Homework #3

Task - Snake Game - Develop a game on the 8x8 matrix with an interactive menu.

Video

Requirements

• Arduino Uno
• 8x8 LED Matrix
• Joystick
• MAX 7219 Driver
• LCD Display
• Buzzer
• Potentiometer
• 2 x Condensator
• Resistors
• Wires
• Brain

Implementation details

Connect the Matrix to the Driver:

Connect the Driver to the Arduino:

Connect the LCD to the Arduino:

Code Difficulties

• Implementing the snake movement logic:

  • The snake is an array of coordinates:

    int snakeX[snakeLength];
    int snakeY[snakeLength];

  • The head of the snake is the first element of the array:

    snakeX[0];
    snakeY[0];

  • The snake moves by adding a new head based on direction:

    // In this example the directions are swapped so that it is easier to use with my joystick position
    // Default:
    // RIGHT: snakeX[0]++;
    // LEFT:  snakeX[0]--;
    // UP:    snakeY[0]++;
    // DOWN:  snakeY[0]--;
    switch (snakeDirection) {
        case RIGHT:
          snakeY[0]--;
          break;
        case LEFT:
          snakeY[0]++;
          break;
        case UP:
          snakeX[0]++;
          break;
        case DOWN:
          snakeX[0]--;
          break;
        }

  • And by removing the tail:

    snakeX[i] = snakeX[i - 1]; 
    snakeY[i] = snakeY[i - 1];

  • Wrapping the snake through the edges of the matrix:

    snakeX[0] = (snakeX[0] + matrixSize) % matrixSize;
    snakeY[0] = (snakeY[0] + matrixSize) % matrixSize;

• Menu navigation

• Lcd(brightness pin, A) on pin 3 interferes with the buzzer, so I had to move it to pin 6.

Images