rtc_b.c

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//*****************************************************************************
//
// rtc_b.c - Driver for the rtc_b Module.
//
//*****************************************************************************
 
//*****************************************************************************
//
//
//*****************************************************************************
 
#include "inc/hw_memmap.h"
 
#ifdef __MSP430_HAS_RTC_B__
#include "rtc_b.h"
 
#include <assert.h>
 
void RTC_B_startClock (uint16_t baseAddress)
{
    HWREG8(baseAddress + OFS_RTCCTL01_H) &= ~(RTCHOLD_H);
}
 
void RTC_B_holdClock (uint16_t baseAddress)
{
    HWREG8(baseAddress + OFS_RTCCTL01_H) |= RTCHOLD_H;
}
 
void RTC_B_setCalibrationFrequency (uint16_t baseAddress,
    uint16_t frequencySelect)
{
    HWREG16(baseAddress + OFS_RTCCTL23) &= ~(RTCCALF_3);
    HWREG16(baseAddress + OFS_RTCCTL23) |= frequencySelect;
}
 
void RTC_B_setCalibrationData (uint16_t baseAddress,
    uint8_t offsetDirection,
    uint8_t offsetValue)
{
    HWREG8(baseAddress + OFS_RTCCTL23_L) = offsetValue + offsetDirection;
}
 
void RTC_B_initCalendar (uint16_t baseAddress,
    Calendar *CalendarTime,
    uint16_t formatSelect)
{
    HWREG8(baseAddress + OFS_RTCCTL01_H) |= RTCHOLD_H;
 
    HWREG16(baseAddress + OFS_RTCCTL01) &= ~(RTCBCD);
    HWREG16(baseAddress + OFS_RTCCTL01) |= formatSelect;
 
    HWREG8(baseAddress + OFS_RTCTIM0_L) = CalendarTime->Seconds;
    HWREG8(baseAddress + OFS_RTCTIM0_H) = CalendarTime->Minutes;
    HWREG8(baseAddress + OFS_RTCTIM1_L) = CalendarTime->Hours;
    HWREG8(baseAddress + OFS_RTCTIM1_H) = CalendarTime->DayOfWeek;
    HWREG8(baseAddress + OFS_RTCDATE_L) = CalendarTime->DayOfMonth;
    HWREG8(baseAddress + OFS_RTCDATE_H) = CalendarTime->Month;
    HWREG16(baseAddress + OFS_RTCYEAR) = CalendarTime->Year;
}
 
Calendar RTC_B_getCalendarTime (uint16_t baseAddress)
{
    Calendar tempCal;
 
    while ( !(HWREG16(baseAddress + OFS_RTCCTL01) & RTCRDY) ) ;
 
    tempCal.Seconds    = HWREG8(baseAddress + OFS_RTCTIM0_L);
    tempCal.Minutes    = HWREG8(baseAddress + OFS_RTCTIM0_H);
    tempCal.Hours      = HWREG8(baseAddress + OFS_RTCTIM1_L);
    tempCal.DayOfWeek  = HWREG8(baseAddress + OFS_RTCTIM1_H);
    tempCal.DayOfMonth = HWREG8(baseAddress + OFS_RTCDATE_L);
    tempCal.Month      = HWREG8(baseAddress + OFS_RTCDATE_H);
    tempCal.Year       = HWREG16(baseAddress + OFS_RTCYEAR);
 
    return ( tempCal) ;
}
 
void RTC_B_configureCalendarAlarm(uint16_t baseAddress, 
    RTC_B_configureCalendarAlarmParam *param)
{
    //Each of these is XORed with 0x80 to turn on if an integer is passed,
    //or turn OFF if RTC_B_ALARM_OFF (0x80) is passed.
    HWREG8(baseAddress + OFS_RTCAMINHR_L) = (param->minutesAlarm ^ 0x80);
    HWREG8(baseAddress + OFS_RTCAMINHR_H) = (param->hoursAlarm ^ 0x80);
    HWREG8(baseAddress + OFS_RTCADOWDAY_L) = (param->dayOfWeekAlarm ^ 0x80);
    HWREG8(baseAddress + OFS_RTCADOWDAY_H) = (param->dayOfMonthAlarm ^ 0x80);
}
void RTC_B_setCalendarEvent (uint16_t baseAddress,
    uint16_t eventSelect)
{
    HWREG16(baseAddress + OFS_RTCCTL01) &= ~(RTCTEV_3); //Reset bits
    HWREG16(baseAddress + OFS_RTCCTL01) |= eventSelect;
}
 
void RTC_B_definePrescaleEvent (uint16_t baseAddress,
    uint8_t prescaleSelect,
    uint8_t prescaleEventDivider)
{
    HWREG8(baseAddress + OFS_RTCPS0CTL_L + prescaleSelect) &= ~(RT0IP_7);
    HWREG8(baseAddress + OFS_RTCPS0CTL_L +
        prescaleSelect) |= prescaleEventDivider;
}
 
uint8_t RTC_B_getPrescaleValue (uint16_t baseAddress,
    uint8_t prescaleSelect)
{
    if (RTC_B_PRESCALE_0 == prescaleSelect){
        return ( HWREG8(baseAddress + OFS_RTCPS_L) );
    } else if (RTC_B_PRESCALE_1 == prescaleSelect){
        return ( HWREG8(baseAddress + OFS_RTCPS_H) );
    } else   {
        return ( 0) ;
    }
}
 
void RTC_B_setPrescaleValue (uint16_t baseAddress,
    uint8_t prescaleSelect,
    uint8_t prescaleCounterValue)
{
    if (RTC_B_PRESCALE_0 == prescaleSelect){
        HWREG8(baseAddress + OFS_RTCPS_L) = prescaleCounterValue;
    } else if (RTC_B_PRESCALE_1 == prescaleSelect){
        HWREG8(baseAddress + OFS_RTCPS_H) = prescaleCounterValue;
    }
}
 
void RTC_B_enableInterrupt (uint16_t baseAddress,
    uint8_t interruptMask)
{
    if ( interruptMask & (RTCOFIE + RTCTEVIE + RTCAIE + RTCRDYIE) ){
        HWREG8(baseAddress + OFS_RTCCTL01_L) |=
            (interruptMask & (RTCOFIE + RTCTEVIE + RTCAIE + RTCRDYIE));
    }
 
    if (interruptMask & RTC_B_PRESCALE_TIMER0_INTERRUPT){
        HWREG8(baseAddress + OFS_RTCPS0CTL) |= RT0PSIE;
    }
 
    if (interruptMask & RTC_B_PRESCALE_TIMER1_INTERRUPT){
        HWREG8(baseAddress + OFS_RTCPS1CTL) |= RT1PSIE;
    }
}
 
void RTC_B_disableInterrupt (uint16_t baseAddress,
    uint8_t interruptMask)
{
    if ( interruptMask & (RTCOFIE + RTCTEVIE + RTCAIE + RTCRDYIE) ){
        HWREG8(baseAddress + OFS_RTCCTL01_L) &=
            ~(interruptMask & (RTCOFIE + RTCTEVIE + RTCAIE + RTCRDYIE));
    }
 
    if (interruptMask & RTC_B_PRESCALE_TIMER0_INTERRUPT){
        HWREG8(baseAddress + OFS_RTCPS0CTL) &= ~(RT0PSIE);
    }
 
    if (interruptMask & RTC_B_PRESCALE_TIMER1_INTERRUPT){
        HWREG8(baseAddress + OFS_RTCPS1CTL) &= ~(RT1PSIE);
    }
}
 
uint8_t RTC_B_getInterruptStatus (uint16_t baseAddress,
    uint8_t interruptFlagMask)
{
    uint8_t tempInterruptFlagMask = 0x0000;
 
    tempInterruptFlagMask |= (HWREG8(baseAddress + OFS_RTCCTL01_L)
                              & ((interruptFlagMask >> 4)
                                 & (RTCOFIFG +
                                    RTCTEVIFG +
                                    RTCAIFG +
                                    RTCRDYIFG)));
 
    tempInterruptFlagMask = tempInterruptFlagMask << 4;
 
    if (interruptFlagMask & RTC_B_PRESCALE_TIMER0_INTERRUPT){
        if ( HWREG8(baseAddress + OFS_RTCPS0CTL) & RT0PSIFG){
            tempInterruptFlagMask |= RTC_B_PRESCALE_TIMER0_INTERRUPT;
        }
    }
 
    if (interruptFlagMask & RTC_B_PRESCALE_TIMER1_INTERRUPT){
        if ( HWREG8(baseAddress + OFS_RTCPS1CTL) & RT1PSIFG){
            tempInterruptFlagMask |= RTC_B_PRESCALE_TIMER1_INTERRUPT;
        }
    }
 
    return ( tempInterruptFlagMask) ;
}
 
void RTC_B_clearInterrupt (uint16_t baseAddress,
    uint8_t interruptFlagMask)
{
    if ( interruptFlagMask & (RTC_B_TIME_EVENT_INTERRUPT +
                              RTC_B_CLOCK_ALARM_INTERRUPT +
                              RTC_B_CLOCK_READ_READY_INTERRUPT +
                              RTC_B_OSCILLATOR_FAULT_INTERRUPT) ){
 
        HWREG8(baseAddress + OFS_RTCCTL01_L) &=
            ~((interruptFlagMask>>4) & (RTCOFIFG +
                                        RTCTEVIFG +
                                        RTCAIFG +
                                        RTCRDYIFG));
    }
 
    if (interruptFlagMask & RTC_B_PRESCALE_TIMER0_INTERRUPT){
        HWREG8(baseAddress + OFS_RTCPS0CTL) &= ~(RT0PSIFG);
    }
 
    if (interruptFlagMask & RTC_B_PRESCALE_TIMER1_INTERRUPT){
        HWREG8(baseAddress + OFS_RTCPS1CTL) &= ~(RT1PSIFG);
    }
}
 
uint16_t RTC_B_convertBCDToBinary (uint16_t baseAddress,
    uint16_t valueToConvert)
{
    HWREG16(baseAddress + OFS_BCD2BIN) = valueToConvert;
    return ( HWREG16(baseAddress + OFS_BCD2BIN) );
}
 
uint16_t RTC_B_convertBinaryToBCD (uint16_t baseAddress,
    uint16_t valueToConvert)
{
    HWREG16(baseAddress + OFS_BIN2BCD) = valueToConvert;
    return ( HWREG16(baseAddress + OFS_BIN2BCD) );
}
 
 
#endif
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