/** * @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 PLLSAI2 clock frequency used for ADC domain * @retval PLLSAI2 clock frequency (in Hz) */ uint32_t RCC_PLLSAI2_GetFreqDomain_ADC(void) { uint32_t pllinputfreq = 0, pllsource = 0; /* PLLSAI2_VCO = (HSE_VALUE or HSI_VALUE or MSI_VALUE/ PLLM) * PLLSAI2N 48M Domain clock = PLLSAI2_VCO / PLLSAI2R */ pllsource = LL_RCC_PLL_GetMainSource(); switch (pllsource) { case LL_RCC_PLLSOURCE_MSI: /* MSI used as PLLSAI2 clock source */ pllinputfreq = __LL_RCC_CALC_MSI_FREQ(LL_RCC_MSI_IsEnabledRangeSelect(), (LL_RCC_MSI_IsEnabledRangeSelect() ? LL_RCC_MSI_GetRange() : LL_RCC_MSI_GetRangeAfterStandby())); break; case LL_RCC_PLLSOURCE_HSI: /* HSI used as PLLSAI2 clock source */ pllinputfreq = HSI_VALUE; break; case LL_RCC_PLLSOURCE_HSE: /* HSE used as PLLSAI2 clock source */ pllinputfreq = HSE_VALUE; break; default: pllinputfreq = __LL_RCC_CALC_MSI_FREQ(LL_RCC_MSI_IsEnabledRangeSelect(), (LL_RCC_MSI_IsEnabledRangeSelect() ? LL_RCC_MSI_GetRange() : LL_RCC_MSI_GetRangeAfterStandby())); break; } return __LL_RCC_CALC_PLLSAI2_ADC_FREQ(pllinputfreq, LL_RCC_PLL_GetDivider(), LL_RCC_PLLSAI2_GetN(), LL_RCC_PLLSAI2_GetR()); }
/** * @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 (MSI) 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; /* Check parameter */ assert_param(IS_LL_RCC_RNG_CLKSOURCE(RNGxSource)); /* RNGCLK clock frequency */ switch (LL_RCC_GetRNGClockSource(RNGxSource)) { case LL_RCC_RNG_CLKSOURCE_PLLSAI1: /* PLLSAI1 clock used as RNG clock source */ if (LL_RCC_PLLSAI1_IsReady()) { rng_frequency = RCC_PLLSAI1_GetFreqDomain_48M(); } break; case LL_RCC_RNG_CLKSOURCE_PLL: /* PLL clock used as RNG clock source */ if (LL_RCC_PLL_IsReady()) { rng_frequency = RCC_PLL_GetFreqDomain_48M(); } break; case LL_RCC_RNG_CLKSOURCE_MSI: /* MSI clock used as RNG clock source */ if (LL_RCC_MSI_IsReady()) { rng_frequency = __LL_RCC_CALC_MSI_FREQ(LL_RCC_MSI_IsEnabledRangeSelect(), (LL_RCC_MSI_IsEnabledRangeSelect() ? LL_RCC_MSI_GetRange() : LL_RCC_MSI_GetRangeAfterStandby())); } 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; }