/* Sets the RTC control register hour format to PM (12h) 
Requires unlocking backup domain write protection (PWR_CR_DBP)  */
void rtc_set_pm_format(void)
/* Sets the RTC control register hour format to PM (12h) 
Requires unlocking backup domain write protection (PWR_CR_DBP)  */
void rtc_set_pm_format(void)
{
	RTC_CR |= RTC_CR_FMT;
}