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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"><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/dma/dma-debug-guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">调试指南</h1><div class="date inPage">16 Dec 2024</div><div style="color: gray;">
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Read time: 1 minute(s)
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</div><div class="- topic/body concept/conbody body conbody"><section class="- topic/section section" data-ofbid="d337272e22__20250121171849">
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<p class="- topic/p p" data-ofbid="d337272e24__20250121171849">在 <span class="- topic/ph ph">Luban-Lite</span> 中，DMA 驱动的日志控制接口共用了全局的 <span class="+ topic/ph sw-d/filepath ph filepath">aic_log.h</span>
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接口。</p>
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<div class="- topic/p p" data-ofbid="d337272e33__20250121171849">为了方便调试，DMA 模块增加了一个 dump 控制开关，可以在运行时丢弃每次 DMA 请求的任务链表详细信息。<ul class="- topic/ul ul" id="concept_l2x_zrf_h1c__ul_kf2_gby_bdc" data-ofbid="concept_l2x_zrf_h1c__ul_kf2_gby_bdc"><li class="- topic/li li" data-ofbid="d337272e36__20250121171849">执行下列命令和步骤打开 DMA 调试：<ol class="- topic/ol ol" id="concept_l2x_zrf_h1c__ol_fyx_jby_bdc" data-ofbid="concept_l2x_zrf_h1c__ol_fyx_jby_bdc"><li class="- topic/li li" data-ofbid="d337272e39__20250121171849">执行<span class="+ topic/keyword sw-d/cmdname keyword cmdname">scons --menuconfig</span>命令，进入 menuconfig 的功能配置界面。</li><li class="- topic/li li" data-ofbid="d337272e44__20250121171849">在配置界面选择使能 DMA 驱动调试：Drivers options ---> Drivers debug ---> [*]
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Enable DMA driver debug。</li></ol></li><li class="- topic/li li" data-ofbid="d337272e46__20250121171849">DMA 驱动会在命令行中注册 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">dma_dump</span> 命令，可查询通道状态，执行下列命令可以使用 dump
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控制：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_l2x_zrf_h1c__codeblock_zf1_5by_bdc" data-ofbid="concept_l2x_zrf_h1c__codeblock_zf1_5by_bdc">dma_dump <span class="hl-number">0</span>
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</pre><div class="- topic/p p" data-ofbid="d337272e53__20250121171849">输出示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_l2x_zrf_h1c__codeblock_rc2_z1y_bdc" data-ofbid="concept_l2x_zrf_h1c__codeblock_rc2_z1y_bdc">DMA Ch0: desc = <span class="hl-number">0x0</span>
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Common <strong class="hl-keyword">register</strong>:
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IRQ_EN <span class="hl-number">0x4</span>, IRQ_STA <span class="hl-number">0x0</span>, CH_STA <span class="hl-number">0x0</span>, GATE <span class="hl-number">0x0</span>
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Ch0 <strong class="hl-keyword">register</strong>:
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Enable <span class="hl-number">0x0</span>, Mode <span class="hl-number">0x0</span>, Pause <span class="hl-number">0x0</span>
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Task <span class="hl-number">0xfffff800</span>, Config <span class="hl-number">0x4c004c0</span>, Src <span class="hl-number">0x4177a204</span>, Sink <span class="hl-number">0x42165384</span>
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Left <span class="hl-number">0x0</span>, Package_cnt <span class="hl-number">1</span></pre></div></li></ul></div>
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<div class="- topic/note note note note_note" id="concept_l2x_zrf_h1c__note_sdh_vby_bdc" data-ofbid="concept_l2x_zrf_h1c__note_sdh_vby_bdc"><span class="note__title">注：</span>
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<p class="- topic/p p" data-ofbid="d337272e60__20250121171849">DMA 驱动并没有用到 RT-Thread 的设备框架，所以在目标板上使用命令 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">list_device</span> 不会看到 DMA
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设备。</p>
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