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dmccreary · Feb 2, 2025 · d5322c4 · d5322c4
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diff --git a/search/search_index.json b/search/search_index.json
diff --git a/setup/05-button-print-test/index.html b/setup/05-button-print-test/index.html
@@ -1115,8 +1115,70 @@ <h1 id="button-print-test">Button Print Test</h1>
 lab to display the button state on the display.</p>
 <h2 id="using-interrupt-request-functions">Using Interrupt Request Functions</h2>
 <p>To print what button is being pressed, we will write three small python functions.
-We then will then have these functions run when the corresponding button is presssed by running the <code>irq</code> function.</p>
+We then will then have these functions run when the corresponding button is pressed by running the <code>irq</code> function.</p>
 <h2 id="sample-code">Sample Code</h2>
+<div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"> 1</span>
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+<span class="normal">31</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="kn">from</span> <span class="nn">utime</span> <span class="kn">import</span> <span class="n">sleep</span>
+<span class="kn">from</span> <span class="nn">machine</span> <span class="kn">import</span> <span class="n">Pin</span>
+
+<span class="c1"># Sample Raspberry Pi Pico MicroPython three button press example</span>
+
+<span class="c1"># Button Pin GPIO Configuration</span>
+<span class="n">BUTTON_1_PIN</span> <span class="o">=</span> <span class="mi">13</span>
+<span class="n">BUTTON_2_PIN</span> <span class="o">=</span> <span class="mi">14</span>
+<span class="n">BUTTON_3_PIN</span> <span class="o">=</span> <span class="mi">15</span>
+
+<span class="c1"># Create 3 button objects as inputs with pullup resistors</span>
+<span class="n">button_1_pin</span> <span class="o">=</span> <span class="n">Pin</span><span class="p">(</span><span class="n">BUTTON_1_PIN</span><span class="p">,</span> <span class="n">Pin</span><span class="o">.</span><span class="n">IN</span><span class="p">,</span> <span class="n">Pin</span><span class="o">.</span><span class="n">PULL_UP</span><span class="p">)</span>
+<span class="n">button_2_pin</span> <span class="o">=</span> <span class="n">Pin</span><span class="p">(</span><span class="n">BUTTON_2_PIN</span><span class="p">,</span> <span class="n">Pin</span><span class="o">.</span><span class="n">IN</span><span class="p">,</span> <span class="n">Pin</span><span class="o">.</span><span class="n">PULL_UP</span><span class="p">)</span>
+<span class="n">button_3_pin</span> <span class="o">=</span> <span class="n">Pin</span><span class="p">(</span><span class="n">BUTTON_3_PIN</span><span class="p">,</span> <span class="n">Pin</span><span class="o">.</span><span class="n">IN</span><span class="p">,</span> <span class="n">Pin</span><span class="o">.</span><span class="n">PULL_UP</span><span class="p">)</span>
+
+<span class="c1"># These functions gets called every time a button is pressed.</span>
+<span class="k">def</span> <span class="nf">button_1_pressed</span><span class="p">(</span><span class="n">pin</span><span class="p">):</span>
+    <span class="nb">print</span><span class="p">(</span><span class="s1">&#39;Button 1 pressed&#39;</span><span class="p">)</span>
+<span class="k">def</span> <span class="nf">button_2_pressed</span><span class="p">(</span><span class="n">pin</span><span class="p">):</span>
+    <span class="nb">print</span><span class="p">(</span><span class="s1">&#39;Button 2 pressed&#39;</span><span class="p">)</span>
+<span class="k">def</span> <span class="nf">button_3_pressed</span><span class="p">(</span><span class="n">pin</span><span class="p">):</span>
+    <span class="nb">print</span><span class="p">(</span><span class="s1">&#39;Button 3 pressed&#39;</span><span class="p">)</span>
+
+<span class="c1"># now we register the button handler functions using the irq setter method for each pin</span>
+<span class="n">button_1_pin</span><span class="o">.</span><span class="n">irq</span><span class="p">(</span><span class="n">trigger</span><span class="o">=</span><span class="n">Pin</span><span class="o">.</span><span class="n">IRQ_FALLING</span><span class="p">,</span> <span class="n">handler</span> <span class="o">=</span> <span class="n">button_1_pressed</span><span class="p">)</span>
+<span class="n">button_2_pin</span><span class="o">.</span><span class="n">irq</span><span class="p">(</span><span class="n">trigger</span><span class="o">=</span><span class="n">Pin</span><span class="o">.</span><span class="n">IRQ_FALLING</span><span class="p">,</span> <span class="n">handler</span> <span class="o">=</span> <span class="n">button_2_pressed</span><span class="p">)</span>
+<span class="n">button_3_pin</span><span class="o">.</span><span class="n">irq</span><span class="p">(</span><span class="n">trigger</span><span class="o">=</span><span class="n">Pin</span><span class="o">.</span><span class="n">IRQ_FALLING</span><span class="p">,</span> <span class="n">handler</span> <span class="o">=</span> <span class="n">button_3_pressed</span><span class="p">)</span>
+
+<span class="c1"># we don&#39;t do anything in the main loop but sleep</span>
+<span class="k">while</span> <span class="kc">True</span><span class="p">:</span>
+    <span class="n">sleep</span><span class="p">(</span><span class="mi">1</span><span class="p">)</span>
+</code></pre></div></td></tr></table></div>