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id="id-d4445e7075-link">PSADC 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="uart_user_guide-d4445e7215" class="topicref" data-id="uart_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action uart_user_guide-d4445e7215-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/uart/uart_user_guide.html" id="uart_user_guide-d4445e7215-link">UART 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="usb_user_guide-d4445e7299" class="topicref" data-id="usb_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action usb_user_guide-d4445e7299-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/usb/usb_user_guide.html" id="usb_user_guide-d4445e7299-link">USB 使用指南</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-safety-d4445e7944" class="topicref" data-id="chapter-safety" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-safety-d4445e7944-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-safety-sdk.html" id="chapter-safety-d4445e7944-link">安全</a><div class="wh-tooltip"><p class="shortdesc">SPI ENC、CE、eFuse 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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<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/pinctrl/pinctrl-debug_guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">调试指南</h1>
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<div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 1 minute(s)
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<div class="- topic/body concept/conbody body conbody">
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<section class="- topic/section section" id="pinctrl_debug_guide__section_qcc_kfs_21c" data-ofbid="pinctrl_debug_guide__section_qcc_kfs_21c"><h2 class="- topic/title title sectiontitle">调试开关</h2>
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<div class="- topic/p p" data-ofbid="d55091e38__20250123155202">PINCTRL 模块的驱动有一些 dbg 调试信息，默认情况下是没有打开的，当需要跟踪调试时，可通过以下步骤打开这些调试信息。<ol class="- topic/ol ol" id="pinctrl_debug_guide__ul_nmb_lfs_21c" data-ofbid="pinctrl_debug_guide__ul_nmb_lfs_21c">
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<li class="- topic/li li" data-ofbid="d55091e42__20250123155202">调整 log 等级<p class="- topic/p p" data-ofbid="d55091e44__20250123155202">在 Luban 根目录下执行 make
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kernel-menuconfig，进入 kernel 的功能配置，调整内核的 log 等级。</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pinctrl_debug_guide__pre_scc_kfs_21c" data-ofbid="pinctrl_debug_guide__pre_scc_kfs_21c"><code>Kernel hacking--->
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printk and dmesg options--->
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(<span class="hl-number">8</span>) Default console loglevel (<span class="hl-number">1</span>-<span class="hl-number">15</span>)
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</code></pre></li>
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<li class="- topic/li li" data-ofbid="d55091e49__20250123155202">打开调试开关<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pinctrl_debug_guide__pre_tcc_kfs_21c" data-ofbid="pinctrl_debug_guide__pre_tcc_kfs_21c"><code>Kernel hacking--->
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ArtInChip Debug--->
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[*] Pinctrl driver debug
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</code></pre></li>
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</ol></div>
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</section>
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<section class="- topic/section section" id="pinctrl_debug_guide__section_ucc_kfs_21c" data-ofbid="pinctrl_debug_guide__section_ucc_kfs_21c"><h2 class="- topic/title title sectiontitle">debugfs 调试</h2>
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<div class="- topic/p p" data-ofbid="d55091e61__20250123155202">pinctrl 子系统中实现了一些调试函数，可以打印各个 gpio 口的配置信息，所以可以利用 debugfs 查看信息，辅助调试。<ol class="- topic/ol ol" id="pinctrl_debug_guide__ol_psv_mfs_21c" data-ofbid="pinctrl_debug_guide__ol_psv_mfs_21c">
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<li class="- topic/li li" data-ofbid="d55091e65__20250123155202">打开 debugfs<p class="- topic/p p" data-ofbid="d55091e67__20250123155202">SDK 已默认打开了 debugfs。也可以通过以下方式打开：</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pinctrl_debug_guide__pre_wcc_kfs_21c" data-ofbid="pinctrl_debug_guide__pre_wcc_kfs_21c"><code>Kernel hacking--->
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Generic Kernel Debugging Instruments
|
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Debug Filesystem
|
||
Debugfs <strong class="+ topic/ph hi-d/b ph b"><strong class="hl-keyword">default</strong></strong> access(Access normal)--->
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</code></pre></li>
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<li class="- topic/li li" data-ofbid="d55091e75__20250123155202">挂载 debugfs<p class="- topic/p p" data-ofbid="d55091e77__20250123155202">内核启动后，需要手动挂载 debugfs：</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pinctrl_debug_guide__pre_ycc_kfs_21c" data-ofbid="pinctrl_debug_guide__pre_ycc_kfs_21c"><code>mount -t debugfs none /sys/kernel/debug
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</code></pre><p class="- topic/p p" data-ofbid="d55091e81__20250123155202">将 debugfs 挂载到/sys/kernel/debug 目录下。</p></li>
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<li class="- topic/li li" data-ofbid="d55091e84__20250123155202">查看 debugfs 结点<p class="- topic/p p" data-ofbid="d55091e86__20250123155202">打开 debugfs 中 pinctrl 目录：</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pinctrl_debug_guide__pre_adc_kfs_21c" data-ofbid="pinctrl_debug_guide__pre_adc_kfs_21c"><code>cd /sys/kernel/debug/pinctrl
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</code></pre><p class="- topic/p p" data-ofbid="d55091e90__20250123155202">可以看到该目录下有多个结点，可打印当前 pinctrl 各种信息，用于辅助调试。</p></li>
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