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SdFat


			
				
					
						
						
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<a href="#pub-methods">Public Member Functions</a> &#124;
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<div class="title">FatFileSystem Class Reference</div>  </div>
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<p>Integration class for the FatLib library.  
 <a href="class_fat_file_system.html#details">More...</a></p>

<p><code>#include &lt;FatFileSystem.h&gt;</code></p>
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Inheritance diagram for FatFileSystem:</div>
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Collaboration diagram for FatFileSystem:</div>
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<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:a5dda20d3dcbfc8c641babbb2c9aac382"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_file_system.html#a5dda20d3dcbfc8c641babbb2c9aac382">begin</a> (<a class="el" href="_block_driver_8h.html#ace97f2377acdc471a01f9f7ec1fd6bbb">BlockDriver</a> *blockDev, uint8_t part=0)</td></tr>
<tr class="separator:a5dda20d3dcbfc8c641babbb2c9aac382"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a06beed4cea5e38116b58254a57125442"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_volume.html#a06beed4cea5e38116b58254a57125442">blocksPerCluster</a> () const </td></tr>
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<tr class="memitem:abc66d856d05198d9ebe7104c8c4155d7"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_volume.html#abc66d856d05198d9ebe7104c8c4155d7">blocksPerFat</a> () const </td></tr>
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<tr class="memitem:aa1e3b1d0c21d202deb82668068ab00e8"><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_volume.html#aa1e3b1d0c21d202deb82668068ab00e8">cacheClear</a> ()</td></tr>
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<tr class="memitem:a5667915e63187a43a71dfada63800865"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_file_system.html#a5667915e63187a43a71dfada63800865">chdir</a> (bool set_cwd=false)</td></tr>
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<tr class="memitem:a44af1b98e8d986d12107b654453acbc4"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_file_system.html#a44af1b98e8d986d12107b654453acbc4">chdir</a> (const char *path, bool set_cwd=false)</td></tr>
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<tr class="memitem:af24917d6e00c8766dab168eb834047ec"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_file_system.html#af24917d6e00c8766dab168eb834047ec">chvol</a> ()</td></tr>
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<tr class="memitem:a18446a9c5924304fa7a87d5f03ccaf21"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_volume.html#a18446a9c5924304fa7a87d5f03ccaf21">clusterCount</a> () const </td></tr>
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<tr class="memitem:ac0e63f33d71d5dc95a602834274def6a"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_volume.html#ac0e63f33d71d5dc95a602834274def6a">clusterSizeShift</a> () const </td></tr>
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<tr class="memitem:a25c6311b70fa274b3be94ff25fdebba7"><td class="memItemLeft" align="right" valign="top">int8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_volume.html#a25c6311b70fa274b3be94ff25fdebba7">dbgFat</a> (uint32_t n, uint32_t *v)</td></tr>
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<tr class="memitem:a034d997a1e7a0b2b664a4357bcccd256"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_volume.html#a034d997a1e7a0b2b664a4357bcccd256">init</a> (uint8_t part)</td></tr>
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<tr class="memitem:a122b61dbec5051304bcc81bc08b1b99d"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_file_system.html#a122b61dbec5051304bcc81bc08b1b99d">ls</a> (const char *path, uint8_t flags=0)</td></tr>
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<tr class="memitem:ae12fb8bfad5c4a8e052dda70a5a0ed93"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_file_system.html#ae12fb8bfad5c4a8e052dda70a5a0ed93">ls</a> (<a class="el" href="_fat_volume_8h.html#ac62f6449331cfe1a71f29be30efe7890">print_t</a> *pr, uint8_t flags=0)</td></tr>
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<tr class="memitem:aa79695db8e910300507210b3067d39fd"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_file_system.html#aa79695db8e910300507210b3067d39fd">ls</a> (<a class="el" href="_fat_volume_8h.html#ac62f6449331cfe1a71f29be30efe7890">print_t</a> *pr, const char *path, uint8_t flags)</td></tr>
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<tr class="memitem:a231c62c98ba8ac3c2624dc5ad2053ebf"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_file_system.html#a231c62c98ba8ac3c2624dc5ad2053ebf">mkdir</a> (const char *path, bool pFlag=true)</td></tr>
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<tr class="memitem:a947e4586077a922892b632edac33b67a"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_file.html">File</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_file_system.html#a947e4586077a922892b632edac33b67a">open</a> (const char *path, uint8_t mode=<a class="el" href="_arduino_files_8h.html#ad52d51659a75e25d96fb04d22ff718cb">FILE_READ</a>)</td></tr>
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<tr class="memitem:a4ca68fe47bb675df0a80df1ed7a53698"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_fat_volume.html">FatVolume</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_file_system.html#a4ca68fe47bb675df0a80df1ed7a53698">vol</a> ()</td></tr>
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<tr class="memitem:acf257d02b7166683bda2abc5058004bf"><td class="memItemLeft" align="right" valign="top"><a class="el" href="class_fat_file.html">FatFile</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_file_system.html#acf257d02b7166683bda2abc5058004bf">vwd</a> ()</td></tr>
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<tr class="memitem:a36d7831f92acfbfef1c4a24dd7103dc4"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="class_fat_file_system.html#a36d7831f92acfbfef1c4a24dd7103dc4">wipe</a> (<a class="el" href="_fat_volume_8h.html#ac62f6449331cfe1a71f29be30efe7890">print_t</a> *pr=0)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Integration class for the FatLib library. </p>
</div><h2 class="groupheader">Member Function Documentation</h2>
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          <td class="memname">bool FatFileSystem::begin </td>
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<p>Initialize an <a class="el" href="class_fat_file_system.html" title="Integration class for the FatLib library. ">FatFileSystem</a> object. </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">blockDev</td><td>Device block driver. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">part</td><td>partition to initialize. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>The value true is returned for success and the value false is returned for failure. </dd></dl>

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<dl class="section return"><dt>Returns</dt><dd>The volume's cluster size in blocks. </dd></dl>

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<dl class="section return"><dt>Returns</dt><dd>The number of blocks in one FAT. </dd></dl>

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          <td class="memname"><a class="el" href="unioncache__t.html">cache_t</a>* FatVolume::cacheClear </td>
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<p>Clear the cache and returns a pointer to the cache. Not for normal apps. </p><dl class="section return"><dt>Returns</dt><dd>A pointer to the cache buffer or zero if an error occurs. </dd></dl>

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          <td class="memname">bool FatFileSystem::chdir </td>
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<p>Change a volume's working directory to root</p>
<p>Changes the volume's working directory to the SD's root directory. Optionally set the current working directory to the volume's working directory.</p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramdir">[in]</td><td class="paramname">set_cwd</td><td>Set the current working directory to this volume's working directory if true.</td></tr>
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<dl class="section return"><dt>Returns</dt><dd>The value true is returned for success and the value false is returned for failure. </dd></dl>

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<p>Change a volume's working directory</p>
<p>Changes the volume working directory to the <em>path</em> subdirectory. Optionally set the current working directory to the volume's working directory.</p>
<p>Example: If the volume's working directory is "/DIR", chdir("SUB") will change the volume's working directory from "/DIR" to "/DIR/SUB".</p>
<p>If path is "/", the volume's working directory will be changed to the root directory</p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramdir">[in]</td><td class="paramname">path</td><td>The name of the subdirectory.</td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">set_cwd</td><td>Set the current working directory to this volume's working directory if true.</td></tr>
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<dl class="section return"><dt>Returns</dt><dd>The value true is returned for success and the value false is returned for failure. </dd></dl>

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<p>Set the current working directory to a volume's working directory.</p>
<p>This is useful with multiple SD cards.</p>
<p>The current working directory is changed to this volume's working directory.</p>
<p>This is like the Windows/DOS &lt;drive letter&gt;: command. </p>

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<dl class="section return"><dt>Returns</dt><dd>The total number of clusters in the volume. </dd></dl>

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<dl class="section return"><dt>Returns</dt><dd>The shift count required to multiply by blocksPerCluster. </dd></dl>

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<dl class="section return"><dt>Returns</dt><dd>The logical block number for the start of file data. </dd></dl>

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<p>Debug access to FAT table</p>
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    <tr><td class="paramdir">[in]</td><td class="paramname">n</td><td>cluster number. </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">v</td><td>value of entry </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>true for success or false for failure </dd></dl>

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<p>Test for the existence of a file.</p>
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    <tr><td class="paramdir">[in]</td><td class="paramname">path</td><td>Path of the file to be tested for.</td></tr>
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<dl class="section return"><dt>Returns</dt><dd>true if the file exists else false. </dd></dl>

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<dl class="section return"><dt>Returns</dt><dd>The number of <a class="el" href="class_file.html" title="Arduino SD.h style File API. ">File</a> Allocation Tables. </dd></dl>

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<dl class="section return"><dt>Returns</dt><dd>The logical block number for the start of the first FAT. </dd></dl>

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<dl class="section return"><dt>Returns</dt><dd>The FAT type of the volume. Values are 12, 16 or 32. </dd></dl>

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<p>Volume free space in clusters.</p>
<dl class="section return"><dt>Returns</dt><dd>Count of free clusters for success or -1 if an error occurs. </dd></dl>

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          <td class="memname">bool FatVolume::init </td>
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          <td class="paramname"></td><td>)</td>
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<p>Initialize a FAT volume. Try partition one first then try super floppy format.</p>
<dl class="section return"><dt>Returns</dt><dd>The value true is returned for success and the value false is returned for failure. </dd></dl>

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          <td class="memname">bool FatVolume::init </td>
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          <td class="paramtype">uint8_t&#160;</td>
          <td class="paramname"><em>part</em></td><td>)</td>
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<p>Initialize a FAT volume.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">part</td><td>The partition to be used. Legal values for <em>part</em> are 1-4 to use the corresponding partition on a device formatted with a MBR, Master Boot Record, or zero if the device is formatted as a super floppy with the FAT boot sector in block zero.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The value true is returned for success and the value false is returned for failure. </dd></dl>

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          <td class="memname">void FatFileSystem::ls </td>
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          <td class="paramname"><em>flags</em> = <code>0</code></td><td>)</td>
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<p>List the directory contents of the volume working directory to Serial.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">flags</td><td>The inclusive OR of</td></tr>
  </table>
  </dd>
</dl>
<p>LS_DATE - Print file modification date</p>
<p>LS_SIZE - Print file size.</p>
<p>LS_R - Recursive list of subdirectories. </p>

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          <td class="memname">void FatFileSystem::ls </td>
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          <td class="paramname"><em>path</em>, </td>
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<p>List the directory contents of a directory to Serial.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">path</td><td>directory to list.</td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">flags</td><td>The inclusive OR of</td></tr>
  </table>
  </dd>
</dl>
<p>LS_DATE - Print file modification date</p>
<p>LS_SIZE - Print file size.</p>
<p>LS_R - Recursive list of subdirectories. </p>

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          <td class="memname">void FatFileSystem::ls </td>
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<p>List the directory contents of the volume working directory.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">pr</td><td>Print stream for list.</td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">flags</td><td>The inclusive OR of</td></tr>
  </table>
  </dd>
</dl>
<p>LS_DATE - Print file modification date</p>
<p>LS_SIZE - Print file size.</p>
<p>LS_R - Recursive list of subdirectories. </p>

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          <td class="memname">void FatFileSystem::ls </td>
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<p>List the directory contents of a directory.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">pr</td><td>Print stream for list.</td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">path</td><td>directory to list.</td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">flags</td><td>The inclusive OR of</td></tr>
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  </dd>
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<p>LS_DATE - Print file modification date</p>
<p>LS_SIZE - Print file size.</p>
<p>LS_R - Recursive list of subdirectories. </p>

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<p>Make a subdirectory in the volume working directory.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">path</td><td>A path with a valid 8.3 DOS name for the subdirectory.</td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">pFlag</td><td>Create missing parent directories if true.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The value true is returned for success and the value false is returned for failure. </dd></dl>

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          <td class="memname"><a class="el" href="class_file.html">File</a> FatFileSystem::open </td>
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<p>open a file</p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramdir">[in]</td><td class="paramname">path</td><td>location of file to be opened. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">mode</td><td>open mode flags. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>a <a class="el" href="class_file.html" title="Arduino SD.h style File API. ">File</a> object. </dd></dl>

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          <td class="memname"><a class="el" href="class_file.html">File</a> FatFileSystem::open </td>
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<p>open a file</p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramdir">[in]</td><td class="paramname">path</td><td>location of file to be opened. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">mode</td><td>open mode flags. </td></tr>
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  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>a <a class="el" href="class_file.html" title="Arduino SD.h style File API. ">File</a> object. </dd></dl>

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          <td class="memname">bool FatFileSystem::remove </td>
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<p>Remove a file from the volume working directory.</p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramdir">[in]</td><td class="paramname">path</td><td>A path with a valid 8.3 DOS name for the file.</td></tr>
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<dl class="section return"><dt>Returns</dt><dd>The value true is returned for success and the value false is returned for failure. </dd></dl>

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<p>Rename a file or subdirectory.</p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramdir">[in]</td><td class="paramname">oldPath</td><td>Path name to the file or subdirectory to be renamed.</td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">newPath</td><td>New path name of the file or subdirectory.</td></tr>
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  </dd>
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<p>The <em>newPath</em> object must not exist before the rename call.</p>
<p>The file to be renamed must not be open. The directory entry may be moved and file system corruption could occur if the file is accessed by a file object that was opened before the <a class="el" href="class_fat_file_system.html#a0187891a24017b41bd7c5ba63e659e65">rename()</a> call.</p>
<dl class="section return"><dt>Returns</dt><dd>The value true is returned for success and the value false is returned for failure. </dd></dl>

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<p>Remove a subdirectory from the volume's working directory.</p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramdir">[in]</td><td class="paramname">path</td><td>A path with a valid 8.3 DOS name for the subdirectory.</td></tr>
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  </dd>
</dl>
<p>The subdirectory file will be removed only if it is empty.</p>
<dl class="section return"><dt>Returns</dt><dd>The value true is returned for success and the value false is returned for failure. </dd></dl>

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<dl class="section return"><dt>Returns</dt><dd>The number of entries in the root directory for FAT16 volumes. </dd></dl>

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<dl class="section return"><dt>Returns</dt><dd>The logical block number for the start of the root directory on FAT16 volumes or the first cluster number on FAT32 volumes. </dd></dl>

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          <td class="paramtype">const char *&#160;</td>
          <td class="paramname"><em>path</em>, </td>
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          <td></td>
          <td class="paramtype">uint32_t&#160;</td>
          <td class="paramname"><em>length</em>&#160;</td>
        </tr>
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          <td>)</td>
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<p>Truncate a file to a specified length. The current file position will be maintained if it is less than or equal to <em>length</em> otherwise it will be set to end of file.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">path</td><td>A path with a valid 8.3 DOS name for the file. </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">length</td><td>The desired length for the file.</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The value true is returned for success and the value false is returned for failure. </dd></dl>

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          <td class="memname"><a class="el" href="class_fat_volume.html">FatVolume</a>* FatFileSystem::vol </td>
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          <td class="paramname"></td><td>)</td>
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<dl class="section return"><dt>Returns</dt><dd>a pointer to the <a class="el" href="class_fat_volume.html" title="Access FAT16 and FAT32 volumes on raw file devices. ">FatVolume</a> object. </dd></dl>

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          <td> const</td>
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<dl class="section return"><dt>Returns</dt><dd>The number of blocks in the volume </dd></dl>

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          <td class="memname"><a class="el" href="class_fat_file.html">FatFile</a>* FatFileSystem::vwd </td>
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<dl class="section return"><dt>Returns</dt><dd>a pointer to the volume working directory. </dd></dl>

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          <td class="memname">bool FatFileSystem::wipe </td>
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          <td class="paramtype"><a class="el" href="_fat_volume_8h.html#ac62f6449331cfe1a71f29be30efe7890">print_t</a> *&#160;</td>
          <td class="paramname"><em>pr</em> = <code>0</code></td><td>)</td>
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<p>Wipe all data from the volume. You must reinitialize the volume before accessing it again. </p><dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramdir">[in]</td><td class="paramname">pr</td><td>print stream for status dots. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>true for success else false. </dd></dl>

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<hr/>The documentation for this class was generated from the following file:<ul>
<li>Arduino/libraries/SdFat/src/FatLib/<a class="el" href="_fat_file_system_8h.html">FatFileSystem.h</a></li>
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