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<title>ArduinoLibs: Dot Matrix Display Demo</title>
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<div class="title">Dot Matrix Display Demo </div> </div>
</div><!--header-->
<div class="contents">
<div class="textblock"><p>This demo shows off various features of drawing with the <a class="el" href="classBitmap.html" title="Represents a monochrome bitmap within main memory. ">Bitmap</a> class to a <a class="el" href="classDMD.html" title="Handle large dot matrix displays composed of LED&#39;s. ">DMD</a> display:</p>
<ul>
<li>Drawing circles, lines, and rectangles. </li>
<li>Filling the screen with a bitmap-based brick pattern. </li>
<li>Drawing bitmaps directly from program memory. </li>
<li>Drawing text in various fonts. </li>
<li>Scrolling text in a "marquee".</li>
</ul>
<p><a class="el" href="dmd_running_figure.html">RunningFigure</a> provides another example of drawing and animating bitmaps.</p>
<p>The full source code for the demo follows:</p>
<div class="fragment"><div class="line"><span class="comment">/*</span></div>
<div class="line"><span class="comment">This example demonstrates how to use the DMD and related classes to</span></div>
<div class="line"><span class="comment">draw things on a Freetronics Large Dot Matrix Display.</span></div>
<div class="line"><span class="comment"></span></div>
<div class="line"><span class="comment">This example is placed into the public domain.</span></div>
<div class="line"><span class="comment">*/</span></div>
<div class="line"></div>
<div class="line"><span class="preprocessor">#include &lt;DMD.h&gt;</span></div>
<div class="line"><span class="preprocessor">#include &lt;DejaVuSans9.h&gt;</span></div>
<div class="line"><span class="preprocessor">#include &lt;DejaVuSansBold9.h&gt;</span></div>
<div class="line"><span class="preprocessor">#include &lt;DejaVuSansItalic9.h&gt;</span></div>
<div class="line"><span class="preprocessor">#include &lt;Mono5x7.h&gt;</span></div>
<div class="line"></div>
<div class="line"><a class="code" href="classDMD.html">DMD</a> display;</div>
<div class="line"></div>
<div class="line">ISR(TIMER1_OVF_vect)</div>
<div class="line">{</div>
<div class="line"> display.<a class="code" href="classDMD.html#a9e4bf2a9d247312d35c1401ff61261c8">refresh</a>();</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keywordtype">void</span> setup() {</div>
<div class="line"> display.<a class="code" href="classDMD.html#a4c3b04b384f3d656a9b59690836775e2">enableTimer1</a>();</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keywordtype">void</span> loop() {</div>
<div class="line"> drawShapes();</div>
<div class="line"> delay(1000);</div>
<div class="line"></div>
<div class="line"> drawBricks();</div>
<div class="line"> delay(1000);</div>
<div class="line"></div>
<div class="line"> drawStickFigures();</div>
<div class="line"> delay(1000);</div>
<div class="line"></div>
<div class="line"> drawText();</div>
<div class="line"> delay(1000);</div>
<div class="line"></div>
<div class="line"> drawBoldText();</div>
<div class="line"> delay(1000);</div>
<div class="line"></div>
<div class="line"> drawItalicText();</div>
<div class="line"> delay(1000);</div>
<div class="line"></div>
<div class="line"> drawMonoText();</div>
<div class="line"> delay(1000);</div>
<div class="line"></div>
<div class="line"> drawMarquee();</div>
<div class="line"> delay(500);</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keywordtype">void</span> drawShapes()</div>
<div class="line">{</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a839dc8fab05a5ebf7a6b2e61436b2fa1">clear</a>();</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a933763a4f3cba79fbcf97ae6d0a864aa">drawCircle</a>(6, 8, 3);</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a757291b9a39bcb0d64ac98d3a2fa061b">drawFilledCircle</a>(16, 8, 3);</div>
<div class="line"> display.<a class="code" href="classBitmap.html#aa0a84f3694e343d68e7021552c69f767">drawLine</a>(22, 5, 28, 11);</div>
<div class="line"> display.<a class="code" href="classBitmap.html#aa0a84f3694e343d68e7021552c69f767">drawLine</a>(28, 5, 22, 11);</div>
<div class="line"> display.<a class="code" href="classBitmap.html#aac61e3f7f625db568e37d88b52b3b2fc">drawRect</a>(0, 0, display.<a class="code" href="classBitmap.html#a76c3b49e535761f07c553e7336daf523">width</a>() - 1, display.<a class="code" href="classBitmap.html#adcd4e3dc7594421e647b0f52da9a41a3">height</a>() - 1);</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keywordtype">void</span> drawBricks()</div>
<div class="line">{</div>
<div class="line"> <span class="keyword">static</span> <span class="keyword">const</span> uint8_t bricks[] PROGMEM = {</div>
<div class="line"> 16, 6,</div>
<div class="line"> B11111111, B11111111,</div>
<div class="line"> B10000000, B10000000,</div>
<div class="line"> B10000000, B10000000,</div>
<div class="line"> B11111111, B11111111,</div>
<div class="line"> B00001000, B00001000,</div>
<div class="line"> B00001000, B00001000</div>
<div class="line"> };</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a99da820f9280aace6b512801d5a5e2b2">fill</a>(0, 0, display.<a class="code" href="classBitmap.html#a76c3b49e535761f07c553e7336daf523">width</a>(), display.<a class="code" href="classBitmap.html#adcd4e3dc7594421e647b0f52da9a41a3">height</a>(), bricks);</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keywordtype">void</span> drawStickFigures()</div>
<div class="line">{</div>
<div class="line"> <span class="keyword">static</span> <span class="keyword">const</span> uint8_t stickFigure[] PROGMEM = {</div>
<div class="line"> 9, 13,</div>
<div class="line"> B00111110, B00000000,</div>
<div class="line"> B01000001, B00000000,</div>
<div class="line"> B01000001, B00000000,</div>
<div class="line"> B00111110, B00000000,</div>
<div class="line"> B00001000, B00000000,</div>
<div class="line"> B00001000, B00000000,</div>
<div class="line"> B11111111, B10000000,</div>
<div class="line"> B00001000, B00000000,</div>
<div class="line"> B00001000, B00000000,</div>
<div class="line"> B00010100, B00000000,</div>
<div class="line"> B00100010, B00000000,</div>
<div class="line"> B01000001, B00000000,</div>
<div class="line"> B10000000, B10000000</div>
<div class="line"> };</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a839dc8fab05a5ebf7a6b2e61436b2fa1">clear</a>();</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a491e9c0bb20ddf5a5eb4933077c8ed72">drawBitmap</a>(2, 1, stickFigure);</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a4321640464bc08b60348c09bff01b86a">drawInvertedBitmap</a>(12, 1, stickFigure);</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a491e9c0bb20ddf5a5eb4933077c8ed72">drawBitmap</a>(22, 1, stickFigure);</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keywordtype">void</span> drawText()</div>
<div class="line">{</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a839dc8fab05a5ebf7a6b2e61436b2fa1">clear</a>();</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a64d7a9651d5c385a044cc910a3b82837">setFont</a>(DejaVuSans9);</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a3e9bcbfb584d5020bd6f0a313ee275f0">drawText</a>(0, 0, <span class="stringliteral">&quot;Hello&quot;</span>);</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a3e9bcbfb584d5020bd6f0a313ee275f0">drawText</a>(9, 8, <span class="stringliteral">&quot;World&quot;</span>);</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keywordtype">void</span> drawBoldText()</div>
<div class="line">{</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a839dc8fab05a5ebf7a6b2e61436b2fa1">clear</a>();</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a64d7a9651d5c385a044cc910a3b82837">setFont</a>(DejaVuSansBold9);</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a3e9bcbfb584d5020bd6f0a313ee275f0">drawText</a>(0, 0, <span class="stringliteral">&quot;Hello&quot;</span>);</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a3e9bcbfb584d5020bd6f0a313ee275f0">drawText</a>(4, 8, <span class="stringliteral">&quot;World&quot;</span>);</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keywordtype">void</span> drawItalicText()</div>
<div class="line">{</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a839dc8fab05a5ebf7a6b2e61436b2fa1">clear</a>();</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a64d7a9651d5c385a044cc910a3b82837">setFont</a>(DejaVuSansItalic9);</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a3e9bcbfb584d5020bd6f0a313ee275f0">drawText</a>(0, 0, <span class="stringliteral">&quot;Hello&quot;</span>);</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a3e9bcbfb584d5020bd6f0a313ee275f0">drawText</a>(2, 8, <span class="stringliteral">&quot;World&quot;</span>);</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keywordtype">void</span> drawMonoText()</div>
<div class="line">{</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a839dc8fab05a5ebf7a6b2e61436b2fa1">clear</a>();</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a64d7a9651d5c385a044cc910a3b82837">setFont</a>(Mono5x7);</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a3e9bcbfb584d5020bd6f0a313ee275f0">drawText</a>(0, 0, <span class="stringliteral">&quot;Hello&quot;</span>);</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a3e9bcbfb584d5020bd6f0a313ee275f0">drawText</a>(3, 8, <span class="stringliteral">&quot;World&quot;</span>);</div>
<div class="line">}</div>
<div class="line"></div>
<div class="line"><span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span> message[] = <span class="stringliteral">&quot;Eat at Joes!&quot;</span>;</div>
<div class="line"></div>
<div class="line"><span class="keywordtype">void</span> drawMarquee()</div>
<div class="line">{</div>
<div class="line"> <span class="keywordtype">int</span> width = display.<a class="code" href="classBitmap.html#a76c3b49e535761f07c553e7336daf523">width</a>();</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a64d7a9651d5c385a044cc910a3b82837">setFont</a>(DejaVuSans9);</div>
<div class="line"> <span class="keywordtype">int</span> msgWidth = display.<a class="code" href="classBitmap.html#a0f7607b1c7867987f4500d490a666e8a">textWidth</a>(message);</div>
<div class="line"> <span class="keywordtype">int</span> fullScroll = msgWidth + width + 1;</div>
<div class="line"> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> x = 0; x &lt; fullScroll; ++x) {</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a839dc8fab05a5ebf7a6b2e61436b2fa1">clear</a>();</div>
<div class="line"> display.<a class="code" href="classBitmap.html#a3e9bcbfb584d5020bd6f0a313ee275f0">drawText</a>(width - x, 3, message);</div>
<div class="line"> delay(50);</div>
<div class="line"> }</div>
<div class="line">}</div>
</div><!-- fragment --> </div></div><!-- contents -->
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