carrot-game/carrot_game/carrot_game.ino

#include <Arduino.h>
#include <SPI.h>
#include <U8g2lib.h>
#include <Wire.h>
#include <ArduinoNunchuk.h>
#include <Tone.h>
#include "bitmap.h"
#include "sound.h"

const short initX = 0;
const short initY = 48;

const unsigned long display_interval = 100;
const unsigned long nunchuk_interval = 100;
const unsigned int sound_tempo = 10;

U8G2_ST7920_128X64_2_SW_SPI u8g2(U8G2_R0, /* clock=*/ 2, /* data=*/ 10, /* cs=*/ 7);
//A5 A4 A3 A2
ArduinoNunchuk nunchuk = ArduinoNunchuk();
Tone tone1;

short posX = initX;
short posY = initY;
unsigned int nextLaneY = initY - 16;
unsigned long last_display = millis();
unsigned long last_nunchuck = millis();
unsigned long last_note = millis();
unsigned long next_note = millis();

short notes_index = 0;
short intro_size = sizeof(notes_intro)/sizeof(notes_intro[0]);
short fishes[8][2] = {{random(128,255) , 32}, {random(128,255) , 32}, {random(128,255),48}, {random(128,255),48}, {random(128,255),16}, {random(128,255),16}, {random(128,255),1}, {random(128,255) , 1} };
bool game_init = true;
bool jump = false;
bool jumpBack = false;
bool jumpInProgress = false;
int score = 50;

//set A3 and A2 has +5V / GND
void nunchuck_setpowerpins()
{
    #define pwrpin PORTC3
    #define gndpin PORTC2
    DDRC |= _BV(pwrpin) | _BV(gndpin);
    PORTC &=~ _BV(gndpin);
    PORTC |=  _BV(pwrpin);
    delay(100);  // wait for things to stabilize        
}

void setup(void) {

	Serial.begin(115200);
  nunchuck_setpowerpins();
  nunchuk.init();

  u8g2.begin();

  tone1.begin(8);

}

void play_intro(){
  if(millis() >= next_note){
    next_note = millis() + interval_intro[notes_index];
    tone1.play(notes_intro[notes_index], interval_intro[notes_index]);
    if(notes_index < intro_size - 1){
      notes_index++;
    }
    //else{
    //  notes_index = 0;
    //}
  }
}

void display_welcome_page() {
  u8g2.setFont(u8g2_font_5x7_mf);
  u8g2.drawStr(0, 7, "Welcome to Carrot game!");
  u8g2.drawStr(15, 25, "Press Z to start.");
  u8g2.drawXBMP(posX, posY, 16, 16, fish);
}

void display_game() {
  u8g2.setFont(u8g2_font_5x7_mf);
  char score_str[] = "000";
  sprintf(score_str, "%03d", score);
  u8g2.drawStr(110, 62, score_str);
  for (int i = 0; i < 8; i++) {
    if(fishes[i][0] != NULL){
      u8g2.drawXBMP(fishes[i][0], fishes[i][1], 16, 16, fish_reverse);
    }
  }
  u8g2.drawXBMP(posX, posY, 16, 16, carrot);

  
  //swimelanes
  u8g2.drawHLine(0, 0, 128); //top
  u8g2.drawHLine(0, 16, 128);
  u8g2.drawHLine(0, 32, 128); 
  u8g2.drawHLine(0, 48, 128);
  u8g2.drawHLine(0, 63, 128); //bottom
}

void compute_fishes_position(){
  for (int i = 0; i < 8; i++) {
    if(fishes[i][0] != NULL){
      if(fishes[i][0] <= 2)
      {
        fishes[i][0] = 128;
        score = score - 10;
        tone1.play(NOTE_B1,300);
        if (score <= 0){
          tone1.play(NOTE_G1,300);
          tone1.play(NOTE_F1,300);
          tone1.play(NOTE_E1,300);
          tone1.play(NOTE_D1,300);
          tone1.play(NOTE_C1,300);
          game_init = true;
        }
      }
      else{
        fishes[i][0] = fishes[i][0] - (200 + score)/100;
      }
      //does carrot eat the fish
      if( (posX > (fishes[i][0] - 8) && posX < (fishes[i][0] + 8)  ) && (posY > (fishes[i][1] - 8) && posY < (fishes[i][1] + 8)  )){
        fishes[i][0] = random(128,255);
        tone1.play(NOTE_B5,100);
        score = score + 10;

      }
      Serial.print("score: ");
      Serial.println(score);
    }
  }
}
void compute_cat_position() {
  if (game_init) {
    if (posX < 112) {
      posX = posX + 2;
    }
    else {
      posX = initX;
      if (posY < 48) {
        posY = posY + 16;
      } else {
        posY = initY;
      }
    }
  }
  //game
  else {
    //compute X pos
    if (nunchuk.analogX < 120 && posX >= 4) {
      if (nunchuk.analogX < 80) {
        if(posX >= 8){
          posX = posX - 8;
        }else{
          posX = posX - 4;
        }
        
      } else {
        posX = posX - 4;
      }
    }
    if (nunchuk.analogX > 140 && posX < 112) {
      if (nunchuk.analogX > 180) {
        posX = posX + 8;
      } else {
        posX = posX + 4;
      }
    }
    //compute jump
    //detect a new jump
    if(nunchuk.zButton == 1 && !jump && !jumpBack && posY > 0){
        Serial.println("jump!");
        //tone1.play(NOTE_B4,500);
        jump = true;
        jumpInProgress = true;
        nextLaneY = posY - 16;
        posY = posY - 4;
        Serial.println(nextLaneY);
    }
    else {
      //continue a current jump
      if (jump) {
        
        if (posY > nextLaneY && jumpInProgress) {
          posY = posY - 4;
        } else {
          if (posY != nextLaneY){
            jumpInProgress = false;
            posY = posY + 4;
          }
          else{
            jump = false;
          }
        }
      }
    }

    if(nunchuk.cButton == 1 && !jump && !jumpBack && posY < 48){
        Serial.println("jump bottom!");
        //tone1.play(NOTE_B2,500);
        jumpBack = true;
        jumpInProgress = true;
        nextLaneY = posY + 16;
        posY = posY + 4;
        Serial.println(nextLaneY);
    }
    else {
      //continue a current jump
      if (jumpBack) {
        
        if (posY < nextLaneY && jumpInProgress) {
          posY = posY + 4;
        } else {
          if (posY != nextLaneY){
            jumpInProgress = false;
            posY = posY - 4;
          }
          else{
            jumpBack = false;
          }
        }
      }
    }
    
  }
}

void loop(void) {
  if(millis() - last_display >= display_interval){
    u8g2.firstPage();
    do {
      if(game_init){
        display_welcome_page();
        score = 50;
      } else{
        display_game();
      }
      
    } while ( u8g2.nextPage() );
    last_display = millis();
  }
  if(millis() - last_nunchuck >= nunchuk_interval){
    nunchuk.update();
    if(init){
      if(nunchuk.zButton == 1){
        if(game_init){
          game_init = false;
          //set default pos to avoid issue
          posX = initX;
          posY = initY;
        }
      }
    }

    last_nunchuck = millis();
    if(game_init){
      play_intro();
    }
    else{
      compute_cat_position();
      compute_fishes_position();
    }
  }
  // Serial.print(posX);
  // Serial.print(' ');
  // Serial.println(posY);
  // Serial.print(nunchuk.analogX, DEC);
  // Serial.print(' ');
  // Serial.println(nunchuk.analogY, DEC);
  //Serial.print(' ');
  // Serial.print(nunchuk.accelX, DEC);
  // Serial.print(' ');
  // Serial.print(nunchuk.accelY, DEC);
  // Serial.print(' ');
  // Serial.print(nunchuk.accelZ, DEC);
  // Serial.print(' ');
  // Serial.print(nunchuk.zButton, DEC);
  // Serial.print(' ');
  // Serial.println(nunchuk.cButton, DEC);
  //delay(interval);
    
}