NXP Semiconductors MC9S08LG16, Reference Manual

Page: 305 / 373

Chapter 14 Real-Time Counter (S08RTCV1)
MC9S08LG32 MCU Series, Rev. 5
Freescale Semiconductor 305
#pragma TRAP_PROC
void RTC_ISR(void)
{
/* Clear the interrupt flag */
RTCSC.byte = RTCSC.byte | 0x80;
/* RTC interrupts every 1 Second */
+;
/* 60 seconds in a minute */
if (Seconds > 59){
+;
Seconds = 0;
}
/* 60 minutes in an hour */
if (Minutes > 59){
Hours++;
Minutes = 0;
}
/* 24 hours in a day */
if (Hours > 23){
Days ++;
Hours = 0;
}
}