Smart and Autonomous parking.
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/*
* Athors: Oulis Evnagelos, Oulis Nikolaos, Katsibras Drosos
* Ultrasonic Sensor HC-SR04 and Arduino
* Dual Stepper Motor Shiled 1.1
* Subject: Autonomous Car Parking
*/
/*
* Include all libraries.
*
*/
/*
* Include the Arduino Servo Library
*/
#include <Servo.h>
/*
* Include the Ping Ulptrasonic Library
*/
#include <NewPing.h>
/*
* -------------------------------------------------------
*/
/*
* All Definitions.
*/
#define ULTRASONIC_TIMEOUT 100000
#define SERVO_SPEED 1
#define MAX_DISTANCE 200
/*
* Definitions for Motor Driver Pins.
*/
#define IN1 2
#define IN2 4
#define IN3 7
#define IN4 8
#define RIGHTSPEED 5
#define LEFTSPEED 3
#define MAX_WHEEL_SPEED 255
/*
* Definitions for Ultrasonic Pins
*/
#define TRIGPIN 12
#define ECHOPIN 11
/*
* Definitions for Servo Motor Pins.
*/
#define SERVOPIN 6
/*Definition for turn time*/
#define TURN_TIME 2000
#define FORWARD_STEP 500
/*
* -------------------------------------------------------
* Define Servo Data Struct
*/
Servo myServo;
/*
* Define Ultrasonic Struct
*/
NewPing sonar1 (TRIGPIN, ECHOPIN, MAX_DISTANCE);
/*
* Define all useful variables
*/
long duration;
float distance, distanceCm;
int pos, dir;
/*
* Turn Servo using custom Speed
*/
/*Function that takes as arguments from->first position and deg->next position */
void turnServo(int from, int deg){
int d;
if (from > deg){
for(d=from; d>=deg; d--){
myServo.write(d);
delay(SERVO_SPEED);
}
} else{
for(d=from; d<=deg; d++){
myServo.write(d);
delay(SERVO_SPEED);
}
}
}
/*
* Setup Wiring Components
*/
void setup() {
//pinMode(TRIGPIN, OUTPUT); // Sets the TRIGPIN as an Output
//pinMode(ECHOPIN, INPUT); // Sets the ECHOPIN as an Input
//pinMode(response, OUTPUT); // Sets to led aoutput.
pinMode(IN1, OUTPUT); //Motor Driver 1st Pin
pinMode(IN2, OUTPUT); //Motor Driver 2nd Pin
pinMode(IN3, OUTPUT); //Motor Driver 3rd Pin
pinMode(IN4, OUTPUT); //Motor Driver 4th Pin
pinMode(RIGHTSPEED, OUTPUT);
pinMode(LEFTSPEED, OUTPUT);
//Initialize Servo Motor
myServo.attach(SERVOPIN);
pos = 1;
dir = 1;
//Initialize car engine in sleep mode
motor_stop();
Serial.begin(9600); // Starts the serial communication
}
void serialFlush(){
while(Serial.available() > 0) {
char t = Serial.read();
}
}
/*
* Distance meter via Ultrasonic
*/
float getDistance(){
do{
int uS1 = sonar1.ping();
distanceCm = uS1 / US_ROUNDTRIP_CM;
delayMicroseconds(2);
} while(distanceCm == 0);
return distanceCm;
}
/*
* Left turn walk
*/
void turnLeft(const int wheelSpeed){
analogWrite(LEFTSPEED, wheelSpeed);
analogWrite(RIGHTSPEED, 0);
}
/*
* Right turn walk
*/
void turnRight(const int wheelSpeed){
analogWrite(LEFTSPEED, 0);
analogWrite(RIGHTSPEED, wheelSpeed);
}
/*
* Straight walk
*/
void absolute(const int wheelSpeed){
analogWrite(LEFTSPEED, wheelSpeed);
analogWrite(RIGHTSPEED, wheelSpeed);
}
/*
* Backward walk
*/
void backward(){
// Set Motor A backward
digitalWrite(IN1, HIGH);
digitalWrite(IN2, LOW);
// Set Motor B backward
digitalWrite(IN3, HIGH);
digitalWrite(IN4, LOW);
}
/*
* Forward walk
*/
void forward(){
// Set Motor A forward
digitalWrite(IN1, LOW);
digitalWrite(IN2, HIGH);
// Set Motor B forward
digitalWrite(IN3, LOW);
digitalWrite(IN4, HIGH);
}
/*
* Stop motors
*/
void motor_stop(){
digitalWrite(IN1, LOW);
digitalWrite(IN2, LOW);
digitalWrite(IN3, LOW);
digitalWrite(IN4, LOW);
}
void turn(const int wheelSpeed){
if (pos == 1){
absolute(wheelSpeed);
} else if (pos == 2){
turnLeft(wheelSpeed);
} else if (pos == 3){
absolute(wheelSpeed);
} else if (pos == 4){
turnRight(wheelSpeed);
}
}
void moveCar(){
if (pos == 3){
if (dir == 1){
turnRight(MAX_WHEEL_SPEED);
backward();
dir = 2;
} else{
turnLeft(MAX_WHEEL_SPEED);
backward();
dir = 1;
}
delay(1500);
forward();
} else{
forward();
}
}
void park(int parkingNo) {
int row = (parkingNo / 2);
int side = (parkingNo % 2); //If side is 1 then the parking is to right
// else if is 0 the parking is to left.
absolute(255);
forward();
delay(row*FORWARD_STEP);
motor_stop();
//Check the side value to turn.
if (side == 1) {
turnRight(255);
}
else {
turnLeft(255);
}
forward();
delay(TURN_TIME);
absolute(255);
while(getDistance()>10){
forward();
delay(100);
}
motor_stop();
}
int Serial_Input()
{
int number;
while(!Serial.available()) ;
serialFlush();
if (Serial.available() > 0) {
number = Serial.parseInt();
while (number <= 0) {
// convert the incoming byte to a char and add it to the string:
number = Serial.parseInt();
serialFlush();
}
// if you get a newline, print the string, then the string's value:
}
return number;
}
void loop() {
// Calculating the distance
//distance= getDistance();
//distance= getDistance();
park(Serial_Input());
}