TFT液晶でライフゲーム。

matrix.ino

#include <Adafruit_GFX.h>
#include <gfxfont.h>

#include <Adafruit_TFTLCD.h>
#include <pin_magic.h>
#include <registers.h>


// The control pins for the LCD can be assigned to any digital or
// analog pins...but we'll use the analog pins as this allows us to
// double up the pins with the touch screen (see the TFT paint example).
#define LCD_CS A3 // Chip Select goes to Analog 3
#define LCD_CD A2 // Command/Data goes to Analog 2
#define LCD_WR A1 // LCD Write goes to Analog 1
#define LCD_RD A0 // LCD Read goes to Analog 0

#define LCD_RESET A4 // Can alternately just connect to Arduino's reset pin

// When using the BREAKOUT BOARD only, use these 8 data lines to the LCD:
// For the Arduino Uno, Duemilanove, Diecimila, etc.:
//   D0 connects to digital pin 8  (Notice these are
//   D1 connects to digital pin 9   NOT in order!)
//   D2 connects to digital pin 2
//   D3 connects to digital pin 3
//   D4 connects to digital pin 4
//   D5 connects to digital pin 5
//   D6 connects to digital pin 6
//   D7 connects to digital pin 7
// For the Arduino Mega, use digital pins 22 through 29
// (on the 2-row header at the end of the board).

// Assign human-readable names to some common 16-bit color values:
#define  BLACK   0x0000
#define BLUE    0x001F
#define RED     0xF800
#define GREEN   0x07E0
#define CYAN    0x07FF
#define MAGENTA 0xF81F
#define YELLOW  0xFFE0
#define WHITE   0xFFFF

Adafruit_TFTLCD tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET);

boolean cells[8][8] = {
  { false, true, false, false, false, false, false, false },
  { false, true, false, true, false, false, false, false },
  { false, true, true, 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 },
};

void next_generation() {
    boolean new_cells[8][8] = {
      { 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, false, false, false, false, false },
      { false, false, false, false, false, false, false, false },  
    };

    for (int x = 0; x < 8; x++) {
        for (int y = 0; y < 8; y++) {
          new_cells[y][x] = next_generation_cell(x, y);
        }
    }

    for (int x = 0; x < 8; x++) {
        for (int y = 0; y < 8; y++) {
            cells[y][x] = new_cells[y][x];
        }
    }
}

int neighbors(int x, int y) {
    int n = 0;
    int _x = 0;
    int _y = 0;

    // left
    _x = (x == 0) ? 7: (x - 1);
    _y = y;
    if (is_alive(_x, _y)) {
        n += 1;
    }

    // right
    _x = (x == 7) ? 0: (x + 1);
    _y = y;
    if (is_alive(_x, _y)) {
        n += 1;
    }

    // up
    _x = x;
    _y = (y == 0) ? 7: y - 1;
    if (is_alive(_x, _y)) {
        n += 1;
    }

    // down
    _x = x;
    _y = (y == 7) ? 0: y + 1;
    if (is_alive(_x, _y)) {
        n += 1;
    }

    // upleft
    _x = (x == 0) ? 7: (x - 1);
    _y = (y == 0) ? 7: y - 1;
    if (is_alive(_x, _y)) {
        n += 1;
    }

    // upright
    _x = (x == 7) ? 0: (x + 1);
    _y = (y == 0) ? 7: y - 1;
    if (is_alive(_x, _y)) {
        n += 1;
    }

    // downleft
    _x = (x == 0) ? 7: (x - 1);
    _y = (y == 7) ? 0: y + 1;
    if (is_alive(_x, _y)) {
        n += 1;
    }

    // downright
    _x = (x == 7) ? 0: (x + 1);
    _y = (y == 7) ? 0: y + 1;
    if (is_alive(_x, _y)) {
        n += 1;
    }

    return n;
}

boolean is_alive(int x, int y) {
  return cells[y][x];
}

boolean next_generation_cell(int x, int y) {
    if (is_alive(x, y)) {
        if (neighbors(x, y) < 2 || neighbors(x, y) >= 4) {
            // 2未満、4以上は死
            return false;
        } else {
            // それ以外はそのまま
            return true;
        }
    } else {
        if (neighbors(x, y) == 3) {
            // 3の場合は誕生
            return true;
        } else {
            // それ以外はそのまま
            return false;
        }
    }
}

void randomCell() {
    // ランダムで初期化
    for (int x = 0; x < 8; x++) {
        for (int y = 0; y < 8; y++) {
          cells[y][x] = random(2) == 0;
        }
    }
}
void setup(void) {
  Serial.begin(9600);
  Serial.println(F("TFT LCD test"));

#ifdef USE_ADAFRUIT_SHIELD_PINOUT
  Serial.println(F("Using Adafruit 2.8\" TFT Arduino Shield Pinout"));
#else
  Serial.println(F("Using Adafruit 2.8\" TFT Breakout Board Pinout"));
#endif

  Serial.print("TFT size is "); Serial.print(tft.width()); Serial.print("x"); Serial.println(tft.height());

  tft.reset();

  uint16_t identifier = tft.readID();

  if(identifier == 0x9325) {
    Serial.println(F("Found ILI9325 LCD driver"));
  } else if(identifier == 0x9328) {
    Serial.println(F("Found ILI9328 LCD driver"));
  } else if(identifier == 0x7575) {
    Serial.println(F("Found HX8347G LCD driver"));
  } else if(identifier == 0x9341) {
    Serial.println(F("Found ILI9341 LCD driver"));
  } else if(identifier == 0x8357) {
    Serial.println(F("Found HX8357D LCD driver"));
  } else {
    Serial.print(F("Unknown LCD driver chip: "));
    Serial.println(identifier, HEX);
    Serial.println(F("If using the Adafruit 2.8\" TFT Arduino shield, the line:"));
    Serial.println(F("  #define USE_ADAFRUIT_SHIELD_PINOUT"));
    Serial.println(F("should appear in the library header (Adafruit_TFT.h)."));
    Serial.println(F("If using the breakout board, it should NOT be #defined!"));
    Serial.println(F("Also if using the breakout, double-check that all wiring"));
    Serial.println(F("matches the tutorial."));
    return;
  }

  tft.begin(identifier);

  Serial.println(F("Benchmark                Time (microseconds)"));

  tft.fillScreen(WHITE);

  randomSeed(analogRead(0));  
  //randomCell();
}

void loop() {
  int n = 25;
  
  // put your main code here, to run repeatedly:
  // 枠だけ描画
  for (int w=0; w<8; w++) {
    for (int h=0; h<8; h++) {
      int left_start = 10;
      int top_start = 10;
      tft.drawRect(w * (n + 1) + left_start, h * (n + 1) + top_start, n, n, BLACK);      
    }
  }

  // 生きてるセルを描画
  for (int w=0; w<8; w++) {
    for (int h=0; h<8; h++) {
      int left_start = 10;
      int top_start = 10;
      if (cells[h][w] == true) {
        tft.fillRect(w * (n + 1) + left_start + 1, h * (n + 1) + top_start + 1, n-2, n-2, BLACK);      
      } else {
        tft.fillRect(w * (n + 1) + left_start + 1, h * (n + 1) + top_start + 1, n-2, n-2, WHITE);      
      }
    }
  }

  next_generation();
  
  delay(250);
}