battbak_ex1_calendermodeLPM3.c

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 * Copyright (c) 2017, Texas Instruments Incorporated
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 *
 * *  Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
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 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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//******************************************************************************
//******************************************************************************
#include "driverlib.h"
 
volatile Calendar newTime;
 
void main(void)
{
    Calendar currentTime;
 
    WDT_A_hold(WDT_A_BASE);
 
    // Unlock backup system
    while(BattBak_unlockBackupSubSystem(BAK_BATT_BASE));
 
    //Set P1.0 to output direction
    GPIO_setAsOutputPin(
        GPIO_PORT_P1,
        GPIO_PIN0
        );
 
    //Initialize LFXT1
    UCS_turnOnLFXT1(UCS_XT1_DRIVE_3,
                   UCS_XCAP_3
                   );
 
    //Setup Current Time for Calendar
    currentTime.Seconds = 0x00;
    currentTime.Minutes = 0x26;
    currentTime.Hours = 0x13;
    currentTime.DayOfWeek = 0x03;
    currentTime.DayOfMonth = 0x20;
    currentTime.Month = 0x07;
    currentTime.Year = 0x2011;
 
    //Initialize Calendar Mode of RTC
    /*
     * Base Address of the RTC_B
     * Pass in current time, intialized above
     * Use BCD as Calendar Register Format
     */
    RTC_B_initCalendar(RTC_B_BASE,
                       &currentTime,
                       RTC_B_FORMAT_BCD);
 
    //Setup Calendar Alarm for 5:00pm on the 5th day of the week.
    //Note: Does not specify day of the week.
    RTC_B_configureCalendarAlarmParam param = {0};
    param.minutesAlarm = 0x00;
    param.hoursAlarm = 0x17;
    param.dayOfWeekAlarm = RTC_B_ALARMCONDITION_OFF;
    param.dayOfMonthAlarm = 0x05;
    RTC_B_configureCalendarAlarm(RTC_B_BASE, &param);
 
    //Specify an interrupt to assert every minute
    RTC_B_setCalendarEvent(RTC_B_BASE,
                           RTC_B_CALENDAREVENT_MINUTECHANGE);
 
    //Enable interrupt for RTC Ready Status, which asserts when the RTC
    //Calendar registers are ready to read.
    //Also, enable interrupts for the Calendar alarm and Calendar event.
    RTC_B_clearInterrupt(RTC_B_BASE,
                         RTCRDYIFG + RTCTEVIFG + RTCAIFG);
    RTC_B_enableInterrupt(RTC_B_BASE,
                          RTCRDYIE + RTCTEVIE + RTCAIE);
 
    //Start RTC Clock
    RTC_B_startClock(RTC_B_BASE);
 
    //Enter LPM3 mode with interrupts enabled
    __bis_SR_register(LPM3_bits + GIE);
    __no_operation();
}
 
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
#pragma vector=RTC_VECTOR
__interrupt
#elif defined(__GNUC__)
__attribute__((interrupt(RTC_VECTOR)))
#endif
void RTC_B_ISR(void)
{
    // Unlock backup system
    while(BattBak_unlockBackupSubSystem(BAK_BATT_BASE));
 
    switch(__even_in_range(RTCIV,16))
    {
    case 0: break;      //No interrupts
    case 2:             //RTCRDYIFG
        //Toggle P1.0 every second
        GPIO_toggleOutputOnPin(
            GPIO_PORT_P1,
            GPIO_PIN0);
        break;
    case 4:             //RTCEVIFG
        //Interrupts every minute
        __no_operation();
 
        //Read out New Time a Minute Later BREAKPOINT HERE
        newTime = RTC_B_getCalendarTime(RTC_B_BASE);
        break;
    case 6:             //RTCAIFG
        //Interrupts 5:00pm on 5th day of week
        __no_operation();
        break;
    case 8: break;      //RT0PSIFG
    case 10: break;     //RT1PSIFG
    case 12: break;     //Reserved
    case 14: break;     //Reserved
    case 16: break;     //Reserved
    default: break;
    }
}