5-Button OLED Mini Game Deck

#include <Arduino.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SH110X.h>


enum Btn { OK, UP, DOWN, LEFT, RIGHT };

enum Game { MENU, DASH, TETRIS, FLAPPY, SNAKE, PONG_DIFFICULTY, PONG, ASTEROIDS };


// Forward declarations

// Forward declarations
void resetPongBall(int8_t direction);

bool pressed(Btn b);
void title(const __FlashStringHelper*s);
void showBootAnimation();
void home();
const __FlashStringHelper* name(uint8_t n);
void drawMenu();
void beginDash();
void newDashObstacle();
void drawDash();
void runDash();
bool blockAt(uint8_t p,uint8_t r,uint8_t x,uint8_t y);
bool fits(int8_t nx,int8_t ny,uint8_t nr);
void spawnTet();
void beginTetris();
void lockTet();
void drawTetris();
void runTetris();
void beginFlappy();
void drawFlappy();
void runFlappy();
void beginSnake();
void drawSnake();
void runSnake();
void beginPongDifficulty();
void drawPongDifficulty();
void runPongDifficulty();
void beginPong();
void drawPong();
void runPong();
void beginAsteroids();
void drawAsteroids();
void runAsteroids();

const uint8_t pins[]={2,3,4,5,6};


Adafruit_SH1106G display(128,64,&Wire,-1);
bool lastRead[5],stable[5]; uint32_t changed[5],lastFrame;
Game game=MENU; uint8_t choice=0; bool over=false; uint16_t score=0;

bool pressed(Btn b){uint8_t i=b;bool r=digitalRead(pins[i]);if(r!=lastRead[i])changed[i]=millis();bool hit=false;if(millis()-changed[i]>25&&r!=stable[i]){stable[i]=r;hit=(r==LOW);}lastRead[i]=r;return hit;}
void title(const __FlashStringHelper*s){display.setTextSize(1);display.setTextColor(SH110X_WHITE);display.setCursor(1,1);display.print(s);}
void showBootAnimation(){
  // Startup screen: static text is redrawn only as the loading bar advances.
  for(uint8_t fill=0;fill<=100;fill+=5){
    display.clearDisplay();
    display.setTextColor(SH110X_WHITE);
    display.setTextSize(1);
    display.setCursor(14,9);
    display.print(F("Welcome to the"));
    display.setTextSize(2);
    display.setCursor(17,22);
    display.print(F("GAME DECK"));
    display.drawRect(14,51,100,8,SH110X_WHITE);
    uint8_t barWidth=(uint16_t)96*fill/100;
    display.fillRect(16,53,barWidth,4,SH110X_WHITE);
    display.setTextSize(1);
    display.setCursor(51,41);
    display.print(F("LOADING"));
    display.display();
    delay(55);
  }
  delay(250);
}
void home(){game=MENU;lastFrame=millis();}
const __FlashStringHelper* name(uint8_t n){switch(n){case 0:return F("TINY DASH");case 1:return F("TETRIS");case 2:return F("FLAPPY DOT");case 3:return F("SNAKE");case 4:return F("PONG");default:return F("ASTEROIDS");}}
void drawMenu(){display.clearDisplay();display.setTextSize(2);display.setCursor(14,1);display.print(F("GAME DECK"));uint8_t first=(choice/3)*3;display.setTextSize(1);for(uint8_t r=0;r<3;r++){uint8_t n=first+r;if(n>=6)break;display.setCursor(3,27+r*12);display.print(n==choice?F("> "):F("  "));display.print(name(n));}display.display();}

// Tiny Dash: endless 10-point levels. Obstacle styles repeat, while every level runs a little faster.
int16_t dashY,dashV,dashX;uint8_t dashH,dashW;uint16_t level;
void beginDash(){game=DASH;dashY=47;dashV=0;dashX=132;dashH=8;dashW=6;level=1;score=0;over=false;lastFrame=millis();}
void newDashObstacle(){level=score/10+1;uint8_t style=(level-1)%5+1;dashX=128+random(10,28);dashW=(style==2?10:6);dashH=(style==3?14:(style==4?6:random(7,13)));}
void drawDash(){display.clearDisplay();title(F("DASH"));display.setCursor(38,1);display.print(F("L"));display.print(level);display.setCursor(84,1);display.print(score);display.drawFastHLine(0,55,128,SH110X_WHITE);display.fillRect(18,dashY,8,8,SH110X_WHITE);display.fillRect(dashX,55-dashH,dashW,dashH,SH110X_WHITE);if(((level-1)%5+1)==4&&dashX<70)display.drawPixel(dashX+2,42,SH110X_WHITE);if(over){display.setCursor(32,28);display.print(F("CRASH - UP"));}display.display();}
void runDash(){if(pressed(OK)){home();drawMenu();return;}if(over){if(pressed(UP))beginDash();return;}if(pressed(UP)&&dashY==47)dashV=-9;uint8_t frameDelay=60-min((uint16_t)(level-1),(uint16_t)35);if(millis()-lastFrame<frameDelay)return;lastFrame=millis();dashY+=dashV;dashV++;if(dashY>=47){dashY=47;dashV=0;}dashX-=3;if(dashX<-dashW){score++;newDashObstacle();}if(26>dashX&&18<dashX+dashW&&dashY+8>55-dashH)over=true;drawDash();}

// Tetris: seven-wide well, Up rotates, directions move/drop.
const int8_t shapes[7][4][4]={{{0,1,0,0},{1,1,1,0},{0,0,0,0},{0,0,0,0}},{{1,1,0,0},{0,1,1,0},{0,0,0,0},{0,0,0,0}},{{0,1,1,0},{1,1,0,0},{0,0,0,0},{0,0,0,0}},{{1,0,0,0},{1,1,1,0},{0,0,0,0},{0,0,0,0}},{{0,0,1,0},{1,1,1,0},{0,0,0,0},{0,1,0,0}},{{1,1,0,0},{1,1,0,0},{0,0,0,0},{0,0,0,0}},{{1,1,1,1},{0,0,0,0},{0,0,0,0},{0,0,0,0}}};
uint8_t board[10][7],piece,rot;int8_t tx,ty;
bool blockAt(uint8_t p,uint8_t r,uint8_t x,uint8_t y){uint8_t sx=x,sy=y;for(uint8_t i=0;i<r;i++){uint8_t t=sx;sx=3-sy;sy=t;}return shapes[p][sy][sx];}
bool fits(int8_t nx,int8_t ny,uint8_t nr){for(uint8_t y=0;y<4;y++)for(uint8_t x=0;x<4;x++)if(blockAt(piece,nr,x,y)&&(nx+x<0||nx+x>=7||ny+y>=10||(ny+y>=0&&board[ny+y][nx+x])))return false;return true;}
void spawnTet(){piece=random(0,7);rot=0;tx=2;ty=-1;if(!fits(tx,ty,rot))over=true;}
void beginTetris(){game=TETRIS;memset(board,0,sizeof(board));score=0;over=false;spawnTet();lastFrame=millis();}
void lockTet(){for(uint8_t y=0;y<4;y++)for(uint8_t x=0;x<4;x++)if(blockAt(piece,rot,x,y)&&ty+y>=0)board[ty+y][tx+x]=1;for(int8_t y=9;y>=0;y--){bool full=true;for(uint8_t x=0;x<7;x++)if(!board[y][x])full=false;if(full){for(int8_t yy=y;yy>0;yy--)memcpy(board[yy],board[yy-1],7);memset(board[0],0,7);score+=10;y++;}}spawnTet();}
void drawTetris(){display.clearDisplay();title(F("TETRIS"));display.setCursor(67,1);display.print(score);for(uint8_t y=0;y<10;y++)for(uint8_t x=0;x<7;x++)if(board[y][x])display.fillRect(36+x*6,12+y*5,5,4,SH110X_WHITE);for(uint8_t y=0;y<4;y++)for(uint8_t x=0;x<4;x++)if(blockAt(piece,rot,x,y)&&ty+y>=0)display.fillRect(36+(tx+x)*6,12+(ty+y)*5,5,4,SH110X_WHITE);display.drawRect(35,11,44,52,SH110X_WHITE);if(over){display.setCursor(83,29);display.print(F("OVER"));display.setCursor(82,38);display.print(F("UP"));}display.display();}
void runTetris(){if(pressed(OK)){home();drawMenu();return;}if(over){if(pressed(UP))beginTetris();return;}if(pressed(LEFT)&&fits(tx-1,ty,rot))tx--;if(pressed(RIGHT)&&fits(tx+1,ty,rot))tx++;if(pressed(UP)&&fits(tx,ty,(rot+1)%4))rot=(rot+1)%4;if(pressed(DOWN)&&fits(tx,ty+1,rot))ty++;if(millis()-lastFrame<450)return;lastFrame=millis();if(fits(tx,ty+1,rot))ty++;else lockTet();drawTetris();}

int16_t py,vy,ox,oy,px;int8_t sx[32],sy[32],slen,dx,dy,foodX,foodY;int16_t ballX; int8_t ballY,ballVX,ballVY,leftY,rightY;int16_t shipX,shipY,rockX,rockY,shotX,shotY;int8_t rockVX,rockVY;bool shot;
void beginFlappy(){game=FLAPPY;py=30;vy=0;ox=128;oy=random(14,37);score=0;over=false;lastFrame=millis();}
void drawFlappy(){display.clearDisplay();title(F("FLAPPY"));display.setCursor(70,1);display.print(score);display.fillCircle(25,py,4,SH110X_WHITE);display.fillRect(ox,12,6,oy-12,SH110X_WHITE);display.fillRect(ox,oy+23,6,64-oy-23,SH110X_WHITE);if(over){display.setCursor(31,30);display.print(F("BONK - UP"));}display.display();}
void runFlappy(){if(pressed(OK)){home();drawMenu();return;}if(over){if(pressed(UP))beginFlappy();return;}if(pressed(UP))vy=-5;if(millis()-lastFrame<50)return;lastFrame=millis();py+=vy;vy++;ox-=3;if(ox<-6){ox=128;oy=random(14,33);score++;}if(py<12||py>59||(29>ox&&21<ox+6&&(py-4<oy||py+4>oy+23)))over=true;drawFlappy();}
void beginSnake(){game=SNAKE;slen=4;dx=1;dy=0;for(int i=0;i<slen;i++){sx[i]=8-i;sy[i]=4;}foodX=random(1,15);foodY=random(2,7);score=0;over=false;lastFrame=millis();}
void drawSnake(){display.clearDisplay();title(F("SNAKE"));display.setCursor(70,1);display.print(score);for(int i=0;i<slen;i++)display.fillRect(sx[i]*8,sy[i]*8,6,6,SH110X_WHITE);display.drawRect(foodX*8,foodY*8,6,6,SH110X_WHITE);if(over){display.setCursor(33,30);display.print(F("HIT - UP"));}display.display();}
void runSnake(){if(pressed(OK)){home();drawMenu();return;}if(over){if(pressed(UP))beginSnake();return;}if(pressed(UP)&&dy==0){dx=0;dy=-1;}if(pressed(DOWN)&&dy==0){dx=0;dy=1;}if(pressed(LEFT)&&dx==0){dx=-1;dy=0;}if(pressed(RIGHT)&&dx==0){dx=1;dy=0;}if(millis()-lastFrame<180)return;lastFrame=millis();for(int i=slen-1;i>0;i--){sx[i]=sx[i-1];sy[i]=sy[i-1];}sx[0]+=dx;sy[0]+=dy;if(sx[0]<0||sx[0]>15||sy[0]<2||sy[0]>7)over=true;for(int i=1;i<slen;i++)if(sx[0]==sx[i]&&sy[0]==sy[i])over=true;if(sx[0]==foodX&&sy[0]==foodY){score++;if(slen<32)slen++;foodX=random(1,15);foodY=random(2,7);}drawSnake();}
uint8_t pongDifficulty=5,playerPoints=0,cpuPoints=0,pongAiTick=0;
void beginPongDifficulty(){game=PONG_DIFFICULTY;lastFrame=millis();}
void drawPongDifficulty(){display.clearDisplay();title(F("PONG"));display.setCursor(42,19);display.print(F("LEVEL"));display.setTextSize(2);display.setCursor(59,32);display.print(pongDifficulty);display.setTextSize(1);display.setCursor(20,53);display.print(F("UP/DOWN  OK START"));display.display();}
void runPongDifficulty(){if(pressed(OK)){beginPong();return;}if(pressed(UP)||pressed(RIGHT)){if(pongDifficulty<10)pongDifficulty++;drawPongDifficulty();}if(pressed(DOWN)||pressed(LEFT)){if(pongDifficulty>1)pongDifficulty--;drawPongDifficulty();}}
void resetPongBall(int8_t direction){ballX=64;ballY=32;uint8_t ballSpeed=1+(pongDifficulty-1)/3;ballVX=direction*ballSpeed;ballVY=random(0,2)?1:-1;}
void beginPong(){game=PONG;leftY=27;rightY=27;playerPoints=0;cpuPoints=0;pongAiTick=0;score=0;over=false;resetPongBall(random(0,2)?1:-1);lastFrame=millis();}
void drawPong(){display.clearDisplay();title(F("PONG"));display.setCursor(55,1);display.print(playerPoints);display.print(F(" - "));display.print(cpuPoints);display.fillRect(3,leftY,3,15,SH110X_WHITE);display.fillRect(122,rightY,3,15,SH110X_WHITE);display.fillCircle(ballX,ballY,2,SH110X_WHITE);if(over){display.setCursor(28,27);display.print(playerPoints>=7?F("YOU WIN!"):F("CPU WINS"));display.setCursor(34,39);display.print(F("UP REMATCH"));}display.display();}
void runPong(){if(pressed(OK)){home();drawMenu();return;}if(over){if(pressed(UP))beginPong();return;}if(pressed(UP)&&leftY>11)leftY-=4;if(pressed(DOWN)&&leftY<49)leftY+=4;if(millis()-lastFrame<45)return;lastFrame=millis();ballX+=ballVX;ballY+=ballVY;if(ballY<12||ballY>61)ballVY=-ballVY;const uint8_t aiPeriod=5;if(++pongAiTick>=aiPeriod){pongAiTick=0;int8_t target=ballY;if(target>rightY+8&&rightY<49)rightY+=2;if(target<rightY+7&&rightY>11)rightY-=2;}if(ballX<8&&ballY>=leftY-2&&ballY<=leftY+17){ballVX=abs(ballVX);ballVY+=random(-1,2);ballVY=constrain(ballVY,-2,2);if(ballVY==0)ballVY=1;}if(ballX>119&&ballY>=rightY-2&&ballY<=rightY+17){ballVX=-abs(ballVX);ballVY+=random(-1,2);ballVY=constrain(ballVY,-2,2);if(ballVY==0)ballVY=1;}if(ballX<0){cpuPoints++;if(cpuPoints>=7)over=true;else resetPongBall(1);}if(ballX>127){playerPoints++;if(playerPoints>=7)over=true;else resetPongBall(-1);}drawPong();}
void beginAsteroids(){game=ASTEROIDS;shipX=64;shipY=45;rockX=20;rockY=18;rockVX=1;rockVY=1;shot=false;score=0;over=false;lastFrame=millis();}
void drawAsteroids(){display.clearDisplay();title(F("ASTEROIDS"));display.setCursor(80,1);display.print(score);display.drawTriangle(shipX,shipY-5,shipX-5,shipY+5,shipX+5,shipY+5,SH110X_WHITE);display.drawCircle(rockX,rockY,5,SH110X_WHITE);if(shot)display.drawPixel(shotX,shotY,SH110X_WHITE);if(over){display.setCursor(34,30);display.print(F("BOOM - UP"));}display.display();}
void runAsteroids(){if(pressed(OK)){home();drawMenu();return;}if(over){if(pressed(UP))beginAsteroids();return;}if(pressed(LEFT)&&shipX>7)shipX-=4;if(pressed(RIGHT)&&shipX<120)shipX+=4;if(pressed(UP)&&shipY>15)shipY-=3;if(pressed(DOWN)&&shipY<58)shipY+=3;if(millis()-lastFrame<55)return;lastFrame=millis();if(!shot){shot=true;shotX=shipX;shotY=shipY-6;}rockX+=rockVX;rockY+=rockVY;if(rockX<5||rockX>123)rockVX=-rockVX;if(rockY<14||rockY>59)rockVY=-rockVY;if(shot){shotY-=5;if(shotY<10)shot=false;if(abs(shotX-rockX)<7&&abs(shotY-rockY)<7){score++;shot=false;rockX=random(10,118);rockY=15;}}if(abs(shipX-rockX)<8&&abs(shipY-rockY)<8)over=true;drawAsteroids();}
void setup(){for(uint8_t i=0;i<5;i++){pinMode(pins[i],INPUT_PULLUP);lastRead[i]=stable[i]=digitalRead(pins[i]);changed[i]=0;}Wire.begin();display.begin(0x3C,true);randomSeed(micros());showBootAnimation();drawMenu();}
void loop(){if(game==MENU){if(pressed(UP)||pressed(LEFT)){choice=(choice+5)%6;drawMenu();}if(pressed(DOWN)||pressed(RIGHT)){choice=(choice+1)%6;drawMenu();}if(pressed(OK)){switch(choice){case 0:beginDash();break;case 1:beginTetris();break;case 2:beginFlappy();break;case 3:beginSnake();break;case 4:beginPongDifficulty();drawPongDifficulty();break;default:beginAsteroids();}}return;}if(game==DASH)runDash();else if(game==TETRIS)runTetris();else if(game==FLAPPY)runFlappy();else if(game==SNAKE)runSnake();else if(game==PONG_DIFFICULTY)runPongDifficulty();else if(game==PONG)runPong();else runAsteroids();}