/** | |
****************************************************************************** | |
* @file stm32l0xx_ll_rcc.c | |
* @author MCD Application Team | |
* @brief RCC LL module driver. | |
****************************************************************************** | |
* @attention | |
* | |
* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> | |
* | |
* Redistribution and use in source and binary forms, with or without modification, | |
* are permitted provided that the following conditions are met: | |
* 1. Redistributions of source code must retain the above copyright notice, | |
* this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright notice, | |
* this list of conditions and the following disclaimer in the documentation | |
* and/or other materials provided with the distribution. | |
* 3. Neither the name of STMicroelectronics nor the names of its contributors | |
* may be used to endorse or promote products derived from this software | |
* without specific prior written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE | |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
* | |
****************************************************************************** | |
*/ | |
#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 | |
* @{ | |
*/ | |
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: | |
* - 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) | |
{ | |
uint32_t vl_mask = 0U; | |
/* 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, 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)); | |
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); | |
/* Reset CFGR register */ | |
LL_RCC_WriteReg(CFGR, 0x00000000U); | |
#if defined(RCC_HSI48_SUPPORT) | |
/* Reset CRRCR register */ | |
LL_RCC_WriteReg(CRRCR, 0x00000000U); | |
/* Disable HSI48 */ | |
LL_RCC_HSI48_Disable(); | |
#endif /*RCC_HSI48_SUPPORT*/ | |
/* Disable all interrupts */ | |
LL_RCC_WriteReg(CIER, 0x00000000U); | |
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()) | |
{ | |
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; | |
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()) | |
{ | |
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_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()) | |
{ | |
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()) | |
{ | |
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()) | |
{ | |
lpuart_frequency = HSI_VALUE; | |
} | |
break; | |
case LL_RCC_LPUART1_CLKSOURCE_LSE: /* LPUART1 Clock is LSE Osc. */ | |
if (LL_RCC_LSE_IsReady()) | |
{ | |
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()) | |
{ | |
lptim_frequency = LSI_VALUE; | |
} | |
break; | |
case LL_RCC_LPTIM1_CLKSOURCE_HSI: /* LPTIM1 Clock is HSI Osc. */ | |
if (LL_RCC_HSI_IsReady()) | |
{ | |
lptim_frequency = HSI_VALUE; | |
} | |
break; | |
case LL_RCC_LPTIM1_CLKSOURCE_LSE: /* LPTIM1 Clock is LSE Osc. */ | |
if (LL_RCC_LSE_IsReady()) | |
{ | |
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()) | |
{ | |
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()) | |
{ | |
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) | |
*/ | |
uint32_t RCC_GetSystemClockFreq(void) | |
{ | |
uint32_t frequency = 0U; | |
/* 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 */ | |
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) | |
*/ | |
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) | |
{ | |
case LL_RCC_PLLSOURCE_HSI: /* HSI used as PLL clock source */ | |
pllinputfreq = HSI_VALUE; | |
break; | |
case LL_RCC_PLLSOURCE_HSE: /* HSE used as PLL clock source */ | |
pllinputfreq = HSE_VALUE; | |
break; | |
default: | |
pllinputfreq = HSI_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 */ | |
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |