1. Project 2: Ultra Traffic Light Controller
Mohammad Mahdi Karimi
PhD candidate
Electrical and Computer Engineering Department

2. Traffic Light project description Design RTL Schematic
Overview
Overview on BASYS 3 FPGA
Traffic Light project description
Design RTL Schematic
Challenges and our Approach
Video Demonstration

3. Project Description
In this project we modify the Traffic Light Controller in project 1 to come up with Ultra Traffic Light Controller using the Basys 3 board.
Project 2 features :
Using the Basys 3 board, design and implement the traffic light described in project 1
Add turn arrows in both directions for road B, as well as one for A south. The turn arrows for road B only turn on if there’s a car present.
LCD display show what is currently occurring (i.e. display “Road A Green, Road B Red”)
Also, the short and long timer intervals can be modified on the fly. The time intervals are changed via the keyboard or keypad.
The color for the traffic lights are to be displayed on the VGA monitor

4. Traffic Light Controller
We designed and implemented the traffic light at a junction of Street A,B and C by using the Finite State Machine described in Exercise 20.
Turn arrows is added in both directions for road B, as well as one for A south.
The turn arrows for road B only turn on if there’s a car present.
Lights on the Basys 3 board are used to demonstrate the sensor outputs and
The VGA output to demonstrate traffic lights.

5. Traffic Light Controller

6. Design RTL Schematic Our Design contains12 components: Clock to Sec
Timer
FSM
9 traffic light
VGA controller
Pmod CLP
7Segment controller
3 Sensors

7. FSM Design

8. Challenges
How to connect Key Pad to the design to make real time changes in the system configurations?
Connecting the 18 pin LCD with Basys3 to display a message which is interpreted by the current state of the FSM controller.
How to change the Timer component setting while system is running,

9. Our Approach
We used the TOP module to connect Key Pad with our design. The output of the Keypad will be Decoded with our Decoding block and will be used later to manipulate the system settings.
We used 18 pin LCD to display the current state of the FSM controller. We can see what state we are in at any time with the LCD module. (i.e. A St. Turn, B St. & Turn,…)
Timer component is now connected with the KeyPad module which controls the TS and TL timing while system is running. It will also display the timer in the available 7 segment display on BASYS3 FPGA.

10. Experiments: LCD Displays the current State:
KeyPad changes the Timer module Settings:

11. Thank you mmkarimi@aggies.ncat.edu Mohammad Mahdi Karimi PhD candidate
Electrical and Computer Engineering Department