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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/psadc/psadc_debug.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">调试指南</h1><div class="date inPage">17 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" id="psadc_debug_guide__section_mpg_hsz_21c" data-ofbid="psadc_debug_guide__section_mpg_hsz_21c"><h2 class="- topic/title title sectiontitle">调试开关</h2>
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<ol class="- topic/ol ol" data-ofbid="d154136e27__20250121171614"><li class="- topic/li li" data-ofbid="d154136e28__20250121171614">
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<div class="- topic/div div">
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<div class="- topic/p p" data-ofbid="d154136e32__20250121171614">在 SDK 根目录下，执行下列命令，进入 kernel
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的功能配置界面：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="psadc_debug_guide__codeblock_wg1_3ml_sdc" data-ofbid="psadc_debug_guide__codeblock_wg1_3ml_sdc">make kernel-menuconfig</pre></div>
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<p class="- topic/p p" data-ofbid="d154136e37__20250121171614">或使用简写命令</p>
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<div class="- topic/p p" data-ofbid="d154136e40__20250121171614">
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="psadc_debug_guide__codeblock_uss_hml_sdc" data-ofbid="psadc_debug_guide__codeblock_uss_hml_sdc">make km</pre>
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</div>
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</div>
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</li><li class="- topic/li li" data-ofbid="d154136e47__20250121171614">
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<div class="- topic/p p" data-ofbid="d154136e49__20250121171614">在内核配置界面，按如下选择，打开 PSADC 模块的 DEBUG
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选项：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="psadc_debug_guide__pre_npg_hsz_21c" data-ofbid="psadc_debug_guide__pre_npg_hsz_21c">Linux
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Kernel hacking
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Artinchip Debug
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[*] PSADC driver debug</pre></div>
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</li></ol>
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<div class="- topic/p p" data-ofbid="d154136e55__20250121171614">打开 DEBUG 选项后：<ul class="- topic/ul ul" id="psadc_debug_guide__ol_ucp_mss_c1c" data-ofbid="psadc_debug_guide__ol_ucp_mss_c1c"><li class="- topic/li li" data-ofbid="d154136e58__20250121171614">
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<p class="- topic/p p" data-ofbid="d154136e60__20250121171614">驱动以<code class="+ topic/ph pr-d/codeph ph codeph">-O0</code> 编译。</p>
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</li><li class="- topic/li li" data-ofbid="d154136e66__20250121171614">
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<p class="- topic/p p" data-ofbid="d154136e68__20250121171614"><span class="+ topic/keyword pr-d/parmname keyword parmname">pr_dbg()</span> 和 <span class="+ topic/keyword pr-d/parmname keyword parmname">dev_dbg()</span> 调试信息会被编译。</p>
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<div class="- topic/p p" id="psadc_debug_guide__p_wvf_n3w_mdc" data-ofbid="psadc_debug_guide__p_wvf_n3w_mdc">在系统运行时，如果要打印 <span class="+ topic/keyword pr-d/parmname keyword parmname">pr_dbg()</span> 和
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<span class="+ topic/keyword pr-d/parmname keyword parmname">dev_dbg()</span> 信息，还需要调整 <span class="+ topic/keyword pr-d/parmname keyword parmname">loglevel</span> 为
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8，可以通过以下两种方式实现：<ul class="- topic/ul ul" id="psadc_debug_guide__ol_vcp_mss_c1c" data-ofbid="psadc_debug_guide__ol_vcp_mss_c1c"><li class="- topic/li li" data-ofbid="d154136e88__20250121171614">
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<p class="- topic/p p" data-ofbid="d154136e90__20250121171614">在 <span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span> 中修改
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<span class="+ topic/keyword pr-d/parmname keyword parmname">bootargs</span>，增加
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<span class="+ topic/keyword pr-d/parmname keyword parmname">“loglevel=8”</span></p>
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</li><li class="- topic/li li" data-ofbid="d154136e101__20250121171614">
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<div class="- topic/p p" data-ofbid="d154136e103__20250121171614">在板子启动到 Linux Shell
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后，执行下列命令：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="psadc_debug_guide__pre_wcp_mss_c1c" data-ofbid="psadc_debug_guide__pre_wcp_mss_c1c">echo8 > /proc/sys/kernel/printk</pre></div>
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</li></ul></div>
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</li></ul></div>
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</section><section class="- topic/section section" id="psadc_debug_guide__section_rpg_hsz_21c" data-ofbid="psadc_debug_guide__section_rpg_hsz_21c"><h2 class="- topic/title title sectiontitle">Sysfs 节点</h2>
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<p class="- topic/p p" data-ofbid="d154136e115__20250121171614">IIO 子系统会为 ADC 设备创建一组标准的 Sysfs 节点文件，可用于读取 ADC 的数值。</p>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="psadc_debug_guide__pre_spg_hsz_21c" data-ofbid="psadc_debug_guide__pre_spg_hsz_21c">cd /sys/devices/platform/soc/<span class="hl-number">18210000.</span>psadc/iio:device0</pre>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="psadc_debug_guide__codeblock_ock_kfr_sdc" data-ofbid="psadc_debug_guide__codeblock_ock_kfr_sdc">ls</pre>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="psadc_debug_guide__codeblock_n42_lfr_sdc" data-ofbid="psadc_debug_guide__codeblock_n42_lfr_sdc">dev in_voltage5_raw
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events in_voltage5_raw_available
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in_voltage0_raw in_voltage6_raw
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in_voltage0_raw_available in_voltage6_raw_available
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in_voltage10_raw in_voltage7_raw
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in_voltage10_raw_available in_voltage7_raw_available
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in_voltage11_raw in_voltage8_raw
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in_voltage11_raw_available in_voltage8_raw_available
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in_voltage1_raw in_voltage9_raw
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in_voltage1_raw_available in_voltage9_raw_available
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in_voltage2_raw in_voltage_scale
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in_voltage2_raw_available name
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in_voltage3_raw of_node
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in_voltage3_raw_available power
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in_voltage4_raw subsystem
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in_voltage4_raw_available uevent
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</pre>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="psadc_debug_guide__codeblock_xws_lfr_sdc" data-ofbid="psadc_debug_guide__codeblock_xws_lfr_sdc">cat in_voltage7_raw<em class="+ topic/ph hi-d/i ph i"># <span class="hl-number">4095</span></em></pre>
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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="#psadc_debug_guide__section_mpg_hsz_21c" data-tocid="psadc_debug_guide__section_mpg_hsz_21c">调试开关</a></div></li><li class="section-item"><div class="section-title"><a href="#psadc_debug_guide__section_rpg_hsz_21c" data-tocid="psadc_debug_guide__section_rpg_hsz_21c">Sysfs 节点</a></div></li></ul></div>
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