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<h1 id="hardware-information-and-status">Hardware Information and Status<a class="headerlink" href="#hardware-information-and-status" title="Permanent link"></a></h1>
<p>The hardware infomation and status is handled by the YANG model <a href="https://www.rfc-editor.org/rfc/rfc8348.html">IETF
hardware</a>, with deviations and augmentations in <em>infix-hardware</em>.</p>
<h2 id="gpsgnss-receivers">GPS/GNSS Receivers<a class="headerlink" href="#gpsgnss-receivers" title="Permanent link"></a></h2>
<p>Infix supports GPS/GNSS receivers for hardware status monitoring and NTP
time synchronization. USB GPS receivers using the USB ACM interface are
supported (e.g., u-blox). When connected, devices are automatically
discovered and named <code>gps0</code>, <code>gps1</code>, etc.</p>
<h3 id="current-status">Current status<a class="headerlink" href="#current-status" title="Permanent link"></a></h3>
<pre class="cli"><code>admin@example:/&gt; <b>show hardware</b>
<span class="header">HARDWARE COMPONENTS </span>
──────────────────────────────────────────────────────────────
<span class="title">GPS/GNSS Receivers </span>
Name : gps0
Device : /dev/gps0
Driver : u-blox
Status : Active
Fix : 3D
Satellites : 10/15 (used/visible)
Position : 59.334567N 18.063456E 42.3m
PPS : Available
</code></pre>
<p>Available information per receiver:</p>
<table>
<thead>
<tr>
<th>Field</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td>Name</td>
<td>Component name (<code>gps0</code>, <code>gps1</code>, ...)</td>
</tr>
<tr>
<td>Device</td>
<td>Device path (<code>/dev/gps0</code>)</td>
</tr>
<tr>
<td>Driver</td>
<td>Protocol driver (e.g., <code>u-blox</code>, <code>NMEA</code>, <code>SiRF</code>)</td>
</tr>
<tr>
<td>Status</td>
<td><code>Active</code> or <code>Inactive</code></td>
</tr>
<tr>
<td>Fix</td>
<td><code>NONE</code>, <code>2D</code>, or <code>3D</code></td>
</tr>
<tr>
<td>Satellites</td>
<td>Used/visible count</td>
</tr>
<tr>
<td>Position</td>
<td>Latitude, longitude, altitude (when fix acquired)</td>
</tr>
<tr>
<td>PPS</td>
<td>Pulse Per Second signal availability</td>
</tr>
</tbody>
</table>
<h3 id="configure-gps-receiver">Configure GPS receiver<a class="headerlink" href="#configure-gps-receiver" title="Permanent link"></a></h3>
<p>GPS receivers are hardware components with class <code>gps</code>. The class is
auto-inferred from the component name, similar to WiFi radios (<code>radioN</code>):</p>
<pre class="cli"><code>admin@example:/&gt; <b>configure</b>
admin@example:/config/&gt; <b>set hardware component gps0</b>
admin@example:/config/&gt; <b>leave</b>
</code></pre>
<p>To use a GPS receiver as an NTP reference clock source, see
<a href="../ntp/#gps-reference-clock">NTP — GPS Reference Clock</a>.</p>
<h2 id="usb-ports">USB Ports<a class="headerlink" href="#usb-ports" title="Permanent link"></a></h2>
<p>For Infix to be able to control USB port(s), a device tree modification
is needed (see <em>alder.dtsi</em> for full example).</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="w"> </span><span class="err">chose</span><span class="kc">n</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a><span class="w"> </span><span class="err">i</span><span class="kc">nf</span><span class="err">ix</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a><span class="w"> </span><span class="err">usb</span><span class="mi">-</span><span class="err">por</span><span class="kc">ts</span><span class="w"> </span><span class="err">=</span><span class="w"> </span><span class="err">&lt;&amp;cp</span><span class="mi">0</span><span class="err">_usb</span><span class="mi">3</span><span class="err">_</span><span class="mi">1</span><span class="err">&gt;;</span>
<a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a><span class="w"> </span><span class="err">usb</span><span class="mi">-</span><span class="err">por</span><span class="kc">t</span><span class="mi">-</span><span class="kc">na</span><span class="err">mes</span><span class="w"> </span><span class="err">=</span><span class="w"> </span><span class="s2">"USB"</span><span class="err">;</span>
<a id="__codelineno-0-5" name="__codelineno-0-5" href="#__codelineno-0-5"></a><span class="w"> </span><span class="p">}</span><span class="err">;</span>
<a id="__codelineno-0-6" name="__codelineno-0-6" href="#__codelineno-0-6"></a><span class="w"> </span><span class="p">}</span><span class="err">;</span>
</code></pre></div>
<p>Two USB ports are also exposed in QEMU for test purpose.</p>
<p>All USB ports in the system will be disabled during boot due to the file
<code>board/common/rootfs/etc/modprobe.d/usbcore.conf</code>. If you do not want
Infix to control USB port(s), remove the file or manually enable the USB
bus, here is an example:</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="c1"># Enable the bus</span>
<a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a><span class="nb">echo</span><span class="w"> </span><span class="m">1</span><span class="w"> </span>&gt;<span class="w"> </span>/sys/bus/usb/devices/usb1/authorized
</code></pre></div>
<p>And then enable sub-devices (e.g. USB memory)</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a><span class="c1"># Enable a device plugged into usb1</span>
<a id="__codelineno-2-2" name="__codelineno-2-2" href="#__codelineno-2-2"></a><span class="nb">echo</span><span class="w"> </span><span class="m">1</span><span class="w"> </span>&gt;<span class="w"> </span>/sys/bus/usb/devices/usb1/1-1/authorized
</code></pre></div>
<h3 id="current-status_1">Current status<a class="headerlink" href="#current-status_1" title="Permanent link"></a></h3>
<pre class="cli"><code>admin@example:/&gt; <b>show hardware</b>
<span class="header">HARDWARE COMPONENTS </span>
──────────────────────────────────────────────────────────────
<span class="title">Board Information </span>
Model : FriendlyElec NanoPi R2S
Manufacturer : FriendlyElec
Serial Number : 9d1fbfdab6d171ce
Base MAC Address : 4a:dc:d8:20:0d:85
──────────────────────────────────────────────────────────────
<span class="title">USB Ports </span>
<span class="header">NAME STATE OPER </span>
USB unlocked enabled
──────────────────────────────────────────────────────────────
<span class="title">Sensors </span>
<span class="header">NAME VALUE STATUS </span>
soc 44.1 °C ok
soc 44.5 °C ok
</code></pre>
<p>An USB port can be in two states <em>unlocked</em> and <em>locked</em>. When a port is
locked, all connected devices will get power, but never authorized by
Linux to use.</p>
<h3 id="configure-usb-port">Configure USB port<a class="headerlink" href="#configure-usb-port" title="Permanent link"></a></h3>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>You can only configure USB ports known to the system. See the CLI
command <code>show hardware</code> in admin-exec context. (Use <code>do</code> prefix in
configure context.)</p>
</div>
<pre class="cli"><code>admin@example:/&gt; <b>configure</b>
admin@example:/config/&gt; <b>set hardware component USB state admin-state unlocked</b>
admin@example:/config/&gt; <b>leave</b>
admin@example:/&gt;
</code></pre>
<h3 id="using-a-usb-stick">Using a USB Stick<a class="headerlink" href="#using-a-usb-stick" title="Permanent link"></a></h3>
<p>With the USB port unlocked, a memory stick can be used to expand the
storage of the device. Plug it in, either directly, or via a USB hub.
All partitions of <em>VFAT</em> or <em>exFAT</em> type are automatically mounted to
the <code>/media/&lt;LABLEL&gt;</code> directory, e.g., <code>/media/memorystick</code>, or if a
partition does not have a label, using the kernel device name, e.g.,
<code>/media/sda</code>.</p>
<p>Depending on the partition type the the media is either mounted in
<code>flush</code> or <code>sync</code> mode to ensure files are properly flushed to the
backing store of the memory stick. This to protect against users
yanking out a device before file(s) have been written to it.</p>
<p>The only way currently to safely "eject" a USB memory stick is to use
<code>umount</code> command from a UNIX shell, which explicitly synchronizes any
cached data to disk before returning the prompt:</p>
<pre class="cli"><code>admin@example:~$ <b>sudo umount /media/log</b>
</code></pre>
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