static/netbsd/man4/hpacel.4 4.html


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<table class="head">
  <tr>
    <td class="head-ltitle">HPACEL(4)</td>
    <td class="head-vol">Device Drivers Manual</td>
    <td class="head-rtitle">HPACEL(4)</td>
  </tr>
</table>
<div class="manual-text">
<section class="Sh">
<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
<p class="Pp"><code class="Nm">hpacel</code> &#x2014; <span class="Nd">HP 3D
    DriveGuard accelerometer</span></p>
</section>
<section class="Sh">
<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
<p class="Pp"><code class="Cd">hpacel* at acpi?</code></p>
</section>
<section class="Sh">
<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
<p class="Pp">The <code class="Nm">hpacel</code> device driver supports
    accelerometers that are commonly available in Hewlett-Packard laptops. The
    supported chip is <code class="Dv">LIS3LV02DL</code> from
    STMicroelectronics, although other chips from the same family, such as
    <code class="Dv">LIS3LV02DQ</code>, may also work, provided that the vendor
    has implemented suitable <code class="Dv">ACPI</code> access methods.</p>
<p class="Pp">The <code class="Nm">hpacel</code> driver reports the acceleration
    readings of the X-, Y-, and Z-axis via the <a class="Xr">envsys(4)</a> API
    and the <a class="Xr">envstat(8)</a> command.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
  ALSO</a></h1>
<p class="Pp"><a class="Xr">acpi(4)</a>, <a class="Xr">aps(4)</a>,
    <a class="Xr">hpqlb(4)</a>, <a class="Xr">wmihp(4)</a></p>
<p class="Pp"><cite class="Rs"><span class="RsA">STMicroelectronics</span>,
    <span class="RsT">LIS3LV02DL: 3-Axis - &#x00B1;2g/&#x00B1;6g digital output
    low voltage linear accelerometer. AN2381 Application Note</span>,
    <span class="RsN">Revision 1</span>,
    <a class="RsU" href="http://www.st.com/stonline/products/literature/anp/12441.pdf">http://www.st.com/stonline/products/literature/anp/12441.pdf</a>,
    <span class="RsD">June, 2006</span>.</cite></p>
</section>
<section class="Sh">
<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
<p class="Pp">The <code class="Nm">hpacel</code> device driver appeared in
    <span class="Ux">NetBSD 6.0</span>.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
<p class="Pp"><span class="An">Jukka Ruohonen</span>
    &#x27E8;jruohonen@iki.fi&#x27E9;</p>
</section>
<section class="Sh">
<h1 class="Sh" id="BUGS"><a class="permalink" href="#BUGS">BUGS</a></h1>
<p class="Pp">The used accelerometer chip is capable of generating wake-up,
    direction detection, and free-fall interrupts. In the ideal situation these
    could be used to evoke possible emergency action. However, the
    <code class="Nm">hpacel</code> driver only reports the readings from the
    accelerometer via <a class="Xr">sysmon_envsys(9)</a>.</p>
</section>
</div>
<table class="foot">
  <tr>
    <td class="foot-date">September 7, 2011</td>
    <td class="foot-os">NetBSD 10.1</td>
  </tr>
</table>