独创Arduino电子琴
许安邦
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</head>
<body lang=ZH-CN link=blue vlink=purple style='tab-interval:21.0pt;text-justify-trim:
punctuation'>
<div class=WordSection1 style='layout-grid:15.6pt'>
<h2 style='margin-left:20.25pt;text-indent:-20.25pt;mso-list:l1 level1 lfo1'><![if !supportLists]><span
lang=EN-US style='mso-bidi-font-family:宋体;mso-bidi-theme-font:major-fareast'><span
style='mso-list:Ignore'>一.</span></span><![endif]><span style='font-family:
宋体;mso-ascii-font-family:Cambria;mso-ascii-theme-font:major-latin;mso-fareast-font-family:
宋体;mso-fareast-theme-font:major-fareast;mso-hansi-font-family:Cambria;
mso-hansi-theme-font:major-latin'>目标：</span></h2>
<p class=MsoNormal style='margin-left:20.25pt'><span style='font-family:宋体;
mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:
宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:Calibri;
mso-hansi-theme-font:minor-latin'>实现一个简单电子琴的功能</span></p>
<h2><span style='font-family:宋体;mso-ascii-font-family:Cambria;mso-ascii-theme-font:
major-latin;mso-fareast-font-family:宋体;mso-fareast-theme-font:major-fareast;
mso-hansi-font-family:Cambria;mso-hansi-theme-font:major-latin'>二</span><span
lang=EN-US>.</span><span style='font-family:宋体;mso-ascii-font-family:Cambria;
mso-ascii-theme-font:major-latin;mso-fareast-font-family:宋体;mso-fareast-theme-font:
major-fareast;mso-hansi-font-family:Cambria;mso-hansi-theme-font:major-latin'>原理：</span></h2>
<p class=MsoNormal><span lang=EN-US><span style='mso-spacerun:yes'>
</span><span style='mso-tab-count:1'> </span></span><span
style='font-family:宋体;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:
Calibri;mso-hansi-theme-font:minor-latin'>用按键作为钢琴的键盘，结合蜂鸣器实验，用蜂鸣器的一个</span><span
class=SpellE><span lang=EN-US>pwm</span></span><span style='font-family:宋体;
mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:
宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:Calibri;
mso-hansi-theme-font:minor-latin'>引脚作为输出。</span></p>
<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'> </span></span><span
style='font-family:宋体;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:
Calibri;mso-hansi-theme-font:minor-latin'>不同的按键</span> <span style='font-family:
宋体;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:
宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:Calibri;
mso-hansi-theme-font:minor-latin'>被按下</span> <span style='font-family:宋体;
mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:
宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:Calibri;
mso-hansi-theme-font:minor-latin'>代表不同的</span><span class=SpellE><span
lang=EN-US>pwm</span></span><span style='font-family:宋体;mso-ascii-font-family:
Calibri;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:宋体;mso-fareast-theme-font:
minor-fareast;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin'>输出频率。</span></p>
<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'> </span></span><span
style='font-family:宋体;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:
Calibri;mso-hansi-theme-font:minor-latin'>不同的频率输出就能使蜂鸣器或者喇叭输出</span><span
lang=EN-US>midi</span><span style='font-family:宋体;mso-ascii-font-family:Calibri;
mso-ascii-theme-font:minor-latin;mso-fareast-font-family:宋体;mso-fareast-theme-font:
minor-fareast;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin'>的音乐。</span></p>
<h2><span style='font-family:宋体;mso-ascii-font-family:Cambria;mso-ascii-theme-font:
major-latin;mso-fareast-font-family:宋体;mso-fareast-theme-font:major-fareast;
mso-hansi-font-family:Cambria;mso-hansi-theme-font:major-latin'>三</span><span
lang=EN-US>.</span><span style='font-family:宋体;mso-ascii-font-family:Cambria;
mso-ascii-theme-font:major-latin;mso-fareast-font-family:宋体;mso-fareast-theme-font:
major-fareast;mso-hansi-font-family:Cambria;mso-hansi-theme-font:major-latin'>方框图：</span></h2>
<p class=MsoNormal><span lang=EN-US><!--[if gte vml 1]><v:shapetype id="_x0000_t75"
coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe"
filled="f" stroked="f">
<v:stroke joinstyle="miter"/>
<v:formulas>
<v:f eqn="if lineDrawn pixelLineWidth 0"/>
<v:f eqn="sum @0 1 0"/>
<v:f eqn="sum 0 0 @1"/>
<v:f eqn="prod @2 1 2"/>
<v:f eqn="prod @3 21600 pixelWidth"/>
<v:f eqn="prod @3 21600 pixelHeight"/>
<v:f eqn="sum @0 0 1"/>
<v:f eqn="prod @6 1 2"/>
<v:f eqn="prod @7 21600 pixelWidth"/>
<v:f eqn="sum @8 21600 0"/>
<v:f eqn="prod @7 21600 pixelHeight"/>
<v:f eqn="sum @10 21600 0"/>
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</v:shapetype><v:shape id="_x0000_i1025" type="#_x0000_t75" style='width:266.25pt;
height:161.25pt' o:ole="">
<v:imagedata src="电子琴.files/image001.emz" o:title=""/>
</v:shape><![endif]--><![if !vml]><img width=355 height=215
src="电子琴.files/image002.gif" v:shapes="_x0000_i1025"><![endif]><!--[if gte mso 9]><xml>
<o:OLEObject Type="Embed" ProgID="Visio.Drawing.11" ShapeID="_x0000_i1025"
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<h2><span style='font-family:宋体;mso-ascii-font-family:Cambria;mso-ascii-theme-font:
major-latin;mso-fareast-font-family:宋体;mso-fareast-theme-font:major-fareast;
mso-hansi-font-family:Cambria;mso-hansi-theme-font:major-latin'>四</span><span
lang=EN-US>.</span><span style='font-family:宋体;mso-ascii-font-family:Cambria;
mso-ascii-theme-font:major-latin;mso-fareast-font-family:宋体;mso-fareast-theme-font:
major-fareast;mso-hansi-font-family:Cambria;mso-hansi-theme-font:major-latin'>代码</span></h2>
<p class=MsoNormal><span lang=EN-US>//</span><span style='font-family:宋体;
mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:
宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:Calibri;
mso-hansi-theme-font:minor-latin'>定义频率，每一种频率代表一个音调</span></p>
<p class=MsoNormal><span lang=EN-US>//1234567</span><span style='font-family:
宋体;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:
宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:Calibri;
mso-hansi-theme-font:minor-latin'>分别代表</span><span lang=EN-US>1234567</span><span
style='font-family:宋体;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:
Calibri;mso-hansi-theme-font:minor-latin'>的音调</span></p>
<p class=MsoNormal><span lang=EN-US>#define <span class=GramE>A<span
style='mso-spacerun:yes'> </span>262</span></span></p>
<p class=MsoNormal><span lang=EN-US>#define <span class=GramE>S<span
style='mso-spacerun:yes'> </span>294</span></span></p>
<p class=MsoNormal><span lang=EN-US>#define <span class=GramE>D<span
style='mso-spacerun:yes'> </span>330</span></span></p>
<p class=MsoNormal><span lang=EN-US>#define <span class=GramE>F1 <span
style='mso-spacerun:yes'> </span>349</span></span></p>
<p class=MsoNormal><span lang=EN-US>#define <span class=GramE>G<span
style='mso-spacerun:yes'> </span>392</span></span></p>
<p class=MsoNormal><span lang=EN-US>#define <span class=GramE>H<span
style='mso-spacerun:yes'> </span>440</span></span></p>
<p class=MsoNormal><span lang=EN-US>#define <span class=GramE>J<span
style='mso-spacerun:yes'> </span>494</span></span></p>
<p class=MsoNormal><span lang=EN-US>#define <span class=GramE>K<span
style='mso-spacerun:yes'> </span>523</span></span></p>
<p class=MsoNormal><span lang=EN-US>#define <span class=GramE>L<span
style='mso-spacerun:yes'> </span>587</span></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span class=SpellE><span lang=EN-US>int</span></span><span
lang=EN-US> <span class=SpellE>pwmPin</span>=9;<span style='mso-tab-count:6'> </span>//<span
class=SpellE>pwm</span></span><span style='font-family:宋体;mso-ascii-font-family:
Calibri;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:宋体;mso-fareast-theme-font:
minor-fareast;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin'>的引脚为</span><span
lang=EN-US>9</span></p>
<p class=MsoNormal><span class=SpellE><span lang=EN-US>int</span></span><span
lang=EN-US> button;<span style='mso-tab-count:5'> </span>//</span><span
style='font-family:宋体;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:
Calibri;mso-hansi-theme-font:minor-latin'>到</span><span class=SpellE><span
lang=EN-US>arduino</span></span><span style='font-family:宋体;mso-ascii-font-family:
Calibri;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:宋体;mso-fareast-theme-font:
minor-fareast;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin'>板子的数据</span></p>
<p class=MsoNormal><span class=GramE><span lang=EN-US>void</span></span><span
lang=EN-US> setup(){</span></p>
<p class=MsoNormal><span lang=EN-US><span style='mso-spacerun:yes'>
</span><span class=SpellE>pinMode</span>(<span class=SpellE>pwmPin,OUTPUT</span>);<span
style='mso-tab-count:3'> </span>//<span
class=SpellE>pwmPin</span></span><span style='font-family:宋体;mso-ascii-font-family:
Calibri;mso-ascii-theme-font:minor-latin;mso-fareast-font-family:宋体;mso-fareast-theme-font:
minor-fareast;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin'>引脚输出控制蜂鸣器发声</span></p>
<p class=MsoNormal><span lang=EN-US><span style='mso-spacerun:yes'>
</span><span class=SpellE><span class=GramE>Serial.begin</span></span><span
class=GramE>(</span>9600);</span></p>
<p class=MsoNormal><span lang=EN-US>}</span></p>
<p class=MsoNormal><span class=GramE><span lang=EN-US>void</span></span><span
lang=EN-US> loop(){</span></p>
<p class=MsoNormal><span class=SpellE><span class=GramE><span lang=EN-US>int</span></span></span><span
lang=EN-US> <span class=SpellE>i</span>;</span></p>
<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'> </span><span
class=GramE>for(</span> <span class=SpellE>i</span>=1; <span class=SpellE>i</span><=9;
<span class=SpellE>i</span>++)</span></p>
<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'> </span>{</span></p>
<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:2'> </span><span
class=GramE>button=</span>0;</span></p>
<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:2'> </span><span
class=GramE>button=</span><span class=SpellE>digitalRead</span>(<span
class=SpellE>i</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span style='mso-tab-count:1'> </span>}</span></p>
<p class=MsoNormal><span lang=EN-US><span style='mso-spacerun:yes'>
</span><span class=SpellE><span class=GramE>int</span></span> x=button* <span
class=SpellE>i</span>;</span></p>
<p class=MsoNormal><span lang=EN-US><span style='mso-spacerun:yes'>
</span>switch(x)<span style='mso-tab-count:5'> </span>//</span><span
style='font-family:宋体;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:
Calibri;mso-hansi-theme-font:minor-latin'>在上面的循环中我讲</span><span lang=EN-US>button=0</span><span
style='font-family:宋体;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:
Calibri;mso-hansi-theme-font:minor-latin'>；然后读取</span><span class=SpellE><span
lang=EN-US>digitalRead</span></span><span lang=EN-US>(<span class=SpellE>i</span>)</span><span
style='font-family:宋体;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:
Calibri;mso-hansi-theme-font:minor-latin'>给</span><span lang=EN-US>button</span><span
style='font-family:宋体;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:
Calibri;mso-hansi-theme-font:minor-latin'>，</span></p>
<p class=MsoNormal><span lang=EN-US><span style='mso-spacerun:yes'>
</span>{<span style='mso-tab-count:9'> </span>//</span><span
style='font-family:宋体;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:
Calibri;mso-hansi-theme-font:minor-latin'>也就是说如果</span><span lang=EN-US>button</span><span
style='font-family:宋体;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:
Calibri;mso-hansi-theme-font:minor-latin'>为</span><span lang=EN-US>1</span><span
style='font-family:宋体;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:
Calibri;mso-hansi-theme-font:minor-latin'>时，</span><span lang=EN-US>button*1==<span
class=SpellE>i</span>;</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span class=GramE>case</span>
1:</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span>tone(<span
class=SpellE>pwmPin,A</span>);<span style='mso-tab-count:4'> </span>//</span><span
style='font-family:宋体;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:
Calibri;mso-hansi-theme-font:minor-latin'>频率不一样，发出的音调也不一样</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span>delay(250);<span
style='mso-tab-count:5'> </span>//</span><span
style='font-family:宋体;mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-font-family:
Calibri;mso-hansi-theme-font:minor-latin'>这个频率持续的时间，音调持续时间</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=SpellE><span class=GramE>noTone</span></span><span class=GramE>(</span><span
class=SpellE>pwmPin</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>break</span>;</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span class=GramE>case</span>
2:</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>tone(</span><span class=SpellE>pwmPin,S</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>delay(</span>250);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=SpellE><span class=GramE>noTone</span></span><span class=GramE>(</span><span
class=SpellE>pwmPin</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>break</span>;</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span class=GramE>case</span>
3:</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>tone(</span><span class=SpellE>pwmPin,D</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>delay(</span>250);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=SpellE><span class=GramE>noTone</span></span><span class=GramE>(</span><span
class=SpellE>pwmPin</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>break</span>;</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span class=GramE>case</span>
4:</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>tone(</span>pwmPin,F1);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>delay(</span>250);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=SpellE><span class=GramE>noTone</span></span><span class=GramE>(</span><span
class=SpellE>pwmPin</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>break</span>;</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span class=GramE>case</span>
5:</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>tone(</span><span class=SpellE>pwmPin,G</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>delay(</span>250);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=SpellE><span class=GramE>noTone</span></span><span class=GramE>(</span><span
class=SpellE>pwmPin</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>break</span>;</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span class=GramE>case</span>
6:</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>tone(</span><span class=SpellE>pwmPin,H</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>delay(</span>250);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=SpellE><span class=GramE>noTone</span></span><span class=GramE>(</span><span
class=SpellE>pwmPin</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>break</span>;</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span class=GramE>case</span>
7:</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>tone(</span><span class=SpellE>pwmPin,J</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>delay(</span>250);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=SpellE><span class=GramE>noTone</span></span><span class=GramE>(</span><span
class=SpellE>pwmPin</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>break</span>;</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span class=GramE>case</span>
8:</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>tone(</span><span class=SpellE>pwmPin,K</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>delay(</span>250);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=SpellE><span class=GramE>noTone</span></span><span class=GramE>(</span><span
class=SpellE>pwmPin</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>break</span>;</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span class=GramE>case</span>
9:</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>tone(</span><span class=SpellE>pwmPin,L</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>delay(</span>250);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=SpellE><span class=GramE>noTone</span></span><span class=GramE>(</span><span
class=SpellE>pwmPin</span>);</span></p>
<p class=MsoNormal><span lang=EN-US><span
style='mso-spacerun:yes'> </span><span
class=GramE>break</span>;</span></p>
<p class=MsoNormal><span lang=EN-US><span style='mso-spacerun:yes'>
</span>}</span></p>
<h2><span lang=EN-US style='font-size:10.5pt;mso-bidi-font-size:11.0pt;
line-height:173%;font-family:"Calibri","sans-serif";mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:宋体;mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:
minor-latin;mso-bidi-font-family:"Times New Roman";mso-bidi-theme-font:minor-bidi;
font-weight:normal'>}</span><span style='font-family:宋体;mso-ascii-font-family:
Cambria;mso-ascii-theme-font:major-latin;mso-fareast-font-family:宋体;mso-fareast-theme-font:
major-fareast;mso-hansi-font-family:Cambria;mso-hansi-theme-font:major-latin'>五</span><span
lang=EN-US>.</span><span style='font-family:宋体;mso-ascii-font-family:Cambria;
mso-ascii-theme-font:major-latin;mso-fareast-font-family:宋体;mso-fareast-theme-font:
major-fareast;mso-hansi-font-family:Cambria;mso-hansi-theme-font:major-latin'>备注</span></h2>
<p class=MsoNormal><span lang=EN-US><a
href="http://www.dfrobot.com/wiki/index.php/I2C/TWI_LCD1602_Module_(SKU:_DFR0063)"><span
style='mso-bidi-font-size:10.5pt;font-family:"微软雅黑","sans-serif"'>http://www.dfrobot.com/wiki/index.php/I2C/TWI_LCD1602_Module_(SKU:_DFR0063)</span></a></span></p>
<p class=MsoNormal><span lang=EN-US><a
href="https://bitbucket.org/fmalpartida/new-liquidcrystal/wiki/Home">https://bitbucket.org/fmalpartida/new-liquidcrystal/wiki/Home</a></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
</div>
</body>
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