Support setting alarms from a NaiveTime

It allows for more concise user code when setting alarm from such object.

src/ds323x/alarms.rs

@@ -2,6 +2,7 @@
 
 use super::super::{BitFlags, Ds323x, Error, Hours, Register};
 use super::{decimal_to_packed_bcd, hours_to_register};
+use crate::ds323x::{NaiveTime, Timelike};
 use interface::{ReadData, WriteData};
 
 /// Parameters for setting Alarm1 on a day of the month
@@ -195,6 +196,20 @@ where
         self.iface.write_data(&mut data)
     }
 
+    /// Set Alarm1 for a time (fires when hours, minutes and seconds match).
+    ///
+    /// Will return an `Error::InvalidInputData` if any of the parameters is out of range.
+    /// day is not used by the matching strategy but is set to 1.
+    pub fn set_alarm1_hms(&mut self, when: NaiveTime) -> Result<(), Error<CommE, PinE>> {
+        let alarm = DayAlarm1 {
+            day: 1,
+            hour: Hours::H24(when.hour() as u8),
+            minute: when.minute() as u8,
+            second: when.second() as u8,
+        };
+        self.set_alarm1_day(alarm, Alarm1Matching::HoursMinutesAndSecondsMatch)
+    }
+
     /// Set Alarm1 for weekday.
     ///
     /// Will return an `Error::InvalidInputData` if any of the used parameters
@@ -274,6 +289,19 @@ where
         self.iface.write_data(&mut data)
     }
 
+    /// Set Alarm2 for a time (fires when hours, minutes and seconds match).
+    ///
+    /// Will return an `Error::InvalidInputData` if any of the parameters is out of range.
+    /// day is not used by the matching strategy but is set to 1.
+    pub fn set_alarm2_hm(&mut self, when: NaiveTime) -> Result<(), Error<CommE, PinE>> {
+        let alarm = DayAlarm2 {
+            day: 1,
+            hour: Hours::H24(when.hour() as u8),
+            minute: when.minute() as u8,
+        };
+        self.set_alarm2_day(alarm, Alarm2Matching::HoursAndMinutesMatch)
+    }
+
     /// Set Alarm2 for weekday.
     ///
     /// Will return an `Error::InvalidInputData` if any of the used parameters

tests/alarms.rs

@@ -8,7 +8,7 @@ use common::{
 };
 extern crate ds323x;
 use ds323x::{
-    Alarm1Matching as A1M, Alarm2Matching as A2M, DayAlarm1, DayAlarm2, Error, Hours,
+    Alarm1Matching as A1M, Alarm2Matching as A2M, DayAlarm1, DayAlarm2, Error, Hours, NaiveTime,
     WeekdayAlarm1, WeekdayAlarm2,
 };
 
@@ -635,7 +635,13 @@ mod alarm1_day {
         },
         A1M::AllMatch
     );
-
+    set_alarm_test!(
+        match_hms_naivetime,
+        set_alarm1_hms,
+        ALARM1_SECONDS,
+        [4, 3, 2, AM | 1],
+        NaiveTime::from_hms(2, 3, 4)
+    );
     set_alarm_test!(
         match_hms,
         set_alarm1_day,
@@ -914,7 +920,13 @@ mod alarm2_day {
         },
         A2M::AllMatch
     );
-
+    set_alarm_test!(
+        match_hm_naivetime,
+        set_alarm2_hm,
+        ALARM2_MINUTES,
+        [3, 2, AM | 1],
+        NaiveTime::from_hms(2, 3, 0)
+    );
     set_alarm_test!(
         match_hm,
         set_alarm2_day,