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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/watchdog/watchdog-debug.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>
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<div class="- topic/body concept/conbody body conbody">
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<section class="- topic/section section" id="watchdog_debug_guide__section_rkl_l4v_mdc" data-ofbid="watchdog_debug_guide__section_rkl_l4v_mdc"><h2 class="- topic/title title sectiontitle">调试开关</h2>
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<ol class="- topic/ol ol" id="watchdog_debug_guide__ol_q3w_fkz_sdc" data-ofbid="watchdog_debug_guide__ol_q3w_fkz_sdc">
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<li class="- topic/li li" data-ofbid="d120730e40__20250123155210">
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<div class="- topic/div div">
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<div class="- topic/p p" data-ofbid="d120730e44__20250123155210">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="watchdog_debug_guide__codeblock_wg1_3ml_sdc" data-ofbid="watchdog_debug_guide__codeblock_wg1_3ml_sdc"><code>make kernel-menuconfig</code></pre></div>
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<p class="- topic/p p" data-ofbid="d120730e49__20250123155210">或使用简写命令</p>
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<div class="- topic/p p" data-ofbid="d120730e52__20250123155210">
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="watchdog_debug_guide__codeblock_uss_hml_sdc" data-ofbid="watchdog_debug_guide__codeblock_uss_hml_sdc"><code>make km</code></pre>
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</div>
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</div>
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</li>
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<li class="- topic/li li" data-ofbid="d120730e60__20250123155210">在内核配置界面，按如下选择，打开调试开关：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="watchdog_debug_guide__codeblock_e5g_q1t_c1c" data-ofbid="watchdog_debug_guide__codeblock_e5g_q1t_c1c"><code>Linux
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Kernel hacking
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ArtInChip Debug
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[*] Watchdog driver debug</code></pre><div class="- topic/p p" data-ofbid="d120730e64__20250123155210">打开 DEBUG 选项后：<ul class="- topic/ul ul" id="watchdog_debug_guide__ol_ucp_mss_c1c" data-ofbid="watchdog_debug_guide__ol_ucp_mss_c1c">
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<li class="- topic/li li" data-ofbid="d120730e68__20250123155210">
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<p class="- topic/p p" data-ofbid="d120730e70__20250123155210">驱动以<code class="+ topic/ph pr-d/codeph ph codeph">-O0</code> 编译。</p>
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</li>
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<li class="- topic/li li" data-ofbid="d120730e77__20250123155210">
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<p class="- topic/p p" data-ofbid="d120730e79__20250123155210"><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="watchdog_debug_guide__p_wvf_n3w_mdc" data-ofbid="watchdog_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="watchdog_debug_guide__ol_vcp_mss_c1c" data-ofbid="watchdog_debug_guide__ol_vcp_mss_c1c">
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<li class="- topic/li li" data-ofbid="d120730e100__20250123155210">
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<p class="- topic/p p" data-ofbid="d120730e102__20250123155210">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>
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<li class="- topic/li li" data-ofbid="d120730e114__20250123155210">
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<div class="- topic/p p" data-ofbid="d120730e116__20250123155210">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="watchdog_debug_guide__pre_wcp_mss_c1c" data-ofbid="watchdog_debug_guide__pre_wcp_mss_c1c"><code>echo8 > /proc/sys/kernel/printk</code></pre></div>
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</li>
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</ul></div>
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</li>
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</ul></div></li>
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</ol>
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</section>
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<section class="- topic/section section" id="watchdog_debug_guide__section_sck_m4v_mdc" data-ofbid="watchdog_debug_guide__section_sck_m4v_mdc"><h2 class="- topic/title title sectiontitle">Sysfs 节点</h2>
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<div class="- topic/p p" data-ofbid="d120730e132__20250123155210">
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<ol class="- topic/ol ol" data-ofbid="d120730e134__20250123155210">
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<li class="- topic/li li" id="watchdog_debug_guide__li_sysfs_status_tsensor" data-ofbid="watchdog_debug_guide__li_sysfs_status_tsensor"><strong class="+ topic/ph hi-d/b ph b">状态信息</strong><div class="- topic/p p" data-ofbid="d120730e139__20250123155210">在 Watchdog 驱动初始化成功后，会在 Sysfs 中注册生成一个 <code class="+ topic/ph pr-d/codeph ph codeph">status</code> 节点，其中打印了当前的 Watchdog
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配置及状态信息：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="watchdog_debug_guide__codeblock_szr_42t_c1c" data-ofbid="watchdog_debug_guide__codeblock_szr_42t_c1c"><code>cat /sys/devices/platform/soc/<span class="hl-number">19000000.</span>watchdog/status</code></pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="watchdog_debug_guide__codeblock_b51_sds_5dc" data-ofbid="watchdog_debug_guide__codeblock_b51_sds_5dc"><code>In Watchdog V256.<span class="hl-number">00</span>:
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Module Enable: <span class="hl-number">0</span>
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Dbg <strong class="hl-keyword">continue</strong>: <span class="hl-number">0</span>
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clr_thd: <span class="hl-number">333</span>
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Write disable: <span class="hl-number">0</span>
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IRQ Enable: <span class="hl-number">0</span>
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Current chan: <span class="hl-number">0</span> <span class="hl-number">0</span>
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Current cnt: <span class="hl-number">352</span>
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chan clr_thd irq_thd rst_thd
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<span class="hl-number">0</span> <span class="hl-number">0</span> <span class="hl-number">160000</span> <span class="hl-number">320000</span>
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<span class="hl-number">1</span> <span class="hl-number">0</span> <span class="hl-number">160000</span> <span class="hl-number">320000</span>
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<span class="hl-number">2</span> <span class="hl-number">0</span> <span class="hl-number">160000</span> <span class="hl-number">320000</span>
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<span class="hl-number">3</span> <span class="hl-number">0</span> <span class="hl-number">160000</span> <span class="hl-number">320000</span></code></pre></div></li>
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<li class="- topic/li li" id="watchdog_debug_guide__li_sysfs_temperature_read" data-ofbid="watchdog_debug_guide__li_sysfs_temperature_read"><strong class="+ topic/ph hi-d/b ph b"><strong class="+ topic/ph hi-d/b ph b">当前的 Watchdog 通道信息</strong></strong><div class="- topic/p p" data-ofbid="d120730e153__20250123155210">查看当前生效正在使用的
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Watchdog
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通道信息：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="watchdog_debug_guide__codeblock_kwz_p2t_c1c" data-ofbid="watchdog_debug_guide__codeblock_kwz_p2t_c1c"><code>cat /sys/devices/platform/soc<em class="hl-comment">/*.watchdog/timeout —— 当前通道的 timeout 配置
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10</em></code></pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="watchdog_debug_guide__codeblock_urq_sds_5dc" data-ofbid="watchdog_debug_guide__codeblock_urq_sds_5dc"><code>cat /sys/devices/platform/soc<em class="hl-comment">/*.watchdog/pretimeout —— 当前通道的 pretimeout 配置
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0</em></code></pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="watchdog_debug_guide__codeblock_kwc_tds_5dc" data-ofbid="watchdog_debug_guide__codeblock_kwc_tds_5dc"><code>cat /sys/devices/platform/soc<em class="hl-comment">/*.watchdog/channel —— 当前生效的通道编号
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0</em></code></pre></div></li>
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</ol>
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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="#watchdog_debug_guide__section_rkl_l4v_mdc" data-tocid="watchdog_debug_guide__section_rkl_l4v_mdc">调试开关</a></div></li><li class="section-item"><div class="section-title"><a href="#watchdog_debug_guide__section_sck_m4v_mdc" data-tocid="watchdog_debug_guide__section_sck_m4v_mdc">Sysfs 节点</a></div></li></ul></div>
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