/**
* @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;
}
/**
* @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)
* - @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_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_PLLSAI1: /* PLLSAI1 clock used as USB clock source */
if (LL_RCC_PLLSAI1_IsReady())
{
usb_frequency = RCC_PLLSAI1_GetFreqDomain_48M();
}
break;
case LL_RCC_USB_CLKSOURCE_PLL: /* PLL clock used as USB clock source */
if (LL_RCC_PLL_IsReady())
{
usb_frequency = RCC_PLL_GetFreqDomain_48M();
}
break;
case LL_RCC_USB_CLKSOURCE_MSI: /* MSI clock used as USB clock source */
if (LL_RCC_MSI_IsReady())
{
usb_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_USB_CLKSOURCE_NONE: /* No clock used as USB clock source */
default:
usb_frequency = LL_RCC_PERIPH_FREQUENCY_NA;
break;
}
return usb_frequency;
}