rtc_b_ex1_calendermodeLPM0.c

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 * Copyright (c) 2017, Texas Instruments Incorporated
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 *    notice, this list of conditions and the following disclaimer.
 *
 * *  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);
 
    //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 LPM0 mode with interrupts enabled
    __bis_SR_register(LPM0_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)
{
    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;
    }
}