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href="../../../topics/sdk/advanced/gdb.html" id="id-d3752e913-link">GDB 调试</a></div></div></li><li role="treeitem"><div data-tocid="id-d3752e929" class="topicref" data-id="id" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/advanced/pinmux.html" id="id-d3752e929-link">引脚配置</a></div></div></li><li role="treeitem"><div data-tocid="id-d3752e945" class="topicref" data-id="id" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/advanced/driver.html" id="id-d3752e945-link">添加驱动</a></div></div></li><li role="treeitem"><div data-tocid="id-d3752e960" class="topicref" data-id="id" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/advanced/app.html" id="id-d3752e960-link">添加应用</a></div></div></li><li role="treeitem"><div data-tocid="id-d3752e974" class="topicref" data-id="id" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/advanced/hellowold.html" id="id-d3752e974-link">hellowold</a></div></div></li><li role="treeitem"><div data-tocid="id-d3752e988" class="topicref" data-id="id" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/advanced/burnin_test.html" id="id-d3752e988-link">烤机测试</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_rcx_czh_pzb-d3752e1004" class="topicref" data-id="concept_rcx_czh_pzb" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_rcx_czh_pzb-d3752e1004-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/chapter-app.html" id="concept_rcx_czh_pzb-d3752e1004-link">应用场景</a><div class="wh-tooltip"><p class="shortdesc">描述了 SDK 在不同应用场景中的配置和使用，包括系统更新、OTA、安全方案等。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d3752e1848" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d3752e1848-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/peripheral/peripheral-intro.html" id="id-d3752e1848-link">外设移植</a><div class="wh-tooltip"><p class="shortdesc"><span class="ph">CTP、U 盘、SD 卡、有线和无线网络</span>等外设的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d3752e2022" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d3752e2022-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/bringup/chapter-bringup.html" id="id-d3752e2022-link">BringUp</a><div class="wh-tooltip"><p class="shortdesc">主要描述板卡的各项配置，使 SDK 的环境和板卡匹配，并确保 SDK 编译后的固件能够在板子上正常运行。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d3752e2418" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d3752e2418-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/chapter-advanced-app.html" id="id-d3752e2418-link">高级应用</a><div class="wh-tooltip"><p class="shortdesc">系统、存储、多媒体、接口、安全等模块的详细配置和设计说明。</p></div></div></div></li></ul></div>
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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1">
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<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://aicdocco/taskstopics/sdk/advanced/partition-and-storage-relations.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">分区与存储设备的关系</h1>
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<div class="date inPage">16 May 2025</div><div style="color: gray;">
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Read time: 2 minute(s)
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<div class="- topic/body concept/conbody body conbody"><p class="- topic/shortdesc shortdesc"></p>
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<p class="- topic/p p" data-ofbid="d143499e30__20250519091520"><span class="- topic/ph ph">Luban-Lite</span> 上使用 RT-Thread
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时，每个分区都对应一个或者多个系统设备。不同存储介质的对应关系如下表格所示。系统中出现但此处未列出的其它分区，同样遵循下列规则。</p>
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<div class="table-container"><table class="- topic/table table longtable colwidths-given docutils align-default frame-all" id="partition-and-storage-relations__id10" data-ofbid="partition-and-storage-relations__id10" data-cols="5"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 1</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">SPI NOR 上的分区、设备和文件系统</span></caption><colgroup><col style="width:16.707920792079207%"/><col style="width:16.707920792079207%"/><col style="width:16.707920792079207%"/><col style="width:12.376237623762377%"/><col style="width:37.5%"/></colgroup><thead class="- topic/thead thead">
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<tr class="- topic/row">
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<th class="- topic/entry entry colsep-1 rowsep-1" id="partition-and-storage-relations__id10__entry__1">
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<p class="- topic/p p" data-ofbid="d143499e59__20250519091520">分区名</p>
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</th>
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<th class="- topic/entry entry colsep-1 rowsep-1" id="partition-and-storage-relations__id10__entry__2">
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<p class="- topic/p p" data-ofbid="d143499e65__20250519091520">MTD 设备名</p>
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</th>
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<th class="- topic/entry entry colsep-1 rowsep-1" id="partition-and-storage-relations__id10__entry__3">
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<p class="- topic/p p" data-ofbid="d143499e71__20250519091520">块设备名</p>
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</th>
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<th class="- topic/entry entry colsep-1 rowsep-1" id="partition-and-storage-relations__id10__entry__4">
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<p class="- topic/p p" data-ofbid="d143499e77__20250519091520">文件系统</p>
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</th>
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<th class="- topic/entry entry colsep-0 rowsep-1" id="partition-and-storage-relations__id10__entry__5">
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<p class="- topic/p p" data-ofbid="d143499e83__20250519091520">备注</p>
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</th>
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</tr>
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</thead><tbody class="- topic/tbody tbody">
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<tr class="- topic/row">
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id10__entry__1">
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<p class="- topic/p p" data-ofbid="d143499e95__20250519091520">"spl" </p>
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</td>
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id10__entry__2">
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<p class="- topic/p p" data-ofbid="d143499e101__20250519091520">"spl" </p>
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</td>
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id10__entry__3">
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<p class="- topic/p p" data-ofbid="d143499e107__20250519091520">-</p>
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</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id10__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d143499e113__20250519091520">-</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="partition-and-storage-relations__id10__entry__5">
|
||
<p class="- topic/p p" data-ofbid="d143499e119__20250519091520">-</p>
|
||
</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id10__entry__1">
|
||
<p class="- topic/p p" data-ofbid="d143499e128__20250519091520">"os" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id10__entry__2">
|
||
<p class="- topic/p p" data-ofbid="d143499e134__20250519091520">"os" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id10__entry__3">
|
||
<p class="- topic/p p" data-ofbid="d143499e140__20250519091520">-</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id10__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d143499e146__20250519091520">-</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="partition-and-storage-relations__id10__entry__5">
|
||
<p class="- topic/p p" data-ofbid="d143499e152__20250519091520">-</p>
|
||
</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id10__entry__1">
|
||
<p class="- topic/p p" data-ofbid="d143499e161__20250519091520">"rodata" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id10__entry__2">
|
||
<p class="- topic/p p" data-ofbid="d143499e167__20250519091520">"rodata" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id10__entry__3">
|
||
<p class="- topic/p p" data-ofbid="d143499e173__20250519091520">"blk_rodata" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id10__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d143499e179__20250519091520">FATFS</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="partition-and-storage-relations__id10__entry__5">
|
||
<p class="- topic/p p" data-ofbid="d143499e185__20250519091520">FATFS 通过 "blk_rodata" 设备访问 Flash</p>
|
||
</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="partition-and-storage-relations__id10__entry__1">
|
||
<p class="- topic/p p" data-ofbid="d143499e194__20250519091520">"data" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="partition-and-storage-relations__id10__entry__2">
|
||
<p class="- topic/p p" data-ofbid="d143499e200__20250519091520">"data" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="partition-and-storage-relations__id10__entry__3">
|
||
<p class="- topic/p p" data-ofbid="d143499e206__20250519091520">-</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="partition-and-storage-relations__id10__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d143499e212__20250519091520">LittleFS</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="partition-and-storage-relations__id10__entry__5">
|
||
<p class="- topic/p p" data-ofbid="d143499e218__20250519091520">LittleFS 直接通过 MTD 设备访问 Flash</p>
|
||
</td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<ul class="- topic/ul ul" id="partition-and-storage-relations__ul_xbz_pjy_5cc" data-ofbid="partition-and-storage-relations__ul_xbz_pjy_5cc">
|
||
<li class="- topic/li li" data-ofbid="d143499e228__20250519091520">分区名：<ul class="- topic/ul ul" id="partition-and-storage-relations__ul_ocj_zjy_5cc" data-ofbid="partition-and-storage-relations__ul_ocj_zjy_5cc">
|
||
<li class="- topic/li li" data-ofbid="d143499e232__20250519091520">"spl"：分区及其设备名，"spl" 分区主要用于存储二次引导加载程序，是系统启动的第一个阶段所加载的程序。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e235__20250519091520">"os"："os" 分区，存放操作系统的主要部分，是系统运行的核心区域。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e238__20250519091520">"rodata"："rodata" 分区，主要用于存储只读数据，包括系统在运行时需要读取但不修改的配置信息等。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e241__20250519091520">"data"："data" 分区，用来存储可变数据，如用户生成的数据或系统运行时产生的临时数据。</li>
|
||
</ul></li>
|
||
<li class="- topic/li li" data-ofbid="d143499e245__20250519091520">MTD 设备名：对 Flash 的底层直接访问，便于进行读写硬件等操作。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e248__20250519091520">块设备名：通过将物理存储抽象为块设备，简化了对文件系统的操作。仅 "rodata" 分区关联了一个块设备名 "blk_rodata"。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e251__20250519091520">文件系统："rodata" 分区使用 FATFS 文件系统，使得数据以文件的形式进行存储和管理。"data" 分区使用 LittleFS 文件系统。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e254__20250519091520">访问规则：<ul class="- topic/ul ul" id="partition-and-storage-relations__ul_bst_25n_hdc" data-ofbid="partition-and-storage-relations__ul_bst_25n_hdc">
|
||
<li class="- topic/li li" data-ofbid="d143499e258__20250519091520">
|
||
<p class="- topic/p p" data-ofbid="d143499e260__20250519091520">直接访问 Flash，使用 MTD 设备</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e264__20250519091520">
|
||
<p class="- topic/p p" data-ofbid="d143499e266__20250519091520">FATFS 访问 Flash，需要使用块设备</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e270__20250519091520">
|
||
<p class="- topic/p p" data-ofbid="d143499e272__20250519091520">LittleFS 访问 Flash，使用 MTD 设备</p>
|
||
</li>
|
||
</ul></li>
|
||
</ul>
|
||
<div class="table-container"><table class="- topic/table table longtable colwidths-given docutils align-default frame-all" id="partition-and-storage-relations__id11" data-ofbid="partition-and-storage-relations__id11" data-cols="5"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 2</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">SPI NAND 上的分区、设备和文件系统</span></caption><colgroup><col style="width:11.014176663031625%"/><col style="width:14.394765539803709%"/><col style="width:14.067611777535442%"/><col style="width:10.905125408942203%"/><col style="width:49.61832061068702%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="partition-and-storage-relations__id11__entry__1">
|
||
<p class="- topic/p p" data-ofbid="d143499e302__20250519091520">分区名字</p>
|
||
</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="partition-and-storage-relations__id11__entry__2">
|
||
<p class="- topic/p p" data-ofbid="d143499e308__20250519091520">MTD 设备名</p>
|
||
</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="partition-and-storage-relations__id11__entry__3">
|
||
<p class="- topic/p p" data-ofbid="d143499e314__20250519091520">块设备名</p>
|
||
</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="partition-and-storage-relations__id11__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d143499e320__20250519091520">文件系统</p>
|
||
</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="partition-and-storage-relations__id11__entry__5">
|
||
<p class="- topic/p p" data-ofbid="d143499e326__20250519091520">备注</p>
|
||
</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id11__entry__1">
|
||
<p class="- topic/p p" data-ofbid="d143499e338__20250519091520">"spl" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id11__entry__2">
|
||
<p class="- topic/p p" data-ofbid="d143499e344__20250519091520">"spl" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id11__entry__3">
|
||
<p class="- topic/p p" data-ofbid="d143499e350__20250519091520">-</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id11__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d143499e356__20250519091520">-</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="partition-and-storage-relations__id11__entry__5">
|
||
<p class="- topic/p p" data-ofbid="d143499e362__20250519091520">-</p>
|
||
</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id11__entry__1">
|
||
<p class="- topic/p p" data-ofbid="d143499e371__20250519091520">"os" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id11__entry__2">
|
||
<p class="- topic/p p" data-ofbid="d143499e377__20250519091520">"os" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id11__entry__3">
|
||
<p class="- topic/p p" data-ofbid="d143499e383__20250519091520">-</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id11__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d143499e389__20250519091520">-</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="partition-and-storage-relations__id11__entry__5">
|
||
<p class="- topic/p p" data-ofbid="d143499e395__20250519091520">-</p>
|
||
</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id11__entry__1">
|
||
<p class="- topic/p p" data-ofbid="d143499e404__20250519091520">"rodata" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id11__entry__2">
|
||
<p class="- topic/p p" data-ofbid="d143499e410__20250519091520">"rodata" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id11__entry__3">
|
||
<p class="- topic/p p" data-ofbid="d143499e416__20250519091520">"blk_rodata" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id11__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d143499e422__20250519091520">FATFS</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="partition-and-storage-relations__id11__entry__5">
|
||
<p class="- topic/p p" data-ofbid="d143499e428__20250519091520">通过 "blk_rodata" 设备访问 Flash，FATFS 只读</p>
|
||
</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="partition-and-storage-relations__id11__entry__1">
|
||
<p class="- topic/p p" data-ofbid="d143499e437__20250519091520">"data" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="partition-and-storage-relations__id11__entry__2">
|
||
<p class="- topic/p p" data-ofbid="d143499e443__20250519091520">"data" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="partition-and-storage-relations__id11__entry__3">
|
||
<p class="- topic/p p" data-ofbid="d143499e449__20250519091520">"blk_data" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="partition-and-storage-relations__id11__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d143499e455__20250519091520">FATFS</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="partition-and-storage-relations__id11__entry__5">
|
||
<p class="- topic/p p" data-ofbid="d143499e461__20250519091520">"blk_data"设备是通过 NFTL 层创建，</p>
|
||
<p class="- topic/p p" data-ofbid="d143499e464__20250519091520">FATFS 访问 "blk_data" 时，通过 NFTL 访问 Flash。</p>
|
||
</td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<ul class="- topic/ul ul" id="partition-and-storage-relations__ul_s5j_3nq_gdc" data-ofbid="partition-and-storage-relations__ul_s5j_3nq_gdc">
|
||
<li class="- topic/li li" data-ofbid="d143499e474__20250519091520">分区名：<ul class="- topic/ul ul" id="partition-and-storage-relations__ul_wlb_5ky_5cc" data-ofbid="partition-and-storage-relations__ul_wlb_5ky_5cc">
|
||
<li class="- topic/li li" data-ofbid="d143499e478__20250519091520">"spl"：分区及其设备名，"spl" 分区主要用于存储 二次引导加载程序，是系统启动的第一个阶段所加载的程序。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e481__20250519091520">"os"："os" 分区，存放操作系统的主要部分，是系统运行的核心区域。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e484__20250519091520">"rodata"："rodata" 分区，主要用于存储只读数据，包括系统在运行时需要读取但不修改的配置信息等。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e487__20250519091520">"data"："data" 分区，用来存储可变数据，如用户生成的数据或系统运行时产生的临时数据。</li>
|
||
</ul></li>
|
||
<li class="- topic/li li" data-ofbid="d143499e491__20250519091520">MTD 设备名：对 Flash 的底层直接访问，便于进行读写硬件等操作。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e494__20250519091520">块设备名：通过将物理存储抽象为块设备，简化了对文件系统的操作。"blk_rodata" 和 "blk_data" 分别支持对 "rodata" 和 "data"
|
||
分区的文件系统访问。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e497__20250519091520">文件系统："rodata" 分区使用 FATFS 文件系统，使得数据以文件的形式进行存储和管理。"data" 分区使用 FATFS 文件系统。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e500__20250519091520">NFTL 层：网络闪存转换层，主要用来将 Flash 的物理特性映射为一般块设备，便于 FATFS 等文件系统无需关心底层 NAND Flash 的具体特性。<div class="- topic/note note note note_note" id="partition-and-storage-relations__note_dr3_4mq_gdc" data-ofbid="partition-and-storage-relations__note_dr3_4mq_gdc"><span class="note__title">注：</span>
|
||
<p class="- topic/p p" data-ofbid="d143499e504__20250519091520">建议只设置一个使用 NFTL 的分区，并且分区不要太小。因为 NFTL 需要预留至少 6 MB 空间做坏块管理。</p>
|
||
</div></li>
|
||
<li class="- topic/li li" data-ofbid="d143499e509__20250519091520">访问规则：<ul class="- topic/ul ul" id="partition-and-storage-relations__ul_oxj_f5n_hdc" data-ofbid="partition-and-storage-relations__ul_oxj_f5n_hdc">
|
||
<li class="- topic/li li" data-ofbid="d143499e513__20250519091520">
|
||
<p class="- topic/p p" data-ofbid="d143499e515__20250519091520">直接访问 Flash，使用 MTD 设备</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e519__20250519091520">
|
||
<p class="- topic/p p" data-ofbid="d143499e521__20250519091520">FATFS 访问 Flash，需要使用块设备，通过 NFTL 层访问 Flash</p>
|
||
</li>
|
||
</ul></li>
|
||
</ul>
|
||
<div class="table-container"><table class="- topic/table table longtable colwidths-given docutils align-default frame-all" id="partition-and-storage-relations__id12" data-ofbid="partition-and-storage-relations__id12" data-cols="5"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 3</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">eMMC 上的分区、设备和文件系统</span></caption><colgroup><col style="width:16.770186335403725%"/><col style="width:16.770186335403725%"/><col style="width:16.770186335403725%"/><col style="width:12.422360248447204%"/><col style="width:37.267080745341616%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="partition-and-storage-relations__id12__entry__1">
|
||
<p class="- topic/p p" data-ofbid="d143499e552__20250519091520">分区名字</p>
|
||
</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="partition-and-storage-relations__id12__entry__2">
|
||
<p class="- topic/p p" data-ofbid="d143499e558__20250519091520">MTD 设备名</p>
|
||
</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="partition-and-storage-relations__id12__entry__3">
|
||
<p class="- topic/p p" data-ofbid="d143499e564__20250519091520">块设备名</p>
|
||
</th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="partition-and-storage-relations__id12__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d143499e570__20250519091520">文件系统</p>
|
||
</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="partition-and-storage-relations__id12__entry__5">
|
||
<p class="- topic/p p" data-ofbid="d143499e576__20250519091520">备注</p>
|
||
</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id12__entry__1">
|
||
<p class="- topic/p p" data-ofbid="d143499e588__20250519091520">"spl" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id12__entry__2">
|
||
<p class="- topic/p p" data-ofbid="d143499e594__20250519091520">-</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id12__entry__3">
|
||
<p class="- topic/p p" data-ofbid="d143499e600__20250519091520"><code class="+ topic/ph pr-d/codeph ph codeph">mmc0p0</code>
|
||
</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id12__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d143499e608__20250519091520">-</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="partition-and-storage-relations__id12__entry__5">
|
||
<p class="- topic/p p" data-ofbid="d143499e614__20250519091520">-</p>
|
||
</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id12__entry__1">
|
||
<p class="- topic/p p" data-ofbid="d143499e623__20250519091520">"os" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id12__entry__2">
|
||
<p class="- topic/p p" data-ofbid="d143499e629__20250519091520">-</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id12__entry__3">
|
||
<p class="- topic/p p" data-ofbid="d143499e635__20250519091520"><code class="+ topic/ph pr-d/codeph ph codeph">mmc0p1</code>
|
||
</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id12__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d143499e643__20250519091520">-</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="partition-and-storage-relations__id12__entry__5">
|
||
<p class="- topic/p p" data-ofbid="d143499e649__20250519091520">-</p>
|
||
</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id12__entry__1">
|
||
<p class="- topic/p p" data-ofbid="d143499e658__20250519091520">"rodata" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id12__entry__2">
|
||
<p class="- topic/p p" data-ofbid="d143499e664__20250519091520">-</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id12__entry__3">
|
||
<p class="- topic/p p" data-ofbid="d143499e670__20250519091520"><code class="+ topic/ph pr-d/codeph ph codeph">mmc0p2</code>
|
||
</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="partition-and-storage-relations__id12__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d143499e678__20250519091520">FATFS</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="partition-and-storage-relations__id12__entry__5">
|
||
<p class="- topic/p p" data-ofbid="d143499e684__20250519091520">此处的分区排序仅为示例</p>
|
||
</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="partition-and-storage-relations__id12__entry__1">
|
||
<p class="- topic/p p" data-ofbid="d143499e693__20250519091520">"data" </p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="partition-and-storage-relations__id12__entry__2">
|
||
<p class="- topic/p p" data-ofbid="d143499e699__20250519091520">-</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="partition-and-storage-relations__id12__entry__3">
|
||
<p class="- topic/p p" data-ofbid="d143499e705__20250519091520"><code class="+ topic/ph pr-d/codeph ph codeph">mmc0p3</code>
|
||
</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="partition-and-storage-relations__id12__entry__4">
|
||
<p class="- topic/p p" data-ofbid="d143499e713__20250519091520">FATFS</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="partition-and-storage-relations__id12__entry__5">
|
||
<p class="- topic/p p" data-ofbid="d143499e719__20250519091520">此处的分区排序仅为示例</p>
|
||
</td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<ul class="- topic/ul ul" id="partition-and-storage-relations__ul_gtf_yly_5cc" data-ofbid="partition-and-storage-relations__ul_gtf_yly_5cc">
|
||
<li class="- topic/li li" data-ofbid="d143499e729__20250519091520"><strong class="+ topic/ph hi-d/b ph b">分区名</strong>：<ul class="- topic/ul ul" id="partition-and-storage-relations__ul_htf_yly_5cc" data-ofbid="partition-and-storage-relations__ul_htf_yly_5cc">
|
||
<li class="- topic/li li" data-ofbid="d143499e735__20250519091520">"spl"：分区及其设备名，"spl" 分区主要用于存储 二次引导加载程序，是系统启动的第一个阶段所加载的程序。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e738__20250519091520">"os"："os" 分区，存放操作系统的主要部分，是系统运行的核心区域。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e741__20250519091520">"rodata" ："rodata" 分区，主要用于存储只读数据，包括系统在运行时需要读取但不修改的配置信息等。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e744__20250519091520">"data"："data" 分区，用来存储可变数据，如用户生成的数据或系统运行时产生的临时数据。</li>
|
||
</ul></li>
|
||
<li class="- topic/li li" data-ofbid="d143499e748__20250519091520">MTD 设备名：对 Flash 的底层直接访问，便于进行读写硬件等操作。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e751__20250519091520">块设备名：块设备按照分区顺序从 0 开始编号，例如从 mmc0p0 到 mmc0p3。每个块设备代表 eMMC
|
||
中的一个分区，简化了物理存储到逻辑存储的映射，便于后续的文件系统管理。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e754__20250519091520">文件系统："rodata" 和 "data" 分区均使用 FATFS 文件系统。</li>
|
||
<li class="- topic/li li" data-ofbid="d143499e757__20250519091520">访问规则：块设备的命名，按照分区的排序从 0 开始编号</li>
|
||
</ul>
|
||
</div>
|
||
</article></main></div>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
</div>
|
||
|
||
</div>
|
||
</div>
|
||
|
||
|
||
|
||
</div>
|
||
<footer class="navbar navbar-default wh_footer">
|
||
<div class=" footer-container mx-auto ">
|
||
<title>footer def</title>
|
||
<style>
|
||
.p1 {
|
||
font-family: FangZhengShuSong, Times, serif;
|
||
}
|
||
.p2 {
|
||
font-family: Arial, Helvetica, sans-serif;
|
||
}
|
||
.p3 {
|
||
font-family: "Lucida Console", "Courier New", monospace;
|
||
}
|
||
</style>
|
||
<div class="webhelp.fragment.footer">
|
||
<p class="p1">Copyright © 2019-2025 广东匠芯创科技有限公司. All rights reserved.</p>
|
||
</div>
|
||
<div>
|
||
<div class="generation_time">
|
||
Update Time: 2025-05-19
|
||
</div>
|
||
</div>
|
||
|
||
</div>
|
||
</footer>
|
||
|
||
<div id="go2top" class="d-print-none">
|
||
<span class="oxy-icon oxy-icon-up"></span>
|
||
</div>
|
||
|
||
<div id="modal_img_large" class="modal">
|
||
<span class="close oxy-icon oxy-icon-remove"></span>
|
||
<div id="modal_img_container"></div>
|
||
<div id="caption"></div>
|
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</div>
|
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|
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|
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<script src="${pd}/publishing/publishing-styles-AIC-template/js/custom.js" defer="defer"></script>
|
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|
||
|
||
</body>
|
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</html> |