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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_emmc_config_guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">eMMC OTA 参数配置</h1><div class="date inPage">11 Dec 2024</div><div style="color: gray;">
Read time: 8 minute(s)
</div><div class="- topic/body body"><div class="- topic/p p" data-ofbid="d96062e17__20250121171535">eMMC OTA 主要涉及以下参数配置，以 <code class="+ topic/ph pr-d/codeph ph codeph">d211_demo</code> 的配置流程为例：<ul class="- topic/ul ul" id="id__ul_mpk_d24_hdc" data-ofbid="id__ul_mpk_d24_hdc"><li class="- topic/li li" data-ofbid="d96062e23__20250121171535">
<div class="- topic/p p" data-ofbid="d96062e25__20250121171535"><a class="- topic/xref xref" href="ota_emmc_config_guide.html#id__section_kns_zg4_hdc">主系统</a>：配置文件
<span class="+ topic/ph sw-d/filepath ph filepath">d211_demo_defconfig</span>。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_kmq_nqw_fdc" data-ofbid="id__codeblock_kmq_nqw_fdc"><span class="hl-number">1.</span> target/d211/demo/image_cfg.json <em class="hl-comment">//分区配置和烧录</em>
<span class="hl-number">2.</span> target/d211/common/env.txt <em class="hl-comment">//U-Boot 环境变量</em>
<span class="hl-number">3.</span> target/d211/demo/rootfs_overlay/etc/fw_env.config <em class="hl-comment">//环境变量分区信息</em>
<span class="hl-number">4.</span> target/d211/demo/rootfs_overlay/etc/swupdate_main <em class="hl-comment">//挂载 OTA 本地升级文件系统</em>
<span class="hl-number">5.</span> target/d211/demo/swupdate/sw-description <em class="hl-comment">//OTA 策略描述文件</em>
<span class="hl-number">6.</span> target/d211/demo/swupdate/sw-images.cfg <em class="hl-comment">//打包相应文件到 OTA 升级包中</em>
<span class="hl-number">7.</span> target/configs/d211_demo_defconfig <em class="hl-comment">//板级配置文件</em></pre></div>
</li><li class="- topic/li li" data-ofbid="d96062e36__20250121171535">
<div class="- topic/p p" data-ofbid="d96062e38__20250121171535"><a class="- topic/xref xref" href="ota_emmc_config_guide.html#id__section_qlk_1h4_hdc">Recovery
系统</a>：配置文件
<span class="+ topic/ph sw-d/filepath ph filepath">d211_ota_emmc_defconfig</span>。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_fsw_nqw_fdc" data-ofbid="id__codeblock_fsw_nqw_fdc"><span class="hl-number">1.</span> target/d211/ota_emmc/rootfs_overlay/etc/fw_env.config <em class="hl-comment">//环境变量分区信息</em>
<span class="hl-number">2.</span> target/d211/ota_emmc/rootfs_overlay/etc/init.d/S91swupdate_ota <em class="hl-comment">//开机自动挂载 OTA 分区与启动 OTA 升级程序</em>
<span class="hl-number">3.</span> target/configs/d211_ota_emmc_defconfig <em class="hl-comment">//OTA 配置文件</em></pre></div>
</li><li class="- topic/li li" data-ofbid="d96062e49__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e51__20250121171535">主系统与 Recovery 系统启动脚本文件
<span class="+ topic/ph sw-d/filepath ph filepath">package/third-party/swupdate/S90swupdate</span>，开机后台执行
SWUpdate 程序。</p>
</li></ul></div><section class="- topic/section section" id="id__section_qlk_1h4_hdc" data-ofbid="id__section_qlk_1h4_hdc"><h2 class="- topic/title title sectiontitle">Recovery 系统配置</h2>
<p class="- topic/p p" data-ofbid="d96062e62__20250121171535">为了简化使用，Recovery 系统的 OTA 相关配置已打开，用户无需手动开启。</p>
<ol class="- topic/ol ol" id="id__ol_zth_j24_hdc" data-ofbid="id__ol_zth_j24_hdc"><li class="- topic/li li" data-ofbid="d96062e66__20250121171535"><strong class="+ topic/ph hi-d/b ph b">配置 SWUpdate 包</strong>
<p class="- topic/p p" data-ofbid="d96062e70__20250121171535">Recovery 系统配置文件路径为
<span class="+ topic/ph sw-d/filepath ph filepath">target/configs/d211_ota_emmc_defconfig</span>。</p><ol class="- topic/ol ol" type="a" id="id__ol_eh4_z24_hdc" data-ofbid="id__ol_eh4_z24_hdc"><li class="- topic/li li" data-ofbid="d96062e76__20250121171535">执行下列命令进入 Recovery 系统 SDK
生产环境：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_n4j_j24_hdc" data-ofbid="id__pre_n4j_j24_hdc">lunch ota_emmc</pre></li><li class="- topic/li li" data-ofbid="d96062e80__20250121171535">
<div class="- topic/p p" data-ofbid="d96062e82__20250121171535">在 Luban SDK
根目录下，执行下列命令进入功能配置界面：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_brc_dzr_ldc" data-ofbid="id__codeblock_brc_dzr_ldc">make m</pre></div>
</li><li class="- topic/li li" data-ofbid="d96062e87__20250121171535">
<div class="- topic/p p" data-ofbid="d96062e89__20250121171535">在 Luban SDK
功能配置界面，按如下选择：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_p4j_j24_hdc" data-ofbid="id__pre_p4j_j24_hdc">Third-party packages ---&gt;
-*- libubootenv ---&gt;
-*- libconfig ---&gt;
-*- libcurl ---&gt;
[*] swupdate ---&gt;</pre></div>
</li></ol></li><li class="- topic/li li" data-ofbid="d96062e94__20250121171535"><strong class="+ topic/ph hi-d/b ph b">配置 RootFS 为 initramfs</strong>
<ol class="- topic/ol ol" type="a" id="id__ol_uzr_2f4_hdc" data-ofbid="id__ol_uzr_2f4_hdc"><li class="- topic/li li" data-ofbid="d96062e99__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e101__20250121171535">默认切换
<span class="+ topic/ph ui-d/uicontrol ph uicontrol">RootFS images</span> 为<span class="+ topic/ph ui-d/uicontrol ph uicontrol">initial RAM
filesystem (initramfs)</span>，执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">make m</span>
命令 。</p>
<div class="- topic/p p" data-ofbid="d96062e116__20250121171535">配置如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_jzm_j24_hdc" data-ofbid="id__pre_jzm_j24_hdc">Filesystem images ---&gt;
RootFS images ---&gt;
-*- cpio the root filesystem (<strong class="hl-keyword">for</strong> use as an initial RAM filesystem)
Compression method (gzip) ---&gt;
[*] initial RAM filesystem linked into linux kernel</pre></div>
</li><li class="- topic/li li" data-ofbid="d96062e121__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e123__20250121171535">默认将
initramfs 编译进 Kernel，执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">make km</span> 命令。</p>
<div class="- topic/p p" data-ofbid="d96062e132__20250121171535">配置如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_lzm_j24_hdc" data-ofbid="id__pre_lzm_j24_hdc">General setup ---&gt;
[*] Initial RAM filesystem and RAM disk (initramfs/initrd) support
[*] Support initial ramdisk/ramfs compressed using gzip</pre></div>
</li></ol></li><li class="- topic/li li" data-ofbid="d96062e137__20250121171535">
<div class="- topic/div div section" id="id__id1">
<strong class="+ topic/ph hi-d/b ph b">编译 Recovery 系统</strong>
<ol class="- topic/ol ol" type="a" id="id__ul_ct3_cg1_rdc" data-ofbid="id__ul_ct3_cg1_rdc"><li class="- topic/li li" data-ofbid="d96062e145__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e147__20250121171535">检查或配置完成后，执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">make m</span> 命令编译 Recovery 系统。</p>
</li><li class="- topic/li li" data-ofbid="d96062e153__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e155__20250121171535">编译完成后，将 <span class="+ topic/ph sw-d/filepath ph filepath">Recovery.gz</span> 从
<span class="+ topic/ph sw-d/filepath ph filepath">output/d211_ota_emmc/images</span> 目录拷贝到
<span class="+ topic/ph sw-d/filepath ph filepath">target/d211/common</span> 目录下。</p>
<div class="- topic/p p" data-ofbid="d96062e167__20250121171535">各板级文件编译时会打包 <span class="+ topic/ph sw-d/filepath ph filepath">Recovery.gz</span> 到最终的镜像文件中，从而烧录到
<code class="+ topic/ph pr-d/codeph ph codeph">recovery 分区</code> 中。<ul class="- topic/ul ul arabic simple" id="id__ol_rgr_j24_hdc" data-ofbid="id__ol_rgr_j24_hdc"><li class="- topic/li li" data-ofbid="d96062e176__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e178__20250121171535"><span class="+ topic/ph sw-d/filepath ph filepath">Recovery.gz</span>：Recovery 系统打包镜像文件，为
<code class="+ topic/ph pr-d/codeph ph codeph">d211 eMMC</code> 平台通用 Recovery 系统。</p>
</li><li class="- topic/li li" data-ofbid="d96062e186__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e188__20250121171535"><span class="+ topic/ph sw-d/filepath ph filepath">output/d211_ota_emmc/images</span>：存放生成的
<span class="+ topic/ph sw-d/filepath ph filepath">Recovery.gz</span> 文件。</p>
</li></ul></div>
</li></ol></div>
</li></ol>
</section><section class="- topic/section section" id="id__section_kns_zg4_hdc" data-ofbid="id__section_kns_zg4_hdc"><h2 class="- topic/title title sectiontitle">主系统配置</h2>
<ol class="- topic/ol ol" id="id__ol_omv_j24_hdc" data-ofbid="id__ol_omv_j24_hdc"><li class="- topic/li li" data-ofbid="d96062e205__20250121171535">
<div class="- topic/div div section" id="id__id3">
<strong class="+ topic/ph hi-d/b ph b">配置 SWUpdate 包参数</strong>
<div class="- topic/note note note note_note" id="id__note_rxq_zxr_ldc" data-ofbid="id__note_rxq_zxr_ldc"><span class="note__title">注：</span> 如果需要重新配置 SWUpdate 参数，必须先关掉 SWUpdate 预编译功能，修改的
SWUpdate 配置才能够生效。</div><ol class="- topic/ol ol" type="a" id="id__ol_jbw_m24_hdc" data-ofbid="id__ol_jbw_m24_hdc"><li class="- topic/li li" data-ofbid="d96062e215__20250121171535">
<div class="- topic/p p" data-ofbid="d96062e217__20250121171535">执行下列命令进入主系统 SDK
生产环境：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_yc1_k24_hdc" data-ofbid="id__pre_yc1_k24_hdc">lunch d211_demo</pre></div>
</li><li class="- topic/li li" data-ofbid="d96062e222__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e224__20250121171535">在 Luban SDK 根目录下执行下列命令，进入功能配置界面：</p>
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_zc1_k24_hdc" data-ofbid="id__pre_zc1_k24_hdc">make m</pre>
</li><li class="- topic/li li" data-ofbid="d96062e230__20250121171535">
<div class="- topic/p p" data-ofbid="d96062e232__20250121171535">在 Luban SDK
功能配置，按如下选择：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_ad1_k24_hdc" data-ofbid="id__pre_ad1_k24_hdc">Third-party packages ---&gt;
-*- libubootenv ---&gt;
-*- libconfig ---&gt;
-*- libcurl ---&gt;
[*] swupdate ---&gt;</pre></div>
</li><li class="- topic/li li" data-ofbid="d96062e237__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e239__20250121171535">查看并修改 SWUpdate 库相关配置。</p>
<p class="- topic/p p" data-ofbid="d96062e242__20250121171535">关于 SWUpdate 包的参数描述，可查看<a class="- topic/xref xref" href="ota_introduction_lb.html#id__table_bd1_k24_hdc">SWUpdate 包重要配置描述</a>。</p>
<div class="- topic/p p" data-ofbid="d96062e249__20250121171535">示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_zmj_nrw_fdc" data-ofbid="id__codeblock_zmj_nrw_fdc">[*] use prebuilt binary instead of building from source
(package/third-party/swupdate/luban_swupdate.config) swupdate configuration file
[*] swupdate webserver</pre></div>
<ol class="- topic/ol ol" type="i" id="id__ol_kyx_34t_hdc" data-ofbid="id__ol_kyx_34t_hdc"><li class="- topic/li li" data-ofbid="d96062e255__20250121171535">
<div class="- topic/p p" data-ofbid="d96062e257__20250121171535">取消勾选下列选项，关闭 SWUpdate
预编译功能：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_gcv_nrw_fdc" data-ofbid="id__codeblock_gcv_nrw_fdc">[ ] use prebuilt binary instead of building from source</pre></div>
</li><li class="- topic/li li" data-ofbid="d96062e262__20250121171535">
<div class="- topic/p p" data-ofbid="d96062e264__20250121171535">执行下列命令查看和修改 SWUpdate
相关配置：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_t5h_4rw_fdc" data-ofbid="id__codeblock_t5h_4rw_fdc">make swupdate-menuconfig</pre></div>
</li></ol>
</li></ol></div>
</li><li class="- topic/li li" data-ofbid="d96062e271__20250121171535">
<div class="- topic/div div section" id="id__id4">
<strong class="+ topic/ph hi-d/b ph b">增加 <code class="+ topic/ph pr-d/codeph ph codeph">recovery</code> 分区并烧录系统镜像程序</strong>
<div class="- topic/p p" data-ofbid="d96062e281__20250121171535">在 <span class="+ topic/ph sw-d/filepath ph filepath">image_cfg.json</span> 中：<ol class="- topic/ol ol" type="a" id="id__ol_hzp_ch1_rdc" data-ofbid="id__ol_hzp_ch1_rdc"><li class="- topic/li li" data-ofbid="d96062e287__20250121171535">
<div class="- topic/p p" data-ofbid="d96062e289__20250121171535">添加 <code class="+ topic/ph pr-d/codeph ph codeph">recovery</code>
分区：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_hg2_dh1_rdc" data-ofbid="id__codeblock_hg2_dh1_rdc"><span class="hl-string">"kernel"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"12m"</span> },
+ <span class="hl-string">"recovery"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"16m"</span> }, <em class="hl-comment">//在 kernel 分区后面增加 recovery 分区</em></pre></div>
</li><li class="- topic/li li" data-ofbid="d96062e297__20250121171535">
<div class="- topic/p p" data-ofbid="d96062e299__20250121171535">确保 <span class="+ topic/ph sw-d/filepath ph filepath">kernel.its</span> 和
<span class="+ topic/ph sw-d/filepath ph filepath">recovery.its</span>
文件存在并正确配置：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_dwr_prw_fdc" data-ofbid="id__codeblock_dwr_prw_fdc"><span class="hl-string">"kernel"</span>: {
<span class="hl-string">"file"</span>: <span class="hl-string">"kernel.itb"</span>,
<span class="hl-string">"attr"</span>: [<span class="hl-string">"mtd"</span>, <span class="hl-string">"required"</span>], <em class="hl-comment">//在 kernel 镜像烧录配置后面添加 recovery 镜像烧录配置</em>
<span class="hl-string">"part"</span>: [<span class="hl-string">"kernel"</span>]
},
+ <span class="hl-string">"recovery"</span>: {
+ <span class="hl-string">"file"</span>: <span class="hl-string">"recovery.itb"</span>, <em class="hl-comment">//将 recovery.itb 镜像文件烧录到 recovery 分区里面</em>
+ <span class="hl-string">"attr"</span>: [<span class="hl-string">"mtd"</span>, <span class="hl-string">"required"</span>],
+ <span class="hl-string">"part"</span>: [<span class="hl-string">"recovery"</span>]
+ },
<span class="hl-string">"kernel.itb"</span>: {
<span class="hl-string">"its"</span>: <span class="hl-string">"kernel.its"</span> <em class="hl-comment">//在 kernel 镜像生成方法后面增加 recovery 镜像生成方法</em>
},
+ <span class="hl-string">"recovery.itb"</span>: {
+ <span class="hl-string">"its"</span>: <span class="hl-string">"recovery.its"</span> <em class="hl-comment">//配置 recovery.itb 文件通过 recovery.its 指导编译完成</em>
+ },</pre></div>
</li><li class="- topic/li li" data-ofbid="d96062e310__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e312__20250121171535">在 <span class="+ topic/ph sw-d/filepath ph filepath">image</span> 目录中<strong class="+ topic/ph hi-d/b ph b">检查
<span class="+ topic/ph sw-d/filepath ph filepath">recovery.itb</span> 文件是否生成</strong>。</p>
<p class="- topic/p p" data-ofbid="d96062e324__20250121171535">通过升级信息判断 <span class="+ topic/ph sw-d/filepath ph filepath">recovery.itb</span> 是否烧录到 recovery
分区。</p>
</li></ol></div></div>
</li><li class="- topic/li li" data-ofbid="d96062e331__20250121171535">
<div class="- topic/div div section" id="id__ota-ota">
<strong class="+ topic/ph hi-d/b ph b">增加 OTA 分区并烧录 OTA 升级包</strong>，用于验证本地 OTA 使用。<p class="- topic/p p" data-ofbid="d96062e338__20250121171535">如使用网络 OTA 或 SD 卡
OTA，可略过此步。</p><ol class="- topic/ol ol" type="a" id="id__ol_qrq_pf4_hdc" data-ofbid="id__ol_qrq_pf4_hdc"><li class="- topic/li li" data-ofbid="d96062e341__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e343__20250121171535">在 <span class="+ topic/ph sw-d/filepath ph filepath">target/d211/demo/image_cfg.json</span> 文件中，增加 OTA
分区配置：</p>
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_msy_qrw_fdc" data-ofbid="id__codeblock_msy_qrw_fdc"><span class="hl-string">"partitions"</span>: { <em class="hl-comment">// Partition table apply to device</em>
<span class="hl-string">"rootfs"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"72m"</span> },
+ <span class="hl-string">"ota"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"96m"</span> },
},
<span class="hl-string">"rootfs"</span>: {
<span class="hl-string">"file"</span>: <span class="hl-string">"rootfs.ext4"</span>,
<span class="hl-string">"attr"</span>: [<span class="hl-string">"block"</span>, <span class="hl-string">"required"</span>],
<span class="hl-string">"part"</span>: [<span class="hl-string">"rootfs"</span>]
},
+ <span class="hl-string">"ota"</span>: {
+ <span class="hl-string">"file"</span>: <span class="hl-string">"ota.ext4"</span>,
+ <span class="hl-string">"attr"</span>: [<span class="hl-string">"block"</span>, <span class="hl-string">"required"</span>],
+ <span class="hl-string">"part"</span>: [<span class="hl-string">"ota"</span>]
+ },</pre>
</li><li class="- topic/li li" data-ofbid="d96062e352__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e354__20250121171535">将 OTA 升级包下载到 <code class="+ topic/ph pr-d/codeph ph codeph">ota 分区</code>，方便测试 OTA 本地升级功能。</p>
<p class="- topic/p p" data-ofbid="d96062e360__20250121171535">关于 <code class="+ topic/ph pr-d/codeph ph codeph">ota 分区</code>说明，可查看 <a class="- topic/xref xref" href="ota_introduction_lb.html#id__luban-ota">Luban OTA 方案介绍</a>。</p>
</li><li class="- topic/li li" data-ofbid="d96062e370__20250121171535">
<div class="- topic/p p" data-ofbid="d96062e372__20250121171535">执行下列命令进入主系统 SDK
生产环境：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_nhh_k24_hdc" data-ofbid="id__pre_nhh_k24_hdc">lunch d211_demo</pre></div>
</li><li class="- topic/li li" data-ofbid="d96062e377__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e379__20250121171535">在 Luban SDK 根目录下执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">make m</span> 命令。</p>
<div class="- topic/p p" data-ofbid="d96062e385__20250121171535">配置如下：
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_phh_k24_hdc" data-ofbid="id__pre_phh_k24_hdc">Filesystem images ---&gt;
[*] UserFS <span class="hl-number">1</span> ---&gt;
(ota) Name
FS Type (Ext4) ---&gt;
[*] generate sparse format filesystem
(<span class="hl-number">96</span>M) Size
(<span class="hl-number">0</span>) Number of inodes (leave at <span class="hl-number">0</span> <strong class="hl-keyword">for</strong> <strong class="hl-keyword">auto</strong> calculation)
(<span class="hl-number">5</span>) Reserved blocks percentage
(-O ^<span class="hl-number">64</span>bit) Additional mke2fs options
(target/$(LUBAN_CHIP_NAME)/$(LUBAN_BOARD_NAME)/ota) Overlay directory</pre></div>
</li><li class="- topic/li li" data-ofbid="d96062e392__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e394__20250121171535">将
<span class="+ topic/ph sw-d/filepath ph filepath">target/$(LUBAN_CHIP_NAME)/$(LUBAN_BOARD_NAME)/ota</span>
目录里的内容生成 <span class="+ topic/ph sw-d/filepath ph filepath">ota.ext4</span> 镜像文件，之后将整个文件烧录到
<code class="+ topic/ph pr-d/codeph ph codeph">ota </code> 分区中。</p>
</li></ol></div>
</li></ol>
</section><section class="- topic/section section" id="id__u-boot" data-ofbid="id__u-boot"><h2 class="- topic/title title sectiontitle">U-Boot 环境变量配置</h2>
<p class="- topic/p p" data-ofbid="d96062e413__20250121171535">为了简化使用，U-Boot 环境变量的 OTA 相关配置已添加和开启，无需用户手动配置。</p>
<div class="- topic/p p" data-ofbid="d96062e416__20250121171535">通过环境变量 <code class="+ topic/ph pr-d/codeph ph codeph">boot_partition</code> 确定从 <code class="+ topic/ph pr-d/codeph ph codeph">kernel 分区</code>还是
<code class="+ topic/ph pr-d/codeph ph codeph">recovery 分区</code>引导启动。<ol class="- topic/ol ol" id="id__ul_pwn_vf4_hdc" data-ofbid="id__ul_pwn_vf4_hdc"><li class="- topic/li li" data-ofbid="d96062e428__20250121171535">
<div class="- topic/p p" data-ofbid="d96062e430__20250121171535">修改 <span class="+ topic/ph sw-d/filepath ph filepath"><var class="+ topic/keyword sw-d/varname keyword varname">project
directory</var>/common/env.txt</span> 文件中的相关参数，以
<span class="+ topic/ph sw-d/filepath ph filepath">d211/common/env.txt</span>
为例：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_esv_vf4_hdc" data-ofbid="id__pre_esv_vf4_hdc">+ set_commonargs_recovery=setenv bootargs earlycon=${earlycon} earlyprintk console=${console} rdinit=/linuxrc
+ <em class="hl-comment">//从 Recovery 系统启动, 引导 initramfs 启动</em>
+ set_mmc_bootargs_recovery=run set_commonargs_recovery; \ <em class="hl-comment">//设置环境变量 set_mmc_bootargs_recovery</em>
run set_mmc_root; \
setenv bootargs <span class="hl-string">"${bootargs}"</span>;
+ boot_partition=kernel <em class="hl-comment">//初始化环境变量 boot_partition 从 kernel 分区启动</em>
+ run set_mmc_bootargs_recovery; \
+ loadknl mmc ${boot_devnum} recovery ${knl_addr}; \
+ bootm ${knl_addr}; <em class="hl-comment">//mmc_boot 环境变量增加从 recovery 分区引导启动</em></pre></div>
<p class="- topic/p p" data-ofbid="d96062e443__20250121171535">手动配置环境变量 <code class="+ topic/ph pr-d/codeph ph codeph">boot_partition</code> 后保存并重启，测试 U-Boot 是否能够引导 Recovery
系统启动，以此判断配置文件是否生效。</p>
</li><li class="- topic/li li" data-ofbid="d96062e449__20250121171535">在分区表中，增加 env 备份分区，保障 env 数据掉电安全。<p class="- topic/p p" data-ofbid="d96062e451__20250121171535">在 <span class="+ topic/ph sw-d/filepath ph filepath">image_cfg.json</span>
配置修改如下：</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_abf_wf4_hdc" data-ofbid="id__pre_abf_wf4_hdc"><span class="hl-string">"env"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"256k"</span> },
+ <span class="hl-string">"env_r"</span>: { <span class="hl-string">"size"</span>: <span class="hl-string">"256k"</span> }, <em class="hl-comment">//在 env 分区后面增加 env_r 分区</em>
<span class="hl-string">"env"</span>: {
<span class="hl-string">"file"</span>: <span class="hl-string">"env.bin"</span>,
<span class="hl-string">"attr"</span>: [<span class="hl-string">"mtd"</span>, <span class="hl-string">"required"</span>],
- <span class="hl-string">"part"</span>: [<span class="hl-string">"env"</span>]
+ <span class="hl-string">"part"</span>: [<span class="hl-string">"env"</span>,<span class="hl-string">"env_r"</span>] <em class="hl-comment">//将 env.bin 文件同时烧录到 env、env_r 分区</em>
},</pre><p class="- topic/p p" data-ofbid="d96062e458__20250121171535">通过升级串口打印信息可以判断 <span class="+ topic/ph sw-d/filepath ph filepath">env.bin</span> 文件是否烧录到
<code class="+ topic/ph pr-d/codeph ph codeph">env_r</code> 分区，判断配置是否生效。</p></li><li class="- topic/li li" data-ofbid="d96062e466__20250121171535">
<div class="- topic/div div section" id="id__u-boot-env-redundant">
<strong class="+ topic/ph hi-d/b ph b">U-Boot 中使能 Redundant Environment </strong>机制<p class="- topic/p p" data-ofbid="d96062e473__20250121171535">执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">make
um</span> 进入功能配置界面，并按如下选择使能 Redundant Environment 机制：</p><div class="- topic/div div highlight-kconfig notranslate">
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_rg3_wf4_hdc" data-ofbid="id__pre_rg3_wf4_hdc">Environment ---&gt;
[*] Enable redundant environment support
(<span class="hl-number">0x200000</span>) Redundant environment offset</pre>
</div><ul class="- topic/ul ul arabic simple" id="id__ol_tg3_wf4_hdc" data-ofbid="id__ol_tg3_wf4_hdc"><li class="- topic/li li" data-ofbid="d96062e484__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e486__20250121171535">当升级过程中掉电时，其中一份环境变量如果被破坏，另外一份环境变量还能够继续引导启动。</p>
</li><li class="- topic/li li" data-ofbid="d96062e489__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e491__20250121171535">用户可以手动擦除其中一份环境变量，测试系统能否正常启动，写入保存环境变量后，被擦除的环境变量是否能够恢复。</p>
</li><li class="- topic/li li" data-ofbid="d96062e494__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e496__20250121171535"><span class="+ topic/keyword pr-d/parmname keyword parmname">CONFIG_ENV_OFFSET_REDUND</span> 为 <code class="+ topic/ph pr-d/codeph ph codeph">env_r
分区</code>的偏移值，需要与分区表匹配。</p>
</li></ul><div class="- topic/note note trouble note_trouble" id="id__note_tbl_3hy_3dc" data-ofbid="id__note_tbl_3hy_3dc"><span class="note__title">故障：</span>
<div class="- topic/div div">
<div class="- topic/p p" data-ofbid="d96062e508__20250121171535">当使能了 Redundant
机制，编译后烧录程序时，可能会出现如下错误信息：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_yzk_jzr_ldc" data-ofbid="id__codeblock_yzk_jzr_ldc">Loading Environment from RAM... *** Warning - bad CRC, using <strong class="hl-keyword">default</strong> environment</pre></div>
<div class="- topic/p p" data-ofbid="d96062e513__20250121171535">因为 U-Boot 解析的方法发生了改变，解析数据格式增加了一个字节，判断哪一份 env 数据最新，具体可以通过
redundant 宏查看对应的程序。 可在 <span class="+ topic/ph sw-d/filepath ph filepath">image_cfg.json</span>
中做如下修改进行解决：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_vg3_wf4_hdc" data-ofbid="id__pre_vg3_wf4_hdc"> <span class="hl-string">"uboot_env"</span>: {
<span class="hl-string">"env.bin"</span>: {
<span class="hl-string">"file"</span>: <span class="hl-string">"env.txt"</span>,
<span class="hl-string">"size"</span>: <span class="hl-string">"0x4000"</span>,
+ <span class="hl-string">"redundant"</span>: <span class="hl-string">"enable"</span>,
},
},</pre></div>
<div class="- topic/note note note note_note admonition" id="id__note_wg3_wf4_hdc" data-ofbid="id__note_wg3_wf4_hdc"><span class="note__title">注：</span>
<p class="- topic/p p" data-ofbid="d96062e523__20250121171535">不使能 env 备份区域，设置 “redundant” 为 “disable” 或者不设置。</p>
</div>
</div>
</div></div>
</li><li class="- topic/li li" data-ofbid="d96062e529__20250121171535">
<div class="- topic/div div section" id="id__fw-env-config">配置
<span class="+ topic/ph sw-d/filepath ph filepath">fw_env.config</span>
<p class="- topic/p p" data-ofbid="d96062e538__20250121171535">在 OTA 升级过程中，主系统和 Recovery 系统都使用到 SWUpdate 命令。SWUpdate 依赖 U-Boot
环境变量，需要在 Linux 中配置 U-Boot 环境变量索引路径。<code class="+ topic/ph pr-d/codeph ph codeph">fw_env.config</code> 和
<span class="+ topic/keyword sw-d/cmdname keyword cmdname">fw_setenv</span> 命令默认会读取
<span class="+ topic/ph sw-d/filepath ph filepath">/etc/fw_env.config</span> 文件来获取环境变量的分区信息。</p><ol class="- topic/ol ol" type="a" id="id__ol_vft_mhy_3dc" data-ofbid="id__ol_vft_mhy_3dc"><li class="- topic/li li" data-ofbid="d96062e550__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e552__20250121171535">编辑 <span class="+ topic/ph sw-d/filepath ph filepath">fw_env.config</span> 文件，添加 eMMC 的分区信息。</p>
<ul class="- topic/ul ul" id="id__ul_w4z_tcs_ldc" data-ofbid="id__ul_w4z_tcs_ldc"><li class="- topic/li li" data-ofbid="d96062e559__20250121171535"><span class="+ topic/ph sw-d/filepath ph filepath">fw_printenv/fw_setenv</span> 命令默认索引路径为
<span class="+ topic/ph sw-d/filepath ph filepath">/etc/fw_env.config</span>。<p class="- topic/p p" data-ofbid="d96062e566__20250121171535">因为使用到了
<code class="+ topic/ph pr-d/codeph ph codeph">env_r</code>
备份分区，<span class="+ topic/ph sw-d/filepath ph filepath">fw_env.config</span> 需要包含
<code class="+ topic/ph pr-d/codeph ph codeph">env</code> 和 <code class="+ topic/ph pr-d/codeph ph codeph">env_r</code>
分区信息。</p><p class="- topic/p p" data-ofbid="d96062e580__20250121171535">如果用户修改了 <code class="+ topic/ph pr-d/codeph ph codeph">env</code> 和
<code class="+ topic/ph pr-d/codeph ph codeph">env_r</code> 分区信息，确保主系统和 Recovery 系统的
<span class="+ topic/ph sw-d/filepath ph filepath">fw_env.config</span>
文件同步更新。</p></li><li class="- topic/li li" data-ofbid="d96062e591__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e593__20250121171535">Recovery 系统 SDK 生产环境默认存储在
<span class="+ topic/ph sw-d/filepath ph filepath">fw_env.config</span> 文件中，路径为
<span class="+ topic/ph sw-d/filepath ph filepath">target/d211/ota_emmc/rootfs_overlay/etc/fw_env.config</span>。</p>
</li><li class="- topic/li li" data-ofbid="d96062e602__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e604__20250121171535">主系统 SDK 生产环境默认存储在 <span class="+ topic/ph sw-d/filepath ph filepath">fw_env.config
</span>文件中，路径为
<span class="+ topic/ph sw-d/filepath ph filepath">target/d211/demo/rootfs_overlay/etc/fw_env.config</span>。</p>
</li></ul>
<div class="- topic/p p" data-ofbid="d96062e614__20250121171535">eMMC
的默认的配置信息如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_grl_wf4_hdc" data-ofbid="id__pre_grl_wf4_hdc"><em class="hl-comment">//device name Device offset Env. size</em>
/dev/mmcblk0 <span class="hl-number">0x1C0000</span> <span class="hl-number">0x4000</span>
/dev/mmcblk0 <span class="hl-number">0x200000</span> <span class="hl-number">0x4000</span>
</pre></div>
<ul class="- topic/ul ul arabic simple" id="id__ol_irl_wf4_hdc" data-ofbid="id__ol_irl_wf4_hdc"><li class="- topic/li li" data-ofbid="d96062e620__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e622__20250121171535"><code class="+ topic/ph pr-d/codeph ph codeph">/dev/mmcblk0</code>： eMMC 分区的设备号</p>
</li><li class="- topic/li li" data-ofbid="d96062e627__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e629__20250121171535"><code class="+ topic/ph pr-d/codeph ph codeph">Device offset</code>：环境变量分区的偏移值</p>
</li><li class="- topic/li li" data-ofbid="d96062e634__20250121171535">
<p class="- topic/p p" data-ofbid="d96062e636__20250121171535"><code class="+ topic/ph pr-d/codeph ph codeph">Env. size</code>：实际环境变量的大小</p>
</li></ul>
</li><li class="- topic/li li" data-ofbid="d96062e642__20250121171535">在 Linux 环境下执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">fw_printenv/fw_setenv</span>
命令，测试能够正常打印 U-Boot
环境变量信息。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_sd2_ycs_ldc" data-ofbid="id__codeblock_sd2_ycs_ldc">fw_printenv/fw_setenv</pre></li></ol></div>
</li></ol></div>
</section><section class="- topic/section section" id="id__id5" data-ofbid="id__id5"><h2 class="- topic/title title sectiontitle">启动脚本配置</h2>
<div class="- topic/note note tip note_tip admonition tip" data-ofbid="d96062e657__20250121171535"><span class="note__title">提示：</span>
<p class="- topic/p p" data-ofbid="d96062e659__20250121171535">为了简化使用，启动脚本配置一般无需修改即可使用。</p>
</div>
<ol class="- topic/ol ol" id="id__ol_bqy_wf4_hdc" data-ofbid="id__ol_bqy_wf4_hdc"><li class="- topic/li li" data-ofbid="d96062e664__20250121171535">
<div class="- topic/div div section" id="id__s90swupdate">
<strong class="+ topic/ph hi-d/b ph b"><span class="+ topic/ph sw-d/filepath ph filepath">S90swupdate</span></strong>
<p class="- topic/p p" data-ofbid="d96062e672__20250121171535">主系统 和 Recovery 系统默认启动脚本 <span class="+ topic/ph sw-d/filepath ph filepath">S90swupdate</span>，路径为
<span class="+ topic/ph sw-d/filepath ph filepath">package/third-party/swupdate/S90swupdate</span>。</p><p class="- topic/p p" data-ofbid="d96062e680__20250121171535">在后台执行
<span class="+ topic/keyword sw-d/cmdname keyword cmdname">swupdate-progress</span> 命令，可以接受 SWUpdate
传递的升级信息并打印到调试串口，用户也可以重定向到显示屏上：</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_vhd_xf4_hdc" data-ofbid="id__pre_vhd_xf4_hdc">exec /usr/bin/swupdate-progress -w -r &amp;</pre></div>
</li><li class="- topic/li li" data-ofbid="d96062e688__20250121171535">
<div class="- topic/div div section" id="id__s91swupdate-ota">
<strong class="+ topic/ph hi-d/b ph b"><span class="+ topic/ph sw-d/filepath ph filepath">S91swupdate_ota</span></strong>
<p class="- topic/p p" data-ofbid="d96062e696__20250121171535">Recovery 系统启动脚本路径为
<span class="+ topic/ph sw-d/filepath ph filepath">target/d211/ota_emmc/rootfs_overlay/etc/init.d/S91swupdate_ota</span></p><p class="- topic/p p" data-ofbid="d96062e700__20250121171535">主要功能如下：</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__pre_zbg_xf4_hdc" data-ofbid="id__pre_zbg_xf4_hdc">mkdir -p /mnt/ota
mount /dev/mmcblk0p7 /mnt/ota <em class="hl-comment">//挂载 ota 分区到 mnt/ota 目录下</em>
./usr/lib/swupdate/swupdate_cmd.sh <em class="hl-comment">//调用 swupdate_cmd.sh 脚本执行 OTA 升级程序</em></pre><div class="- topic/note note note note_note admonition" id="id__note_acg_xf4_hdc" data-ofbid="id__note_acg_xf4_hdc"><span class="note__title">注：</span>
<p class="- topic/p p" data-ofbid="d96062e706__20250121171535">如需自定义分区，则对应的设备节点会有变更，此时需要修改对应的挂载方式。</p>
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