mc9s08sg4 Freescale Semiconductor, Inc, mc9s08sg4 Datasheet - Page 195

• Manufacturer Part Number: mc9s08sg4
• Description: 8-bit Microcontroller Family
• Manufacturer: Freescale Semiconductor, Inc

#pragma TRAP_PROC
void RTC_ISR(void)
{
Freescale Semiconductor
/* Clear the interrupt flag */
RTCSC.byte = RTCSC.byte | 0x80;
/* RTC interrupts every 1 Second */
Seconds++;
/* 60 seconds in a minute */
if (Seconds > 59){
Minutes++;
Seconds = 0;
}
/* 60 minutes in an hour */
if (Minutes > 59){
Hours++;
Minutes = 0;
}
/* 24 hours in a day */
if (Hours > 23){
Days ++;
Hours = 0;
}
MC9S08SG8 MCU Series Data Sheet, Rev. 3
Chapter 13 Real-Time Counter (S08RTCV1)
195