Alarm Clock Example

1
Alarm Clock Example

• Kylie Williams

2
The Alarm Clock Example

• When the setTime bit is set, the timeIn is stored
  as the clockTime and output as the display time
• When the setAlarm bit is set, the timeIn is
  stored as the alarmTime and output as the display
  time
• When the alarmToggle bit is set, the alarmOn bit
  is toggled
• When clockTime and alarmTime are equivalent and
  alarmOn is set, the alarm should be sounded.
  Otherwise it should not.
• The clock ncrements its time value when time is
  not being set.

3
Mux

• use time_types
• facet mux(timeInin time displayTimeout time
• clockTimein time
  setAlarmin boolean setTimein boolean) is
• begin state_based
• l1 if setAlarm true then displayTime'
  timeIn
• l2 if setTime true then displayTime'
  timeIn
• l3 if not (setTime or setAlarm) then
  displayTime' clockTime
• end mux

4
Store

• use time_types
• facet store(timeInin time setAlarmin
  boolean setTimein boolean
• toggleAlarmin boolean
  clockTimeout time
• alarmTimeout time
  alarmOnout boolean) is
• begin state_based
• l1 if setAlarm true
• then alarmTime' timeIn
• else alarmTime' alarmTime
• endif
• l2 if setTime true
• then clockTime' timeIn
• else clockTime' clockTime
• endif
• l3 if toggleAlarm true
• then alarmOn' -alarmOn
• else alarmOn' alarmOn
• endif
• end store

5
Counter

• use time_types
• facet counter(clockTimeinout time) is
• begin state_based
• l4 clockTime' increment-time(clockTime)
• end counter

6
Comparator

• use time_types
• facet comparator(alarmOnin boolean alarmTime
  in time
• clockTimein time
  alarmout boolean) is
• begin state_based
• l1 if (alarmOn true and (alarmTime
  clockTime)) then
• alarm' true
• else alarm false
• end comparator

7
Alarm Clock

• use time_types
• facet alarmClockStruct() is
• timeIn, displayTime time
• alarm, setAlarm setTime, alarmToggle
  boolean
• clockTime, alarmTime time
• alarmOn boolean
• begin logic
• store_1 store(timeIn, setAlarm, setTime,
  alarmToggle, clockTime,
• alarmTime, alarmOn)
• counter_1 counter(clockTime)
• comparator_1 comparator(setAlarm, alarmTime,
  clockTime, alarm)
• mux_1 mux(timeIn, displayTime, clockTime,
  setAlarm, setTime)
• end alarmClockStruct

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How might this be verified?