/* Configures the RTC clock (RTCCLK). Once the RTC clock is selected it can't be changed unless the Backup domain is reset.  */
void RCC_RTCCLKConfig(uint32_t RCC_RTCCLKSource)
/* Configures the RTC clock (RTCCLK). Once the RTC clock is selected it can't be changed unless the Backup domain is reset.  */
void RCC_RTCCLKConfig(uint32_t RCC_RTCCLKSource)
{
    assert_param(IS_RCC_RTCCLK_SOURCE(RCC_RTCCLKSource));
    RCC->BDCR |= RCC_RTCCLKSource;
}