The French Republican Calendar Alarm Clock

Contents

1. Goals
2. Instructions

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After presenting your latest clock (the French Republican Alarm Clock) to your eccentric boss, he had one concern:

What about the bear market?

Worried that your compensation is worthless now, you quickly ask him what happened to the stock prices. He looked confused and said

No, I meant about marketing this alarm clock to bears!

Confused (and regretting not pursuing academia) you decide to ask more about what your boss is thinking about. Apparently, your boss is worried about bears sleeping in during hibernation, and suggests that you implement more features to your alarm clock to account for the day of the week, week of the month, and month of the year when determining when to ring the alarm. Shocked at his request, you propose that the team maintaining the Conventional Alarm Clock could take up this responsibility for their Conventional Alarm Clock 2 set to release soon. Your boss turns this idea down, claiming that no reasonable bear would ever consider using calendars in multiples of 60 for the sole reason that bears can’t do math. He instead suggests you add it to your “simpler” alarm clock. After leaving the meeting room (with a massive headache), you decide to calm your mind and research how to implement this silly task.

Upon closer inspection, it seems that these French revolutionaries gave up on their simpler system, and their higher order units of time became a bit more irregular. The French Republican Calendar has 10 days in a week, 3 weeks in a month, and 12 months in a year. This however results in a 5-6 days (the complementary days) fewer in a year than the convetional calendar we use today. You decide that you don’t have enough Advil to worry about this at the current moment. After a normal dosage of Advil, you sit down and get to work.

Goals

1. Learn how to use Digital
2. Create a French Republican Calendar

Instructions

Lab Report

Question 5: Please explain your logic for rolling over the day of the week, week of the month, month of the year.

All of your work should be in a new circuit called FrenchRepublicanCalendarAlarmClock (it will save as FrenchRepublicanCalendarAlarmClock.dig).

You have been given some more signals than the previous parts, namely:

• DAY_ADV
• WEEK_ADV
• MONTH_ADV
• DAYS
• WEEKS
• MONTHS
• YEARS
• ALARM_DAYS
• ALARM_WEEKS
• ALARM_MONTHS
• SEG_DAYS
• SEG_WEEKS
• SEG_MONTHS
• SEG_YEARS

Implementing the complementary day logic is not necessary for this part and counts as extra credit.

Please check the previous parts to see how the signals were used (the naming convention should give you a hint) and implement the missing logic required. Since the French Republican calendar was in effect for no more than 14 years, your prototype is satisfactory to confine itself to handling 16 years using a 4-bit counter. You do not need to implement any setting logic for YEARS, only the CLR and the display logic.

Remember, your final circuit should implement:

• The correct time functionality (outlined in bold in the lore above)
• The CLR pin clears everything
• The time setting logic
• The alarm setting logic
• The alarm buzzing logic
• The display functionality