savelij13
46155916b1
- Added a memory configuration option. (_USE_LFN) - Added file lock feature. (_FS_SHARE) - Added fast seek feature. (_USE_FASTSEEK) - Changed some types on the API, XCHAR->TCHAR. - Changed fname member in the FILINFO structure on Unicode cfg. - String functions support UTF-8 encoding files on Unicode cfg.
69 lines
2.8 KiB
HTML
69 lines
2.8 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
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<html lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<meta http-equiv="Content-Style-Type" content="text/css">
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<link rel="up" title="FatFs" href="../00index_e.html">
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<link rel="alternate" hreflang="ja" title="Japanese" href="../ja/dioctl.html">
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<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default">
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<title>FatFs - disk_ioctl</title>
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</head>
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<body>
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<div class="para">
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<h2>disk_ioctl</h2>
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<p>The disk_ioctl function cntrols device specified features and miscellaneous functions other than disk read/write.</p>
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<pre>
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DRESULT disk_ioctl (
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BYTE <em>Drive</em>, <span>/* Drive number */</span>
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BYTE <em>Command</em>, <span>/* Control command code */</span>
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void* <em>Buffer</em> <span>/* Parameter and data buffer */</span>
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);
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</pre>
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</div>
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<div class="para">
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<h4>Parameters</h4>
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<dl class="par">
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<dt>Drive</dt>
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<dd>Specifies the drive number (0-9).</dd>
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<dt>Command</dt>
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<dd>Specifies the command code.</dd>
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<dt>Buffer</dt>
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<dd>Pointer to the parameter buffer depends on the command code. When it is not used, specify a NULL pointer.</dd>
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</dl>
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</div>
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<div class="para">
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<h4>Return Value</h4>
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<dl class="ret">
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<dt>RES_OK (0)</dt>
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<dd>The function succeeded.</dd>
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<dt>RES_ERROR</dt>
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<dd>Any error occured.</dd>
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<dt>RES_PARERR</dt>
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<dd>Invalid command code.</dd>
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<dt>RES_NOTRDY</dt>
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<dd>The disk drive has not been initialized.</dd>
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</dl>
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</div>
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<div class="para">
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<h4>Description</h4>
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<p>The FatFs module uses only device independent commands described below. Any device dependent function is not used.</p>
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<table class="lst">
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<tr><th>Command</th><th>Description</th></tr>
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<tr><td>CTRL_SYNC</td><td>Make sure that the disk drive has finished pending write process. When the disk I/O module has a write back cache, flush the dirty sector immediately. This command is not required in read-only configuration.</td></tr>
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<tr><td>GET_SECTOR_SIZE</td><td>Returns sector size of the drive into the WORD variable pointed by <tt>Buffer</tt>. This command is not required in single sector size configuration, _MAX_SS is 512.</td></tr>
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<tr><td>GET_SECTOR_COUNT</td><td>Returns total sectors on the drive into the DWORD variable pointed by <tt>Buffer</tt>. This command is used by only f_mkfs function to determine the volume size to be created.</td></tr>
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<tr><td>GET_BLOCK_SIZE</td><td>Returns erase block size of the flash memory in unit of sector into the DWORD variable pointed by <tt>Buffer</tt>. This command is used by only f_mkfs function and it attempts to align data area to the erase block boundary. The allowable value is 1 to 32768 in power of 2. Return 1 if the erase block size is unknown or disk devices.</td></tr>
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</table>
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</div>
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<p class="foot"><a href="../00index_e.html">Return</a></p>
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</body>
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</html>
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