查看“Micro:bit系列教程23：Piano for micro:bit”的源代码

<p class="MsoNormal" style="line-height:150%"><span style="font-size:12.0pt;
line-height:150%;font-family:宋体;mso-ascii-theme-font:minor-fareast;mso-fareast-font-family:
宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">本章将介绍为<span lang="EN-US">Micro:bit</span>设计的迷你钢琴音乐扩展板。<span lang="EN-US"></span></span></p>
<h1 style="line-height:150%"><span lang="EN-US" style="font-size:15.0pt;
line-height:150%;font-family:黑体">1.</span><span style="font-size:15.0pt;
line-height:150%;font-family:黑体">基本介绍<span lang="EN-US"></span></span></h1>
<p align="left" class="MsoNormal" style="text-indent: 21pt; line-height: 150%;"><span lang="EN-US" style="font-size:12.0pt;line-height:150%;
font-family:宋体;mso-ascii-theme-font:minor-fareast;mso-fareast-font-family:宋体;
mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">Piano
for micro:bit</span><span style="font-size:12.0pt;line-height:150%;font-family:
宋体;mso-ascii-theme-font:minor-fareast;mso-fareast-font-family:宋体;mso-fareast-theme-font:
minor-fareast;mso-hansi-theme-font:minor-fareast">是基于<span lang="EN-US">micro:bit</span>的迷你钢琴扩展板，板载<span lang="EN-US">TTP229</span>电容触摸芯片，有<span lang="EN-US">13</span>个钢琴键，<span lang="EN-US">4</span>个<span lang="EN-US">RGB</span>灯，通过触摸钢琴键即可实现全八度音阶，同时<span lang="EN-US">RGB LED</span>也会有相应显示。<span lang="EN-US"></span></span></p>
<h1 style="line-height:150%"><span lang="EN-US" style="font-size:15.0pt;
line-height:150%;font-family:黑体">2.</span><span style="font-size:15.0pt;
line-height:150%;font-family:黑体">硬件连接<span lang="EN-US"></span></span></h1>
<p class="MsoNormal" style="line-height:150%"><span lang="EN-US" style="font-size:
12.0pt;line-height:150%;font-family:宋体;mso-ascii-theme-font:minor-fareast;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:
minor-fareast">  </span><span style="font-size:12.0pt;line-height:150%;font-family:宋体;mso-ascii-theme-font:
minor-fareast;mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;
mso-hansi-theme-font:minor-fareast">在硬件上，主要采用<span lang="EN-US">Micro:bit</span>的<span lang="EN-US">I2C</span>接口与该模块连接，通过驱动触摸芯片<span lang="EN-US">TTP229</span>感知琴键触摸情况，并根据触摸情况驱动蜂鸣器与全彩灯，具体引脚连接如下图所示：<span lang="EN-US"></span></span></p>
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<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%;font-family:宋体">Micro:bit</span></p>
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<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%;font-family:宋体">Piano for
  micro:bit</span></p>
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<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%;font-family:宋体">VCC</span></p>
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<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%;font-family:宋体">VCC</span></p>
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<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%;font-family:宋体">GND</span></p>
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<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%;font-family:宋体">GND</span></p>
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<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%;font-family:宋体">SCL</span></p>
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<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%;font-family:宋体">SCL</span></p>
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<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%;font-family:宋体">SDA</span></p>
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<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%;font-family:宋体">SDA</span></p>
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<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%;font-family:宋体">P0</span></p>
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<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span style="font-size:12.0pt;line-height:150%;font-family:宋体">蜂鸣器控制引脚<span lang="EN-US"></span></span></p>
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<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%;font-family:宋体">P1</span></p>
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<p align="center" class="MsoNormal" style="text-align:center;line-height:150%"><span style="font-size:12.0pt;line-height:150%;font-family:宋体">全彩灯的控制引脚<span lang="EN-US"></span></span></p>
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<p class="MsoNormal" style="text-indent:21.0pt;line-height:150%"><span style="font-size:12.0pt;line-height:150%;font-family:宋体;mso-ascii-theme-font:
minor-fareast;mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;
mso-hansi-theme-font:minor-fareast">实际使用中，直接将<span lang="EN-US">Micro:bit</span>连接<span lang="EN-US">Piano for micro:bit</span>即可，如下图所示<span lang="EN-US">:</span></span></p>
<p>[[File:Micro：bit系列教程23：Piano_for_micro：bit钢琴演奏-0.jpg|400px]]</p>
<h1 style="line-height:150%"><span lang="EN-US" style="font-size:15.0pt;
line-height:150%;font-family:黑体">3.</span><span style="font-size:15.0pt;
line-height:150%;font-family:黑体">软件设计<span lang="EN-US"></span></span></h1>
<p class="MsoNormal" style="line-height:150%"><span lang="EN-US" style="font-size:
12.0pt;line-height:150%;font-family:宋体;mso-ascii-theme-font:minor-fareast;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:
minor-fareast">  </span><span style="font-size:12.0pt;line-height:150%;font-family:宋体;mso-ascii-theme-font:
minor-fareast;mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;
mso-hansi-theme-font:minor-fareast">打开<span lang="EN-US">makecode</span>，添加软件包，输入以下链接：<span lang="EN-US"></span></span></p>
<p class="MsoNormal" style="line-height:150%"><span lang="EN-US"><span style="font-size:12.0pt;
line-height:150%;font-family:宋体;mso-ascii-theme-font:minor-fareast;mso-fareast-font-family:
宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">https://github.com/waveshare/TouchPiano</span></span><span lang="EN-US" style="font-size:12.0pt;line-height:150%;font-family:宋体;mso-ascii-theme-font:
minor-fareast;mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;
mso-hansi-theme-font:minor-fareast"></span></p>
<p class="MsoNormal" style="line-height:150%"><span style="font-size:12.0pt;
line-height:150%;font-family:宋体;mso-ascii-theme-font:minor-fareast;mso-fareast-font-family:
宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast">添加软件包成功后，采用积木块编写以下程序<span lang="EN-US">:</span></span></p>
<p>[[File:Micro：bit系列教程23：Piano_for_micro：bit钢琴演奏-1.png|400px]]</p>
<span lang="EN-US" mso-ansi-language:en-us="" new="" roman="" style="font-size:12.0pt;font-family:宋体;mso-ascii-theme-font:
minor-fareast;mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:minor-fareast;
mso-bidi-font-family:" times="">  </span><span mso-bidi-theme-font:minor-bidi="" new="" roman="" style="font-size:12.0pt;
font-family:宋体;mso-ascii-theme-font:minor-fareast;mso-fareast-theme-font:minor-fareast;
mso-hansi-theme-font:minor-fareast;mso-bidi-font-family:" times="" zh-cn="">下载，触摸电子钢琴上的<span lang="EN-US">CDEFGABC</span>键，即可发出<span lang="EN-US">Do</span>，<span lang="EN-US">Re</span>，<span lang="EN-US">Mi</span>，<span lang="EN-US">Fa</span>，<span lang="EN-US">So</span>，<span lang="EN-US">La</span>，<span lang="EN-US">Xi</span>的音阶。</span>