rtc.c

#include "board.h"
#include "../rtc.h"
#include "../delay.h"

/* Required for 'struct tm' prototypes in driverlib/hibernate.h */
#include <time.h>

#include "driverlib/sysctl.h"
#include "driverlib/hibernate.h"

void RTC_init(void)
{
  if(HibernateIsActive() == false)
  {
    /* Enable Hibernation Peripheral */
    HibernateEnableExpClk(SysCtlClockGet());

    /* Give time for 32KHz Crystal Osc to stabilise */
    Delay_ms(1500);

    /* Enable 32KHz Osc as RTC Clock */
    HibernateClockConfig(HIBERNATE_OSC_HIGHDRIVE);

    /* Enable RTC */
    HibernateRTCEnable();
  }
}

void RTC_getTime(uint32_t *time)
{
  *time = HibernateRTCGet();
}

void RTC_getTime_ms(uint64_t *time_ms)
{
  *time_ms = ((uint64_t)HibernateRTCGet() * 1000) + (((uint64_t)HibernateRTCSSGet() * 1000) / 32768);
}

void RTC_setTime(uint32_t *time)
{
  HibernateRTCSet(*time);
}

bool RTC_timerElapsed_ms(uint64_t start_time_ms, uint64_t period_ms)
{
  uint64_t current_time_ms;
  RTC_getTime_ms(&current_time_ms);

  if(current_time_ms < start_time_ms || current_time_ms > (start_time_ms + period_ms))
  {
    return true;
  }
  else
  {
    return false;
  }
}