rtc_c_ex1_calendarmode.c

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/* --COPYRIGHT--,BSD
 * Copyright (c) 2017, Texas Instruments Incorporated
 * All rights reserved.
 *
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 * *  Redistributions of source code must retain the above copyright
 *    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
 *    documentation and/or other materials provided with the distribution.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * --/COPYRIGHT--*/
//******************************************************************************
//******************************************************************************
 
#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_C
     * Pass in current time, intialized above
     * Use BCD as Calendar Register Format
     */
    /*Refer device header file and pass in baseaddress parameter for RTC_C
    as RTC_C_BASE or RTC_CE_BASE as defined in User's guide*/
    RTC_C_initCalendar(RTC_C_BASE,
        &currentTime,
        RTC_C_FORMAT_BCD);
 
    //Setup Calendar Alarm for 5:00pm on the 5th day of the week.
    //Note: Does not specify day of the week.
    /*Refer device header file and pass in baseaddress parameter for RTC_C
    as RTC_C_BASE or RTC_CE_BASE as defined in User's guide*/
    RTC_C_configureCalendarAlarmParam param = {0};
    param.minutesAlarm = 0x00;
    param.hoursAlarm = 0x17;
    param.dayOfWeekAlarm = RTC_C_ALARMCONDITION_OFF;
    param.dayOfMonthAlarm = 0x05;
    RTC_C_configureCalendarAlarm(RTC_C_BASE, &param);
 
    //Specify an interrupt to assert every minute
    /*Refer device header file and pass in baseaddress parameter for RTC_C
    as RTC_C_BASE or RTC_CE_BASE as defined in User's guide*/
    RTC_C_setCalendarEvent(RTC_C_BASE,
        RTC_C_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.
    /*Refer device header file and pass in baseaddress parameter for RTC_C
    as RTC_C_BASE or RTC_CE_BASE as defined in User's guide*/
    RTC_C_enableInterrupt(RTC_C_BASE,
        RTCRDYIE + RTCTEVIE + RTCAIE);
    RTC_C_enableInterrupt(RTC_C_BASE,
        RTCRDYIFG + RTCTEVIFG + RTCAIFG);
 
    //Start RTC Clock
    /*Refer device header file and pass in baseaddress parameter for RTC_C
    as RTC_C_BASE or RTC_CE_BASE as defined in User's guide*/
    RTC_C_startClock(RTC_C_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_ISR (void)
{
        switch (__even_in_range(RTCIV, 16)) {
        case RTCIV_NONE: break;  //No interrupts
        case RTCIV_RTCOFIFG: break;  //RTCOFIFG
        case RTCIV_RTCRDYIFG:         //RTCRDYIFG
                //Toggle P1.0 every second
                GPIO_toggleOutputOnPin(
                        GPIO_PORT_P1,
                        GPIO_PIN0);
                break;
        case RTCIV_RTCTEVIFG:         //RTCEVIFG
                //Interrupts every minute
                __no_operation();
 
                //Read out New Time a Minute Later BREAKPOINT HERE
                /*Refer device header file and pass in baseaddress 
                parameter for RTC_C as RTC_C_BASE or RTC_CE_BASE as 
                defined in User's guide*/
                newTime = RTC_C_getCalendarTime(RTC_C_BASE);
                break;
        case RTCIV_RTCAIFG:         //RTCAIFG
                //Interrupts 5:00pm on 5th day of week
                __no_operation();
                break;
        case RTCIV_RT0PSIFG: break; //RT0PSIFG
        case RTCIV_RT1PSIFG: break; //RT1PSIFG
 
        default: break;
    }
}