--- title: "8X8 LED超大貪食蛇 (MAX7219)" tags: hackpad --- # 8X8 LED超大貪食蛇 (MAX7219) > [點此觀看原始內容](https://openlabtaipei.hackpad.tw/zmhqrqDFdR4) 8X8 LED超大貪食蛇 (MAX7219) ![](https://s3-ap-northeast-1.amazonaws.com/hackmd-public/uploads/406642b4-c571-4beb-9f58-65f9d848e0ff.jpg) 專案概述： 最近到口丁發現鴻旗跟謝老闆超大LED鋁罐燈這個專案，於是起了邪念想要借來玩超大LED貪食蛇，這個改造是可逆的，他還可以還原，只是改寫功能˙。 網路上別人用8x8LED做貪食蛇的實際影片 [http://makerflux.com/wiki/electronics-wiki/development_boards/arduino/arduino-projects/snake-game-with-an-8x8-led-matrix/](http://makerflux.com/wiki/electronics-wiki/development_boards/arduino/arduino-projects/snake-game-with-an-8x8-led-matrix/) 網路上别人用Adafruit 8x8 LED Matrix做好的Snake Game專案文章 =================================================================================                                                STEP ONE 學會自由運用MAX7219的副函式 ================================================================================== 目前˙小弟想要用Adafruit寫好的貪食蛇專案套用到台灣買的到的8X8 LED Matrix上，我目前想到兩個方法： 第一個是把原本Adafruit的matrix.drawpixel換成台灣的setDot(); [https://code.google.com/p/arudino-maxmatrix-library/wiki/Usage](https://code.google.com/p/arudino-maxmatrix-library/wiki/Usage) ↑解釋了所有的函數代表的意思 看來這個指令是可以的→m.setDot(0, 0, HIGH); ![](https://s3-ap-northeast-1.amazonaws.com/hackmd-public/uploads/d796bc97-da92-4753-84b6-9f9e7e6a156e.jpg)  byte CH_A\[\] = { 8,8,B00111000, B01111100, B01111110, B00111111, B00111111,B01111110,B01111100,B00111000 };   m.writeSprite(0, 0, CH_A);  ↑ 顯示各種圖形或是漢字 ![](https://s3-ap-northeast-1.amazonaws.com/hackmd-public/uploads/d623729b-e6e2-4a16-88f2-36fd1a62adee.jpg) 第二個是猜Adafruit的驅動IC也是MAX7219想辦法Debug讓他們相容。 ![](https://s3-ap-northeast-1.amazonaws.com/hackmd-public/uploads/3aae62e6-6ba8-4a1a-b86d-2d509e733726.png) =================================================================================== ```txt STEP TWO 製作Snake game code ``` ===================================================================================== 大致上已經瞭解整個8X8 LED陣列的操作範例，接下來又有兩個出發點 第一個方法是Haker Adafruit的範例碼 // Snake on 8x8Matrix // [#include](https://openlabtaipei.hackpad.tw/ep/search/?q=%23include&via=zmhqrqDFdR4) <MaxMatrix.h> [#include](https://openlabtaipei.hackpad.tw/ep/search/?q=%23include&via=zmhqrqDFdR4) <avr/pgmspace.h> // Button pin const int buttonRightPin = 2; const int buttonLeftPin  = 3; // Game constants // buttons const int RIGHTBUTTON = 0; const int LEFTBUTTON  = 1; // direction const int TOP    = 0; const int RIGHT  = 1; const int BOTTOM = 2; const int LEFT   = 3; // Snake const int MAX\_SNAKE\_LENGTH = 10; // Variables int data = 8;    // DIN pin of MAX7219 module int load = 9;    // CS pin of MAX7219 module int clock = 10;  // CLK pin of MAX7219 module int maxInUse = 1;    //change this variable to set how many MAX7219's you'll use MaxMatrix m(data, load, clock, maxInUse); // define module int direction = TOP;                               // direction of movement int snakeX\[MAX\_SNAKE\_LENGTH\];                      // X-coordinates of snake int snakeY\[MAX\_SNAKE\_LENGTH\];                      // Y-coordinates of snake int snakeLength = 1;                               // nr of parts of snake boolean buttonRead = false;                        // is button already read in this loop unsigned long prevTime = 0;                        // for gamedelay (ms) unsigned long delayTime = 500;                     // Game step in ms int fruitX, fruitY; unsigned long fruitPrevTime = 0; unsigned long fruitBlinkTime = 1000/250; int fruitLed = HIGH; void setup(){   m.init(); // module initialize   m.setIntensity(15); // dot matix intensity 0-15   Serial.begin(9600);   Serial.println("Snake is started");   randomSeed(analogRead(0));   // Init led matrix   //matrix.begin(0x70);   // init buttons   int buttonpins\[\] = {buttonRightPin, buttonLeftPin};   initButtons(buttonpins, 2);   // init snake   snakeX\[0\] = 4;   snakeY\[0\] = 7;   for(int i=1; i<MAX\_SNAKE\_LENGTH; i++){     snakeX\[i\] = snakeY\[i\] = -1;   }   makeFruit(); } void loop(){   checkButtons();   unsigned long currentTime = millis();   if(currentTime - prevTime >= delayTime){     nextstep();     buttonRead = false;     prevTime = currentTime;   }   draw(); } void checkButtons(){   if(!buttonRead){     int currentDirection = direction;     if(buttonClicked(LEFTBUTTON)){       direction--;       if(direction < 0){         direction = LEFT;       }     }     else if(buttonClicked(RIGHTBUTTON)){       direction++;       if(direction > 3){         direction = TOP;       }     }     buttonRead = (currentDirection != direction);   } } void draw(){  m.clear();   drawSnake();   drawFruit(); //  matrix.writeDisplay(); } void drawSnake(){   for(int i=0; i<snakeLength; i++){     //m.setDot(0, 0, HIGH);     m.setDot(snakeX\[i\], snakeY\[i\], HIGH);   } } void drawFruit(){   if(inPlayField(fruitX, fruitY)){     unsigned long currenttime = millis();     if(currenttime - fruitPrevTime >= fruitBlinkTime){       fruitLed = (fruitLed == HIGH) ? LOW : HIGH;       fruitPrevTime = currenttime;     }     m.setDot(fruitX, fruitY, fruitLed);   } } boolean inPlayField(int x, int y){   return (x>=0) && (x<8) && (y>=0) && (y<8); } void nextstep(){   for(int i=snakeLength-1; i>0; i--){     snakeX\[i\] = snakeX\[i-1\];     snakeY\[i\] = snakeY\[i-1\];   }   switch(direction){     case TOP:       snakeY\[0\] = snakeY\[0\]-1;       break;     case RIGHT:       snakeX\[0\] = snakeX\[0\]+1;       break;     case BOTTOM:       snakeY\[0\] = snakeY\[0\]+1;       break;     case LEFT:       snakeX\[0\]=snakeX\[0\]-1;       break;   }   if((snakeX\[0\] == fruitX) && (snakeY\[0\] == fruitY)){     snakeLength++;     if(snakeLength < MAX\_SNAKE\_LENGTH){       makeFruit();     }     else {       fruitX = fruitY = -1;     }   } } void makeFruit(){   int x, y;   x = random(0, 8);   y = random(0, 8);   while(isPartOfSnake(x, y)){     x = random(0, 8);     y = random(0, 8);   }   fruitX = x;   fruitY = y; } boolean isPartOfSnake(int x, int y){   for(int i=0; i<snakeLength-1; i++){     if((x == snakeX\[i\]) && (y == snakeY\[i\])){       return true;     }   }   return false; } 第二個方法是自己寫一個Snake game的code ![](https://s3-ap-northeast-1.amazonaws.com/hackmd-public/uploads/190a2d19-bf40-4124-b501-e8ae0526cc83.png) 有鑑於此，先土炮了一段CODE,大致上會走 測試電路 ![](https://s3-ap-northeast-1.amazonaws.com/hackmd-public/uploads/f2b9493e-7c15-4c8a-ac70-82ef37dac3a4.png) boolean UP = 2; boolean DOWN = 3; boolean RIGHT = 4; boolean LEFT = 5; boolean UP_BOTTOM; boolean DOWN_BOTTOM; booleansnake (1).zip LEFT_BOTTOM; boolean RIGHT_BOTTOM; void loop(){   //=========================================   //                SCAN BUTTOM   //=========================================   UP_BOTTOM= digitalRead(UP);   if(UP_BOTTOM == true)   {     while(UP_BOTTOM)     {       UP_BOTTOM= digitalRead(UP);     }     Serial.println("U");     if(X == 7) X=0;     else X = X + 1;   }  DOWN_BOTTOM= digitalRead(DOWN);  if( DOWN_BOTTOM == true)  {  while(DOWN_BOTTOM)  {     DOWN_BOTTOM= digitalRead(DOWN);  }   Serial.println("D");   if(X == 0) X = 7;   else X = X -1 ;  }  LEFT_BOTTOM= digitalRead(LEFT);  if(LEFT_BOTTOM == true)  {    while(LEFT_BOTTOM)    {      LEFT_BOTTOM= digitalRead(LEFT);    }       Serial.println("L");       if(Y == 7 ) Y=0 ;       else Y=Y+1;  }  RIGHT_BOTTOM= digitalRead(RIGHT);  if(RIGHT_BOTTOM == true)  {  while(RIGHT_BOTTOM)  {    RIGHT_BOTTOM= digitalRead(RIGHT);  }    Serial.println("R");    if(Y == 0 ) Y = 7;    else Y=Y-1;  }  //=====================================================  m.clear();  m.setDot(X, Y, HIGH); } ======================================================================================                          We god a snake game code from Arduino Taipei in Facebook ====================================================================================== ![](https://s3-ap-northeast-1.amazonaws.com/hackmd-public/uploads/8138a7b5-e1e7-4f30-8e64-a5dd9c3a5909.png) [snake (1).zip](https://www.dropbox.com/s/ra41w5yf00fnqmg/snake%20%281%29.zip?dl=0) ↑直接就可以體驗的8x8 snake game code [https://processing.org/download/](https://processing.org/download/) ↑不過要先去下載Processing ===================================================================================== ======================================================================================                                                                   問題與討論 ====================================================================================== 過程中發現幾個問題，雖然都是8x8 LED Matrix，單是光硬體就讓小弟頭痛了。 光硬體結構就可以大致上分成以下三大類別：  ※第一個是大家在台灣的電子商場都可以買到的8X8 LED MATRIX模組如下圖，他是用MAX7219這個驅動IC，走的是I2C的資料傳輸，模組的連接介面有五隻腳，正負電+DIN、CS、CLK，大家要注意在後面三隻腳與ARDUINO的連接，在程式上也要修正，下面有附程式的連結轉貼，正常操作下可以顯示字元，如果要顯示中文，必須先自己建立中文圖庫陣列，在口丁過往專案中有用過可以到FB社群裡求籤，或許會有大神回應。 ![](https://s3-ap-northeast-1.amazonaws.com/hackmd-public/uploads/be637fc1-28c9-447a-838d-c963fcb2eda5.jpg) [http://swf.com.tw/?p=738](http://swf.com.tw/?p=738) ↑這個網址說明得很詳細而且也有現成的範例碼可以用 [https://code.google.com/p/arudino-maxmatrix-library/wiki/Usage](https://code.google.com/p/arudino-maxmatrix-library/wiki/Usage) ↑解釋了所有的函數代表的意思 [MAX7219_5.zip](https://www.dropbox.com/s/dxjzapte9loni9y/MAX7219_5.zip?dl=0) ↑可以用這個檔案來改 軟體使用上大家要特別注意後面三隻腳在程式裡面的定義，還有這一行程式碼，有沒有設定自己所使用8x8陣列數目，這個範例就是串連兩組陣列 → (const byte maxInUse = 2;   // 代表串連兩個MAX7219模組)，接下來要點亮跑英文字與數字倒是沒問題，不過如果要跑中文字就得要自己建一個圖庫了，可以來口丁尋求解決之道。 ※第二個 你有可能從網站上買到高檔貨，Adafruit的LED 8x8 Matrix(如下圖)，要玩貪食蛇用這個硬體最洽當，因為貪食蛇的專案幾乎都建立在這個硬體上面，因為小弟手上沒有這個硬體，所以也沒有多研究。 ![](https://s3-ap-northeast-1.amazonaws.com/hackmd-public/uploads/a64fe4f1-899f-46a7-a022-976e0ef0fec0.jpg) [http://makerflux.com/wiki/electronics-wiki/development_boards/arduino/arduino-projects/snake-game-with-an-8x8-led-matrix/](http://makerflux.com/wiki/electronics-wiki/development_boards/arduino/arduino-projects/snake-game-with-an-8x8-led-matrix/) ↑可以大略跟隨這個網站的做法 記得到GitHub下載他的副函式來使用 [https://github.com/adafruit/Adafruit-LED-Backpack-Library](https://github.com/adafruit/Adafruit-LED-Backpack-Library) [https://github.com/adafruit/Adafruit-GFX-Library](https://github.com/adafruit/Adafruit-GFX-Library) 第三種就是用74系列的邏輯閘各種土炮(如下圖)，個人覺得這個方法最有趣也最浪費時間，不過可理解性最高，程式操作自由度較高，可是最花時間。 ![](https://s3-ap-northeast-1.amazonaws.com/hackmd-public/uploads/61df247f-932f-4f3c-bebe-3b7e89c7f24b.jpg)