Name: Ian Van Horn Email: imvanhorn1@gmail.com
Lab 4 Traffic Light Simulator
This
lab's goal is to create a traffic light simulation of an FPGA
This lab requires Vivado
Week 1: Simulate traffic lights(50 points).
Figure 1: Logic table for traffic lights
Figure 1: Logic expressions and example cycle
A k map was not used, the expressions can easily be derived from looking at the logic table.
Figure 1-1: Code for traffic light simulation
Every time the clock rises the lights are assigned their state. Each
case updates the input values so the next case is selected on the next
countmax.
Figure 1-2: Traffic light simulation
Figure 1-3: Code to impliment traffic lights of FPGA
Video 1-1: Traffic Lights on Board
Leftmost lights in each set are red, middle is yellow, right is green.
Week 2: Rush Hour Mode (50 points).
Figure 2-1: Rush Hour traffic light
I could not find a way to directly change cntmax. The workround is
creating a second count max and a select variable. When in rush hour
mode start with a normal cycle because select starts at 0. Then change
select to 1 so the second cycle using cntmax2 is used.
I also upped the time difference to 4x the original because doubling it was not very clear on video.
Figure 2-1: Rush hour simulation
Conclusion: This lab provided practice in coding programs from scratch and clocked circuts
