert_param(IS_LL_RCC_UART_CLKSOURCE(UARTxSource));
#if defined(UART4)
if (UARTxSource == LL_RCC_UART4_CLKSOURCE)
{
/* UART4CLK clock frequency */
switch (LL_RCC_GetUARTClockSource(UARTxSource))
{
case LL_RCC_UART4_CLKSOURCE_SYSCLK: /* UART4 Clock is System Clock */
uart_frequency = RCC_GetSystemClockFreq();
break;
case LL_RCC_UART4_CLKSOURCE_HSI: /* UART4 Clock is HSI Osc. */
if (LL_RCC_HSI_IsReady())
{
uart_frequency = HSI_VALUE;
}
break;
case LL_RCC_UART4_CLKSOURCE_LSE: /* UART4 Clock is LSE Osc. */
if (LL_RCC_LSE_IsReady())
{
uart_frequency = LSE_VALUE;
}
break;
case LL_RCC_UART4_CLKSOURCE_PCLK1: /* UART4 Clock is PCLK1 */
default:
uart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
break;
}
}
#endif /* UART4 */
#if defined(UART5)
if (UARTxSource == LL_RCC_UART5_CLKSOURCE)
{
/* UART5CLK clock frequency */
switch (LL_RCC_GetUARTClockSource(UARTxSource))
{
case LL_RCC_UART5_CLKSOURCE_SYSCLK: /* UART5 Clock is System Clock */
uart_frequency = RCC_GetSystemClockFreq();
break;
case LL_RCC_UART5_CLKSOURCE_HSI: /* UART5 Clock is HSI Osc. */
if (LL_RCC_HSI_IsReady())
{
uart_frequency = HSI_VALUE;
}
break;
case LL_RCC_UART5_CLKSOURCE_LSE: /* UART5 Clock is LSE Osc. */
if (LL_RCC_LSE_IsReady())
{
uart_frequency = LSE_VALUE;
}
break;
case LL_RCC_UART5_CLKSOURCE_PCLK1: /* UART5 Clock is PCLK1 */
default:
uart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
break;
}
}
#endif /* UART5 */
return uart_frequency;
}
#endif /* UART4 || UART5 */
/**
* @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_I2C2_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. */
default:
if (LL_RCC_HSI_IsReady())
{
i2c_frequency = HSI_VALUE;
}
break;
}
}
#if defined(RCC_CFGR3_I2C2SW)
/* I2C2 CLK clock frequency */
if (I2CxSource == LL_RCC_I2C2_CLKSOURCE)
{
switch (LL_RCC_GetI2CClockSource(I2CxSource))
{
case LL_RCC_I2C2_CLKSOURCE_SYSCLK: /* I2C2 Clock is System Clock */
i2c_frequency = RCC_GetSystemClockFreq();
break;
case LL_RCC_I2C2_CLKSOURCE_HSI: /* I2C2 Clock is HSI Osc. */
default:
if (LL_RCC_HSI_IsReady())
{
i2c_frequency = HSI_VALUE;
}
break;
}
}
#endif /*RCC_CFGR3_I2C2SW*/
#if defined(RCC_CFGR3_I2C3SW)
/* 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. */
default:
if (LL_RCC_HSI_IsReady())
{
i2c_frequency = HSI_VALUE;
}
break;
}
}
#endif /*RCC_CFGR3_I2C3SW*/
return i2c_frequency;
}
#if defined(RCC_CFGR_I2SSRC)
/**
* @brief Return I2Sx clock frequency
* @param I2SxSource This parameter can be one of the following values:
* @arg @ref LL_RCC_I2S_CLKSOURCE
* @retval I2S clock frequency (in Hz)
* @arg @ref LL_RCC_PERIPH_FREQUENCY_NA indicates that external clock is used */
uint32_t LL_RCC_GetI2SClockFreq(uint32_t I2SxSource)
{
uint32_t i2s_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
/* Check parameter */
assert_param(IS_LL_RCC_I2S_CLKSOURCE(I2SxSource));
/* I2S1CLK clock frequency */
switch (LL_RCC_GetI2SClockSource(I2SxSource))
{
case LL_RCC_I2S_CLKSOURCE_SYSCLK: /*!< System clock selected as I2S clock source */
i2s_frequency = RCC_GetSystemClockFreq();
break;
/* If an external I2S clock has to be used, LL_RCC_SetI2SClockSource(LL_RCC_I2S_CLKSOURCE_PIN)
have to be called in the main after calling SystemClock_Config() */
case LL_RCC_I2S_CLKSOURCE_PIN: /*!< External clock selected as I2S clock source */
i2s_frequency = EXTERNAL_CLOCK_VALUE;
break;
default:
i2s_frequency = LL_RCC_PERIPH_FREQUENCY_NA;
break;
}
return i2s_frequency;
}
#endif /* RCC_CFGR_I2SSRC */
#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())
{
usb_frequency = RCC_PLL_GetFreqDomain_SYS();
}
break;
case LL_RCC_USB_CLKSOURCE_PLL_DIV_1_5: /* PLL clock used as USB clock source */
default:
if (LL_RCC_PLL_IsReady())
{
usb_frequency = (RCC_PLL_GetFreqDomain_SYS() * 3U) / 2U;
}
break;
}
return usb_frequency;
}
#endif /* USB */
#if defined(RCC_CFGR_ADCPRE) || defined(RCC_CFGR2_ADC1PRES) || defined(RCC_CFGR2_ADCPRE12) || defined(RCC_CFGR2_ADCPRE34)
/**
* @brief Return ADCx clock frequency
* @param ADCxSource This parameter can be one of the following values:
* @arg @ref LL_RCC_ADC_CLKSOURCE (*)
* @arg @ref LL_RCC_ADC1_CLKSOURCE (*)
* @arg @ref LL_RCC_ADC12_CLKSOURCE (*)
* @arg @ref LL_RCC_ADC34_CLKSOURCE (*)
*
* (*) value not defined in all devices
* @retval ADC clock frequency (in Hz)
*/
uint32_t LL_RCC_GetADCClockFreq(uint32_t ADCxSource)
{
uint32_t adc_prescaler = 0U;
uint32_t adc_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
/* Check parameter */
assert_param(IS_LL_RCC_ADC_CLKSOURCE(ADCxSource));
/* Get ADC prescaler */
adc_prescaler = LL_RCC_GetADCClockSource(ADCxSource);
#if defined(RCC_CFGR_ADCPRE)
/* ADC frequency = PCLK2 frequency / ADC prescaler (2, 4, 6 or 8) */
adc_frequency = RCC_GetPCLK2ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()))
/ (((adc_prescaler >> POSITION_VAL(ADCxSource)) + 1U) * 2U);
#else
if ((adc_prescaler & 0x0000FFFFU) == ((uint32_t)0x00000000U))
{
/* ADC frequency = HCLK frequency */
adc_frequency = RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq());
}
else
{
/* ADC frequency = PCLK2 frequency / ADC prescaler (from 1 to 256) */
adc_frequency = RCC_GetPCLK2ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()))
/ (aADCPrescTable[((adc_prescaler & 0x0000FFFFU) >> POSITION_VAL(ADCxSource)) & 0xFU]);
}
#endif /* RCC_CFGR_ADCPRE */
return adc_frequency;
}
#endif /*RCC_CFGR_ADCPRE || RCC_CFGR2_ADC1PRES || RCC_CFGR2_ADCPRE12 || RCC_CFGR2_ADCPRE34 */
#if defined(RCC_CFGR_SDPRE)
/**
* @brief Return SDADCx clock frequency
* @param SDADCxSource This parameter can be one of the following values:
* @arg @ref LL_RCC_SDADC_CLKSOURCE
* @retval SDADC clock frequency (in Hz)
*/
uint32_t LL_RCC_GetSDADCClockFreq(uint32_t SDADCxSource)
{
uint32_t sdadc_prescaler = 0U;
uint32_t sdadc_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
/* Check parameter */
assert_param(IS_LL_RCC_SDADC_CLKSOURCE(SDADCxSource));
/* Get SDADC prescaler */
sdadc_prescaler = LL_RCC_GetSDADCClockSource(SDADCxSource);
/* SDADC frequency = SYSTEM frequency / SDADC prescaler (from 2 to 48) */
sdadc_frequency = RCC_GetSystemClockFreq()
/ (aSDADCPrescTable[(sdadc_prescaler >> POSITION_VAL(SDADCxSource)) & 0xFU]);
return sdadc_frequency;
}
#endif /*RCC_CFGR_SDPRE */
#if defined(CEC)
/**
* @brief Return CECx clock frequency
* @param CECxSource This parameter can be one of the following values:
* @arg @ref LL_RCC_CEC_CLKSOURCE
* @retval CEC clock frequency (in Hz)
* @arg @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillators (HSI or LSE) are not ready
*/
uint32_t LL_RCC_GetCECClockFreq(uint32_t CECxSource)
{
uint32_t cec_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
/* Check parameter */
assert_param(IS_LL_RCC_CEC_CLKSOURCE(CECxSource));
/* CECCLK clock frequency */
switch (LL_RCC_GetCECClockSource(CECxSource))
{
case LL_RCC_CEC_CLKSOURCE_HSI_DIV244: /* HSI / 244 clock used as CEC clock source */
if (LL_RCC_HSI_IsReady())
{
cec_frequency = HSI_VALUE / 244U;
}
break;
case LL_RCC_CEC_CLKSOURCE_LSE: /* LSE clock used as CEC clock source */
default:
if (LL_RCC_LSE_IsReady())
{
cec_frequency = LSE_VALUE;
}
break;
}
return cec_frequency;
}
#endif /* CEC */
#if defined(RCC_CFGR3_TIMSW)
/**
* @brief Return TIMx clock frequency
* @param TIMxSource This parameter can be one of the following values:
* @arg @ref LL_RCC_TIM1_CLKSOURCE
* @arg @ref LL_RCC_TIM8_CLKSOURCE (*)
* @arg @ref LL_RCC_TIM15_CLKSOURCE (*)
* @arg @ref LL_RCC_TIM16_CLKSOURCE (*)
* @arg @ref LL_RCC_TIM17_CLKSOURCE (*)
* @arg @ref LL_RCC_TIM20_CLKSOURCE (*)
* @arg @ref LL_RCC_TIM2_CLKSOURCE (*)
* @arg @ref LL_RCC_TIM34_CLKSOURCE (*)
*
* (*) value not defined in all devices
* @retval TIM clock frequency (in Hz)
*/
uint32_t LL_RCC_GetTIMClockFreq(uint32_t TIMxSource)
{
uint32_t tim_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
/* Check parameter */
assert_param(IS_LL_RCC_TIM_CLKSOURCE(TIMxSource));
if (TIMxSource == LL_RCC_TIM1_CLKSOURCE)
{
/* TIM1CLK clock frequency */
if (LL_RCC_GetTIMClockSource(LL_RCC_TIM1_CLKSOURCE) == LL_RCC_TIM1_CLKSOURCE_PCLK2)
{
/* PCLK2 used as TIM1 clock source */
tim_frequency = RCC_GetPCLK2ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
}
else /* LL_RCC_TIM1_CLKSOURCE_PLL */
{
/* PLL clock used as TIM1 clock source */
tim_frequency = RCC_PLL_GetFreqDomain_SYS();
}
}
#if defined(RCC_CFGR3_TIM8SW)
if (TIMxSource == LL_RCC_TIM8_CLKSOURCE)
{
/* TIM8CLK clock frequency */
if (LL_RCC_GetTIMClockSource(LL_RCC_TIM8_CLKSOURCE) == LL_RCC_TIM8_CLKSOURCE_PCLK2)
{
/* PCLK2 used as TIM8 clock source */
tim_frequency = RCC_GetPCLK2ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
}
else /* LL_RCC_TIM8_CLKSOURCE_PLL */
{
/* PLL clock used as TIM8 clock source */
tim_frequency = RCC_PLL_GetFreqDomain_SYS();
}
}
#endif /*RCC_CFGR3_TIM8SW*/
#if defined(RCC_CFGR3_TIM15SW)
if (TIMxSource == LL_RCC_TIM15_CLKSOURCE)
{
/* TIM15CLK clock frequency */
if (LL_RCC_GetTIMClockSource(LL_RCC_TIM15_CLKSOURCE) == LL_RCC_TIM15_CLKSOURCE_PCLK2)
{
/* PCLK2 used as TIM15 clock source */
tim_frequency = RCC_GetPCLK2ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
}
else /* LL_RCC_TIM15_CLKSOURCE_PLL */
{
/* PLL clock used as TIM15 clock source */
tim_frequency = RCC_PLL_GetFreqDomain_SYS();
}
}
#endif /*RCC_CFGR3_TIM15SW*/
#if defined(RCC_CFGR3_TIM16SW)
if (TIMxSource == LL_RCC_TIM16_CLKSOURCE)
{
/* TIM16CLK clock frequency */
if (LL_RCC_GetTIMClockSource(LL_RCC_TIM16_CLKSOURCE) == LL_RCC_TIM16_CLKSOURCE_PCLK2)
{
/* PCLK2 used as TIM16 clock source */
tim_frequency = RCC_GetPCLK2ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
}
else /* LL_RCC_TIM16_CLKSOURCE_PLL */
{
/* PLL clock used as TIM16 clock source */
tim_frequency = RCC_PLL_GetFreqDomain_SYS();
}
}
#endif /*RCC_CFGR3_TIM16SW*/
#if defined(RCC_CFGR3_TIM17SW)
if (TIMxSource == LL_RCC_TIM17_CLKSOURCE)
{
/* TIM17CLK clock frequency */
if (LL_RCC_GetTIMClockSource(LL_RCC_TIM17_CLKSOURCE) == LL_RCC_TIM17_CLKSOURCE_PCLK2)
{
/* PCLK2 used as TIM17 clock source */
tim_frequency = RCC_GetPCLK2ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
}
else /* LL_RCC_TIM17_CLKSOURCE_PLL */
{
/* PLL clock used as TIM17 clock source */
tim_frequency = RCC_PLL_GetFreqDomain_SYS();
}
}
#endif /*RCC_CFGR3_TIM17SW*/
#if defined(RCC_CFGR3_TIM20SW)
if (TIMxSource == LL_RCC_TIM20_CLKSOURCE)
{
/* TIM20CLK clock frequency */
if (LL_RCC_GetTIMClockSource(LL_RCC_TIM20_CLKSOURCE) == LL_RCC_TIM20_CLKSOURCE_PCLK2)
{
/* PCLK2 used as TIM20 clock source */
tim_frequency = RCC_GetPCLK2ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
}
else /* LL_RCC_TIM20_CLKSOURCE_PLL */
{
/* PLL clock used as TIM20 clock source */
tim_frequency = RCC_PLL_GetFreqDomain_SYS();
}
}
#endif /*RCC_CFGR3_TIM20SW*/
#if defined(RCC_CFGR3_TIM2SW)
if (TIMxSource == LL_RCC_TIM2_CLKSOURCE)
{
/* TIM2CLK clock frequency */
if (LL_RCC_GetTIMClockSource(LL_RCC_TIM2_CLKSOURCE) == LL_RCC_TIM2_CLKSOURCE_PCLK1)
{
/* PCLK1 used as TIM2 clock source */
tim_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
}
else /* LL_RCC_TIM2_CLKSOURCE_PLL */
{
/* PLL clock used as TIM2 clock source */
tim_frequency = RCC_PLL_GetFreqDomain_SYS();
}
}
#endif /*RCC_CFGR3_TIM2SW*/
#if defined(RCC_CFGR3_TIM34SW)
if (TIMxSource == LL_RCC_TIM34_CLKSOURCE)
{
/* TIM3/4 CLK clock frequency */
if (LL_RCC_GetTIMClockSource(LL_RCC_TIM34_CLKSOURCE) == LL_RCC_TIM34_CLKSOURCE_PCLK1)
{
/* PCLK1 used as TIM3/4 clock source */
tim_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
}
else /* LL_RCC_TIM34_CLKSOURCE_PLL */
{
/* PLL clock used as TIM3/4 clock source */
tim_frequency = RCC_PLL_GetFreqDomain_SYS();
}
}
#endif /*RCC_CFGR3_TIM34SW*/
return tim_frequency;
}
#endif /*RCC_CFGR3_TIMSW*/
#if defined(HRTIM1)
/**
* @brief Return HRTIMx clock frequency
* @param HRTIMxSource This parameter can be one of the following values:
* @arg @ref LL_RCC_HRTIM1_CLKSOURCE
* @retval HRTIM clock frequency (in Hz)
*/
uint32_t LL_RCC_GetHRTIMClockFreq(uint32_t HRTIMxSource)
{
uint32_t hrtim_frequency = LL_RCC_PERIPH_FREQUENCY_NO;
/* Check parameter */
assert_param(IS_LL_RCC_HRTIM_CLKSOURCE(HRTIMxSource));
/* HRTIM1CLK clock frequency */
if (LL_RCC_GetHRTIMClockSource(LL_RCC_HRTIM1_CLKSOURCE) == LL_RCC_HRTIM1_CLKSOURCE_PCLK2)
{
/* PCLK2 used as HRTIM1 clock source */
hrtim_frequency = RCC_GetPCLK2ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq()));
}
else /* LL_RCC_HRTIM1_CLKSOURCE_PLL */
{
/* PLL clock used as HRTIM1 clock source */
hrtim_frequency = RCC_PLL_GetFreqDomain_SYS();
}
return hrtim_frequency;
}
#endif /* HRTIM1 */
/**
* @}
*/
/**
* @}
*/
/** @addtogroup RCC_LL_Private_Functions
* @{
*/
/**
* @brief Return SYSTEM clock frequency
* @retval SYSTEM clock frequency (in Hz)
*/
uint32_t RCC_GetSystemClockFreq(void)
{
uint32_t frequency = 0U;
/* Get SYSCLK source -------------------------------------------------------*/
switch (LL_RCC_GetSysClkSource())
{
case LL_RCC_SYS_CLKSOURCE_STATUS_HSI: /* HSI used as system clock source */
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 = HSI_VALUE;
break;
}
return frequency;
}
/**
* @brief Return HCLK clock frequency
* @param SYSCLK_Frequency SYSCLK clock frequency
* @retval HCLK clock frequency (in Hz)
*/
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)
*/
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)
*/
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)
*/
uint32_t RCC_PLL_GetFreqDomain_SYS(void)
{
uint32_t pllinputfreq = 0U, pllsource = 0U;
/* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLL divider) * PLL Multiplicator */
/* Get PLL source */
pllsource = LL_RCC_PLL_GetMainSource();
switch (pllsource)
{
#if defined(RCC_PLLSRC_PREDIV1_SUPPORT)
case LL_RCC_PLLSOURCE_HSI: /* HSI used as PLL clock source */
pllinputfreq = HSI_VALUE;
#else
case LL_RCC_PLLSOURCE_HSI_DIV_2: /* HSI used as PLL clock source */
pllinputfreq = HSI_VALUE / 2U;
#endif /* RCC_PLLSRC_PREDIV1_SUPPORT */
break;
case LL_RCC_PLLSOURCE_HSE: /* HSE used as PLL clock source */
pllinputfreq = HSE_VALUE;
break;
default:
#if defined(RCC_PLLSRC_PREDIV1_SUPPORT)
pllinputfreq = HSI_VALUE;
#else
pllinputfreq = HSI_VALUE / 2U;
#endif /* RCC_PLLSRC_PREDIV1_SUPPORT */
break;
}
#if defined(RCC_PLLSRC_PREDIV1_SUPPORT)
return __LL_RCC_CALC_PLLCLK_FREQ(pllinputfreq, LL_RCC_PLL_GetMultiplicator(), LL_RCC_PLL_GetPrediv());
#else
return __LL_RCC_CALC_PLLCLK_FREQ((pllinputfreq / (LL_RCC_PLL_GetPrediv() + 1U)), LL_RCC_PLL_GetMultiplicator());
#endif /* RCC_PLLSRC_PREDIV1_SUPPORT */
}
/**
* @}
*/
/**
* @}
*/
#endif /* defined(RCC) */
/**
* @}
*/
#endif /* USE_FULL_LL_DRIVER */