CAR-PARKING-SYSTEM-USING-VERILOG
Tool Used : Vivado 2019.1, Spartan-7
ABSTRACT
FIG1- Simple Concept of Car Parking System
This project is designed to implement a car parking system using Verilog. In this project, at the entrance of the parking system, a sensor is used to detect the presence of a vehicle. Once the sensor is triggered, a password is requested to open the gate. If the entered password is correct, the gate opens to let the vehicle in, otherwise, the gate remains locked. This project is implemented on Spartan 7board
INTRODUCTION
Drivers searching for parking are estimated to be responsible for about 30% of traffic congestion in cities. Historically, cities, businesses, and property developers have tried to match parking supply to growing demand for parking spaces.
Parking System can be defined as the use of advanced technologies for the better operation, controlling of traffic, and management of parking within an urban area. A number of technologies provide the basis for parking solutions, including vehicle sensors, wireless communications, and data analytics. Parking System is also made useful by recent technology in areas such as mobile appilcation customer services, mobile UPI payments, and in-car GPS navigation systems. At the heart of the parking system concept is the ability to access, collect, analyze, disseminate, and act on information on parking usage. Increasingly, this information is provided in real-time from intelligent devices that enable both parking managers and drivers to optimize the use of parking capacity.
Motivation to use Parking System:
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New Revenue Streams – Many new revenue streams are possible with smart parking technology. For example, lot owners can enable tiered payment options dependent on parking space location. Also, reward programs can be integrated into existing models to encourage repeat users. 2.Integrated Payments and POS – Returning users can replace daily, manual cash payments with account invoicing and application payments from their phone. This could also enable customer loyalty programs and valuable user feedback.
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Real-Time Data and Trend Insight – Over time, a smart parking solution can produce data that uncovers correlations and trends of users and lots. These trends can prove to be invaluable to lot owners as to how to make adjustments and improvements to drivers.
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Reduced pollution – Searching for parking burns around one million barrels of oil a day. An optimal parking solution will significantly decrease driving time, thus lowering the amount of daily vehicle emissions and ultimately reducing the global environmental footprint.
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Enhanced User Experience – A smart parking solution will integrate the entire user experience into a unified action. Driver’s payment, spot identification, location search and time notifications all seamlessly become part of the destination arrival process.
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Optimized parking – Users find the best spot available, saving time, resources and effort. The parking lot fills up efficiently and space can be utilized properly by commercial and corporate entities.
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Reduced traffic – Traffic flow increases as fewer cars are required to drive around in search of an open parking space.
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Increased Safety – Parking lot employees and security guards contain real-time lot data that can help prevent parking violations and suspicious activity. License plate recognition cameras can gather pertinent footage. Also, decreased spotsearching traffic on the streets can reduce accidents caused by the distraction of searching for parking.
- Real-Time Data and Trend Insight – Over time, a smart parking solution can produce data that uncovers correlations and trends of users and lots. These trends can prove to be invaluable to lot owners as to how to make adjustments and improvements to drivers.
- Decreased Management Costs – More automation and less manual activity saves on labor cost and resource exhaustion.
### Significance The smart parking system is considered beneficial for the car park operators, car park patrons as well as in environment conservation.
FSM For Car Parking System
FIG2:- State Diagram for Car parking System ### Verilog Coding
`timescale 1ns / 1ps
module parking_system(
input clock_in,rst_in,
input Front_Sensor, Back_Sensor,
input [1:0] pass_1, pass_2,
output wire G_LED,R_LED,
output reg [6:0] HEX_1, HEX_2
);
parameter IDLE = 3'b000, WAIT_PASSWORD = 3'b001, WRONG_PASS = 3'b010, RIGHT_PASS = 3'b011,STOP = 3'b100;
// Moore FSM : output just depends on the current state
reg[2:0] PS, NS;
reg[31:0] cnt_wait;
reg red_tmp,green_tmp;
// Next state
always @(posedge clock_in or negedge rst_in)
begin
if(~rst_in)
PS = IDLE;
else
PS = NS;
end
// cnt_wait
always @(posedge clock_in or negedge rst_in)
begin
if(~rst_in)
cnt_wait <= 0;
else if(PS==WAIT_PASSWORD)
cnt_wait <= cnt_wait + 1;
else
cnt_wait <= 0;
end
// change state
always @(*)
begin
case(PS)
IDLE:
begin
if(Front_Sensor == 1)
NS = WAIT_PASSWORD;
else
NS = IDLE;
end
WAIT_PASSWORD:
begin
if(cnt_wait <= 3)
NS = WAIT_PASSWORD;
else
begin
if((pass_1==2'b01)&&(pass_2==2'b10))
NS = RIGHT_PASS;
else
NS = WRONG_PASS;
end
end
WRONG_PASS:
begin
if((pass_1==2'b01)&&(pass_2==2'b10))
NS = RIGHT_PASS;
else
NS = WRONG_PASS;
end
RIGHT_PASS:
begin
if(Front_Sensor==1 && Back_Sensor == 1)
NS = STOP;
else if(Back_Sensor == 1)
NS = IDLE;
else
NS = RIGHT_PASS;
end
STOP:
begin
if((pass_1==2'b01)&&(pass_2==2'b10))
NS = RIGHT_PASS;
else
NS = STOP;
end
default: NS = IDLE;
endcase
end
// LEDs and output, change the period of blinking LEDs here
always @(posedge clock_in) begin
case(PS)
IDLE:
begin
green_tmp = 1'b0;
red_tmp = 1'b0;
HEX_1 = 7'b1111111; // off
HEX_2 = 7'b1111111; // off
end
WAIT_PASSWORD:
begin
green_tmp = 1'b0;
red_tmp = 1'b1;
HEX_1 = 7'b000_0110; // E
HEX_2 = 7'b010_1011; // n
end
WRONG_PASS:
begin
green_tmp = 1'b0;
red_tmp = ~red_tmp;
HEX_1 = 7'b000_0110; // E
HEX_2 = 7'b000_0110; // E
end
RIGHT_PASS:
begin
green_tmp = ~green_tmp;
red_tmp = 1'b0;
HEX_1 = 7'b000_0010; // 6
HEX_2 = 7'b100_0000; // 0
end
STOP:
begin
green_tmp = 1'b0;
red_tmp = ~red_tmp;
HEX_1 = 7'b001_0010; // 5
HEX_2 = 7'b000_1100; // P
end
endcase
end
assign R_LED = red_tmp ;
assign G_LED = green_tmp;
endmodule
Verilog Testbench
`timescale 1ns / 1ps
module tb_parking_system;
// Inputs
reg clock_in;
reg rst_in;
reg Front_Sensor;
reg Back_Sensor;
reg [1:0] pass_1;
reg [1:0] pass_2;
// Outputs
wire G_LED;
wire R_LED;
wire [6:0] HEX_1;
wire [6:0] HEX_2;
// Instantiate the Unit Under Test (UUT)
parking_system uut (
.clock_in(clock_in),
.rst_in(rst_in),
.Front_Sensor(Front_Sensor),
.Back_Sensor(Back_Sensor),
.pass_1(pass_1),
.pass_2(pass_2),
.G_LED(G_LED),
.R_LED(R_LED),
.HEX_1(HEX_1),
.HEX_2(HEX_2)
);
initial
begin
clock_in = 0;
forever #10 clock_in = ~clock_in;
end
initial
begin
// Initialize Inputs
rst_in = 0;
Front_Sensor = 0;
Back_Sensor = 0;
pass_1 = 0;
pass_2 = 0;
// Wait 100 ns for global reset to finish
#100;
rst_in = 1;
#20;
Front_Sensor = 1;
#1000;
Front_Sensor = 0;
pass_1 = 1;
pass_2 = 2;
#2000;
Back_Sensor =1;
#100
Front_Sensor = 1;
// Add stimulus here
end
endmodule
Simulation Result
FIG3:- Simulation Results of Car Parking System