Digital Alarm Clock
You are required to design a digital alarm clock using the S7G2-SK. The basic clock's
functionality follows the State Transition Diagram in Figure 1. As there are no audible outputs
on these boards, use two LEDs that flash alternately to signify an alarm condition. Use a third
LED to give a visual output as to when the alarm is in a set condition. The alarm clock is limited
to using two buttons to change the mode of operation, as indicated in State Transition Diagram.
You are required to implement the alarm functionality in addition to the normal clock where
the alarm clock's alarm can only be set or cleared in the 'Normal Display' state; this is the only
state that the alarm condition can be activated, which would require the alarm to be set and the
actual time to match the alarm time. (The alarm functionality is not indicated in the state
transition diagram) If the alarm has been activated then any of the two buttons will stop the
alarm, taking it out of the set condition. If the alarm is not stopped by user interaction, then
after one minute the alarm clock will automatically stop the LEDs toggling, again taking it out
of a set condition.
Reset
Normal
Display
Switch 1
Switch 2
Set
Normal
Hour
Set
Normal
Minutes
+1
Set
Normal
Seconds
+1
+1
Figure 1: State Diagram of a Real-time digital clock
