rtc.c

#include <stdint.h>
#include <stdbool.h>
#include <time.h>
#include "driverlib/debug.h"
#include "driverlib/gpio.h"
#include "driverlib/pin_map.h"
#include "driverlib/rom.h"
#include "driverlib/sysctl.h"
#include "inc/hw_hibernate.h"
#include "driverlib/hibernate.h"
#include "utils/ustdlib.h"
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include "semphr.h"

extern xSemaphoreHandle g_pRTCSemaphore;

time_t rtcSeconds;	 /* date/time in unix SECONDS past 1-Jan-70 */

/* initializes the hibernation RTC module */

void Rtc_Init(void)
{
		unsigned long ui32SysClock;
		SysCtlPeripheralEnable(SYSCTL_PERIPH_HIBERNATE);
		HibernateEnableExpClk(ui32SysClock);
		HibernateClockConfig(HIBERNATE_OSC_LOWDRIVE);
		HibernateRTCEnable();
}

/* gets the number of seconds from the hibernation counter register and converts it to calendar format */
/* use this function to get the current time and date*/
void Rtc_GetDate( struct tm *tm_ptr )
{
	xSemaphoreTake( g_pRTCSemaphore, portMAX_DELAY );
	ulocaltime( HibernateRTCGet(), tm_ptr );
	xSemaphoreGive( g_pRTCSemaphore );
}

/* converts a date/time format to seconds to be loaded into the hibernation counter register */
/* use this function to set the current time and date*/
void Rtc_SetDate( struct tm *tm_ptr )
{	
	xSemaphoreTake( g_pRTCSemaphore, portMAX_DELAY );
	HibernateRTCSet( umktime( tm_ptr ) );
	xSemaphoreGive( g_pRTCSemaphore );
}

/* use this code to convert time to ascii for display on terminal or LCD
  format the output for uart
  strftime((char *)buf_rz, 32, "%c\r\n", &tm2);
  UARTSend((uint8_t *)buf_rz, 32);
*/