/*FUNCTION****************************************************************
*
* Function Name : _rtc_isr
* Returned Value : none
* Comments :
* This is ISR for RTC module, triggered each second.
*
*END*********************************************************************/
void _rtc_isr
(
/* [IN] rtc module pointer passed to interrupt */
pointer ptr
)
{
RTC_MemMapPtr rtc = RTC_BASE_PTR;
uint_32 tsr_reg, status;
uint_32 time_alarm;
boolean alarm_fault = TRUE;
status = rtc->SR;
/* Time Invalid Flag, Time Overflow Flag */
if (status & (RTC_SR_TIF_MASK | RTC_SR_TOF_MASK))
{
rtc->SR &= ~RTC_SR_TCE_MASK; /* disable rtc timer - enable write access */
rtc->TAR = 0xFFFFFFFF; /* e2574: RTC: Writing RTC_TAR[TAR] = 0 does not disable RTC alarm */
/* if TIF or TOF flag is set, reading TSR return zero and we must set TSR to one */
rtc->TSR = 1; /* this clear SR flags TIF, TOF */
rtc->SR |= RTC_SR_TCE_MASK;
user_requests |= ((status & RTC_SR_TIF_MASK) ? RTC_ISR_TIF : 0) | ((status & RTC_SR_TOF_MASK) ? RTC_ISR_TOF : 0);
}
/* Time Alarm Flag */
if (status & RTC_SR_TAF_MASK)
{
/* TAR can be changed, store register to variable */
time_alarm = rtc->TAR;
if( time_alarm == alarm_time.seconds )
{
user_requests |= RTC_ISR_ALARM;
_rtc_update_TAR( user_enables & ~RTC_ISR_ALARM );
alarm_fault = FALSE;
}
if( time_alarm == sw_time.seconds )
{
user_requests |= RTC_ISR_STOPWATCH;
_rtc_update_TAR( user_enables & ~RTC_ISR_STOPWATCH);
alarm_fault = FALSE;
}
if( alarm_fault == TRUE )
{
_rtc_update_TAR( user_enables & ~( RTC_ISR_STOPWATCH | RTC_ISR_ALARM) );
}
}
/* user callback */
if ((NULL != user_isr) && (user_requests & user_enables))
{
user_isr ((pointer)rtc);
}
}
/*FUNCTION****************************************************************
*
* Function Name : _rtc_isr
* Returned Value : none
* Comments :
* This is ISR for RTC module, triggered each second.
*
*END*********************************************************************/
void _rtc_isr
(
/* [IN] rtc module pointer passed to interrupt */
pointer ptr
)
{
VMCF51XX_RTC_STRUCT_PTR rtc = (VMCF51XX_RTC_STRUCT_PTR)ptr;
rtc->RTCSC |= MCF51XX_RTC_RTCSC_RTIF; // clear interrupt flag
user_requests |= MCF51XX_RTC_RTCISR_1HZ; // second boundary
real_time.seconds++;
if (real_time.seconds > 59) // minute boundary
{
real_time.seconds = 0;
user_requests |= MCF51XX_RTC_RTCISR_MIN;
if (stopwatch != (uint_32)-1) { // stopwatch decrementer
stopwatch--;
if (stopwatch == (uint_32)-1) {
user_requests |= MCF51XX_RTC_RTCISR_SW;
}
}
real_time.minutes++;
if (real_time.minutes > 59) // hour boundary
{
real_time.minutes = 0;
user_requests |= MCF51XX_RTC_RTCISR_HR;
real_time.hours++;
if (real_time.hours > 23) // days boundary
{
real_time.hours = 0;
user_requests |= MCF51XX_RTC_RTCISR_DAY;
real_time.days++;
}
}
}
// alarm checking
if ((real_time.seconds == alarm_time.seconds) && (real_time.minutes == alarm_time.minutes) && (real_time.hours == alarm_time.hours) && (real_time.days == alarm_time.days)) {
user_requests |= MCF51XX_RTC_RTCISR_ALM;
}
// user callback triggering
if ((NULL != user_isr) && (user_requests & user_enables)) user_isr ((pointer)rtc);
}
__interrupt void app_isr (void) {
// call user's ISR function
if (user_isr()) {
LPM3_EXIT;
}
}