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  <div class="section" id="sniffer-window">
<h1><span class="section-number">45. </span>Sniffer Window<a class="headerlink" href="#sniffer-window" title="Permalink to this headline">¶</a></h1>
<p>.</p>
<img alt="_images/Sniffer.png" src="_images/Sniffer.png" />
</div>
<div class="section" id="using-the-sniffer-window">
<h1><span class="section-number">46. </span>Using the Sniffer Window<a class="headerlink" href="#using-the-sniffer-window" title="Permalink to this headline">¶</a></h1>
<p>This window is essentially a turbo charged graphical version of the linux
can_utils program “cansniffer”. The general idea here is to display a list
of frames such that you only see frames that are actively updating. If a given
ID has not been seen in 5 seconds the ID portion will turn RED and then disappear
from the list. In this way only frames that are updating are in the list. They are
ordered by ID. Bytes that have decremented will be red and bytes that have incremented
will be green. You can use the “Filters” area to mask away some IDs so that they never
show up. This can help to declutter the list.</p>
<p>This window updates with a 200ms interval.</p>
</div>
<div class="section" id="notching-and-unnotching">
<h1><span class="section-number">47. </span>Notching and Unnotching<a class="headerlink" href="#notching-and-unnotching" title="Permalink to this headline">¶</a></h1>
<p>While the window is running it keeps a running list each 200ms cycle of all the bits that
changed in that timespan. Each 200ms this list is backed up and reset. If you push the
notch button the system will remember all the bits that were set in the last 200ms window
and will not color the output if those bits are toggled in the future. They will thus somewhat
be ignored except that you can visually still see them updating. If you click the Notch
button repeatedly it will add any new changed bits to the old changed bits. In this way you
can build up a set of bits to ignore. Un-notching causes all notched (ignored) bits to be
reset and thus all changes will be colored once again.</p>
</div>
<div class="section" id="advanced-options">
<h1><span class="section-number">48. </span>Advanced Options<a class="headerlink" href="#advanced-options" title="Permalink to this headline">¶</a></h1>
<p>All of the above was valid if you do not check any of the four checkboxes. With the checkboxes
unchecked this window is very close to cansniffer on the command line. But, what fun is that?
These checkboxes modify the way the window works in a variety of ways.</p>
</div>
<div class="section" id="never-expire-ids">
<h1><span class="section-number">49. </span>Never Expire IDs<a class="headerlink" href="#never-expire-ids" title="Permalink to this headline">¶</a></h1>
<p>This checkbox will do exactly what it says on the tin. Instead of frame ID’s expiring after
5 seconds of inactivity they will stick around forever. This can be useful so that the ID you
are watching doesn’t jump up and down as IDs expire and potentially come back later on or new IDs
are seen. With no expiration you will get a more consistent view of the IDs. You are still free
to filter away IDs you are not interested in.</p>
</div>
<div class="section" id="mute-notched-bits">
<h1><span class="section-number">50. </span>Mute notched bits<a class="headerlink" href="#mute-notched-bits" title="Permalink to this headline">¶</a></h1>
<p>This checkbox might sound a bit strange. With this checked any bytes that you have notched will
ignore any notched bits and not even change the display to update if only notched bits were changed.
This completely hides all notched data. The view of the frames will then NOT perfectly or correctly
represent the actual most up to date data for each ID. So, use this option with caution. But, it
is handy when you are looking for a needle in a haystack and you don’t want things changing if you’ve
already told the program to notch them away.</p>
</div>
<div class="section" id="fade-inactive-bytes">
<h1><span class="section-number">51. </span>Fade inactive bytes<a class="headerlink" href="#fade-inactive-bytes" title="Permalink to this headline">¶</a></h1>
<p>This can be used with mute or without but has a similar purpose. When this is checked any bytes
that haven’t updated recently will begin to fade away to white. They never quite get all the way
to disappearing but will fade to be very light. In this way only data which is actively changing will
be very visible. This drastically aids in helping you to ignore any bytes that are not changing.</p>
</div>
<div class="section" id="view-bits">
<h1><span class="section-number">52. </span>View Bits<a class="headerlink" href="#view-bits" title="Permalink to this headline">¶</a></h1>
<p>This option changes the view very starkly. This is the view shown in the picture associated with this topic. When View Bits is selected the display will change to show each bit within the bytes as separate blocks that each can separately be black when set and unchanged, white when unset and unchanged, red when freshly unset, and green when freshly set. This allows for a very fine grained view. Fade inactive, and never expire still work as usual. This mode might be a bit “busy” and lowers the number of IDs you can see at once. But, the choice is yours. You give up some density in exchange for verbosity.</p>
</div>


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<li class="toctree-l1 current"><a class="current reference internal" href="#">45. Sniffer Window</a></li>
<li class="toctree-l1"><a class="reference internal" href="#using-the-sniffer-window">46. Using the Sniffer Window</a></li>
<li class="toctree-l1"><a class="reference internal" href="#notching-and-unnotching">47. Notching and Unnotching</a></li>
<li class="toctree-l1"><a class="reference internal" href="#advanced-options">48. Advanced Options</a></li>
<li class="toctree-l1"><a class="reference internal" href="#never-expire-ids">49. Never Expire IDs</a></li>
<li class="toctree-l1"><a class="reference internal" href="#mute-notched-bits">50. Mute notched bits</a></li>
<li class="toctree-l1"><a class="reference internal" href="#fade-inactive-bytes">51. Fade inactive bytes</a></li>
<li class="toctree-l1"><a class="reference internal" href="#view-bits">52. View Bits</a></li>
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<li class="toctree-l1"><a class="reference internal" href="rangestate.html#using-the-range-state-window">66. Using the Range State Window</a></li>
<li class="toctree-l1"><a class="reference internal" href="uds_scanner.html">67. UDS Scan Window</a></li>
<li class="toctree-l1"><a class="reference internal" href="uds_scanner.html#purpose-of-the-uds-scan-window">68. Purpose of the UDS Scan Window</a></li>
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<li class="toctree-l1"><a class="reference internal" href="customsender.html#general-overview">75. General Overview</a></li>
<li class="toctree-l1"><a class="reference internal" href="customsender.html#layout-of-the-view">76. Layout of the View</a></li>
<li class="toctree-l1"><a class="reference internal" href="customsender.html#writing-trigger-rules">77. Writing Trigger Rules</a></li>
<li class="toctree-l1"><a class="reference internal" href="customsender.html#writing-modifications">78. Writing Modifications</a></li>
<li class="toctree-l1"><a class="reference internal" href="scriptingwindow.html">79. Scripting Interface</a></li>
<li class="toctree-l1"><a class="reference internal" href="scriptingwindow.html#purpose-of-the-scripting-interface">80. Purpose of the Scripting Interface</a></li>
<li class="toctree-l1"><a class="reference internal" href="scriptingwindow.html#managing-scripts">81. Managing Scripts</a></li>
<li class="toctree-l1"><a class="reference internal" href="scriptingwindow.html#getting-script-status">82. Getting Script Status</a></li>
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<li class="toctree-l1"><a class="reference internal" href="scriptingwindow.html#the-host-object">85. The host Object</a></li>
<li class="toctree-l1"><a class="reference internal" href="scriptingwindow.html#the-can-object">86. The can Object</a></li>
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<li class="toctree-l1"><a class="reference internal" href="scriptingwindow.html#a-full-example-script">89. A full example script</a></li>
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