CSE 140L Hardware Four

Introduction to State Machine Ciruits Design

Due date: Dec 9, 1999

Objectives

We will learn how to design and build simple state machine circuits.

Part 1. Asynchronous Counter

Design a counter with the following sequence: 0-2-4-6-1-3-5-7 and the sequence will repeat.

i.	Design this counter (including state digram, state table, and K-maps, etc)
ii.	Build and simulate the circuit using xilinx.
iii.	Demonstrate your circuit to the TA: ______________________

Part 2. Asynchronous Counter

Design a counter with the following sequence: 0-1-2-3-4-5-6-7 and the sequence will repeat.

i.	Design this counter (including state digram, state table, and K-maps, etc)
ii.	Build and simulate the circuit using xilinx.

Part 3. Garage Door Controller

A garage door with the following characteristics:

One Input "On/Off" remote control switch.
One sensor to prevent garage door from closing while the car is in its way.
One output light turns "Off" only when the door is closed.
Another Output light flashes when the door is opening or closing, else the flashing light is "Off".

i.	Design this controller (Include a state digram and briefly describe the state diagram. Also include the state table, and K-maps, algebraic equation, and final answer).
ii.	Build the circuit and simulate is using xilinx

Part 4. Freeway Traffic Control

Around 4pm in the afternoon when much of the traffic starts to enter the freeway, a set of GREEN/RED signal are used to prevent highway jams. Here is the requirement definition:

There will be 2 lanes to enter the freeway: 1 carpool lane and 1 regular lane. Each lane will have a GREE/RED signal.
When both lanes have cars waiting, each lane will take turns to go (GREEN will rotate between 2 lanes).
When both lanes have no cars, both signal will be RED
When 1 lane has cars, only that lane will be GREEN. The other lane will always be RED.

i.	Design this controller (Include a state digram and briefly describe the state diagram and how it satisfies the requirement definition. Also include the state table, and K-maps, algebraic equation, and final answer).
ii.	Build the circuit and simulate is using xilinx
iii.	Show the TA that your circuit works_________________________________
iv.	What happens when your car breaks down on the carpool lane at the signal and it's your turn to go on GREEN light?

Part 5. Freeway Traffic Control 2

Similiar to Part 3, now we add an additional single-lane (makes 3 lanes total) with the additional requirement definition:

When all three lanes have cars waiting, they all take turns.

i.	Design the state diagram for this and briefly explain the diagram.

Report
Title page:

Names of students and due date.
Title of the lab and objective.
A brief description of each person's contribution.

Content:

1 i, ii, iii
2 i, ii
3 i, ii
4 i, ii, iii, iv
5 i

Verification:

Attach the lab assignment (this handout) at the end of the lab report with the TA verification.
Reminder: Once again, think of yourself as the grader but doesn't have the hand out. The grader should know what you did in the lab without looking at the hand out.

Grading

90% will based on the completeness and correctness of the report. 10% will based on the neatness, organization, and following instruction of the report format.