This task will complete the traffic light system you began in part $1$ of this project and will

incorporate a pedestrian crossing button$/$switch into the system $($rather than the system

automatically transitioning$)$ and will include a Stateflow Chart block in the model.

A Stateflow Chart is a block in Simulink that allows us to implement finite state$-$machines

$($FSMs$)$ which are systems that can be described as a

set of states that transition depending on certain

conditions being met. Traffic lights are ideal

examples of FSMs; we can consider this system as

being made up of Three $(3)$ states;

$1)$ cars go $($green light$)$ and pedestrians stop $($red

light$),$

$2)$ cars given caution signal $($yellow light$)$ and

pedestrians stop $($red light$),$ and

$3)$ Cars stop $($red light$)$ and pedestrians go $($green light$).$

Part A

Modify the basic structure of the traffic light system you built for part $1$ of this project to

simulate $($use Dashboard components$)$ a FSM version of this system that behaves as follows:

$-$ The system must still consist of Three $(3)$ traffic lights $($red$,$

yellow and green$)$ and Two $(2)$ pedestrian lights $($red and green$).$

$-$ The system must also have a pedestrian button $($a Dashboard

push button$)$ that detects when a person wants to cross the road.

$-$ The FSM must be defined as having Three $(3)$ states only.

$-$ State $1$ allows the traffic to go $($the green traffic and red

pedestrian lights will both be on$,$ all other lights will be off$)$ and

this state will remain active until the pedestrian button is pushed.

$-$ After the pedestrian button is pushed, the system will transition

to state $2$ where the traffic is cautioned for Three $(3)$ seconds $($the yellow$/$amber traffic

and red pedestrian lights will both be on$,$ all other lights will be off$).$

$-$ Finally, state $3$ allows the pedestrian to cross the road for Six $(6)$ seconds $($the red

traffic and green pedestrian lights will be on$,$ all other lights will be off$).$

$-$ The system must then reset back to state $1$ and repeat this process.

For your design methodology, ensure you use an algorithmic state diagram and state

transition table to show how the system should work.

Part B

Once you$$re happy your simulation is working, and you$$ve troubleshot anything that needs

fixing, replace the simulation blocks $($Lamps and Pushbutton$)$ with the appropriate Arduino

inputs$/$outputs and deploy this system to the Arduino Uno hardware. The system should

behave the same as before, but red, green, and yellow LEDs should light up instead of the

simulated lamps, and you$$ll use a momentary switch on your breadboard to act as the

pedestrian button.