// User alarm uses alarm 1
// Will trigger when day, hours, minutes, and seconds match
void ds3231_setUserAlarmWake(alarm_s* alarm)
{
// Clear flag
rtc_userAlarmState();
byte data;
read(DS3231_ADDR_CTRL, &data, 1);
if(alarm != NULL)
{
write(DS3231_ADDR_ALARM1_SECS, 0);
write(DS3231_ADDR_ALARM1_MINS, dec2bcd(alarm->min));
write(DS3231_ADDR_ALARM1_HRS, dec2bcd(alarm->hour));
write(DS3231_ADDR_ALARM1_DAYDATE, 0b01000000 | alarm->days);
SET_BITS(data, DS3231_BIT_A1IE);
}
else // Alarm disabled
CLEAR_BITS(data, DS3231_BIT_A1IE);
write(DS3231_ADDR_CTRL, data);
}
rtcwake_t time_wake()
{
#if RTC_SRC != RTC_SRC_INTERNAL
getRtcTime();
// Turn on square wave
rtc_sqw(RTC_SQW_ON);
// update = false;
// Check alarms
bool userAlarm = rtc_userAlarmState();
bool systemAlarm = rtc_systemAlarmState();
if(userAlarm && systemAlarm)
return RTCWAKE_USER_SYSTEM;
else if(userAlarm)
return RTCWAKE_USER;
else if(systemAlarm)
return RTCWAKE_SYSTEM;
#endif
return RTCWAKE_NONE;
}
