Esempi in C++ (Cpp) per LL_RCC_LSI_IsReady

Esempio n. 1

File: rtc_ll_stm32.c Progetto: nordic-krch/zephyr

static int rtc_stm32_init(struct device *dev)
{
	struct device *clk = device_get_binding(STM32_CLOCK_CONTROL_NAME);
	const struct rtc_stm32_config *cfg = DEV_CFG(dev);

	__ASSERT_NO_MSG(clk);

	k_sem_init(DEV_SEM(dev), 1, UINT_MAX);
	DEV_DATA(dev)->cb_fn = NULL;

	clock_control_on(clk, (clock_control_subsys_t *) &cfg->pclken);

	LL_PWR_EnableBkUpAccess();
	LL_RCC_ForceBackupDomainReset();
	LL_RCC_ReleaseBackupDomainReset();

#if defined(CONFIG_RTC_STM32_CLOCK_LSI)

	LL_RCC_LSI_Enable();
	while (LL_RCC_LSI_IsReady() != 1)
		;
	LL_RCC_SetRTCClockSource(LL_RCC_RTC_CLKSOURCE_LSI);

#else /* CONFIG_RTC_STM32_CLOCK_LSE */

	LL_RCC_LSE_SetDriveCapability(CONFIG_RTC_STM32_LSE_DRIVE_STRENGTH);
	LL_RCC_LSE_Enable();

	/* Wait untill LSE is ready */
	while (LL_RCC_LSE_IsReady() != 1)
		;

	LL_RCC_SetRTCClockSource(LL_RCC_RTC_CLKSOURCE_LSE);

#endif /* CONFIG_RTC_STM32_CLOCK_SRC */

	LL_RCC_EnableRTC();

	if (LL_RTC_DeInit(RTC) != SUCCESS) {
		return -EIO;
	}

	if (LL_RTC_Init(RTC, ((LL_RTC_InitTypeDef *)
			      &cfg->ll_rtc_config)) != SUCCESS) {
		return -EIO;
	}

	LL_RTC_EnableShadowRegBypass(RTC);

	LL_EXTI_EnableIT_0_31(EXTI_LINE);
	LL_EXTI_EnableRisingTrig_0_31(EXTI_LINE);

	rtc_stm32_irq_config(dev);

	return 0;
}

Esempio n. 2

/**
  * @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;
}