justin-marian / fsm-vending-machine

FSM vending machine, it dispenses products based on user input and provides change based on the money introduced.

Vending Machine

Simple finite state vending machine designed to dispense products based on user input and provide change when necessary. The vending machine operates in three main states: Idle, Money, and Product & Change.

States

Idle

• In this state, the vending machine awaits user input.
• Receives money / request for a product, it transitions to the Money state.
• Receives request for change, it goest to the Product & Change state.

Money

• In this state, the vending machine processes the user's money input.
• If the user requests a product (product_x or product_y), it checks if there's enough money to dispense the selected product.
• For insufficient funds, it returns to the Idle state.
• For enough money, gives the product and goes back to the Idle state.

Product & Change

• Calculates the remaining change to be returned to the user.
• It calculates the change in terms of 1 Lei and 50 Bani.
• After calculating the change, it transitions back to the Idle state.

Inputs and Outputs

Inputs:

• input_50bani: Indicates insertion of a 50 Bani.
• input_1lei: Indicates insertion of a 1 Lei.
• input_5lei: Indicates insertion of a 5 Lei.
• reset: Resets the vending machine.
• clk: Clock input.
• get_product_x: Request for product X.
• get_product_y: Request for product Y.
• change: Request for change.

Outputs:

• give_product_x: Signal to dispense product X.
• give_product_y: Signal to dispense product Y.
• give_remaining_50bani: Signal to dispense rest 50 Bani as change.
• give_remaining_1lei: Signal to dispense rest 1 Lei as change.

Usage

Instantiate the vending machine module in your Verilog design and connect the inputs and outputs as described above. Simulate or synthesize the design to observe the behavior of the vending machine.