Avoid cars on LCD.

traffic.ard

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define I2C_ADDR 0x27
#define Rs_pin  0
#define Rw_pin  1
#define En_pin  2
#define Bl_pin  3

#define D4_pin  4
#define D5_pin  5
#define D6_pin  6
#define D7_pin  7

#define UP_BUTTON 7
#define DOWN_BUTTON 8

byte playerChar[8] = {
  B00000,
  B01110,
  B01110,
  B00100,
  B01110,
  B10101,
  B00100,
  B01010,
};

byte carChar[8] = {
  B00000,
  B00000,
  B00000,
  B00000,
  B01111,
  B11001,
  B11111,
  B01010,
};

bool road[3][17] = {
  {false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false},
  {false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false},
  {false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false},
};

int score = -16;
int character = 1;

int buttonUpLast = LOW;
int buttonDownLast = LOW;

int carSpeed = 500;
bool canMove = false;
unsigned long lastMillis = millis();

LiquidCrystal_I2C  lcd(I2C_ADDR,En_pin,Rw_pin,Rs_pin,D4_pin,D5_pin,D6_pin,D7_pin);

void setup() {
  Serial.begin(9600);
  
  // Setup pin modes
  pinMode(UP_BUTTON, INPUT);
  pinMode(DOWN_BUTTON, INPUT);
  
  lcd.begin(16,4);
  lcd.setBacklightPin(Bl_pin, POSITIVE);
  lcd.setBacklight(HIGH);

  // Create characters
  lcd.createChar(0, playerChar);
  lcd.createChar(1, carChar);
  
  lcd.home();
  lcd.print("Score: ");
}

void updateCarMatrix() {
  for (int i = 0; i < 16; i++) {
    road[0][i] = road[0][i+1];
    road[1][i] = road[1][i+1];
    road[2][i] = road[2][i+1];
  }

  switch(random(0, 4)) {
    case 0:
      road[0][15] = true;
      break;
    case 1:
      road[1][15] = true;
      break;
    case 2:
      road[2][15] = true;
      break;
  }
}

void resetGameStats() {
  for (int h = 0; h < 3; h++) {
    for (int w = 0; w < 16; w++) {
      road[h][w] = false;
    }
  }
  canMove = false;
  score = -16;
  character = 1;
}

void gameWon() {
  lcd.clear();
  lcd.setCursor(3,1);
  lcd.print("Game won!");
  lcd.setCursor(1,1);
  lcd.print("You're a God..");
  lcd.setCursor(3,2);
  lcd.print("Score: ");
  lcd.setCursor(10,2);
  lcd.print(score, DEC);
  delay(1000);
  lcd.setCursor(0,2);
  lcd.print("                ");
  delay(500);
  lcd.setCursor(3,2);
  lcd.print("Score: ");
  lcd.setCursor(10,2);
  lcd.print(score, DEC);
  delay(1000);
  lcd.setCursor(0,2);
  lcd.print("                ");
  delay(500);
  lcd.setCursor(3,2);
  lcd.print("Score: ");
  lcd.setCursor(10,2);
  lcd.print(score, DEC);
  delay(1000);
  lcd.setCursor(0,2);
  lcd.print("                ");
  delay(500);
  lcd.setCursor(3,2);
  lcd.print("Score: ");
  lcd.setCursor(10,2);
  lcd.print(score, DEC);
  delay(2000);
  resetGameStats();
}

void gameOver() {
  lcd.clear();
  lcd.setCursor(3,1);
  lcd.print("Game over!");
  lcd.setCursor(3,2);
  lcd.print("Score: ");
  lcd.setCursor(10,2);
  lcd.print(score, DEC);
  delay(1000);
  lcd.setCursor(0,2);
  lcd.print("                ");
  delay(500);
  lcd.setCursor(3,2);
  lcd.print("Score: ");
  lcd.setCursor(10,2);
  lcd.print(score, DEC);
  delay(1000);
  lcd.setCursor(0,2);
  lcd.print("                ");
  delay(500);
  lcd.setCursor(3,2);
  lcd.print("Score: ");
  lcd.setCursor(10,2);
  lcd.print(score, DEC);
  delay(1000);
  lcd.setCursor(0,2);
  lcd.print("                ");
  delay(500);
  lcd.setCursor(3,2);
  lcd.print("Score: ");
  lcd.setCursor(10,2);
  lcd.print(score, DEC);
  delay(2000);
  resetGameStats();
}

void loop() {
  // Detect character movement
  int up = digitalRead(UP_BUTTON);
  int down = digitalRead(DOWN_BUTTON);
  if (up == HIGH && down == LOW && up != buttonUpLast) {
    character -= 1;
    if (character < 0) character = 2;
  } else if (up == LOW && down == HIGH && down != buttonDownLast) {
    character += 1;
    character %= 3;
  }
  if (!canMove && (up != buttonUpLast || down != buttonDownLast)) {
    randomSeed(millis());
    canMove = true;
    character = 1;
  }
  buttonUpLast = up;
  buttonDownLast = down;

  if (score >= 500) {
    gameWon();
  }

  if (millis() < lastMillis) {
    lastMillis = millis();
  } else if (canMove && millis() - lastMillis >= carSpeed) {
    updateCarMatrix();
    score++;
    carSpeed = 500 - score;
    lastMillis = millis();
  }
  
  // Print score
  lcd.home();
  lcd.print("Score: ");
  lcd.setCursor(7,0);
  lcd.print("         ");
  lcd.setCursor(7,0);
  if (score <= 0) {
    lcd.print(0, DEC);
  } else {
    lcd.print(score, DEC);
  }

  // Draw cars
  for (int h = 1; h < 4; h++) {
    for (int w = 0; w < 16; w++) {
      lcd.setCursor(w,h);
      if(road[h-1][w]) {
        lcd.write(byte(1));
      } else if (w != 0) {
        lcd.print(" ");
      }
    }
  }

  
  // Draw character
  switch (character) {
    case 0:
      if(!road[1][0]) {
        lcd.setCursor(0,2);
        lcd.print(" ");
      }
      if(!road[2][0]) {
        lcd.setCursor(0,3);
        lcd.print(" ");
      }
      lcd.setCursor(0,1);
      break;
    case 1:
      if(!road[0][0]) {
        lcd.setCursor(0,1);
        lcd.print(" ");
      }
      if(!road[2][0]) {
        lcd.setCursor(0,3);
        lcd.print(" ");
      }
      lcd.setCursor(0,2);
      break;
    case 2:
      if(!road[0][0]) {
        lcd.setCursor(0,1);
        lcd.print(" ");
      }
      if(!road[1][0]) {
        lcd.setCursor(0,2);
        lcd.print(" ");
      }
      lcd.setCursor(0,3);
      break;
  }
  lcd.write(byte(0));

  if (!canMove) {
      lcd.setCursor(3,2);
      lcd.print("Press any");
      lcd.setCursor(0,3);
      lcd.print("button to start!");
  }

  if ((road[0][0] && character == 0) || (road[1][0] && character == 1) || (road[2][0] && character == 2)){
    gameOver();
  }
}