/** ****************************************************************************** * @file stm32g0xx_ll_rcc.c * @author MCD Application Team * @brief RCC LL module driver. ****************************************************************************** * @attention * *

© Copyright (c) 2018 STMicroelectronics. * All rights reserved.

* * This software component is licensed by ST under BSD 3-Clause license, * the "License"; You may not use this file except in compliance with the * License. You may obtain a copy of the License at: * opensource.org/licenses/BSD-3-Clause * ****************************************************************************** */ #if defined(USE_FULL_LL_DRIVER) /* Includes ------------------------------------------------------------------*/ #include "stm32g0xx_ll_rcc.h" #ifdef USE_FULL_ASSERT #include "stm32_assert.h" #else #define assert_param(expr) ((void)0U) #endif /** @addtogroup STM32G0xx_LL_Driver * @{ */ #if defined(RCC) /** @addtogroup RCC_LL * @{ */ /* Private types -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private constants ---------------------------------------------------------*/ /* Private macros ------------------------------------------------------------*/ /** @addtogroup RCC_LL_Private_Macros * @{ */ #if defined(STM32G081xx) || defined(STM32G071xx) || defined(STM32G070xx) #define IS_LL_RCC_USART_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_USART1_CLKSOURCE) \ || ((__VALUE__) == LL_RCC_USART2_CLKSOURCE)) #elif defined(STM32G041xx) || defined(STM32G031xx) || defined(STM32G030xx) #define IS_LL_RCC_USART_CLKSOURCE(__VALUE__) ((__VALUE__) == LL_RCC_USART1_CLKSOURCE) #endif #if defined(LPUART1) #define IS_LL_RCC_LPUART_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_LPUART1_CLKSOURCE)) #endif #define IS_LL_RCC_I2C_CLKSOURCE(__VALUE__) ((__VALUE__) == LL_RCC_I2C1_CLKSOURCE) #if defined(LPTIM1) || defined(LPTIM2) #define IS_LL_RCC_LPTIM_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_LPTIM1_CLKSOURCE) \ || ((__VALUE__) == LL_RCC_LPTIM2_CLKSOURCE)) #endif #if defined(RNG) #define IS_LL_RCC_RNG_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_RNG_CLKSOURCE)) #endif #define IS_LL_RCC_ADC_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_ADC_CLKSOURCE)) #define IS_LL_RCC_I2S_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_I2S1_CLKSOURCE)) #if defined(CEC) #define IS_LL_RCC_CEC_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_CEC_CLKSOURCE)) #endif #if defined(RCC_CCIPR_TIM1SEL) && defined(RCC_CCIPR_TIM15SEL) #define IS_LL_RCC_TIM_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_TIM1_CLKSOURCE) \ || ((__VALUE__) == LL_RCC_TIM15_CLKSOURCE)) #elif defined(RCC_CCIPR_TIM1SEL) #define IS_LL_RCC_TIM_CLKSOURCE(__VALUE__) (((__VALUE__) == LL_RCC_TIM1_CLKSOURCE)) #endif /** * @} */ /* 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_PLL_GetFreqDomain_SYS(void); uint32_t RCC_PLL_GetFreqDomain_ADC(void); uint32_t RCC_PLL_GetFreqDomain_I2S1(void); uint32_t RCC_PLL_GetFreqDomain_RNG(void); uint32_t RCC_PLL_GetFreqDomain_TIM1(void); uint32_t RCC_PLL_GetFreqDomain_TIM15(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 and APB1 prescaler set to 1. * - CSS, MCO OFF * - All interrupts disabled * @note This function does not 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) { /* Set HSION bit and wait for HSI READY bit */ LL_RCC_HSI_Enable(); while (LL_RCC_HSI_IsReady() != 1U) {} /* Set HSITRIM bits to reset value*/ LL_RCC_HSI_SetCalibTrimming(0x40U); /* Reset CFGR register */ LL_RCC_WriteReg(CFGR, 0x00000000U); /* Reset whole CR register but HSI in 2 steps in case HSEBYP is set */ LL_RCC_WriteReg(CR, RCC_CR_HSION); while (LL_RCC_HSE_IsReady() != 0U) {} LL_RCC_WriteReg(CR, RCC_CR_HSION); /* Wait for PLL READY bit to be reset */ while (LL_RCC_PLL_IsReady() != 0U) {} /* Reset PLLCFGR register */ LL_RCC_WriteReg(PLLCFGR, 16U << RCC_PLLCFGR_PLLN_Pos); /* Disable all interrupts */ LL_RCC_WriteReg(CIER, 0x00000000U); /* Clear all interrupts flags */ LL_RCC_WriteReg(CICR, 0xFFFFFFFFU); return SUCCESS; } /** * @} */ /** @addtogroup RCC_LL_EF_Get_Freq * @brief Return the frequencies of different on chip clocks; System, AHB and APB1 buses clocks * and different peripheral clocks available on the device. * @note If SYSCLK source is HSI, function returns values based on HSI_VALUE divided by HSI division factor(**) * @note If SYSCLK source is HSE, function returns values based on HSE_VALUE(***) * @note If SYSCLK source is PLL, function returns values based on HSE_VALUE(***) * or HSI_VALUE(**) multiplied/divided by the PLL factors. * @note (**) HSI_VALUE is a constant defined in this file (default value * 16 MHz) but the real value may vary depending on the variations * in voltage and temperature. * @note (***) HSE_VALUE is a constant defined in this file (default value * 8 MHz), 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 and APB1 buses clocks * @note Each time SYSCLK, HCLK and/or PCLK1 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); } /** * @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 * @retval USART clock frequency (in Hz) * - @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 (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() == 1U) { usart_frequency = HSI_VALUE; } break; case LL_RCC_USART1_CLKSOURCE_LSE: /* USART1 Clock is LSE Osc. */ if (LL_RCC_LSE_IsReady() == 1U) { usart_frequency = LSE_VALUE; } break; case LL_RCC_USART1_CLKSOURCE_PCLK1: /* USART1 Clock is PCLK1 */ default: usart_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq())); break; } } #if defined(RCC_CCIPR_USART2SEL) else 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() == 1U) { usart_frequency = HSI_VALUE; } break; case LL_RCC_USART2_CLKSOURCE_LSE: /* USART2 Clock is LSE Osc. */ if (LL_RCC_LSE_IsReady() == 1U) { 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 else { } 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 * @retval I2C clock frequency (in Hz) * - @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)); if (I2CxSource == LL_RCC_I2C1_CLKSOURCE) { /* I2C1 CLK clock frequency */ 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() == 1U) { 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; } } else { } return i2c_frequency; } /** * @brief Return I2Sx clock frequency * @param I2SxSource This parameter can be one of the following values: * @arg @ref LL_RCC_I2S1_CLKSOURCE * @retval I2S clock frequency (in Hz) * @arg @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator is not ready */ 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)); if (I2SxSource == LL_RCC_I2S1_CLKSOURCE) { /* I2S1 CLK clock frequency */ switch (LL_RCC_GetI2SClockSource(I2SxSource)) { case LL_RCC_I2S1_CLKSOURCE_HSI: /* I2S1 Clock is HSI */ i2s_frequency = HSI_VALUE; break; case LL_RCC_I2S1_CLKSOURCE_PLL: /* I2S1 Clock is PLL"P" */ if (LL_RCC_PLL_IsReady() == 1U) { i2s_frequency = RCC_PLL_GetFreqDomain_I2S1(); } break; case LL_RCC_I2S1_CLKSOURCE_PIN: /* I2S1 Clock is External clock */ i2s_frequency = EXTERNAL_CLOCK_VALUE; break; case LL_RCC_I2S1_CLKSOURCE_SYSCLK: /* I2S1 Clock is System Clock */ default: i2s_frequency = RCC_GetSystemClockFreq(); break; } } return i2s_frequency; } #if defined(LPUART1) /** * @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() == 1U) { lpuart_frequency = HSI_VALUE; } break; case LL_RCC_LPUART1_CLKSOURCE_LSE: /* LPUART1 Clock is LSE Osc. */ if (LL_RCC_LSE_IsReady() == 1U) { 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; } #endif /* LPUART1 */ #if defined(LPTIM1) && defined(LPTIM2) /** * @brief Return LPTIMx clock frequency * @param LPTIMxSource This parameter can be one of the following values: * @arg @ref LL_RCC_LPTIM1_CLKSOURCE * @arg @ref LL_RCC_LPTIM2_CLKSOURCE * @retval LPTIM clock frequency (in Hz) * - @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI, LSI 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() == 1U) { lptim_frequency = LSI_VALUE; } break; case LL_RCC_LPTIM1_CLKSOURCE_HSI: /* LPTIM1 Clock is HSI Osc. */ if (LL_RCC_HSI_IsReady() == 1U) { lptim_frequency = HSI_VALUE; } break; case LL_RCC_LPTIM1_CLKSOURCE_LSE: /* LPTIM1 Clock is LSE Osc. */ if (LL_RCC_LSE_IsReady() == 1U) { 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; } } else { /* LPTIM2CLK clock frequency */ switch (LL_RCC_GetLPTIMClockSource(LPTIMxSource)) { case LL_RCC_LPTIM2_CLKSOURCE_LSI: /* LPTIM2 Clock is LSI Osc. */ if (LL_RCC_LSI_IsReady() == 1U) { lptim_frequency = LSI_VALUE; } break; case LL_RCC_LPTIM2_CLKSOURCE_HSI: /* LPTIM2 Clock is HSI Osc. */ if (LL_RCC_HSI_IsReady() == 1U) { lptim_frequency = HSI_VALUE; } break; case LL_RCC_LPTIM2_CLKSOURCE_LSE: /* LPTIM2 Clock is LSE Osc. */ if (LL_RCC_LSE_IsReady() == 1U) { lptim_frequency = LSE_VALUE; } break; case LL_RCC_LPTIM2_CLKSOURCE_PCLK1: /* LPTIM2 Clock is PCLK1 */ default: lptim_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq())); break; } } return lptim_frequency; } #endif /* LPTIM1 && LPTIM2 */ #if defined(RCC_CCIPR_TIM1SEL) || defined(RCC_CCIPR_TIM15SEL) /** * @brief Return TIMx clock frequency * @param TIMxSource This parameter can be one of the following values: * @arg @ref LL_RCC_TIM1_CLKSOURCE * @if defined(STM32G081xx) * @arg @ref LL_RCC_TIM15_CLKSOURCE * @endif * @retval TIMx clock frequency (in Hz) * - @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI or LSE) is not ready */ 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 */ switch (LL_RCC_GetTIMClockSource(TIMxSource)) { case LL_RCC_TIM1_CLKSOURCE_PLL: /* TIM1 Clock is PLLQ */ if (LL_RCC_PLL_IsReady() == 1U) { tim_frequency = RCC_PLL_GetFreqDomain_TIM1(); } break; case LL_RCC_TIM1_CLKSOURCE_PCLK1: /* TIM1 Clock is PCLK1 */ default: tim_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq())); break; } } #if defined(TIM15) else { if (TIMxSource == LL_RCC_TIM15_CLKSOURCE) { /* TIM15CLK clock frequency */ switch (LL_RCC_GetTIMClockSource(TIMxSource)) { case LL_RCC_TIM15_CLKSOURCE_PLL: /* TIM1 Clock is PLLQ */ if (LL_RCC_PLL_IsReady() == 1U) { tim_frequency = RCC_PLL_GetFreqDomain_TIM15(); } break; case LL_RCC_TIM15_CLKSOURCE_PCLK1: /* TIM15 Clock is PCLK1 */ default: tim_frequency = RCC_GetPCLK1ClockFreq(RCC_GetHCLKClockFreq(RCC_GetSystemClockFreq())); break; } } } #endif return tim_frequency; } #endif /* RCC_CCIPR_TIM1SEL && RCC_CCIPR_TIM15SEL */ #if defined(RNG) /** * @brief Return RNGx clock frequency * @param RNGxSource This parameter can be one of the following values: * @arg @ref LL_RCC_RNG_CLKSOURCE * @retval RNG clock frequency (in Hz) * - @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI) or PLL is not ready * - @ref LL_RCC_PERIPH_FREQUENCY_NA indicates that no clock source selected */ uint32_t LL_RCC_GetRNGClockFreq(uint32_t RNGxSource) { uint32_t rng_frequency = LL_RCC_PERIPH_FREQUENCY_NO; uint32_t rngdiv; /* Check parameter */ assert_param(IS_LL_RCC_RNG_CLKSOURCE(RNGxSource)); /* RNGCLK clock frequency */ switch (LL_RCC_GetRNGClockSource(RNGxSource)) { case LL_RCC_RNG_CLKSOURCE_PLL: /* PLL clock used as RNG clock source */ if (LL_RCC_PLL_IsReady() == 1U) { rng_frequency = RCC_PLL_GetFreqDomain_RNG(); rngdiv = (1UL << ((READ_BIT(RCC->CCIPR, RCC_CCIPR_RNGDIV)) >> RCC_CCIPR_RNGDIV_Pos)); rng_frequency = (rng_frequency / rngdiv); } break; case LL_RCC_RNG_CLKSOURCE_HSI_DIV8: /* HSI clock divided by 8 used as RNG clock source */ rng_frequency = HSI_VALUE / 8U; rngdiv = (1UL << ((READ_BIT(RCC->CCIPR, RCC_CCIPR_RNGDIV)) >> RCC_CCIPR_RNGDIV_Pos)); rng_frequency = (rng_frequency / rngdiv); break; case LL_RCC_RNG_CLKSOURCE_SYSCLK: /* SYSCLK clock used as RNG clock source */ rng_frequency = RCC_GetSystemClockFreq(); rngdiv = (1UL << ((READ_BIT(RCC->CCIPR, RCC_CCIPR_RNGDIV)) >> RCC_CCIPR_RNGDIV_Pos)); rng_frequency = (rng_frequency / rngdiv); break; case LL_RCC_RNG_CLKSOURCE_NONE: /* No clock used as RNG clock source */ default: rng_frequency = LL_RCC_PERIPH_FREQUENCY_NA; break; } return rng_frequency; } #endif /* RNG */ #if defined(CEC) /** * @brief Return CEC 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) * - @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI or LSE) is 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_LSE: /* CEC Clock is LSE Osc. */ if (LL_RCC_LSE_IsReady() == 1U) { cec_frequency = LSE_VALUE; } break; case LL_RCC_CEC_CLKSOURCE_HSI_DIV488: /* CEC Clock is HSI Osc. */ default: if (LL_RCC_HSI_IsReady() == 1U) { cec_frequency = (HSI_VALUE / 488U); } break; } return cec_frequency; } #endif /* CEC */ /** * @brief Return ADCx clock frequency * @param ADCxSource This parameter can be one of the following values: * @arg @ref LL_RCC_ADC_CLKSOURCE * @retval ADC clock frequency (in Hz) * - @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillator (HSI) or PLL is not ready * - @ref LL_RCC_PERIPH_FREQUENCY_NA indicates that no clock source selected */ uint32_t LL_RCC_GetADCClockFreq(uint32_t ADCxSource) { uint32_t adc_frequency = LL_RCC_PERIPH_FREQUENCY_NO; /* Check parameter */ assert_param(IS_LL_RCC_ADC_CLKSOURCE(ADCxSource)); /* ADCCLK clock frequency */ switch (LL_RCC_GetADCClockSource(ADCxSource)) { case LL_RCC_ADC_CLKSOURCE_SYSCLK: /* SYSCLK clock used as ADC clock source */ adc_frequency = RCC_GetSystemClockFreq(); break; case LL_RCC_ADC_CLKSOURCE_HSI : /* HSI clock used as ADC clock source */ adc_frequency = HSI_VALUE; break; case LL_RCC_ADC_CLKSOURCE_PLL: /* PLLP clock used as ADC clock source */ if (LL_RCC_PLL_IsReady() == 1U) { adc_frequency = RCC_PLL_GetFreqDomain_ADC(); } break; default: adc_frequency = LL_RCC_PERIPH_FREQUENCY_NA; break; } return adc_frequency; } /** * @brief Return RTC clock frequency * @retval RTC clock frequency (in Hz) * - @ref LL_RCC_PERIPH_FREQUENCY_NO indicates that oscillators (LSI, LSE or HSE) are not ready * - @ref LL_RCC_PERIPH_FREQUENCY_NA indicates that no clock source selected */ uint32_t LL_RCC_GetRTCClockFreq(void) { uint32_t rtc_frequency = LL_RCC_PERIPH_FREQUENCY_NO; /* RTCCLK clock frequency */ switch (LL_RCC_GetRTCClockSource()) { case LL_RCC_RTC_CLKSOURCE_LSE: /* LSE clock used as RTC clock source */ if (LL_RCC_LSE_IsReady() == 1U) { rtc_frequency = LSE_VALUE; } break; case LL_RCC_RTC_CLKSOURCE_LSI: /* LSI clock used as RTC clock source */ if (LL_RCC_LSI_IsReady() == 1U) { rtc_frequency = LSI_VALUE; } break; case LL_RCC_RTC_CLKSOURCE_HSE_DIV32: /* HSE clock used as ADC clock source */ rtc_frequency = HSE_VALUE / 32U; break; case LL_RCC_RTC_CLKSOURCE_NONE: /* No clock used as RTC clock source */ default: rtc_frequency = LL_RCC_PERIPH_FREQUENCY_NA; break; } return rtc_frequency; } /** * @} */ /** * @} */ /** @addtogroup RCC_LL_Private_Functions * @{ */ /** * @brief Return SYSTEM clock frequency * @retval SYSTEM clock frequency (in Hz) */ uint32_t RCC_GetSystemClockFreq(void) { uint32_t frequency; uint32_t hsidiv; /* Get SYSCLK source -------------------------------------------------------*/ switch (LL_RCC_GetSysClkSource()) { 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; case LL_RCC_SYS_CLKSOURCE_STATUS_HSI: /* HSI used as system clock source */ default: hsidiv = (1UL << ((READ_BIT(RCC->CR, RCC_CR_HSIDIV)) >> RCC_CR_HSIDIV_Pos)); frequency = (HSI_VALUE / hsidiv); 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 PLL clock frequency used for system domain * @retval PLL clock frequency (in Hz) */ uint32_t RCC_PLL_GetFreqDomain_SYS(void) { uint32_t pllinputfreq, pllsource; /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLLM) * PLLN SYSCLK = PLL_VCO / PLLR */ 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_GetDivider(), LL_RCC_PLL_GetN(), LL_RCC_PLL_GetR()); } /** * @brief Return PLL clock frequency used for ADC domain * @retval PLL clock frequency (in Hz) */ uint32_t RCC_PLL_GetFreqDomain_ADC(void) { uint32_t pllinputfreq, pllsource; /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLLM) * PLLN ADC Domain clock = PLL_VCO / PLLP */ pllsource = LL_RCC_PLL_GetMainSource(); switch (pllsource) { case LL_RCC_PLLSOURCE_HSE: /* HSE used as PLL clock source */ pllinputfreq = HSE_VALUE; break; case LL_RCC_PLLSOURCE_HSI: /* HSI used as PLL clock source */ default: pllinputfreq = HSI_VALUE; break; } return __LL_RCC_CALC_PLLCLK_ADC_FREQ(pllinputfreq, LL_RCC_PLL_GetDivider(), LL_RCC_PLL_GetN(), LL_RCC_PLL_GetP()); } /** * @brief Return PLL clock frequency used for I2S1 domain * @retval PLL clock frequency (in Hz) */ uint32_t RCC_PLL_GetFreqDomain_I2S1(void) { uint32_t pllinputfreq, pllsource; /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLLM) * PLLN I2S1 Domain clock = PLL_VCO / PLLP */ pllsource = LL_RCC_PLL_GetMainSource(); switch (pllsource) { case LL_RCC_PLLSOURCE_HSE: /* HSE used as PLL clock source */ pllinputfreq = HSE_VALUE; break; case LL_RCC_PLLSOURCE_HSI: /* HSI used as PLL clock source */ default: pllinputfreq = HSI_VALUE; break; } return __LL_RCC_CALC_PLLCLK_I2S1_FREQ(pllinputfreq, LL_RCC_PLL_GetDivider(), LL_RCC_PLL_GetN(), LL_RCC_PLL_GetP()); } #if defined(RNG) /** * @brief Return PLL clock frequency used for RNG domain * @retval PLL clock frequency (in Hz) */ uint32_t RCC_PLL_GetFreqDomain_RNG(void) { uint32_t pllinputfreq, pllsource; /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLLM ) * PLLN RNG Domain clock = PLL_VCO / PLLQ */ pllsource = LL_RCC_PLL_GetMainSource(); switch (pllsource) { case LL_RCC_PLLSOURCE_HSE: /* HSE used as PLL clock source */ pllinputfreq = HSE_VALUE; break; case LL_RCC_PLLSOURCE_HSI: /* HSI used as PLL clock source */ default: pllinputfreq = HSI_VALUE; break; } return __LL_RCC_CALC_PLLCLK_RNG_FREQ(pllinputfreq, LL_RCC_PLL_GetDivider(), LL_RCC_PLL_GetN(), LL_RCC_PLL_GetQ()); } #endif /* RNG */ #if defined(RCC_PLLQ_SUPPORT) /** * @brief Return PLL clock frequency used for TIM1 domain * @retval PLL clock frequency (in Hz) */ uint32_t RCC_PLL_GetFreqDomain_TIM1(void) { uint32_t pllinputfreq, pllsource; /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLLM ) * PLLN TIM1 Domain clock = PLL_VCO / PLLQ */ pllsource = LL_RCC_PLL_GetMainSource(); switch (pllsource) { case LL_RCC_PLLSOURCE_HSE: /* HSE used as PLL clock source */ pllinputfreq = HSE_VALUE; break; case LL_RCC_PLLSOURCE_HSI: /* HSI used as PLL clock source */ default: pllinputfreq = HSI_VALUE; break; } return __LL_RCC_CALC_PLLCLK_TIM1_FREQ(pllinputfreq, LL_RCC_PLL_GetDivider(), LL_RCC_PLL_GetN(), LL_RCC_PLL_GetQ()); } #endif /* RCC_PLLQ_SUPPORT */ #if defined(RCC_PLLQ_SUPPORT) && defined(TIM15) /** * @brief Return PLL clock frequency used for TIM15 domain * @retval PLL clock frequency (in Hz) */ uint32_t RCC_PLL_GetFreqDomain_TIM15(void) { uint32_t pllinputfreq, pllsource; /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLLM ) * PLLN TIM15 Domain clock = PLL_VCO / PLLQ */ pllsource = LL_RCC_PLL_GetMainSource(); switch (pllsource) { case LL_RCC_PLLSOURCE_HSE: /* HSE used as PLL clock source */ pllinputfreq = HSE_VALUE; break; case LL_RCC_PLLSOURCE_HSI: /* HSI used as PLL clock source */ default: pllinputfreq = HSI_VALUE; break; } return __LL_RCC_CALC_PLLCLK_TIM15_FREQ(pllinputfreq, LL_RCC_PLL_GetDivider(), LL_RCC_PLL_GetN(), LL_RCC_PLL_GetQ()); } #endif /* RCC_PLLQ_SUPPORT && TIM15 */ /** * @} */ /** * @} */ #endif /* defined(RCC) */ /** * @} */ #endif /* USE_FULL_LL_DRIVER */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/