group__partition.html

SD卡和FAT16读写源代码 支持长文件名和子目录

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          <td class="md" nowrap valign="top">typedef uint8_t(* <a class="el" href="group__partition.html#g6a2b9c5359ec033470fc25b2626e56fc">device_read_t</a>)(uint32_t offset, uint8_t *buffer, uint16_t length)          </td>
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<p>
A function pointer used to read from the partition. 
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<dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>offset</em>&nbsp;</td><td>The offset on the device where to start reading. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>buffer</em>&nbsp;</td><td>The buffer into which to place the data. </td></tr>
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>length</em>&nbsp;</td><td>The count of bytes to read. </td></tr>
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<a class="anchor" name="gc6ca9cbb79b5099d610e976365ee2e8e"></a><!-- doxytag: member="partition.h::device_write_t" ref="gc6ca9cbb79b5099d610e976365ee2e8e" args=")(uint32_t offset, const uint8_t *buffer, uint16_t length)" --><p>
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          <td class="md" nowrap valign="top">typedef uint8_t(* <a class="el" href="group__partition.html#gc6ca9cbb79b5099d610e976365ee2e8e">device_write_t</a>)(uint32_t offset, const uint8_t *buffer, uint16_t length)          </td>
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<p>
A function pointer used to write from the partition. 
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<dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>offset</em>&nbsp;</td><td>The offset on the device where to start writing. </td></tr>
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>buffer</em>&nbsp;</td><td>The buffer which to write. </td></tr>
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>length</em>&nbsp;</td><td>The count of bytes to write. </td></tr>
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<hr><h2>Function Documentation</h2>
<a class="anchor" name="g128f4363de35c81a9ff8026d4db289d2"></a><!-- doxytag: member="partition.c::partition_close" ref="g128f4363de35c81a9ff8026d4db289d2" args="(struct partition_struct *partition)" --><p>
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          <td class="md" nowrap valign="top">uint8_t partition_close           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">struct <a class="el" href="structpartition__struct.html">partition_struct</a> *&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>partition</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
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<p>
Closes a partition. 
<p>
This function destroys a partition descriptor which was previously obtained from a call to <a class="el" href="group__partition.html#g8c424e51a89737b3544aa367cebffe55">partition_open()</a>. When this function returns, the given descriptor will be invalid.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>partition</em>&nbsp;</td><td>The partition descriptor to destroy. </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>0 on failure, 1 on success. </dd></dl>
<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="group__partition.html#g8c424e51a89737b3544aa367cebffe55">partition_open</a> </dd></dl>
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<a class="anchor" name="g8c424e51a89737b3544aa367cebffe55"></a><!-- doxytag: member="partition.c::partition_open" ref="g8c424e51a89737b3544aa367cebffe55" args="(device_read_t device_read, device_read_interval_t device_read_interval, device_write_t device_write, uint8_t index)" --><p>
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          <td class="md" nowrap valign="top">struct <a class="el" href="structpartition__struct.html">partition_struct</a> * partition_open           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="group__partition.html#g6a2b9c5359ec033470fc25b2626e56fc">device_read_t</a>&nbsp;</td>
          <td class="mdname" nowrap> <em>device_read</em>, </td>
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          <td class="md" nowrap><a class="el" href="group__partition.html#gebc277053a3361aaf4b67a486e24fa24">device_read_interval_t</a>&nbsp;</td>
          <td class="mdname" nowrap> <em>device_read_interval</em>, </td>
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          <td class="md" nowrap><a class="el" href="group__partition.html#gc6ca9cbb79b5099d610e976365ee2e8e">device_write_t</a>&nbsp;</td>
          <td class="mdname" nowrap> <em>device_write</em>, </td>
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          <td class="md" nowrap>uint8_t&nbsp;</td>
          <td class="mdname" nowrap> <em>index</em></td>
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          <td class="md">)&nbsp;</td>
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<p>
Opens a partition. 
<p>
Opens a partition by its index number and returns a partition handle which describes the opened partition.<p>
<dl compact><dt><b>Note:</b></dt><dd>This function does not support extended partitions.</dd></dl>
<dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>device_read</em>&nbsp;</td><td>A function pointer which is used to read from the disk. </td></tr>
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>device_read_interval</em>&nbsp;</td><td>A function pointer which is used to read in constant intervals from the disk. </td></tr>
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>device_write</em>&nbsp;</td><td>A function pointer which is used to write to the disk. </td></tr>
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>index</em>&nbsp;</td><td>The index of the partition which should be opened, range 0 to 3. </td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>0 on failure, a partition descriptor on success. </dd></dl>
<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="group__partition.html#g128f4363de35c81a9ff8026d4db289d2">partition_close</a> </dd></dl>
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