rtc_b_ex1_calendermode.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
        );
 
    /*
    * Select Port J
    * Set Pin 4, 5 to input Primary Module Function, LFXT.
    */
    GPIO_setAsPeripheralModuleFunctionInputPin(
        GPIO_PORT_PJ,
        GPIO_PIN4 + GPIO_PIN5,
        GPIO_PRIMARY_MODULE_FUNCTION
    );
 
    /*
     * Disable the GPIO power-on default high-impedance mode to activate
     * previously configured port settings
     */
    PMM_unlockLPM5();
 
    //Initialize LFXT1
    CS_turnOnLFXT(
        CS_LFXT_DRIVE_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);
 
    RTC_B_clearInterrupt(RTC_B_BASE,
        RTC_B_CLOCK_READ_READY_INTERRUPT +
        RTC_B_TIME_EVENT_INTERRUPT +
        RTC_B_CLOCK_ALARM_INTERRUPT
        );
    //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_enableInterrupt(RTC_B_BASE,
        RTC_B_CLOCK_READ_READY_INTERRUPT +
        RTC_B_TIME_EVENT_INTERRUPT +
        RTC_B_CLOCK_ALARM_INTERRUPT
        );
 
    //Start RTC Clock
    RTC_B_startClock(RTC_B_BASE);
 
    //Enter LPM3 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;
    }
}