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<div class="header">
  <div class="summary">
<a href="#pub-methods">Public Member Functions</a> &#124;
<a href="#pub-static-attribs">Static Public Attributes</a> &#124;
<a href="class_fat_cache-members.html">List of all members</a>  </div>
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<div class="title">FatCache Class Reference</div>  </div>
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<p>Sector cache.  
 <a href="class_fat_cache.html#details">More...</a></p>

<p><code>#include &lt;FatPartition.h&gt;</code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a50b61cdeeff5c5dfd2a4bd7430ef19ac"><td class="memItemLeft" align="right" valign="top"><a class="el" href="unioncache__t.html">cache_t</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#a50b61cdeeff5c5dfd2a4bd7430ef19ac">buffer</a> ()</td></tr>
<tr class="separator:a50b61cdeeff5c5dfd2a4bd7430ef19ac"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab4d3b0c16bb6a116c7d01afff2dcb307"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#ab4d3b0c16bb6a116c7d01afff2dcb307">dirty</a> ()</td></tr>
<tr class="separator:ab4d3b0c16bb6a116c7d01afff2dcb307"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a30790e03daad69b62ec6d7d643975454"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#a30790e03daad69b62ec6d7d643975454">init</a> (<a class="el" href="class_fat_partition.html">FatPartition</a> *vol)</td></tr>
<tr class="separator:a30790e03daad69b62ec6d7d643975454"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a70071a128d647b49b523dbb2f5f944a5"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#a70071a128d647b49b523dbb2f5f944a5">invalidate</a> ()</td></tr>
<tr class="separator:a70071a128d647b49b523dbb2f5f944a5"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae50287d95bd78558db1e4aa97d7b2c06"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#ae50287d95bd78558db1e4aa97d7b2c06">isDirty</a> ()</td></tr>
<tr class="separator:ae50287d95bd78558db1e4aa97d7b2c06"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a9c3d0dfa0d987f2c8dbad2d35024b56b"><td class="memItemLeft" align="right" valign="top"><a class="el" href="unioncache__t.html">cache_t</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#a9c3d0dfa0d987f2c8dbad2d35024b56b">read</a> (uint32_t <a class="el" href="class_fat_cache.html#a1a9d892b5a68463598bb39d2732cb664">sector</a>, uint8_t option)</td></tr>
<tr class="separator:a9c3d0dfa0d987f2c8dbad2d35024b56b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a1a9d892b5a68463598bb39d2732cb664"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#a1a9d892b5a68463598bb39d2732cb664">sector</a> ()</td></tr>
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<tr class="memitem:a4d76d4f46ce5994f6fc4678a7b4f8cf1"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#a4d76d4f46ce5994f6fc4678a7b4f8cf1">sync</a> ()</td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-attribs"></a>
Static Public Attributes</h2></td></tr>
<tr class="memitem:ab4b446515ff9a0cebc747630ddd10c93"><td class="memItemLeft" align="right" valign="top">static const uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#ab4b446515ff9a0cebc747630ddd10c93">CACHE_FOR_READ</a> = 0</td></tr>
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<tr class="memitem:a81cb572f33443bd6aee9aa33ec395d0f"><td class="memItemLeft" align="right" valign="top">static const uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#a81cb572f33443bd6aee9aa33ec395d0f">CACHE_FOR_WRITE</a> = <a class="el" href="class_fat_cache.html#aac8c38e5c545d0f80b13d816117f626e">CACHE_STATUS_DIRTY</a></td></tr>
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<tr class="memitem:adf974f55e53ee0aaa85abb0d7d67181c"><td class="memItemLeft" align="right" valign="top">static const uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#adf974f55e53ee0aaa85abb0d7d67181c">CACHE_OPTION_NO_READ</a> = 4</td></tr>
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<tr class="memitem:a49d2896ff525ab77852f76df5c2a09c2"><td class="memItemLeft" align="right" valign="top">static const uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#a49d2896ff525ab77852f76df5c2a09c2">CACHE_RESERVE_FOR_WRITE</a> = <a class="el" href="class_fat_cache.html#aac8c38e5c545d0f80b13d816117f626e">CACHE_STATUS_DIRTY</a> | <a class="el" href="class_fat_cache.html#adf974f55e53ee0aaa85abb0d7d67181c">CACHE_OPTION_NO_READ</a></td></tr>
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<tr class="memitem:aac8c38e5c545d0f80b13d816117f626e"><td class="memItemLeft" align="right" valign="top">static const uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#aac8c38e5c545d0f80b13d816117f626e">CACHE_STATUS_DIRTY</a> = 1</td></tr>
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<tr class="memitem:ab70dc4a2e387f0e9bf392044c702ae32"><td class="memItemLeft" align="right" valign="top">static const uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#ab70dc4a2e387f0e9bf392044c702ae32">CACHE_STATUS_MASK</a> = <a class="el" href="class_fat_cache.html#aac8c38e5c545d0f80b13d816117f626e">CACHE_STATUS_DIRTY</a> | <a class="el" href="class_fat_cache.html#a45236e1c0a2a098f08d3add0e4b1467a">CACHE_STATUS_MIRROR_FAT</a></td></tr>
<tr class="separator:ab70dc4a2e387f0e9bf392044c702ae32"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a45236e1c0a2a098f08d3add0e4b1467a"><td class="memItemLeft" align="right" valign="top">static const uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_cache.html#a45236e1c0a2a098f08d3add0e4b1467a">CACHE_STATUS_MIRROR_FAT</a> = 2</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Sector cache. </p>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a id="a50b61cdeeff5c5dfd2a4bd7430ef19ac"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a50b61cdeeff5c5dfd2a4bd7430ef19ac">&#9670;&nbsp;</a></span>buffer()</h2>

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          <td class="memname"><a class="el" href="unioncache__t.html">cache_t</a>* FatCache::buffer </td>
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<dl class="section return"><dt>Returns</dt><dd>Cache sector address. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ab4d3b0c16bb6a116c7d01afff2dcb307">&#9670;&nbsp;</a></span>dirty()</h2>

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          <td class="memname">void FatCache::dirty </td>
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<p>Set current sector dirty. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#a30790e03daad69b62ec6d7d643975454">&#9670;&nbsp;</a></span>init()</h2>

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          <td class="memname">void FatCache::init </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="class_fat_partition.html">FatPartition</a> *&#160;</td>
          <td class="paramname"><em>vol</em></td><td>)</td>
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<p>Initialize the cache. </p><dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramdir">[in]</td><td class="paramname">vol</td><td><a class="el" href="class_fat_partition.html" title="Access FAT16 and FAT32 partitions on raw file devices.">FatPartition</a> that owns this <a class="el" href="class_fat_cache.html" title="Sector cache.">FatCache</a>. </td></tr>
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  </dd>
</dl>

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<a id="a70071a128d647b49b523dbb2f5f944a5"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a70071a128d647b49b523dbb2f5f944a5">&#9670;&nbsp;</a></span>invalidate()</h2>

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          <td class="memname">void FatCache::invalidate </td>
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<p>Invalidate current cache sector. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#ae50287d95bd78558db1e4aa97d7b2c06">&#9670;&nbsp;</a></span>isDirty()</h2>

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<dl class="section return"><dt>Returns</dt><dd>dirty status </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#a9c3d0dfa0d987f2c8dbad2d35024b56b">&#9670;&nbsp;</a></span>read()</h2>

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          <td class="memname"><a class="el" href="unioncache__t.html">cache_t</a> * FatCache::read </td>
          <td>(</td>
          <td class="paramtype">uint32_t&#160;</td>
          <td class="paramname"><em>sector</em>, </td>
        </tr>
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          <td class="paramkey"></td>
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          <td class="paramtype">uint8_t&#160;</td>
          <td class="paramname"><em>option</em>&#160;</td>
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<p>Read a sector into the cache. </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">sector</td><td>Sector to read. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">option</td><td>mode for cached sector. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>Address of cached sector. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#a1a9d892b5a68463598bb39d2732cb664">&#9670;&nbsp;</a></span>sector()</h2>

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<dl class="section return"><dt>Returns</dt><dd>Logical sector number for cached sector. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#a4d76d4f46ce5994f6fc4678a7b4f8cf1">&#9670;&nbsp;</a></span>sync()</h2>

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          <td class="memname">bool FatCache::sync </td>
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<p>Write current sector if dirty. </p><dl class="section return"><dt>Returns</dt><dd>true for success or false for failure. </dd></dl>

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<h2 class="groupheader">Member Data Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#ab4b446515ff9a0cebc747630ddd10c93">&#9670;&nbsp;</a></span>CACHE_FOR_READ</h2>

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          <td class="memname">const uint8_t FatCache::CACHE_FOR_READ = 0</td>
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<p>Cache sector for read. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#a81cb572f33443bd6aee9aa33ec395d0f">&#9670;&nbsp;</a></span>CACHE_FOR_WRITE</h2>

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          <td class="memname">const uint8_t FatCache::CACHE_FOR_WRITE = <a class="el" href="class_fat_cache.html#aac8c38e5c545d0f80b13d816117f626e">CACHE_STATUS_DIRTY</a></td>
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<p>Cache sector for write. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#adf974f55e53ee0aaa85abb0d7d67181c">&#9670;&nbsp;</a></span>CACHE_OPTION_NO_READ</h2>

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<p>Sync existing sector but do not read new sector. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#a49d2896ff525ab77852f76df5c2a09c2">&#9670;&nbsp;</a></span>CACHE_RESERVE_FOR_WRITE</h2>

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          <td class="memname">const uint8_t FatCache::CACHE_RESERVE_FOR_WRITE = <a class="el" href="class_fat_cache.html#aac8c38e5c545d0f80b13d816117f626e">CACHE_STATUS_DIRTY</a> | <a class="el" href="class_fat_cache.html#adf974f55e53ee0aaa85abb0d7d67181c">CACHE_OPTION_NO_READ</a></td>
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<p>Reserve cache sector for write - do not read from sector device. </p>

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<h2 class="memtitle"><span class="permalink"><a href="#aac8c38e5c545d0f80b13d816117f626e">&#9670;&nbsp;</a></span>CACHE_STATUS_DIRTY</h2>

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          <td class="memname">const uint8_t FatCache::CACHE_STATUS_DIRTY = 1</td>
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<p>Cached sector is dirty </p>

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<h2 class="memtitle"><span class="permalink"><a href="#ab70dc4a2e387f0e9bf392044c702ae32">&#9670;&nbsp;</a></span>CACHE_STATUS_MASK</h2>

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          <td class="memname">const uint8_t FatCache::CACHE_STATUS_MASK = <a class="el" href="class_fat_cache.html#aac8c38e5c545d0f80b13d816117f626e">CACHE_STATUS_DIRTY</a> | <a class="el" href="class_fat_cache.html#a45236e1c0a2a098f08d3add0e4b1467a">CACHE_STATUS_MIRROR_FAT</a></td>
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<p>Cache sector status bits </p>

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<h2 class="memtitle"><span class="permalink"><a href="#a45236e1c0a2a098f08d3add0e4b1467a">&#9670;&nbsp;</a></span>CACHE_STATUS_MIRROR_FAT</h2>

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          <td class="memname">const uint8_t FatCache::CACHE_STATUS_MIRROR_FAT = 2</td>
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<p>Cashed sector is FAT entry and must be mirrored in second FAT. </p>

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<hr/>The documentation for this class was generated from the following files:<ul>
<li>ArduinoSdFat/libraries/SdFat/src/FatLib/<a class="el" href="_fat_partition_8h.html">FatPartition.h</a></li>
<li>ArduinoSdFat/libraries/SdFat/src/FatLib/FatPartition.cpp</li>
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