db/2127.xml

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   2 <?xml-stylesheet type="text/xsl" href="helma.xsl"?>
   3 <xmlroot xmlns:hop="http://www.helma.org/docs/guide/features/database">
   4   <hopobject id="2127" name="Bonelib" prototype="Page" created="1349110534079" lastModified="1395757083283">
   5   <hop:parent idref="20" prototyperef="Page"/>
   6     <is_xhtml type="boolean">true</is_xhtml>
   7     <http_remotehost>127.0.0.1</http_remotehost>
   8     <pname>C++ and PERL Hardware Abstraction Library</pname>
   9     <registrant>janick-bergeron.myopenid.com</registrant>
  10     <http_language>en-US,en;q=0.8</http_language>
  11     <uri>Bonelib</uri>
  12     <http_browser>Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.79 Safari/537.4</http_browser>
  13     <time type="date">03.10.2012 10:01:43 CDT</time>
  14     <updatetime type="date">01.10.2012 11:55:34 CDT</updatetime>
  15     <hopsession>127.0.0.198.182.56.a8rz94jxxaah</hopsession>
  16     <body>For example, to use pin P8[3] as an input with a pull-down, you normally have to:
  17 &lt;p&gt;
  18 &lt;ul&gt;
  19 &lt;li&gt;Look up the BeagleBone System Reference Manual and determine that pin 3 on connector P8 corresponds to GPIO1[6]
  20 &lt;li&gt;Set the pin muxing to mode 7 + input + pull-down by writing 007 to /sys/kernel/debug/omap_mux/gpmac_ad6
  21 &lt;li&gt;Export the GPIO system files by writing 38 to /sys/class/gpio (btw, &quot;38&quot; does not come from P8[3], but from 1*32+6).
  22 &lt;li&gt;Set the GPIO to input by writing &quot;in&quot; to /sys/class/gpio/gpio38/direction
  23 &lt;li&gt;Sample the input by reading /sys/class/gpio/gpio38/value
  24 &lt;/ul&gt;
  25 &lt;p&gt;
  26 Still with me? Bonelib makes it as simple as:
  27 &lt;p&gt;
  28 &lt;pre&gt;BeagleBone::gpio* inp = BeagleBone::gpio::P8(3);
  29 inp-&gt;configure(BeagleBone::pin::IN, BeagleBone::pin::PD);
  30
  31 unsigned char val = inp-&gt;get();&lt;/pre&gt;
  32 &lt;p&gt;
  33 voila!
  34 &lt;p&gt;
  35 Find the full user documentation at http://sourceforge.net/p/bonelib/wiki/Home/</body>
  36     <pseudoparent idref="20" prototyperef="Page"/>
  37     <rssfeed></rssfeed>
  38     <pvcount type="float">9.0</pvcount>
  39     <homepage>https://sourceforge.net/projects/bonelib/</homepage>
  40     <render_skin>project</render_skin>
  41     <edit_skin>edit_project</edit_skin>
  42     <http_referer>http://beagleboard.org/project/Bonelib/edit</http_referer>
  43     <http_host>beagleboard.org</http_host>
  44     <errmsg></errmsg>
  45     <shortdesc>Library of C++/PERL objects providing a high-level abstraction of the BeagleBone peripherals</shortdesc>
  46     <user>janick-bergeron.myopenid.com</user>
  47   </hopobject>
  48 </xmlroot>