Blinking onboard LED

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default

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      <h2>Build and execute instructions</h2>
      <img align="right" src="/static/images/black-usr3-led.PNG">
      <ul>
          <li>Run the example code and observe USR3 blinking.</li>
          <li>Alter the frequency and re-run the example.</li>
      </ul>
    

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var b = require('bonescript');
var led = "USR3";
var state = 0;

b.pinMode(led, 'out');
toggleLED = function() {
 state = state ? 0 : 1;
 b.digitalWrite(led, state);
};

timer = setInterval(toggleLED, 100);

stopTimer = function() {
 clearInterval(timer);
};

setTimeout(stopTimer, 3000);

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      <h2>See also</h2>
      <h3>Topics</h3>
      <ul>
       <li><a href="/Support/BoneScript/#headers">BeagleBone expansion headers</a></li>
       <li><a href="/Support/BoneScript/#digitalio">Digital I/O</a></li>
       <li><a href="/Support/BoneScript/#timers">Timers</a></li>
      </ul>
      <h3>Related functions</h3>
      <ul>
       <li><a href="/Support/BoneScript/#require">require</a></li>
       <li><a href="/Support/BoneScript/pinMode">pinMode</a></li>
       <li><a href="/Support/BoneScript/digitalWrite">digitalWrite</a></li>
      </ul>
      <h3>Examples</h3>
      <ul>
       <li><a href="/Support/BoneScript/demo_blinkled_external">Blink an external LED</a></li>
      </ul>
    

bonecard.json

{"title":"Blink an LED","description":"Blinking onboard LED","bonecards":[{"title":"Build And Execute","type":"html"},{"title":"Demo","type":"code"},{"title":"See Also","type":"html"}]}