Merge pull request #324 from arduino/rtc-update

Add RTC alarm setter without callback

Author: facchinm

libraries/RTC/src/RTC.cpp

@@ -653,7 +653,11 @@ bool RTClock::setAlarmCallback(rtc_cbk_t fnc, RTCTime &t, AlarmMatch &m) {
 
     if(is_initialized) {
         onRtcInterrupt();
-        setRtcAlarmClbk(fnc);
+
+        if(fnc != nullptr) {
+            setRtcAlarmClbk(fnc);
+        }
+
         rtc_alarm_time_t at;
         at.min_match = false;               
         at.sec_match = false;                
@@ -684,6 +688,10 @@ bool RTClock::setAlarmCallback(rtc_cbk_t fnc, RTCTime &t, AlarmMatch &m) {
     return false;
 }
 
+bool RTClock::setAlarm(RTCTime &t, AlarmMatch &m) {
+    return this->setAlarmCallback(nullptr, t, m);
+}
+
 bool RTClock::isRunning() {
     return isRtcRunning();
 }

libraries/RTC/src/RTC.h

@@ -181,6 +181,8 @@ class RTClock {
 
     bool setPeriodicCallback(rtc_cbk_t fnc, Period p);
     bool setAlarmCallback(rtc_cbk_t fnc, RTCTime &t, AlarmMatch &m);
+    bool setAlarm(RTCTime &t, AlarmMatch &m);
+    
     bool isRunning();
     bool setTime(RTCTime &t); 
     bool setTimeIfNotRunning(RTCTime &t);