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CS203_project_testbench.v
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CS203_project_testbench.v
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//Name - Rohit Kinha
//Entry Number - 2020csb1118
//Car Parking System Testbench
`timescale 1ns / 1ps
module tb_parking_system();
// Inputs
reg clk;
reg reset_n;
reg sensor_entrance;
reg sensor_exit;
reg [1:0] password;
// Outputs
wire GREEN_LED;
wire RED_LED;
wire [3:0] number;
wire [9:0] fare;
wire [2:0] state;
parking_system uut (
.clk(clk),
.reset_n(reset_n),
.sensor_entrance(sensor_entrance),
.sensor_exit(sensor_exit),
.password(password),
.GREEN_LED(GREEN_LED),
.RED_LED(RED_LED),
.number(number),
.fare(fare),
.state(state)
);
initial begin
// Initialize Inputs
clk=1'b0;
reset_n = 0;
sensor_entrance = 0;
sensor_exit = 0;
password = 2'b00;
#10 clk=1'b1;
#10;
$display("Welcome to Smart Car Parking System.\n");
$display("Note: Single bit port mean ON if 1 and OFF if 0");
$display("\nINPUTS\nSensor-entrance: %b, Sensor-exit: %b //Idle state",sensor_entrance, sensor_exit);
$display("Password: %b (Correct password=11)",password);
$display("OUTPUTS\nRed Light: %b, Green Light: %b",RED_LED, GREEN_LED);
$display("Number: %b(Binary), %d (Decimal) | Fare: %d(Decimal)",number,number,fare);
if(state==3'b000)
$display("State: IDLE\n");
else if(state==3'b001)
$display("State: WAIT PASSWORD\n");
else if(state==3'b010)
$display("State: WRONG PASSWORD\n");
else if(state==3'b011)
$display("State: RIGHT PASSWORD\n");
else if(state==3'b100)
$display("State: STOP\n");
clk=1'b0;
reset_n = 0;
sensor_entrance = 1;
sensor_exit = 0;
password = 2'b00;
#10 clk=1'b1;
#10;
$display("\nINPUTS\nSensor-entrance: %b, Sensor-exit: %b //Car incoming. Red Light and ask for Password",sensor_entrance, sensor_exit);
$display("Password: %b (Correct password=11)",password);
$display("OUTPUTS\nRed Light: %b, Green Light: %b",RED_LED, GREEN_LED);
$display("Number: %b(Binary), %d (Decimal) | Fare: %d(Decimal)",number,number,fare);
if(state==3'b000)
$display("State: IDLE\n");
else if(state==3'b001)
$display("State: WAIT PASSWORD\n");
else if(state==3'b010)
$display("State: WRONG PASSWORD\n");
else if(state==3'b011)
$display("State: RIGHT PASSWORD\n");
else if(state==3'b100)
$display("State: STOP\n");
clk=1'b0;
reset_n = 0;
sensor_entrance = 1;
sensor_exit = 0;
password = 2'b00;
#10 clk=1'b1;
#10;
$display("\nINPUTS\nSensor-entrance: %b, Sensor-exit: %b //Wrong password. Ask again",sensor_entrance, sensor_exit);
$display("Password: %b (Correct password=11)",password);
$display("OUTPUTS\nRed Light: %b, Green Light: %b",RED_LED, GREEN_LED);
$display("Number: %b(Binary), %d (Decimal) | Fare: %d(Decimal)",number,number,fare);
if(state==3'b000)
$display("State: IDLE\n");
else if(state==3'b001)
$display("State: WAIT PASSWORD\n");
else if(state==3'b010)
$display("State: WRONG PASSWORD\n");
else if(state==3'b011)
$display("State: RIGHT PASSWORD\n");
else if(state==3'b100)
$display("State: STOP\n");
clk=1'b0;
reset_n = 0;
sensor_entrance = 1;
sensor_exit = 0;
password = 2'b11;
#10 clk=1'b1;
#10;
$display("\nINPUTS\nSensor-entrance: %b, Sensor-exit: %b //Correct password. Green light and Number of cars increased.",sensor_entrance, sensor_exit);
$display("Password: %b (Correct password=11)",password);
$display("OUTPUTS\nRed Light: %b, Green Light: %b",RED_LED, GREEN_LED);
$display("Number: %b(Binary), %d (Decimal) | Fare: %d(Decimal)",number,number,fare);
if(state==3'b000)
$display("State: IDLE\n");
else if(state==3'b001)
$display("State: WAIT PASSWORD\n");
else if(state==3'b010)
$display("State: WRONG PASSWORD\n");
else if(state==3'b011)
$display("State: RIGHT PASSWORD\n");
else if(state==3'b100)
$display("State: STOP\n");
clk=1'b0;
reset_n = 0;
sensor_entrance = 0;
sensor_exit = 1;
password = 2'b11;
#10 clk=1'b1;
#10;
$display("\nINPUTS\nSensor-entrance: %b, Sensor-exit: %b",sensor_entrance, sensor_exit);
$display("Password: %b (Correct password=11)",password);
$display("OUTPUTS\nRed Light: %b, Green Light: %b",RED_LED, GREEN_LED);
$display("Number: %b(Binary), %d (Decimal) | Fare: %d(Decimal)",number,number,fare);
if(state==3'b000)
$display("State: IDLE\n");
else if(state==3'b001)
$display("State: WAIT PASSWORD\n");
else if(state==3'b010)
$display("State: WRONG PASSWORD\n");
else if(state==3'b011)
$display("State: RIGHT PASSWORD\n");
else if(state==3'b100)
$display("State: STOP\n");
clk=1'b0;
reset_n = 0;
sensor_entrance = 1;
sensor_exit = 0;
password = 2'b00;
#10 clk=1'b1;
#10;
$display("\nINPUTS\nSensor-entrance: %b, Sensor-exit: %b //New Car incoming. Red light and ask for password.",sensor_entrance, sensor_exit);
$display("Password: %b (Correct password=11)",password);
$display("OUTPUTS\nRed Light: %b, Green Light: %b",RED_LED, GREEN_LED);
$display("Number: %b(Binary), %d (Decimal) | Fare: %d(Decimal)",number,number,fare);
if(state==3'b000)
$display("State: IDLE\n");
else if(state==3'b001)
$display("State: WAIT PASSWORD\n");
else if(state==3'b010)
$display("State: WRONG PASSWORD\n");
else if(state==3'b011)
$display("State: RIGHT PASSWORD\n");
else if(state==3'b100)
$display("State: STOP\n");
clk=1'b0;
reset_n = 0;
sensor_entrance = 1;
sensor_exit = 0;
password = 2'b11;
#10 clk=1'b1;
#10;
$display("\nINPUTS\nSensor-entrance: %b, Sensor-exit: %b //Correct Password. Green Light and Parked",sensor_entrance, sensor_exit);
$display("Password: %b (Correct password=11)",password);
$display("OUTPUTS\nRed Light: %b, Green Light: %b",RED_LED, GREEN_LED);
$display("Number: %b(Binary), %d (Decimal) | Fare: %d(Decimal)",number,number,fare);
if(state==3'b000)
$display("State: IDLE\n");
else if(state==3'b001)
$display("State: WAIT PASSWORD\n");
else if(state==3'b010)
$display("State: WRONG PASSWORD\n");
else if(state==3'b011)
$display("State: RIGHT PASSWORD\n");
else if(state==3'b100)
$display("State: STOP\n");
clk=1'b0;
reset_n = 0;
sensor_entrance = 1;
sensor_exit = 1;
password = 2'b00;
#10 clk=1'b1;
#10;
$display("\nINPUTS\nSensor-entrance: %b, Sensor-exit: %b //New car comes simultaneously. Stop it to avoid collision.",sensor_entrance, sensor_exit);
$display("Password: %b (Correct password=11)",password);
$display("OUTPUTS\nRed Light: %b, Green Light: %b",RED_LED, GREEN_LED);
$display("Number: %b(Binary), %d (Decimal) | Fare: %d(Decimal)",number,number,fare);
if(state==3'b000)
$display("State: IDLE\n");
else if(state==3'b001)
$display("State: WAIT PASSWORD\n");
else if(state==3'b010)
$display("State: WRONG PASSWORD\n");
else if(state==3'b011)
$display("State: RIGHT PASSWORD\n");
else if(state==3'b100)
$display("State: STOP\n");
clk=1'b0;
reset_n = 0;
sensor_entrance = 1;
sensor_exit = 1;
password = 2'b00;
#10 clk=1'b1;
#10;
$display("\nINPUTS\nSensor-entrance: %b, Sensor-exit: %b //Still both sensors are 1 So New car still Stopped.",sensor_entrance, sensor_exit);
$display("Password: %b (Correct password=11)",password);
$display("OUTPUTS\nRed Light: %b, Green Light: %b",RED_LED, GREEN_LED);
$display("Number: %b(Binary), %d (Decimal) | Fare: %d(Decimal)",number,number,fare);
if(state==3'b000)
$display("State: IDLE\n");
else if(state==3'b001)
$display("State: WAIT PASSWORD\n");
else if(state==3'b010)
$display("State: WRONG PASSWORD\n");
else if(state==3'b011)
$display("State: RIGHT PASSWORD\n");
else if(state==3'b100)
$display("State: STOP\n");
clk=1'b0;
reset_n = 0;
sensor_entrance = 1;
sensor_exit = 0;
password = 2'b00;
#10 clk=1'b1;
#10;
$display("\nINPUTS\nSensor-entrance: %b, Sensor-exit: %b //Finally, exit sensor=0 so ask new car for password.",sensor_entrance, sensor_exit);
$display("Password: %b (Correct password=11)",password);
$display("OUTPUTS\nRed Light: %b, Green Light: %b",RED_LED, GREEN_LED);
$display("Number: %b(Binary), %d (Decimal) | Fare: %d(Decimal)",number,number,fare);
if(state==3'b000)
$display("State: IDLE\n");
else if(state==3'b001)
$display("State: WAIT PASSWORD\n");
else if(state==3'b010)
$display("State: WRONG PASSWORD\n");
else if(state==3'b011)
$display("State: RIGHT PASSWORD\n");
else if(state==3'b100)
$display("State: STOP\n");
clk=1'b0;
reset_n = 0;
sensor_entrance = 1;
sensor_exit = 0;
password = 2'b11;
#10 clk=1'b1;
#10;
$display("\nINPUTS\nSensor-entrance: %b, Sensor-exit: %b //Correct password. Green light. Parked.",sensor_entrance, sensor_exit);
$display("Password: %b (Correct password=11)",password);
$display("OUTPUTS\nRed Light: %b, Green Light: %b",RED_LED, GREEN_LED);
$display("Number: %b(Binary), %d(Decimal) | Fare: %d(Decimal)",number,number,fare);
if(state==3'b000)
$display("State: IDLE\n");
else if(state==3'b001)
$display("State: WAIT PASSWORD\n");
else if(state==3'b010)
$display("State: WRONG PASSWORD\n");
else if(state==3'b011)
$display("State: RIGHT PASSWORD\n");
else if(state==3'b100)
$display("State: STOP\n\n");
clk=1'b0;
reset_n = 1'b1;
sensor_entrance = 0;
sensor_exit = 0;
password = 2'b00;
#10 clk=1'b1;
#10;
$display("RESETTING");
$display("\nINPUTS\nSensor-entrance: %b, Sensor-exit: %b",sensor_entrance, sensor_exit);
$display("Password: %b (Correct password=11)",password);
$display("OUTPUTS\nRed Light: %b, Green Light: %b",RED_LED, GREEN_LED);
$display("Number: %b(Binary), %d(Decimal) | Fare: %d(Decimal)",number,number,fare);
if(state==3'b000)
$display("State: IDLE\n");
else if(state==3'b001)
$display("State: WAIT PASSWORD\n");
else if(state==3'b010)
$display("State: WRONG PASSWORD\n");
else if(state==3'b011)
$display("State: RIGHT PASSWORD\n");
else if(state==3'b100)
$display("State: STOP\n");
$display("Reset successfull. Do visit again :)");
end
initial begin
$dumpfile("output.vcd");
$dumpvars;
end
endmodule