void InitializeRealTimeClock( void )
{
Timer_Initialise();
// stop it
RTCCTL01 = RTCHOLD;
// use calibration data to adjust real time clock frequency
if ( QueryCalibrationValid() )
{
signed char RtcCalibrationValue = GetRtcCalibrationValue();
if ( RtcCalibrationValue < 0 )
{
RtcCalibrationValue = -1 * RtcCalibrationValue;
RTCCTL2 = RtcCalibrationValue & RTCCAL_VALUE_MASK;
}
else
{
RTCCTL2 = RtcCalibrationValue & RTCCAL_VALUE_MASK;
/* adjust up */
RTCCTL2 |= RTCCALS;
}
}
// Set the counter for RTC mode
RTCCTL01 |= RTCMODE;
// set 128 Hz rate for prescale 0 interrupt
RTCPS0CTL |= RT0IP_7;
// enable 1 pulse per second interrupt using prescale 1
RTCPS1CTL |= RT1IP_6 | RT1PSIE;
// 1 Hz calibration output
RTCCTL23 |= RTCCALF_3;
// setting the peripheral selection bit makes the other I/O control a don't care
// P2.4 = 1 Hz RTC calibration output
// Direction needs to be set as output
RTC_1HZ_PORT_SEL |= RTC_1HZ_BIT;
RTC_1HZ_PORT_DIR |= RTC_1HZ_BIT;
// These calls are to asm level patch functions provided by
// TI for the MSP430F5438
SetRTCYEAR((unsigned int)0x07db);
SetRTCMON((unsigned int)5);
SetRTCDAY((unsigned int)23);
SetRTCDOW((unsigned int)5);
SetRTCHOUR((unsigned int)23);
SetRTCMIN((unsigned int)58);
SetRTCSEC((unsigned int)0);
// Enable the RTC
RTCCTL01 &= ~RTCHOLD;
}
void InitRealTimeClock(void)
{
RtcInUseMask = 0;
// stop it
RTCCTL01 = RTCHOLD;
// use calibration data to adjust real time clock frequency
if (ValidCalibration())
{
signed char RtcCalibrationValue = GetRtcCalibrationValue();
if (RtcCalibrationValue < 0)
{
RtcCalibrationValue = -RtcCalibrationValue;
RTCCTL2 = RtcCalibrationValue & RTCCAL_VALUE_MASK;
}
else
{
RTCCTL2 = RtcCalibrationValue & RTCCAL_VALUE_MASK;
/* adjust up */
RTCCTL2 |= RTCCALS;
}
}
// Set RTC mode and BCD format
RTCCTL01 |= RTCMODE | RTCBCD;
// set 128 Hz rate for prescale 0 interrupt
RTCPS0CTL |= RT0IP_7;
// enable 1 pulse per second interrupt using prescale 1
RTCPS1CTL |= RT1IP_6 | RT1PSIE;
// 1 Hz calibration output
RTCCTL23 |= RTCCALF_3;
// setting the peripheral selection bit makes the other I/O control a don't care
// P2.4 = 1 Hz RTC calibration output
// Direction needs to be set as output
RTC_1HZ_PORT_SEL |= RTC_1HZ_BIT;
RTC_1HZ_PORT_DIR |= RTC_1HZ_BIT;
RestoreRtc();
// Enable the RTC
RTCCTL01 &= ~RTCHOLD;
}
