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href="../../../topics/sdk/burnsys/burner_offline_lite.html" id="id-d5856e1963-link">离线烧录</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="usb_display-d5856e2011" class="topicref" data-id="usb_display" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action usb_display-d5856e2011-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/app/usb-display.html" id="usb_display-d5856e2011-link">USB Display 方案</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d5856e2119" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d5856e2119-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/peripheral/peripheral-intro.html" id="id-d5856e2119-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-d5856e2244" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d5856e2244-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/bringup/chapter-bringup.html" id="id-d5856e2244-link">BringUp</a><div class="wh-tooltip"><p class="shortdesc">在硬件上电后快速初始化系统，为操作系统的启动准备好必要的硬件环境。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d5856e2345" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d5856e2345-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/chapter-advanced-app.html" id="id-d5856e2345-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 topic" role="article" aria-labelledby="ariaid-title1"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/ota/ota__sys_intro.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">OTA 系统结构</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;"></div><div class="- topic/body body"><div class="- topic/p p" data-ofbid="d284087e19__20250121171752"><span class="- topic/ph ph">Luban-Lite</span> OTA 使用 A/B 系统分区方式，在 Flash
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上保存前后两个版本的系统程序，并将每个版本保存在指定的分区中，通过环境变量指导升级和启动。<span class="- topic/ph ph">Luban-Lite</span> OTA
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系统方案组成结构如下所示：<ol class="- topic/ol ol arabic simple" id="id__ol_ccr_gfq_wcc" data-ofbid="id__ol_ccr_gfq_wcc"><li class="- topic/li li" data-ofbid="d284087e27__20250121171752">
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<p class="- topic/p p" data-ofbid="d284087e29__20250121171752">网络 OTA APP 程序升级</p>
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<p class="- topic/p p" data-ofbid="d284087e32__20250121171752">从服务器上下载 OTA 升级包，基于第三方库 <span class="+ topic/ph sw-d/filepath ph filepath">ota-downloader</span>
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实现，采用分片下载机制，下载一部分程序，给目标分区升级一部分程序。 不需要一次下载整个数据包，节省了存储空间。</p>
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</li><li class="- topic/li li" data-ofbid="d284087e38__20250121171752">
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<p class="- topic/p p" data-ofbid="d284087e40__20250121171752">从其他接口分包接收数据和升级</p>
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<p class="- topic/p p" data-ofbid="d284087e43__20250121171752">原理与网络 OTA 一致。 关于详细说明，可参考 <a class="- topic/xref xref" href="ota_programming.html">编程指南</a>。</p>
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<figure class="- topic/fig fig fignone" id="id__fig_frt_c1v_1dc" data-ofbid="id__fig_frt_c1v_1dc"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_ecr_gfq_wcc" src="../../../images/ota/ota.png" width="240" alt="ota"/></div><br/><figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 1</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">原理框图</span></figcaption></figure>
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