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<head> <head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta http-equiv="Content-Style-Type" content="text/css"> <meta http-equiv="Content-Style-Type" content="text/css">
<link rel="start" title="Site Top" href="../../">
<link rel="up" title="Freewares" href="../../fsw_e.html">
<link rel="alternate" hreflang="ja" title="Japanese version" href="00index_j.html"> <link rel="alternate" hreflang="ja" title="Japanese version" href="00index_j.html">
<link rel="stylesheet" href="css_e.css" type="text/css" media="screen" title="ELM Default"> <link rel="stylesheet" href="css_e.css" type="text/css" media="screen" title="ELM Default">
<title>ELM - FAT File System Module</title> <title>ELM - FAT File System Module</title>
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<div class="abst"> <div class="abst">
<img src="img/layers.png" class="rset" width="245" height="255" alt="layer"> <img src="img/layers.png" class="rset" width="245" height="255" alt="layer">
<p>FatFs is a generic file system module to implement the FAT file system to small embedded systems. The FatFs is written in compliance with ANSI C, therefore it is independent of hardware architecture. It can be incorporated into cheap microcontrollers, such as 8051, PIC, AVR, SH, Z80, H8, ARM and etc..., without any change.</p> <p>FatFs is a generic FAT file system module for small embedded systems. The FatFs is written in compliance with ANSI C and completely separated from the disk I/O layer. Therefore it is independent of hardware architecture. It can be incorporated into cheap microcontrollers, such as 8051, PIC, AVR, SH, Z80, H8, ARM and etc..., without any change. Petit FatFs module is also available <a href="http://elm-chan.org/fsw/ff/00index_p.html">here</a>.</p>
<h4>Features</h4> <h4>Features</h4>
<ul> <ul>
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<li><a href="en/close.html">f_close</a> - Close a File</li> <li><a href="en/close.html">f_close</a> - Close a File</li>
<li><a href="en/read.html">f_read</a> - Read File</li> <li><a href="en/read.html">f_read</a> - Read File</li>
<li><a href="en/write.html">f_write</a> - Write File</li> <li><a href="en/write.html">f_write</a> - Write File</li>
<li><a href="en/lseek.html">f_lseek</a> - Move File R/W Pointer</li> <li><a href="en/lseek.html">f_lseek</a> - Move R/W Pointer, Expand File Size</li>
<li><a href="en/truncate.html">f_truncate</a> - Truncate File</li> <li><a href="en/truncate.html">f_truncate</a> - Truncate File Size</li>
<li><a href="en/sync.html">f_sync</a> - Flush Cached Data</li> <li><a href="en/sync.html">f_sync</a> - Flush Cached Data</li>
<li><a href="en/opendir.html">f_opendir</a> - Open a Directory</li> <li><a href="en/opendir.html">f_opendir</a> - Open a Directory</li>
<li><a href="en/readdir.html">f_readdir</a> - Read a Directory Item</li> <li><a href="en/readdir.html">f_readdir</a> - Read a Directory Item</li>
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<li><a href="en/rename.html">f_rename</a> - Rename/Move a File or Directory</li> <li><a href="en/rename.html">f_rename</a> - Rename/Move a File or Directory</li>
<li><a href="en/mkfs.html">f_mkfs</a> - Create a File System on the Drive</li> <li><a href="en/mkfs.html">f_mkfs</a> - Create a File System on the Drive</li>
<li><a href="en/forward.html">f_forward</a> - Forward file data to the stream directly</li> <li><a href="en/forward.html">f_forward</a> - Forward file data to the stream directly</li>
<li><a href="en/chdir.html">f_chdir</a> - Change current directory</li>
<li><a href="en/chdrive.html">f_chdrive</a> - Change current drive</li>
<li><a href="en/gets.html">f_gets</a> - Read a string</li> <li><a href="en/gets.html">f_gets</a> - Read a string</li>
<li><a href="en/putc.html">f_putc</a> - Write a character</li> <li><a href="en/putc.html">f_putc</a> - Write a character</li>
<li><a href="en/puts.html">f_puts</a> - Write a string</li> <li><a href="en/puts.html">f_puts</a> - Write a string</li>
<li><a href="en/printf.html">f_printf</a> - Write a formatted string</li> <li><a href="en/printf.html">f_printf</a> - Write a formatted string</li>
</ul> </ul>
</div> </div>
<div class="para"> <div class="para">
<h3>Disk I/O Interface</h3> <h3>Disk I/O Interface</h3>
<p>Since the FatFs module is completely separated from disk I/O layer, it requires following functions to lower layer to read/write physical disk and to get current time. The low level disk I/O module is not a part of FatFs module and it must be provided by user. The sample drivers are also available in the resources.</p> <p>Since the FatFs module is completely separated from disk I/O layer, it requires following functions to lower layer to read/write the physical disk and to get current time. The low level disk I/O module is not a part of FatFs module and it must be provided by user. The sample drivers are also available in the resources.</p>
<ul> <ul>
<li><a href="en/dinit.html">disk_initialize</a> - Initialize disk drive</li> <li><a href="en/dinit.html">disk_initialize</a> - Initialize disk drive</li>
<li><a href="en/dstat.html">disk_status</a> - Get disk status</li> <li><a href="en/dstat.html">disk_status</a> - Get disk status</li>
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<h3>Resources</h3> <h3>Resources</h3>
<p>The FatFs module is a free software and is opened for education, research and development. You can use, modify and/or republish it for personal, non-profit or commercial use without any restriction under your responsibility.</p> <p>The FatFs module is a free software and is opened for education, research and development. You can use, modify and/or republish it for personal, non-profit or commercial use without any restriction under your responsibility.</p>
<ul> <ul>
<li><a href="ff007a.zip">FatFs R0.07a</a> | <a href="updates.txt">Updates</a> | <a href="patches.txt">Patches</a> <span class="mfd">Apr 14, 2009</span></li> <li><a href="http://elm-chan.org/fsw/ff/bd/"><em>FatFs User Forum</em></a></li>
<li><a href="http://elm-chan.org/fsw/ff/bd/">FatFs User Forum</a></li> <li><a href="en/appnote.html">FatFs module application note</a> <span class="mfd">Jun 21, 2009</span></li>
<li><a href="en/appnote.html">FatFs module application note</a> <span class="mfd">Apr 14, 2009</span></li> <li><a href="http://www.siwawi.arubi.uni-kl.de/avr_projects/arm_projects/">ARM-Projects by Martin THOMAS</a> (examples for LPC2000, AT91SAM and STM32)</li>
<li><a href="http://www.siwawi.arubi.uni-kl.de/avr_projects/arm_projects/">ARM-Projects by Martin THOMAS</a> (examples for LPC2000 and AT91SAM)</li>
<li><a href="img/rwtest.png">Benchmark 1</a> (ATmega64/9.2MHz with MMC via SPI, HDD/CFC via GPIO)</li>
<li><a href="img/rwtest2.png">Benchmark 2</a> (LPC2368/72MHz with MMC via MCI)</li>
<li><a href="http://www.microsoft.com/whdc/system/platform/firmware/fatgen.mspx">FAT32 Specification by Microsoft</a> (The reference document on FAT file system)</li> <li><a href="http://www.microsoft.com/whdc/system/platform/firmware/fatgen.mspx">FAT32 Specification by Microsoft</a> (The reference document on FAT file system)</li>
<li><a href="http://elm-chan.org/docs/mmc/mmc_e.html">How to Use MMC/SDC</a></li> <li><a href="http://elm-chan.org/docs/mmc/mmc_e.html">How to Use MMC/SDC</a></li>
<li>Previous versions: <a href="ff007.zip">R0.07</a> | <a href="ff006.zip">R0.06</a> | <a href="ff001-005a.zip">Earlyer than R0.06</a></li> <li><a href="img/rwtest.png">Benchmark 1</a> (ATmega64/9.2MHz with MMC via SPI, HDD/CFC via GPIO)</li>
<li><a href="img/rwtest2.png">Benchmark 2</a> (LPC2368/72MHz with MMC via MCI)</li>
</ul> </ul>
</div> </div>