前言
已逝的鳥山明畫家，曾畫出許多知名的漫畫作品，如《怪博士與機器娃娃》和《七龍珠》…等，而這些作品深深著影響著我們，並陪伴著我們長大，變成我們的童年回憶。
本篇文章，要在Arduino 首次接觸就上手的OLED螢幕中，重現鳥山明的經典作品。從基礎的圖像處理到數據轉換，到最終的OLED顯示技術，我們將一步步引導你完成這個有趣的項目。
如果是新手或初學者想要知道有關《Arduino首次接觸就上手》基本操作的相關文章，可以移駕到
| 撰寫/攝影 | 許鈺莨 | ||
| 時間 | 30分鐘 | 材料表
(購買) |
|
| 難度 | 2（滿分5） | ||
本文
第一步：網路上下載七龍珠經典圖片
1.圖片搜尋
筆者是以Google搜尋的圖片，請輸入:七龍珠孫悟空黑白圖片。圖片不一定是七龍珠啦~讀者也可以找到喜歡的圖。但請注意，關鍵字一定要有”黑白圖片”，因為《Arduino首次接觸就上手》的OLED是單色的模組，顯示會較清楚。
2.開啟圖像畫面及截圖
另外要注意的一點是，OLED模組像素為128×64，顯示為長方形，所以盡量找橫向顯示的圖，如果找直向顯示的圖，如:悟空的站立圖，之後顯示會變很扁，不過可以用圖片軟體來旋轉角度。
基於很多都是悟空的站立圖，所以筆者找到顯示DRAGONBALL圖片(下方紅框處)，打算用截圖出來，但在這邊截圖會變成很小。
所以要顯示正常大小的圖形畫面，可對圖形按右鍵>複製圖片網址
再把網址貼上網址列，就可以還原圖片大小。
再來截圖，可以使用Windows內建的截圖功能，Home+Shift+S三鍵一起按就可以截圖。
如下圖所示。
第二步：改變圖像尺寸
1.使用小畫家
選檔案>開啟舊檔>開啟圖片
2.改變圖片尺寸
因OLED的尺寸為128×64個像素，所以必須要更改圖片像素的尺寸。
選常用>調整大小
然後選像素，水平欄位寫128，垂直欄位寫入64。另外，不要勾選維持外觀比例。
3.另存新檔
另存新檔成單色點陣圖
第三步：下載並安裝Image2Lcd軟體
1.下載並安裝Image2Lcd軟體
Image2Lcd是一款可將圖像轉換為LCD 顯示器格式的軟體，當然有很多種作法，只要最後可以轉換成 XBM 格式檔案即可。
下載Image2Lcd軟體 (請按我)
2.預覽圖像畫面
開啟圖片後，右側可以預覽圖片，有圖片旋轉及顏色反轉之功能。
3.保存為 XBM 格式檔案
【注意】這裡必須要把位元組內象素數據反序勾選起來，否則OLED的圖會很破碎，再選擇保存。
之後就會產生圖片的 XBM 格式了，再將當中的像素陣列程式寫入到Arduino程式碼當中即可。
第四步：使用Arduino IDE燒錄
要在OLED模組顯示圖形，必須要使用到U8g2lib.h的函式庫 (Hangeekduino 已有內建)。所以只能用Arduino IDE撰寫，而HanGeekduino圖形化的OLED積木程式中，採用的是U8x8lib.h的函式庫，此函式庫只能顯示文字，而不行繪製圖形。
1.開啟程式
路徑位置在HanGeekduino\BlocklyDuino3\arduino-1.8.5
再開啟arduino.exe即可。
開啟名為Arduino_OLED.ino程式，程式連結(請按我)
完整程式如下
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message=”Arduino_OLED.ino” highlight=”13-76″ provider=”manual”/]
2.上傳程式
取代像素陣列程式，即下方黃色部份，並燒錄上傳至《Arduino首次接觸就上手》
實體效果
程式上傳完成後，就會看見圖示顯示在OLED上面。
結語
恭喜完成了在《Arduino首次接觸就上手》的OLED模組完成進階實作，這當中建議找黑白色的圖，成功完整顯示機率才比較高。其實，OLED模組不僅可以單純的顯示文字，透過這些步驟，還可以在OLED模組中顯示想要的圖案，是不是很棒呢?
未來還有更多《Arduino首次接觸就上手》的主題喔，敬請各位讀者期待，我們下次見!
