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| 1 <!DOCTYPE html><!-- This page is a placeholder for generated extensions api doc.
Note: | 1 <!DOCTYPE html><!-- This page is a placeholder for generated extensions api doc.
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| 2 1) The <head> information in this page is significant, should be uniform | 2 1) The <head> information in this page is significant, should be uniform |
| 3 across api docs and should be edited only with knowledge of the | 3 across api docs and should be edited only with knowledge of the |
| 4 templating mechanism. | 4 templating mechanism. |
| 5 3) All <body>.innerHTML is genereated as an rendering step. If viewed in a | 5 3) All <body>.innerHTML is genereated as an rendering step. If viewed in a |
| 6 browser, it will be re-generated from the template, json schema and | 6 browser, it will be re-generated from the template, json schema and |
| 7 authored overview content. | 7 authored overview content. |
| 8 4) The <body>.innerHTML is also generated by an offline step so that this | 8 4) The <body>.innerHTML is also generated by an offline step so that this |
| 9 page may easily be indexed by search engines. | 9 page may easily be indexed by search engines. |
| 10 --><html xmlns="http://www.w3.org/1999/xhtml"><head> | 10 --><html xmlns="http://www.w3.org/1999/xhtml"><head> |
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| 234 <h2 id="usb">Accessing USB devices</h2> | 234 <h2 id="usb">Accessing USB devices</h2> |
| 235 <p> | 235 <p> |
| 236 You can use the USB API to send messages to any connected device. | 236 You can use the USB API to send messages to any connected device. |
| 237 </p> | 237 </p> |
| 238 <a name="H3-1"></a><h3>Manifest requirement</h3> | 238 <a name="H3-1"></a><h3>Manifest requirement</h3> |
| 239 <p> | 239 <p> |
| 240 You must add the "usb" permission | 240 You must add the "usb" permission |
| 241 to the manifest file: | 241 to the manifest file: |
| 242 </p> | 242 </p> |
| 243 <pre>"permissions": [ | 243 <pre>"permissions": [ |
| 244 "appWindow", | 244 "app.window", |
| 245 "experimental", | 245 "experimental", |
| 246 "usb" | 246 "usb" |
| 247 ] | 247 ] |
| 248 </pre> | 248 </pre> |
| 249 <a name="H3-2"></a><h3>Finding a device</h3> | 249 <a name="H3-2"></a><h3>Finding a device</h3> |
| 250 <p> | 250 <p> |
| 251 Every device in a USB bus is identified | 251 Every device in a USB bus is identified |
| 252 by its vendor and product IDs. | 252 by its vendor and product IDs. |
| 253 To find a device, | 253 To find a device, |
| 254 use the <code>findDevice()</code> method | 254 use the <code>findDevice()</code> method |
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| 807 _uff=0; | 807 _uff=0; |
| 808 urchinTracker(); | 808 urchinTracker(); |
| 809 } | 809 } |
| 810 catch(e) {/* urchinTracker not available. */} | 810 catch(e) {/* urchinTracker not available. */} |
| 811 </script> | 811 </script> |
| 812 <!-- end analytics --> | 812 <!-- end analytics --> |
| 813 </div> | 813 </div> |
| 814 </div> <!-- /gc-footer --> | 814 </div> <!-- /gc-footer --> |
| 815 </div> <!-- /gc-container --> | 815 </div> <!-- /gc-container --> |
| 816 </body></html> | 816 </body></html> |
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