group__fat16.html

采用fat格式对sd卡进行操作

          <td class="paramname"> <em>hour</em>, </td>
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          <td class="paramtype">uint8_t *&nbsp;</td>
          <td class="paramname"> <em>min</em>, </td>
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          <td class="paramtype">uint8_t *&nbsp;</td>
          <td class="paramname"> <em>sec</em></td><td>&nbsp;</td>
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<p>
Returns the modification time of a file. 
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<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>dir_entry</em>&nbsp;</td><td>The directory entry of which to return the modification time. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>hour</em>&nbsp;</td><td>The hour the file was last modified. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>min</em>&nbsp;</td><td>The min the file was last modified. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>sec</em>&nbsp;</td><td>The sec the file was last modified. </td></tr>
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<a class="anchor" name="g2f8ff07cca44ecb6770b12a58b6cd8c7"></a><!-- doxytag: member="fat16.h::fat16_get_fs_free" ref="g2f8ff07cca44ecb6770b12a58b6cd8c7" args="(const struct fat16_fs_struct *fs)" -->
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          <td class="memname">uint32_t fat16_get_fs_free           </td>
          <td>(</td>
          <td class="paramtype">const struct fat16_fs_struct *&nbsp;</td>
          <td class="paramname"> <em>fs</em>          </td>
          <td>&nbsp;)&nbsp;</td>
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<p>
Returns the amount of free storage capacity on the filesystem in bytes. 
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<dl class="note" compact><dt><b>Note:</b></dt><dd>As the FAT16 filesystem is cluster based, this function does not return continuous values but multiples of the cluster size.</dd></dl>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>fs</em>&nbsp;</td><td>The filesystem on which to operate. </td></tr>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on failure, the free filesystem space in bytes otherwise. </dd></dl>

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<a class="anchor" name="g8af3c3535929e19b0039e07f1976cec7"></a><!-- doxytag: member="fat16.h::fat16_get_fs_size" ref="g8af3c3535929e19b0039e07f1976cec7" args="(const struct fat16_fs_struct *fs)" -->
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          <td class="memname">uint32_t fat16_get_fs_size           </td>
          <td>(</td>
          <td class="paramtype">const struct fat16_fs_struct *&nbsp;</td>
          <td class="paramname"> <em>fs</em>          </td>
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<p>
Returns the amount of total storage capacity of the filesystem in bytes. 
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<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>fs</em>&nbsp;</td><td>The filesystem on which to operate. </td></tr>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on failure, the filesystem size in bytes otherwise. </dd></dl>

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<a class="anchor" name="gc176ec2f1bfa8c81972ea741a941e579"></a><!-- doxytag: member="fat16.h::fat16_open" ref="gc176ec2f1bfa8c81972ea741a941e579" args="(struct partition_struct *partition)" -->
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          <td class="memname">struct fat16_fs_struct* fat16_open           </td>
          <td>(</td>
          <td class="paramtype">struct <a class="el" href="structpartition__struct.html">partition_struct</a> *&nbsp;</td>
          <td class="paramname"> <em>partition</em>          </td>
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<p>
Opens a FAT16 filesystem. 
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<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>partition</em>&nbsp;</td><td>Discriptor of partition on which the filesystem resides. </td></tr>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>0 on error, a FAT16 filesystem descriptor on success. </dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="group__fat16.html#gc176ec2f1bfa8c81972ea741a941e579" title="Opens a FAT16 filesystem.">fat16_open</a> </dd></dl>

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<a class="anchor" name="g9704120fef030632a76d91cfbbef78b0"></a><!-- doxytag: member="fat16.h::fat16_open_dir" ref="g9704120fef030632a76d91cfbbef78b0" args="(struct fat16_fs_struct *fs, const struct fat16_dir_entry_struct *dir_entry)" -->
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          <td class="memname">struct fat16_dir_struct* fat16_open_dir           </td>
          <td>(</td>
          <td class="paramtype">struct fat16_fs_struct *&nbsp;</td>
          <td class="paramname"> <em>fs</em>, </td>
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          <td></td>
          <td class="paramtype">const struct <a class="el" href="structfat16__dir__entry__struct.html">fat16_dir_entry_struct</a> *&nbsp;</td>
          <td class="paramname"> <em>dir_entry</em></td><td>&nbsp;</td>
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<p>
Opens a directory. 
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<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>fs</em>&nbsp;</td><td>The filesystem on which the directory to open resides. </td></tr>
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>dir_entry</em>&nbsp;</td><td>The directory entry which stands for the directory to open. </td></tr>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>An opaque directory descriptor on success, 0 on failure. </dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="group__fat16.html#g95f491a5a0b6438781aefaedc250e926" title="Closes a directory descriptor.">fat16_close_dir</a> </dd></dl>

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<a class="anchor" name="g3a43c9943251749978645ad8e3f16757"></a><!-- doxytag: member="fat16.h::fat16_open_file" ref="g3a43c9943251749978645ad8e3f16757" args="(struct fat16_fs_struct *fs, const struct fat16_dir_entry_struct *dir_entry)" -->
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          <td class="memname">struct fat16_file_struct* fat16_open_file           </td>
          <td>(</td>
          <td class="paramtype">struct fat16_fs_struct *&nbsp;</td>
          <td class="paramname"> <em>fs</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const struct <a class="el" href="structfat16__dir__entry__struct.html">fat16_dir_entry_struct</a> *&nbsp;</td>
          <td class="paramname"> <em>dir_entry</em></td><td>&nbsp;</td>
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<p>
Opens a file on a FAT16 filesystem. 
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>fs</em>&nbsp;</td><td>The filesystem on which the file to open lies. </td></tr>
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>dir_entry</em>&nbsp;</td><td>The directory entry of the file to open. </td></tr>
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<dl class="return" compact><dt><b>Returns:</b></dt><dd>The file handle, or 0 on failure. </dd></dl>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="group__fat16.html#g2b2812041f489bc7913bfa5cbcf0172b" title="Closes a file.">fat16_close_file</a> </dd></dl>

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<a class="anchor" name="g73c8f0598e8224736b09644c48cf2970"></a><!-- doxytag: member="fat16.h::fat16_read_dir" ref="g73c8f0598e8224736b09644c48cf2970" args="(struct fat16_dir_struct *dd, struct fat16_dir_entry_struct *dir_entry)" -->
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          <td class="memname">uint8_t fat16_read_dir           </td>
          <td>(</td>
          <td class="paramtype">struct fat16_dir_struct *&nbsp;</td>
          <td class="paramname"> <em>dd</em>, </td>
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          <td></td>
          <td class="paramtype">struct <a class="el" href="structfat16__dir__entry__struct.html">fat16_dir_entry_struct</a> *&nbsp;</td>
          <td class="paramname"> <em>dir_entry</em></td><td>&nbsp;</td>
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<p>
Reads the next directory entry contained within a parent directory. 
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<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"><tt>[in]</tt>&nbsp;</td><td valign="top"><em>dd</em>&nbsp;</td><td>The descriptor of the parent directory from which to read the entry. </td></tr>
    <tr><td valign="top"><tt>[out]</tt>&nbsp;</td><td valign="top"><em>dir_entry</em>&nbsp;</td><td>Pointer to a buffer into which to write the directory entry information. </td></tr>