Add .clearInterrupt() function to RTC library

Author: adamgarbo

libraries/RTC/keywords.txt

@@ -15,6 +15,7 @@ setAlarm	KEYWORD2
 setAlarmMode	KEYWORD2
 attachInterrupt	KEYWORD2
 detachInterrupt	KEYWORD2
+clearInterrupt	KEYWORD2
 
 # Structures (KEYWORD3)
 

libraries/RTC/src/RTC.cpp

@@ -201,6 +201,11 @@ void Apollo3RTC::detachInterrupt() {
     am_hal_rtc_int_disable(AM_HAL_RTC_INT_ALM);
 }
 
+void Apollo3RTC::clearInterrupt() {
+    // Clear the RTC alarm interrupt
+    am_hal_rtc_int_clear(AM_HAL_RTC_INT_ALM);
+}
+
 // mthToIndex() converts a string indicating a month to an index value.
 // The return value is a value 0-12, with 0-11 indicating the month given
 // by the string, and 12 indicating that the string is not a month.

libraries/RTC/src/RTC.h

@@ -34,6 +34,7 @@ class Apollo3RTC {
     void setAlarmMode(uint8_t mode); //Set the RTC alarm repeat interval
     void attachInterrupt(); //Attach the RTC alarm interrupt
     void detachInterrupt(); //Detach the RTC alarm interrupt
+    void clearInterrupt(); //Clear RTC alarm interrupt
 
     uint32_t weekday; //0 to 6 representing the day of the week
     uint32_t century;