/*
* Initialize the RTC peripheral
*/
XMC_RTC_STATUS_t XMC_RTC_Init(const XMC_RTC_CONFIG_t *const config)
{
if (XMC_RTC_IsRunning() == false)
{
if (XMC_RTC_IsEnabled() == false)
{
XMC_RTC_Enable();
}
XMC_RTC_SetPrescaler(config->prescaler);
while ((XMC_SCU_GetMirrorStatus() & (SCU_GENERAL_MIRRSTS_RTC_TIM0_Msk | SCU_GENERAL_MIRRSTS_RTC_TIM1_Msk)) != 0U)
{
/* check SCU_MIRRSTS to ensure that no transfer over serial interface is pending */
}
RTC->TIM0 = config->time.raw0;
RTC->TIM1 = config->time.raw1;
while ((XMC_SCU_GetMirrorStatus() & (SCU_GENERAL_MIRRSTS_RTC_ATIM0_Msk | SCU_GENERAL_MIRRSTS_RTC_ATIM1_Msk)) != 0U)
{
/* check SCU_MIRRSTS to ensure that no transfer over serial interface is pending */
}
RTC->ATIM0 = config->alarm.raw0;
RTC->ATIM1 = config->alarm.raw1;
}
return XMC_RTC_STATUS_OK;
}
/*
* This function is to get the time in seconds calculated from Epoch time
* (01/01/1970).
*/
RTC_STATUS_t RTC_Time(time_t* time_value)
{
uint32_t elapsedyear;
uint32_t elapsedmonth;
uint32_t elapseddays;
uint32_t elapsedseconds;
RTC_STATUS_t status;
XMC_RTC_TIME_t curr_time;
XMC_ASSERT("RTC_Time: NULL pointer", time_value != NULL);
/*Check if RTC module is enabled and no NULL pointer*/
if (true == XMC_RTC_IsRunning())
{
/* Read values from TIM0 and TIM1 registers */
XMC_RTC_GetTime(&curr_time);
/*Count number of Days for Elapsed Years since Epoch*/
elapseddays = ((uint32_t)curr_time.year - RTC_EPOCH_YEAR) * RTC_DAYS_IN_AN_YEAR;
/* Add the number of days to be adjusted for leap years,
start from previous year and check backward */
for (elapsedyear = ((uint32_t)curr_time.year - 1U); elapsedyear>= (uint32_t)1970; elapsedyear--)
{
if (RTC_lleapyear((uint16_t)elapsedyear))
{
elapseddays++;
}
}
/*If current year is leap year add 1 only if March or later*/
if (RTC_lleapyear(curr_time.year))
{
if(curr_time.month > 2U)
{
elapseddays++;
}
}
/*Add number of Days from Elapsed months from current year*/
for (elapsedmonth = (curr_time.month); elapsedmonth != 0U; elapsedmonth--)
{
elapseddays += RTC_DAYS_IN_MONTH[elapsedmonth];
}
/*Add Elapsed days from current month*/
elapseddays += curr_time.days;
/*Accumulate the total seconds for ElapsedDays*/
elapsedseconds = (elapseddays * RTC_SECONDS_IN_A_DAY);
/*Add seconds for current hour, minute and seconds*/
elapsedseconds += ((uint32_t)curr_time.hours * RTC_SECONDS_IN_AN_HOUR);
elapsedseconds += ((uint32_t)curr_time.minutes * RTC_SECONDS_IN_A_MINUTE);
elapsedseconds += (uint32_t)curr_time.seconds;
*time_value = (time_t)elapsedseconds;
status = RTC_STATUS_SUCCESS;
}
else
{
status = RTC_STATUS_FAILURE;
}
return (status);
}
