#include #include #include // OLED display settings #define SCREEN_WIDTH 128 #define SCREEN_HEIGHT 64 #define OLED_RESET -1 Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET); // Joystick Pins for Arduino Mega #define JOY_X A0 #define JOY_Y A1 #define JOY_BTN 2 // Game variables #define BLOCK_SIZE 4 #define MAX_SNAKE_LENGTH 100 int snakeX[MAX_SNAKE_LENGTH]; int snakeY[MAX_SNAKE_LENGTH]; int snakeLength = 5; int direction = 1; // 0=Up, 1=Right, 2=Down, 3=Left int foodX; int foodY; int score = 0; bool gameOver = false; void setup() { Serial.begin(9600); pinMode(JOY_BTN, INPUT_PULLUP); // Use internal pullup for the button // Initialize OLED if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { Serial.println(F("SSD1306 allocation failed")); for(;;); } display.clearDisplay(); display.setTextSize(1); display.setTextColor(SSD1306_WHITE); // Title screen border display.drawRect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, SSD1306_WHITE); display.setCursor(30, 25); display.print("SNAKE GAME"); display.display(); delay(2000); resetGame(); } void loop() { // 1. Check the button FIRST! This lets you restart anytime. if (digitalRead(JOY_BTN) == LOW) { resetGame(); delay(200); // A tiny delay to stop accidental double-clicks } // 2. If the game is over, just show the screen and stop moving if (gameOver) { displayGameOver(); return; } // 3. Normal gameplay logic readJoystick(); updateSnake(); checkCollisions(); drawGame(); // Game Speed delay(40); } void resetGame() { snakeLength = 5; direction = 1; // Start moving right score = 0; gameOver = false; // Initial snake position for (int i = 0; i < snakeLength; i++) { snakeX[i] = (SCREEN_WIDTH / 2) - (i * BLOCK_SIZE); snakeY[i] = SCREEN_HEIGHT / 2; } spawnFood(); } void spawnFood() { // Spawn food inside the grid, avoiding the outer border foodX = random(1, (SCREEN_WIDTH / BLOCK_SIZE) - 1) * BLOCK_SIZE; foodY = random(1, (SCREEN_HEIGHT / BLOCK_SIZE) - 1) * BLOCK_SIZE; } void readJoystick() { int xVal = analogRead(JOY_X); int yVal = analogRead(JOY_Y); // Custom Calibration Integration // UP: xVal < 200 // DOWN: xVal > 800 // LEFT: yVal > 800 // RIGHT: yVal < 200 if (xVal < 200 && direction != 2) { direction = 0; // Up } else if (xVal > 800 && direction != 0) { direction = 2; // Down } else if (yVal > 800 && direction != 1) { direction = 3; // Left } else if (yVal < 200 && direction != 3) { direction = 1; // Right } } void updateSnake() { // Move the body segments for (int i = snakeLength - 1; i > 0; i--) { snakeX[i] = snakeX[i - 1]; snakeY[i] = snakeY[i - 1]; } // Move the head if (direction == 0) snakeY[0] -= BLOCK_SIZE; // Up if (direction == 1) snakeX[0] += BLOCK_SIZE; // Right if (direction == 2) snakeY[0] += BLOCK_SIZE; // Down if (direction == 3) snakeX[0] -= BLOCK_SIZE; // Left } void checkCollisions() { // Wall collision (Border) if (snakeX[0] < 0 || snakeX[0] >= SCREEN_WIDTH || snakeY[0] < 0 || snakeY[0] >= SCREEN_HEIGHT) { gameOver = true; } // Self collision for (int i = 1; i < snakeLength; i++) { if (snakeX[0] == snakeX[i] && snakeY[0] == snakeY[i]) { gameOver = true; } } // Food collision if (snakeX[0] == foodX && snakeY[0] == foodY) { score++; if (snakeLength < MAX_SNAKE_LENGTH) { snakeLength++; } spawnFood(); } } void drawGame() { display.clearDisplay(); // Draw border display.drawRect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, SSD1306_WHITE); // Draw food display.fillRect(foodX, foodY, BLOCK_SIZE, BLOCK_SIZE, SSD1306_WHITE); // Draw snake for (int i = 0; i < snakeLength; i++) { display.fillRect(snakeX[i], snakeY[i], BLOCK_SIZE, BLOCK_SIZE, SSD1306_WHITE); } display.display(); } void displayGameOver() { display.clearDisplay(); // Draw border display.drawRect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT, SSD1306_WHITE); display.setTextSize(2); display.setCursor(12, 12); display.print("GAME OVER"); display.setTextSize(1); display.setCursor(20, 35); display.print("Final Score: "); display.print(score); display.setCursor(10, 50); display.print("Click stick to play"); display.display(); }

Snake game on oled display

Wiring Schematic

Source Code

Hardware Required