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id="gstreamer-d4445e5582-link">Gstreamer 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="i2s-d4445e5680" class="topicref" data-id="i2s" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action i2s-d4445e5680-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/i2s/i2s_user_guide.html" id="i2s-d4445e5680-link">I2S 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="audio_codec_user_guide-d4445e5806" class="topicref" data-id="audio_codec_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action audio_codec_user_guide-d4445e5806-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/audio_codec/audio-codec-user-guide.html" id="audio_codec_user_guide-d4445e5806-link">Audio Codec 使用指南</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div 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等安全模块的介绍和使用说明。</p></div></div></div></li></ul></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" title="Edit this document" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/display/display_faq_screen.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">调屏常见问题</h1>
|
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|
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<div class="date inPage">15 Jan 2024</div><div style="color: gray;">
|
||
Read time: 3 minute(s)
|
||
</div>
|
||
<div class="- topic/body concept/conbody body conbody">
|
||
<div class="- topic/p p" data-ofbid="d186810e33__20250123155220">屏幕无法点亮会涉及很多因素，主要排除的地方有三处：DTS 配置、内核编译配置、DE&DI 寄存器设置。这里提供一个 debug 思路。<ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_pc4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_pc4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e37__20250123155220">启动 debug 开关，检查 kernel 启动时打印到控制台的信息，检查驱动是否报 error，根据 error 解决问题</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e40__20250123155220">kernel 中是否生成设备结点/dev/fb0，如果没有，按/dev/fb0 设备文件缺失思路进行检查</li>
|
||
</ol></div>
|
||
<section class="- topic/section section" id="concept_smb_cl3_pzb__section_dch_llg_d1c" data-ofbid="concept_smb_cl3_pzb__section_dch_llg_d1c"><h2 class="- topic/title title sectiontitle">PRGB 接口屏</h2>
|
||
|
||
<div class="- topic/p p" data-ofbid="d186810e49__20250123155220">
|
||
<ul class="- topic/ul ul" id="concept_smb_cl3_pzb__ul_bqh_mlg_d1c" data-ofbid="concept_smb_cl3_pzb__ul_bqh_mlg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e53__20250123155220"><strong class="+ topic/ph hi-d/b ph b">现象一：黑屏</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_qc4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_qc4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e58__20250123155220">检查背光是否已亮</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e61__20250123155220">排除 1 后确定屏规格书是 SYNC 模式还是 DE 模式，检查硬件电路相关控制信号是否按照屏规格书要求完成上下拉</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e64__20250123155220">排除 1、2 后，测量 pixelclk 是否符合屏规格要求，pixelclk 计算公式如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_smb_cl3_pzb__codeblock_z2s_zc4_f1c" data-ofbid="concept_smb_cl3_pzb__codeblock_z2s_zc4_f1c"><code>pixelclk = (hactive + hback-porch + hfront-porch + hsync-len)
|
||
* (vactive + vback-porch + vfront-porch + vsync-len) * 帧率
|
||
|
||
时钟频率 = 有效+消隐的总时间 * 帧率</code></pre></li>
|
||
</ol></li>
|
||
<li class="- topic/li li" data-ofbid="d186810e70__20250123155220"><strong class="+ topic/ph hi-d/b ph b">现象二:花屏</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_tc4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_tc4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e75__20250123155220">调整 pixelclk 频率</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e78__20250123155220">调整 pixelclk 相位</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e81__20250123155220">调整消隐区参数，主要是行方向消隐区</li>
|
||
</ol><div class="- topic/note note note note_note" id="concept_smb_cl3_pzb__note_srj_4lg_d1c" data-ofbid="concept_smb_cl3_pzb__note_srj_4lg_d1c"><span class="note__title">注：</span> <div class="note__body">
|
||
<p class="- topic/p p" data-ofbid="d186810e86__20250123155220">如果图像显示存在斑点，在颜色渐变区域尤为明显，优先调整 pixelclk 时钟输出相位，RGB 接口支持 0, 90, 180, 270
|
||
四个相位。</p>
|
||
</div></div><div class="- topic/p p" data-ofbid="d186810e89__20250123155220">pixelclk 时钟相位对应 <span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span>
|
||
参数<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_smb_cl3_pzb__codeblock_o4p_4lg_d1c" data-ofbid="concept_smb_cl3_pzb__codeblock_o4p_4lg_d1c"><code>panel_rgb {
|
||
...
|
||
clock-phase = <DEGREE_<span class="hl-number">0</span>>;
|
||
...
|
||
}</code></pre></div></li>
|
||
<li class="- topic/li li" data-ofbid="d186810e97__20250123155220"><strong class="+ topic/ph hi-d/b ph b">现象三:起始位置错误</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_xc4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_xc4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e102__20250123155220">调整 pixelclk 频率</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e105__20250123155220">调整 pixelclk 相位</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e108__20250123155220">调整消隐区参数，主要是行方向消隐区</li>
|
||
</ol></li>
|
||
<li class="- topic/li li" data-ofbid="d186810e112__20250123155220"><strong class="+ topic/ph hi-d/b ph b">现象四:闪烁</strong><ul class="- topic/ul ul" id="concept_smb_cl3_pzb__ol_yc4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_yc4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e117__20250123155220">增大 pixelclk 频率，提高帧率</li>
|
||
</ul></li>
|
||
</ul>
|
||
</div>
|
||
</section>
|
||
<section class="- topic/section section" id="concept_smb_cl3_pzb__section_sc4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__section_sc4_rkg_d1c"><h2 class="- topic/title title sectiontitle">LVDS 接口屏</h2>
|
||
|
||
<ul class="- topic/ul ul" id="concept_smb_cl3_pzb__ul_ks3_tlg_d1c" data-ofbid="concept_smb_cl3_pzb__ul_ks3_tlg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e131__20250123155220">现象一：黑屏<ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_zc4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_zc4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e135__20250123155220">检查背光是否已亮</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e138__20250123155220">排除 1 后，检查 LVDS 通道是否连接正确，检查硬件电路相关控制信号是否按照屏规格书要求完成上下拉，检查屏规格书是 VESA 模式还是 JEIDA 模式</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e141__20250123155220">排除 1、2 后，测量 pixelclk 是否符合屏规格要求，pixelclk 计算公式 vactive*hactive*60/(0.8)，其中系数 60 为帧率，系数 0.8 为消隐区系数;LVDS 接口中有一对时钟差分信号 CK，若为单通道，则实测 pixelclk=7ck;若为双通道，则实测 pixelclk=3.5ck;</li>
|
||
</ol></li>
|
||
<li class="- topic/li li" data-ofbid="d186810e145__20250123155220"><strong class="+ topic/ph hi-d/b ph b">现象二:花屏</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_ad4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_ad4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e150__20250123155220">调整 pixelclk 频率</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e153__20250123155220">调整消隐区参数，主要是行方向消隐区</li>
|
||
</ol></li>
|
||
<li class="- topic/li li" data-ofbid="d186810e157__20250123155220"><strong class="+ topic/ph hi-d/b ph b">现象三:起始位置错误</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_bd4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_bd4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e162__20250123155220">调整 pixelclk 频率</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e165__20250123155220">调整消隐区参数，主要是行方向消隐区</li>
|
||
</ol></li>
|
||
<li class="- topic/li li" data-ofbid="d186810e169__20250123155220"><strong class="+ topic/ph hi-d/b ph b">现象四:闪烁</strong><ul class="- topic/ul ul" id="concept_smb_cl3_pzb__ol_cd4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_cd4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e174__20250123155220">增大 pixelclk 频率，提高帧率</li>
|
||
</ul></li>
|
||
</ul>
|
||
</section>
|
||
<section class="- topic/section section" id="concept_smb_cl3_pzb__section_kf1_wlg_d1c" data-ofbid="concept_smb_cl3_pzb__section_kf1_wlg_d1c"><h2 class="- topic/title title sectiontitle">DSI 接口屏</h2>
|
||
|
||
<div class="- topic/p p" data-ofbid="d186810e185__20250123155220">
|
||
<ul class="- topic/ul ul" id="concept_smb_cl3_pzb__ul_ssv_wlg_d1c" data-ofbid="concept_smb_cl3_pzb__ul_ssv_wlg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e189__20250123155220"><strong class="+ topic/ph hi-d/b ph b">现象一：黑屏</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_dd4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_dd4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e194__20250123155220">检查背光是否已亮</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e197__20250123155220">排除 1 后，检查硬件电路相关控制信号是否按照屏规格书要求完成上下拉。检查与屏的连接是否成功，通常使用读屏驱动 ID 检查。检查初始化流程是否正确，检查屏规格书是 Commad 模式还是 Video 模式</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e200__20250123155220">排除 1、2 后，测量 pixelclk 是否符合屏规格要求，pixelclk 计算公式 vactive*hactive*60/(0.8)，其中系数 60 为帧率，系数 0.8 为消隐区系数</li>
|
||
</ol></li>
|
||
<li class="- topic/li li" data-ofbid="d186810e204__20250123155220"><strong class="+ topic/ph hi-d/b ph b">现象二:花屏</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_ed4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_ed4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e209__20250123155220">检查屏数据格式，检查数据 lane 数量</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e212__20250123155220">调整 pixelclk 频率</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e215__20250123155220">调整消隐区参数，主要是行方向消隐区</li>
|
||
</ol></li>
|
||
<li class="- topic/li li" data-ofbid="d186810e219__20250123155220"><strong class="+ topic/ph hi-d/b ph b">现象三:起始位置错误</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_fd4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_fd4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e224__20250123155220">调整 pixelclk 频率</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e227__20250123155220">调整消隐区参数，主要是行方向消隐区</li>
|
||
</ol></li>
|
||
<li class="- topic/li li" data-ofbid="d186810e231__20250123155220"><strong class="+ topic/ph hi-d/b ph b">现象四:闪烁</strong><ul class="- topic/ul ul" id="concept_smb_cl3_pzb__ol_gd4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_gd4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e236__20250123155220">增大 pixelclk 频率，提高帧率</li>
|
||
</ul></li>
|
||
</ul>
|
||
</div>
|
||
</section>
|
||
<section class="- topic/section section" id="concept_smb_cl3_pzb__section_nbj_ylg_d1c" data-ofbid="concept_smb_cl3_pzb__section_nbj_ylg_d1c"><h2 class="- topic/title title sectiontitle">SRGB 接口屏</h2>
|
||
|
||
<div class="- topic/p p" data-ofbid="d186810e248__20250123155220">
|
||
<ul class="- topic/ul ul" id="concept_smb_cl3_pzb__ul_kgl_1mg_d1c" data-ofbid="concept_smb_cl3_pzb__ul_kgl_1mg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e252__20250123155220"><strong class="+ topic/ph hi-d/b ph b"> 现象一：黑屏</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_hd4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_hd4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e257__20250123155220">检查背光是否已亮</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e260__20250123155220">排除 1 后，检查硬件电路相关控制信号是否按照屏规格书要求完成上下拉。检查与屏的连接是否成功，通常使用读屏驱动 ID 检查。检查初始化流程是否正确</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e263__20250123155220">排除 1、2 后，测量 pixelclk 是否符合屏规格要求，pixelclk 计算公式 vactive*hactive*60/(0.8)，其中系数 60 为帧率，系数 0.8 为消隐区系数</li>
|
||
</ol></li>
|
||
<li class="- topic/li li" data-ofbid="d186810e267__20250123155220"><strong class="+ topic/ph hi-d/b ph b">现象二:花屏</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_id4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_id4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e272__20250123155220">检查屏数据格式，格式为 RGB 还是 BGR</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e275__20250123155220">调整 pixelclk 频率</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e278__20250123155220">调整消隐区参数，主要是行方向消隐区</li>
|
||
</ol></li>
|
||
<li class="- topic/li li" data-ofbid="d186810e282__20250123155220"><strong class="+ topic/ph hi-d/b ph b"> 现象三:起始位置错误</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_jd4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_jd4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e287__20250123155220">调整 pixelclk 频率</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e290__20250123155220">调整消隐区参数，主要是行方向消隐区</li>
|
||
</ol></li>
|
||
<li class="- topic/li li" data-ofbid="d186810e294__20250123155220"><strong class="+ topic/ph hi-d/b ph b"> 现象四:闪烁</strong><ul class="- topic/ul ul" id="concept_smb_cl3_pzb__ol_kd4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_kd4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e299__20250123155220">
|
||
<p class="- topic/p p" data-ofbid="d186810e301__20250123155220">增大 pixelclk 频率，提高帧率</p>
|
||
</li>
|
||
</ul></li>
|
||
</ul>
|
||
</div>
|
||
</section>
|
||
<section class="- topic/section section" id="concept_smb_cl3_pzb__section_w3g_zlg_d1c" data-ofbid="concept_smb_cl3_pzb__section_w3g_zlg_d1c"><h2 class="- topic/title title sectiontitle">I8080&SPI 接口屏</h2>
|
||
|
||
<div class="- topic/p p" data-ofbid="d186810e315__20250123155220">
|
||
<ul class="- topic/ul ul" id="concept_smb_cl3_pzb__ul_i2f_dmg_d1c" data-ofbid="concept_smb_cl3_pzb__ul_i2f_dmg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e319__20250123155220"><strong class="+ topic/ph hi-d/b ph b">现象一：黑屏</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_ld4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_ld4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e324__20250123155220">检查背光是否已亮</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e327__20250123155220">排除 1 后，检查硬件电路相关控制信号是否按照屏规格书要求完成上下拉。检查与屏的连接是否成功，通常使用读屏驱动 ID 检查。检查初始化流程是否正确</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e330__20250123155220">排除 1、2 后，测量 pixelclk 是否符合屏规格要求，pixelclk 计算公式 vactive*hactive*60/(0.8)，其中系数 60 为帧率，系数 0.8 为消隐区系数</li>
|
||
</ol></li>
|
||
<li class="- topic/li li" data-ofbid="d186810e334__20250123155220"><strong class="+ topic/ph hi-d/b ph b">现象二:花屏</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_md4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_md4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e339__20250123155220">检查屏数据格式</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e342__20250123155220">调整 pixelclk 频率</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e345__20250123155220">调整消隐区参数，主要是行方向消隐区</li>
|
||
</ol></li>
|
||
<li class="- topic/li li" data-ofbid="d186810e349__20250123155220"><strong class="+ topic/ph hi-d/b ph b">现象三:起始位置错误</strong><ol class="- topic/ol ol" id="concept_smb_cl3_pzb__ol_nd4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_nd4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e354__20250123155220">调整 pixelclk 频率</li>
|
||
<li class="- topic/li li" data-ofbid="d186810e357__20250123155220">调整消隐区参数，主要是行方向消隐区</li>
|
||
</ol></li>
|
||
<li class="- topic/li li" data-ofbid="d186810e361__20250123155220"><strong class="+ topic/ph hi-d/b ph b">现象四:闪烁</strong><ul class="- topic/ul ul" id="concept_smb_cl3_pzb__ol_od4_rkg_d1c" data-ofbid="concept_smb_cl3_pzb__ol_od4_rkg_d1c">
|
||
<li class="- topic/li li" data-ofbid="d186810e366__20250123155220">增大 pixelclk 频率，提高帧率</li>
|
||
</ul></li>
|
||
</ul>
|
||
</div>
|
||
</section>
|
||
</div>
|
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</article></main></div>
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<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#concept_smb_cl3_pzb__section_dch_llg_d1c" data-tocid="concept_smb_cl3_pzb__section_dch_llg_d1c">PRGB 接口屏</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_smb_cl3_pzb__section_sc4_rkg_d1c" data-tocid="concept_smb_cl3_pzb__section_sc4_rkg_d1c">LVDS 接口屏</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_smb_cl3_pzb__section_kf1_wlg_d1c" data-tocid="concept_smb_cl3_pzb__section_kf1_wlg_d1c">DSI 接口屏</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_smb_cl3_pzb__section_nbj_ylg_d1c" data-tocid="concept_smb_cl3_pzb__section_nbj_ylg_d1c">SRGB 接口屏</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_smb_cl3_pzb__section_w3g_zlg_d1c" data-tocid="concept_smb_cl3_pzb__section_w3g_zlg_d1c">I8080&SPI 接口屏</a></div></li></ul></div>
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