Coding
The Stepper and LiquidCrystal libraries of the Arduino software were used in the code. If no cigarette is inserted, only a cigarette counter is shown and some motivational text to encourage people to stop smoking. When a cigarette is inserted, the display changes to allow the user to select the appropriate time to shoot. After shooting by pressing the button, a message is shown depending on whether the ball entered the basket or not. The following code was uploaded to the Arduino:
/* BRUFACE MECHATRONICS 2015 Cigarette Ashtray Game
Dino, Elie, Marta, Miguel, Pascal
*/
#include <LiquidCrystal.h>
#include <Stepper.h>
#define STEPPER_IN_1 2
#define STEPPER_IN_2 3
#define STEPPER_IN_3 4
#define STEPPER_IN_4 5
#define BUTTON_PIN 7
#define CIGARETTE_SENSOR_PIN A0
#define BASKET_SENSOR_PIN A1
#define IR_SENSOR_PIN A2
Stepper stepper(200, STEPPER_IN_1, STEPPER_IN_2, STEPPER_IN_3, STEPPER_IN_4);
LiquidCrystal lcd(12, 13, 11, 10, 9, 8);
/*
*****************************************************************************
******the following are special characters to be displayed on the LCD********
*****************************************************************************
*/
byte smiley[8] =
{
B00000,
B10001,
B00000,
B00000,
B10001,
B01110,
B00000,
B00000
};
byte sad[8] =
{
B00000,
B10001,
B00000,
B00000,
B01110,
B10001,
B00000,
B00000
};
byte cross[8] =
{
B00000,
B00000,
B11011,
B01110,
B00100,
B01110,
B11011,
B00000
};
byte tick[8] =
{
B00000,
B00000,
B00001,
B00011,
B10110,
B11100,
B01000,
B00000
};
byte man_straight[8] =
{
B00100,
B01010,
B00100,
B11111,
B00100,
B00100,
B01010,
B10001
};
byte man_down [8] =
{
B00100,
B01010,
B00100,
B00100,
B01110,
B10101,
B01010,
B10001
};
byte man_up_r [8] =
{
B00100,
B01010,
B00101,
B00110,
B01100,
B10100,
B01010,
B10001
};
byte man_up_l [8] =
{
B00100,
B01010,
B10100,
B01100,
B00110,
B00101,
B01010,
B10001
};
// Text to be displayed on the LCD when no cigarette is inserted
String text[5] =
{
"insert cigarette"
"smoking kills",
"smoking is bad",
"quit smoking",
"you can do it"
};
bool ins_cig = LOW;
bool cur_cig = LOW;
bool last_cig = LOW;
bool shot_ok = LOW;
bool shot_nok = LOW;
bool forward = HIGH;
bool enable_button = LOW;
bool current_state = HIGH;
bool last_state = HIGH;
byte counter = -1;
byte Speed = 0;
byte steps = 0;
byte t_delay = 50;
byte ran = 4;
byte i = 0;
int cigarette_counter = 0;
unsigned long current_millis = 0;
unsigned long previous_millis = 0;
unsigned long current_millis_motor = 0;
unsigned long previous_millis_motor = 0;
unsigned long current_millis_text = 0;
unsigned long previous_millis_text = 0;
void setup()
{
//Create the LCD characters declared above
lcd.createChar(0, smiley);
lcd.createChar(1, sad);
lcd.createChar(2, tick);
lcd.createChar(3, cross);
lcd.createChar(4, man_straight);
lcd.createChar(5, man_down);
lcd.createChar(6, man_up_r);
lcd.createChar(7, man_up_l);
stepper.setSpeed(50);
lcd.begin(16, 2);
// use the internal pullup resistor in the Arduino
pinMode(BUTTON_PIN, INPUT_PULLUP);
}
// function to debounce the button
boolean debounce(boolean last, int pin)
{
boolean current = digitalRead(pin);
if (last != current)
{
delay(10);
current = digitalRead(pin);
}
return current;
}
void loop()
{
// this is used to count each cigarette only once,
// even if it stays a long time on front of the sensor
if (analogRead(CIGARETTE_SENSOR_PIN) < 650)
{
cur_cig = HIGH;
}
else
{
cur_cig = LOW;
}
// if a cigarette is inserted, enable the button and begin the game
if ((cur_cig) && (!last_cig))
{
lcd.setCursor(0, 1);
lcd.print(" ");
lcd.setCursor(0, 0);
lcd.print(" ");
lcd.setCursor(0, 0);
lcd.print("Hit the ");
lcd.write(byte(2));
lcd.print(" ");
lcd.write(byte(0));
lcd.write(byte(0));
lcd.write(byte(0));
cigarette_counter++;
enable_button = HIGH;
forward = HIGH;
counter = -1;
ins_cig = HIGH;
}
last_cig = cur_cig;
current_millis_text = millis();
if ((current_millis_text - previous_millis_text) > 1500)
{
if (!ins_cig)
{
lcd.setCursor(0, 0);
lcd.print(" ");
lcd.setCursor(0, 0);
lcd.print("cigarettes: ");
lcd.setCursor(12, 0);
lcd.print(cigarette_counter);
ins_cig = HIGH;
}
if (!enable_button)
{
previous_millis_text = current_millis_text;
lcd.setCursor(0, 1);
lcd.print(" ");
lcd.setCursor(0, 1);
lcd.print(text[i]);
i++;
if (i > 4) {
i = 0;
}
}
}
// Dancing man on the right cornet of the screen
if ((current_millis - previous_millis) > 200)
{
lcd.setCursor(15, 0);
ran = random(4, 7);
lcd.write(byte(ran));
previous_millis = current_millis;
}
current_millis = millis();
if ((current_millis - previous_millis >= t_delay) && (enable_button))
{
previous_millis = current_millis;
if (forward)
{
counter++;
lcd.setCursor(counter, 1);
if ((counter == 8) || (counter == 9) || (counter == 7))
{
lcd.write(byte(2));
}
else
{
lcd.write(byte(3));
}
if (counter >= 15)
{
counter = 16;
forward = LOW;
}
}
else
{
counter--;
lcd.setCursor(counter, 1);
lcd.print(" ");
if (counter <= 0)
{
counter = -1;
forward = HIGH;
}
}
}
current_state = debounce(last_state, BUTTON_PIN);
if ((!current_state) & (last_state))
{
if (enable_button)
{
if ((counter == 8) || (counter == 7) || (counter == 9))
{
// accelerate the stepper instead of directly moving at max speed
// otherwise the motor will not have engough torque to start the movement
while (Speed <= 150)
{
Speed += 15;
stepper.setSpeed(Speed);
stepper.step(2);
steps += 2;
}
counter = -1;
Speed = 0;
previous_millis_motor = millis();
enable_button = LOW;
shot_ok = HIGH;
}
else
{
// accelerate the stepper instead of directly moving at max speed
// otherwise the motor will not have engough torque to start the movement
while (Speed <= 130)
{
Speed += 15;
stepper.setSpeed(Speed);
stepper.step(3);
steps += 3;
}
counter = -1;
Speed = 0;
enable_button = LOW;
shot_nok = HIGH;
previous_millis_motor = millis();
}
}
else
{
lcd.setCursor(0, 1);
lcd.print(" ");
lcd.setCursor(0, 1);
lcd.print("insert cigarette");
previous_millis_text = millis();
}
}
last_state = current_state;
if (shot_nok)
{
lcd.clear();
lcd.print("try next time!");
lcd.setCursor(0, 1);
lcd.write(byte(4));
lcd.write(byte(5));
lcd.write(byte(7));
enable_button = LOW;
shot_nok = LOW;
ins_cig = LOW;
i = 0;
previous_millis_text = millis();
}
if (shot_ok)
{
if (analogRead(BASKET_SENSOR_PIN) < 1010)
{
lcd.setCursor(0, 1);
lcd.print(" ");
lcd.setCursor(0, 1);
lcd.print("you scored! ");
lcd.write(byte(0));
score++;
shot_ok = LOW;
ins_cig = LOW;
i = 0;
previous_millis_text = millis();
}
}
current_millis_motor = millis();
if ((current_millis_motor - previous_millis_motor) >= 400)
{
stepper.setSpeed(40);
stepper.step(-steps);
steps = 0;
}
}