wen/luban-lite-t3e-pro
1
0
Fork 0
mirror of https://gitee.com/Vancouver2017/luban-lite-t3e-pro.git synced 2025-12-14 18:38:55 +00:00
Code Issues Packages Projects Releases Wiki Activity
Files
b4033d8696b77dddcafce4e00eaaf2a01ccc38fb
luban-lite-t3e-pro/doc/topics/sdk/pwm/pwm_debug.html
刘可亮 b4033d8696 add doc v1.1.2
2025-01-23 16:37:00 +08:00

378 lines
50 KiB
HTML
Raw Blame History

This file contains ambiguous Unicode characters
This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-cn" lang="zh-cn" data-whc_version="26.0">
<head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><meta name="description" content="调试开关 在 SDK 根目录下，执行下列命令，进入 kernel 的功能配置界面： make kernel-menuconfig 或使用简写命令 make km 在内核配置界面，打开 PWM 模块的 DEBUG 选项： Linux Kernel hacking Artinchip Debug [*] PWM driver debug 打开 DEBUG 选项后： 驱动以 -O0 编译。 ..."/><meta name="DC.rights.owner" content="(C) 版权 2025"/><meta name="copyright" content="(C) 版权 2025"/><meta name="generator" content="DITA-OT"/><meta name="DC.type" content="concept"/><meta name="DC.contributor" content="yan.wang"/><meta name="DC.date.modified" content="2024-12-18"/><meta name="DC.format" content="HTML5"/><meta name="DC.identifier" content="pwm_debug_guide"/><meta name="DC.language" content="zh-CN"/><title>调试指南</title><!-- Build number 2023110923. --><meta name="wh-path2root" content="../../../"/><meta name="wh-toc-id" content=""/><meta name="wh-source-relpath" content="topics/sdk/pwm/pwm_debug.dita"/><meta name="wh-out-relpath" content="topics/sdk/pwm/pwm_debug.html"/>
<link rel="stylesheet" type="text/css" href="../../../webhelp/app/commons.css?buildId=2023110923"/>
<link rel="stylesheet" type="text/css" href="../../../webhelp/app/topic.css?buildId=2023110923"/>
<script src="../../../webhelp/app/options/properties.js?buildId=20250121171154"></script>
<script src="../../../webhelp/app/localization/strings.js?buildId=2023110923"></script>
<script src="../../../webhelp/app/search/index/keywords.js?buildId=20250121171154"></script>
<script defer="defer" src="../../../webhelp/app/commons.js?buildId=2023110923"></script>
<script defer="defer" src="../../../webhelp/app/topic.js?buildId=2023110923"></script>
<link rel="stylesheet" type="text/css" href="../../../webhelp/template/aic-styles-web.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/notes.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/aic-common.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/aic-images.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/footnote.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/aic-web-watermark.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/topic-body-list.css?buildId=2023110923"/></head>
<body id="pwm_debug_guide" class="wh_topic_page frmBody">
<a href="#wh_topic_body" class="sr-only sr-only-focusable">
跳转到主要内容
</a>
<header class="navbar navbar-default wh_header">
<div class="container-fluid">
<div class="wh_header_flex_container navbar-nav navbar-expand-md navbar-dark">
<div class="wh_logo_and_publication_title_container">
<div class="wh_logo_and_publication_title">
<a href="http://www.artinchip.com" class=" wh_logo d-none d-sm-block "><img src="../../../company-logo-white.png" alt="RTOS SDK 使用指南SDK 指南文件"/></a>
<div class=" wh_publication_title "><a href="../../../index.html"><span class="booktitle"><span class="ph mainbooktitle">RTOS SDK 使用指南</span><span class="ph booktitlealt">SDK 指南文件</span></span></a></div>
</div>
</div>
<div class="wh_top_menu_and_indexterms_link collapse navbar-collapse" id="wh_top_menu_and_indexterms_link">
</div>
</div>
</div>
</header>
<div class=" wh_search_input navbar-form wh_topic_page_search search " role="form">
<form id="searchForm" method="get" role="search" action="../../../search.html"><div><input type="search" placeholder="搜索 " class="wh_search_textfield" id="textToSearch" name="searchQuery" aria-label="搜索查询" required="required"/><button type="submit" class="wh_search_button" aria-label="搜索"><span class="search_input_text">搜索</span></button></div></form>
</div>
<div class="container-fluid" id="wh_topic_container">
<div class="row">
<nav class="wh_tools d-print-none navbar-expand-md" aria-label="Tools">
<div data-tooltip-position="bottom" class=" wh_breadcrumb "></div>
<div class="wh_right_tools">
<button class="wh_hide_highlight" aria-label="切换搜索突出显示" title="切换搜索突出显示"></button>
<button class="webhelp_expand_collapse_sections" data-next-state="collapsed" aria-label="折叠截面" title="折叠截面"></button>
<div class=" wh_print_link print d-none d-md-inline-block "><button onClick="window.print()" title="打印此页" aria-label="打印此页"></button></div>
</div>
</nav>
</div>
<div class="wh_content_area">
<div class="row">
<div class="col-lg-10 col-md-10 col-sm-10 col-xs-12" id="wh_topic_body">
<button id="wh_close_topic_toc_button" class="close-toc-button d-none" aria-label="Toggle topic table of content" aria-controls="wh_topic_toc" aria-expanded="true">
<span class="close-toc-icon-container">
<span class="close-toc-icon"></span>
</span>
</button>
<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/pwm/pwm_debug.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">调试指南</h1><div class="date inPage">18 Dec 2024</div><div style="color: gray;">
Read time: 9 minute(s)
</div><div class="- topic/body concept/conbody body conbody"><section class="- topic/section section" id="pwm_debug_guide__section_tnj_ljs_21c" data-ofbid="pwm_debug_guide__section_tnj_ljs_21c"><h2 class="- topic/title title sectiontitle">调试开关</h2>
<div class="- topic/p p" data-ofbid="d309715e27__20250121171815">
<ol class="- topic/ol ol" id="pwm_debug_guide__ul_qhh_btr_sdc" data-ofbid="pwm_debug_guide__ul_qhh_btr_sdc"><li class="- topic/li li" data-ofbid="d309715e30__20250121171815">
<div class="- topic/div div">
<div class="- topic/p p" data-ofbid="d309715e34__20250121171815">在 SDK 根目录下，执行下列命令，进入 kernel
的功能配置界面：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_wg1_3ml_sdc" data-ofbid="pwm_debug_guide__codeblock_wg1_3ml_sdc">make kernel-menuconfig</pre></div>
<p class="- topic/p p" data-ofbid="d309715e39__20250121171815">或使用简写命令</p>
<div class="- topic/p p" data-ofbid="d309715e42__20250121171815">
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_uss_hml_sdc" data-ofbid="pwm_debug_guide__codeblock_uss_hml_sdc">make km</pre>
</div>
</div>
</li><li class="- topic/li li" data-ofbid="d309715e49__20250121171815">
<p class="- topic/p p" data-ofbid="d309715e51__20250121171815">在内核配置界面，打开 PWM 模块的 DEBUG 选项：</p>
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__pre_unj_ljs_21c" data-ofbid="pwm_debug_guide__pre_unj_ljs_21c">Linux
Kernel hacking
Artinchip Debug
[*] PWM driver debug</pre>
<div class="- topic/p p" data-ofbid="d309715e57__20250121171815">打开 DEBUG 选项后：<ul class="- topic/ul ul" id="pwm_debug_guide__ol_ucp_mss_c1c" data-ofbid="pwm_debug_guide__ol_ucp_mss_c1c"><li class="- topic/li li" data-ofbid="d309715e60__20250121171815">
<p class="- topic/p p" data-ofbid="d309715e62__20250121171815">驱动以<code class="+ topic/ph pr-d/codeph ph codeph">-O0</code> 编译。</p>
</li><li class="- topic/li li" data-ofbid="d309715e68__20250121171815">
<p class="- topic/p p" data-ofbid="d309715e70__20250121171815"><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>
<div class="- topic/p p" id="pwm_debug_guide__p_wvf_n3w_mdc" data-ofbid="pwm_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
<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
8，可以通过以下两种方式实现：<ul class="- topic/ul ul" id="pwm_debug_guide__ol_vcp_mss_c1c" data-ofbid="pwm_debug_guide__ol_vcp_mss_c1c"><li class="- topic/li li" data-ofbid="d309715e90__20250121171815">
<p class="- topic/p p" data-ofbid="d309715e92__20250121171815">在 <span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span> 中修改
<span class="+ topic/keyword pr-d/parmname keyword parmname">bootargs</span>，增加
<span class="+ topic/keyword pr-d/parmname keyword parmname">“loglevel=8”</span></p>
</li><li class="- topic/li li" data-ofbid="d309715e103__20250121171815">
<div class="- topic/p p" data-ofbid="d309715e105__20250121171815">在板子启动到 Linux Shell
后，执行下列命令：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__pre_wcp_mss_c1c" data-ofbid="pwm_debug_guide__pre_wcp_mss_c1c">echo8 &gt; /proc/sys/kernel/printk</pre></div>
</li></ul></div>
</li></ul></div>
</li></ol>
</div>
</section><section class="- topic/section section" id="pwm_debug_guide__section_ynj_ljs_21c" data-ofbid="pwm_debug_guide__section_ynj_ljs_21c"><h2 class="- topic/title title sectiontitle">查看 Sysfs 中的状态信息</h2>
<div class="- topic/p p" data-ofbid="d309715e119__20250121171815">在 PWM/EPWM 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> 状态节点，其中打印了当前的 PWM/ EPWM
配置及状态信息：<ul class="- topic/ul ul" id="pwm_debug_guide__ul_l4s_dtr_sdc" data-ofbid="pwm_debug_guide__ul_l4s_dtr_sdc"><li class="- topic/li li" data-ofbid="d309715e125__20250121171815">
<div class="- topic/p p" data-ofbid="d309715e127__20250121171815">查看 PWM
状态节点：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_zmc_xjs_21c" data-ofbid="pwm_debug_guide__codeblock_zmc_xjs_21c">cat /sys/devices/platform/soc/<span class="hl-number">19240000.</span>pwm/status</pre></div>
<div class="- topic/p p" data-ofbid="d309715e132__20250121171815">输出示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_k1k_dtr_sdc" data-ofbid="pwm_debug_guide__codeblock_k1k_dtr_sdc">In PWM V1.<span class="hl-number">00</span>:
Module Enable: <span class="hl-number">1</span>, IRQ Enable: <span class="hl-number">0x0</span>
Ch En Mode Tb-clk-rate Def CBD CBU CAD CAU PRD ZRO
<span class="hl-number">0</span> <span class="hl-number">0</span> Up <span class="hl-number">0</span> <span class="hl-number">0</span> - - - - - -
- - - - - -
<span class="hl-number">1</span> <span class="hl-number">0</span> Up <span class="hl-number">0</span> <span class="hl-number">0</span> - - - - - -
- - - - - -
<span class="hl-number">2</span> <span class="hl-number">1</span> Up <span class="hl-number">24000000</span> <span class="hl-number">0</span> - - - Hgh Low -
- - - Low Hgh -
<span class="hl-number">3</span> <span class="hl-number">0</span> Up <span class="hl-number">0</span> <span class="hl-number">0</span> - - - - - -
- - - - - -</pre></div>
</li><li class="- topic/li li" data-ofbid="d309715e137__20250121171815">
<div class="- topic/p p" data-ofbid="d309715e139__20250121171815">查看 EPWM
状态节点：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_wgx_xjs_21c" data-ofbid="pwm_debug_guide__codeblock_wgx_xjs_21c">cat /sys/devices/platform/soc/<span class="hl-number">18200000.e</span>pwm/status</pre></div>
<div class="- topic/p p" data-ofbid="d309715e144__20250121171815">输出示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_zgb_ftr_sdc" data-ofbid="pwm_debug_guide__codeblock_zgb_ftr_sdc">Ch Mode Tb-clk-rate Def CBD CBU CAD CAU PRD ZRO
<span class="hl-number">0</span> Up <span class="hl-number">24000000</span> <span class="hl-number">1</span> - - - Hgh - Low
- Hgh - - - Low
<span class="hl-number">1</span> Up <span class="hl-number">24000000</span> <span class="hl-number">1</span> - - - Hgh - Low
- Hgh - - - Low
<span class="hl-number">2</span> Up <span class="hl-number">24000000</span> <span class="hl-number">1</span> - - - Hgh - Low
- Hgh - - - Low
<span class="hl-number">3</span> Up <span class="hl-number">0</span> <span class="hl-number">0</span> - - - - - -
- - - - - -
<span class="hl-number">4</span> Up <span class="hl-number">0</span> <span class="hl-number">0</span> - - - - - -
- - - - - -
<span class="hl-number">5</span> Up <span class="hl-number">0</span> <span class="hl-number">0</span> - - - - - -
- - - - - -</pre></div>
</li></ul></div>
</section><section class="- topic/section section" id="pwm_debug_guide__section_zvv_b5r_sdc" data-ofbid="pwm_debug_guide__section_zvv_b5r_sdc"><h2 class="- topic/title title sectiontitle">查看 Sysfs 中的背光设置</h2>
<div class="- topic/p p" data-ofbid="d309715e155__20250121171815">Linux 背光子系统提供了用来获取和设置当前背光的 Sysfs 节点。例如，执行下列命令可以查看和修改 Linux 系统中背光的当前亮度和最大亮度：<ol class="- topic/ol ol" id="pwm_debug_guide__ol_rb5_w5r_sdc" data-ofbid="pwm_debug_guide__ol_rb5_w5r_sdc"><li class="- topic/li li" data-ofbid="d309715e158__20250121171815">
<div class="- topic/p p" data-ofbid="d309715e160__20250121171815">查看背光配置：<ul class="- topic/ul ul" id="pwm_debug_guide__ol_tgx_4tr_sdc" data-ofbid="pwm_debug_guide__ol_tgx_4tr_sdc"><li class="- topic/li li" data-ofbid="d309715e163__20250121171815">进入背光配置目录：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_xsq_4js_21c" data-ofbid="pwm_debug_guide__codeblock_xsq_4js_21c">cd /sys/class/backlight/backlight/</pre></li><li class="- topic/li li" data-ofbid="d309715e167__20250121171815">
<div class="- topic/p p" data-ofbid="d309715e169__20250121171815">列出当前所有背光配置：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_qgs_ptr_sdc" data-ofbid="pwm_debug_guide__codeblock_qgs_ptr_sdc">ls /sys/class/backlight/backlight/</pre></div>
<div class="- topic/p p" data-ofbid="d309715e174__20250121171815">输出示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_c2g_qtr_sdc" data-ofbid="pwm_debug_guide__codeblock_c2g_qtr_sdc">actual_brightness device/ subsystem/
bl_power max_brightness type
brightness scale uevent</pre></div>
</li><li class="- topic/li li" data-ofbid="d309715e179__20250121171815">
<div class="- topic/p p" data-ofbid="d309715e181__20250121171815">查看最大亮度<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_l1w_qtr_sdc" data-ofbid="pwm_debug_guide__codeblock_l1w_qtr_sdc">cat max_brightness</pre></div>
<div class="- topic/p p" data-ofbid="d309715e186__20250121171815">输出示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_azg_rtr_sdc" data-ofbid="pwm_debug_guide__codeblock_azg_rtr_sdc"><span class="hl-number">10</span></pre></div>
</li><li class="- topic/li li" data-ofbid="d309715e191__20250121171815">查看当前亮度<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_dcd_rtr_sdc" data-ofbid="pwm_debug_guide__codeblock_dcd_rtr_sdc">cat brightness</pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_shl_vtr_sdc" data-ofbid="pwm_debug_guide__codeblock_shl_vtr_sdc"><span class="hl-number">8</span></pre></li></ul></div>
</li><li class="- topic/li li" id="pwm_debug_guide__li_ms1_2h1_tdc" data-ofbid="pwm_debug_guide__li_ms1_2h1_tdc">
<div class="- topic/p p" data-ofbid="d309715e200__20250121171815">修改背光配置：<ul class="- topic/ul ul" id="pwm_debug_guide__ul_xs1_2h1_tdc" data-ofbid="pwm_debug_guide__ul_xs1_2h1_tdc"><li class="- topic/li li" data-ofbid="d309715e203__20250121171815">
<div class="- topic/p p" data-ofbid="d309715e205__20250121171815">将亮度设置为
9：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_c2r_vtr_sdc" data-ofbid="pwm_debug_guide__codeblock_c2r_vtr_sdc">echo <span class="hl-number">9</span> &gt; brightness</pre></div>
<div class="- topic/p p" data-ofbid="d309715e210__20250121171815">输出示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_hls_v5r_sdc" data-ofbid="pwm_debug_guide__codeblock_hls_v5r_sdc">[ <span class="hl-number">146.913635</span>] backlight: set brightness to <span class="hl-number">9</span>
[ <span class="hl-number">154.054433</span>] aic-pwm <span class="hl-number">19240000.</span>pwm: ch0 duty <span class="hl-number">900000</span> period <span class="hl-number">1000000</span></pre></div>
</li><li class="- topic/li li" data-ofbid="d309715e215__20250121171815">
<p class="- topic/p p" data-ofbid="d309715e217__20250121171815">将亮度设置为 10：</p>
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_ntn_wtr_sdc" data-ofbid="pwm_debug_guide__codeblock_ntn_wtr_sdc">echo <span class="hl-number">10</span> &gt; brightness</pre>
<div class="- topic/p p" data-ofbid="d309715e223__20250121171815">输出示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_hnb_1vr_sdc" data-ofbid="pwm_debug_guide__codeblock_hnb_1vr_sdc">[ <span class="hl-number">192.145595</span>] backlight: set brightness to <span class="hl-number">10</span>
[ <span class="hl-number">192.151118</span>] aic-pwm <span class="hl-number">19240000.</span>pwm: ch0 duty <span class="hl-number">1000000</span> period <span class="hl-number">1000000</span></pre></div>
</li><li class="- topic/li li" data-ofbid="d309715e228__20250121171815">
<div class="- topic/p p" data-ofbid="d309715e230__20250121171815">将亮度重新设置为
9<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_uqx_wtr_sdc" data-ofbid="pwm_debug_guide__codeblock_uqx_wtr_sdc">echo <span class="hl-number">9</span> &gt; brightness</pre></div>
<div class="- topic/p p" data-ofbid="d309715e235__20250121171815">输出示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_yqq_bvr_sdc" data-ofbid="pwm_debug_guide__codeblock_yqq_bvr_sdc">
[ <span class="hl-number">194.681923</span>] backlight: set brightness to <span class="hl-number">9</span>
[ <span class="hl-number">194.687264</span>] aic-pwm <span class="hl-number">19240000.</span>pwm: ch0 duty <span class="hl-number">900000</span> period <span class="hl-number">1000000</span></pre></div>
</li><li class="- topic/li li" data-ofbid="d309715e240__20250121171815">
<div class="- topic/p p" data-ofbid="d309715e242__20250121171815">将亮度设置为
8<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_zxk_xtr_sdc" data-ofbid="pwm_debug_guide__codeblock_zxk_xtr_sdc">echo <span class="hl-number">8</span> &gt; brightness</pre></div>
<div class="- topic/p p" data-ofbid="d309715e247__20250121171815">输出示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_d1z_cvr_sdc" data-ofbid="pwm_debug_guide__codeblock_d1z_cvr_sdc">[ <span class="hl-number">197.748816</span>] backlight: set brightness to <span class="hl-number">8</span>
[ <span class="hl-number">197.753606</span>] aic-pwm <span class="hl-number">19240000.</span>pwm: ch0 duty <span class="hl-number">800000</span> period <span class="hl-number">1000000</span></pre></div>
</li><li class="- topic/li li" data-ofbid="d309715e252__20250121171815">
<p class="- topic/p p" data-ofbid="d309715e254__20250121171815">将亮度设置为 7</p>
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_n3v_xtr_sdc" data-ofbid="pwm_debug_guide__codeblock_n3v_xtr_sdc">echo <span class="hl-number">7</span> &gt; brightness</pre>
</li></ul></div>
</li></ol></div>
</section><section class="- topic/section section" id="pwm_debug_guide__section_czn_c5r_sdc" data-ofbid="pwm_debug_guide__section_czn_c5r_sdc"><h2 class="- topic/title title sectiontitle">动态配置 PWM 通道</h2>
<p class="- topic/p p" data-ofbid="d309715e267__20250121171815">为了提供调试的效率，PWM/ EPWM 驱动都包含一个 <span class="+ topic/ph sw-d/filepath ph filepath">config</span> 节点，可在系统运行时动态修改任意 PWM 或 EPWM
通道的任意参数 ，且修改可立即生效。动态配置 PWM 通道，允许开发者在不重新编译固件或重启设备的情况下调整 PWM 参数。</p>
<div class="- topic/p p" data-ofbid="d309715e273__20250121171815">假设需要动态配置一个 PWM 通道，设备路径为
<span class="+ topic/ph sw-d/filepath ph filepath">/sys/devices/platform/soc/1924000.pwm/config</span>，以及一个 EPWM
通道，设备路径为 <span class="+ topic/ph sw-d/filepath ph filepath">/sys/devices/platform/soc/18200000.epwm/config</span>：<div class="- topic/note note note note_note" id="pwm_debug_guide__note_mft_fwr_sdc" data-ofbid="pwm_debug_guide__note_mft_fwr_sdc"><span class="note__title">注：</span> 关于<span class="+ topic/ph sw-d/filepath ph filepath">config</span> 节点参数，详情可查看 <a xml:lang="zh-CN" lang="zh-CN" class="- topic/xref xref" href="pwm_debug.html#pwm_debug_guide__section_xhp_3wr_sdc">config 节点参数描述</a>。</div></div>
<div class="- topic/p p" data-ofbid="d309715e291__20250121171815">
<ol class="- topic/ol ol" id="pwm_debug_guide__ol_e4j_ljs_21c" data-ofbid="pwm_debug_guide__ol_e4j_ljs_21c"><li class="- topic/li li" data-ofbid="d309715e294__20250121171815">使用一步 Shell 中的 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">echo</span> 操作，修改 <span class="+ topic/ph sw-d/filepath ph filepath">dts</span>
中的通道参数。<ul class="- topic/ul ul" id="pwm_debug_guide__ul_gl2_vwr_sdc" data-ofbid="pwm_debug_guide__ul_gl2_vwr_sdc"><li class="- topic/li li" data-ofbid="d309715e303__20250121171815">PWM：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_utb_bks_21c" data-ofbid="pwm_debug_guide__codeblock_utb_bks_21c">echo <span class="hl-string">"0 1 0 24000000 1 0 2 0 0 1 0"</span> &gt; /sys/devices/platform/soc/<span class="hl-number">1924000.</span>pwm/config</pre></li><li class="- topic/li li" data-ofbid="d309715e307__20250121171815">
<div class="- topic/p p" data-ofbid="d309715e309__20250121171815">EPWM<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_iqv_wwr_sdc" data-ofbid="pwm_debug_guide__codeblock_iqv_wwr_sdc">echo <span class="hl-string">"0 0 0 24000000 0 0 0 0 1 0 2"</span> &gt; /sys/devices/platform/soc/<span class="hl-number">18200000.e</span>pwm/config</pre></div>
</li></ul></li><li class="- topic/li li" data-ofbid="d309715e314__20250121171815">
<p class="- topic/p p" data-ofbid="d309715e316__20250121171815">修改完配置后，查看 <code class="+ topic/ph pr-d/codeph ph codeph">status</code> 文件确认配置是否生效：</p>
<ul class="- topic/ul ul" id="pwm_debug_guide__ul_vpv_ywr_sdc" data-ofbid="pwm_debug_guide__ul_vpv_ywr_sdc"><li class="- topic/li li" data-ofbid="d309715e323__20250121171815">PWM<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_tyz_dwr_sdc" data-ofbid="pwm_debug_guide__codeblock_tyz_dwr_sdc">cat /sys/devices/platform/soc/<span class="hl-number">19240000.</span>pwm/status</pre><div class="- topic/p p" data-ofbid="d309715e327__20250121171815">输出示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_x3x_swr_sdc" data-ofbid="pwm_debug_guide__codeblock_x3x_swr_sdc">In PWM V1.<span class="hl-number">00</span>:
Module Enable: <span class="hl-number">1</span>, IRQ Enable: <span class="hl-number">0x0</span>
Ch En Mode Tb-clk-rate Def CBD CBU CAD CAU PRD ZRO
<span class="hl-number">0</span> <span class="hl-number">1</span> Up <span class="hl-number">24000000</span> <span class="hl-number">1</span> - - - Hgh Low -
- Hgh - - Low -
<span class="hl-number">1</span> <span class="hl-number">0</span> Up <span class="hl-number">24000000</span> <span class="hl-number">1</span> - - - Hgh Low Low
- - - - - -
<span class="hl-number">2</span> <span class="hl-number">0</span> Up <span class="hl-number">24000000</span> <span class="hl-number">0</span> - - - - - -
- - - - - -
<span class="hl-number">3</span> <span class="hl-number">0</span> Up <span class="hl-number">24000000</span> <span class="hl-number">0</span> - - - - - -
- - - - - -</pre></div></li><li class="- topic/li li" data-ofbid="d309715e331__20250121171815">
<p class="- topic/p p" data-ofbid="d309715e333__20250121171815">EPWM</p>
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_bs2_bks_21c" data-ofbid="pwm_debug_guide__codeblock_bs2_bks_21c">cat /sys/devices/platform/soc/<span class="hl-number">18200000.e</span>pwm/status</pre>
<div class="- topic/p p" data-ofbid="d309715e339__20250121171815">输出示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_zjy_zwr_sdc" data-ofbid="pwm_debug_guide__codeblock_zjy_zwr_sdc">Ch Mode Tb-clk-rate Def CBD CBU CAD CAU PRD ZRO
<span class="hl-number">0</span> Up <span class="hl-number">24000000</span> <span class="hl-number">0</span> - - - Low - Hgh
- Hgh - - - Low
<span class="hl-number">1</span> Up <span class="hl-number">24000000</span> <span class="hl-number">1</span> - - - Hgh - Low
- Hgh - - - Low
<span class="hl-number">2</span> Up <span class="hl-number">24000000</span> <span class="hl-number">1</span> - - - Hgh - Low
- Hgh - - - Low
<span class="hl-number">3</span> Up <span class="hl-number">0</span> <span class="hl-number">0</span> - - - - - -
- - - - - -
<span class="hl-number">4</span> Up <span class="hl-number">0</span> <span class="hl-number">0</span> - - - - - -
- - - - - -
<span class="hl-number">5</span> Up <span class="hl-number">0</span> <span class="hl-number">0</span> - - - - - -
- - - - - -</pre></div>
</li></ul>
</li><li class="- topic/li li" data-ofbid="d309715e345__20250121171815">编译 U-Boot 和镜像文件。</li><li class="- topic/li li" data-ofbid="d309715e347__20250121171815">重启板子后下载最新镜像。</li><li class="- topic/li li" data-ofbid="d309715e349__20250121171815">使用示波器查看该 PWM 通道的信号输出是否符合预期。 </li><li class="- topic/li li" data-ofbid="d309715e351__20250121171815">配置 PWM 输出占空比。<div class="- topic/p p" data-ofbid="d309715e353__20250121171815">同一 PWW 中的两个 action 输出不同占空比。配置不同占空比需要依赖两个 action
在不同时间发生变化：<ol class="- topic/ol ol" type="a" id="pwm_debug_guide__ol_zzr_kxr_sdc" data-ofbid="pwm_debug_guide__ol_zzr_kxr_sdc"><li class="- topic/li li" data-ofbid="d309715e356__20250121171815">在 <code class="+ topic/ph pr-d/codeph ph codeph">config</code> 节点中，配置 PWMx,action0 在 CAU、ZRO
动作，action1 在 CBU、ZRO 动作。</li><li class="- topic/li li" data-ofbid="d309715e361__20250121171815"><p class="- topic/p p" data-ofbid="d309715e362__20250121171815">分别控制 <code class="+ topic/ph pr-d/codeph ph codeph">output0</code> 和
<code class="+ topic/ph pr-d/codeph ph codeph">output1</code>。</p><code class="+ topic/ph pr-d/codeph ph codeph">output0</code> 修改的是
CMPA 寄存器，此处对应 action0，<code class="+ topic/ph pr-d/codeph ph codeph">output1</code> 修改的是 CMPB
寄存器，此处对应 action1<ul class="- topic/ul ul" id="pwm_debug_guide__ul_i53_nxr_sdc" data-ofbid="pwm_debug_guide__ul_i53_nxr_sdc"><li class="- topic/li li" data-ofbid="d309715e377__20250121171815">配置 PWM 输出占空比，例如配置通道 3
的输出占空比：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_tqp_cks_21c" data-ofbid="pwm_debug_guide__codeblock_tqp_cks_21c">echo <span class="hl-string">"3 1000000 800000"</span> &gt; /sys/devices/platform/soc/<span class="hl-number">1924000.</span>pwm/output0</pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_as5_sxr_sdc" data-ofbid="pwm_debug_guide__codeblock_as5_sxr_sdc">echo <span class="hl-string">"3 1000000 200000"</span> &gt; /sys/devices/platform/soc/<span class="hl-number">1924000.</span>pwm/output1</pre></li><li class="- topic/li li" data-ofbid="d309715e383__20250121171815">
<div class="- topic/p p" data-ofbid="d309715e385__20250121171815">配置 EPWM 输出占空比，例如配置通道 0
的输出占空比：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_p3s_cks_21c" data-ofbid="pwm_debug_guide__codeblock_p3s_cks_21c">echo <span class="hl-string">"0 1000000 800000"</span> &gt; /sys/devices/platform/soc/<span class="hl-number">18200000.e</span>pwm/output0</pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_sjk_vxr_sdc" data-ofbid="pwm_debug_guide__codeblock_sjk_vxr_sdc">echo <span class="hl-string">"0 1000000 200000"</span> &gt; /sys/devices/platform/soc/<span class="hl-number">18200000.e</span>pwm/output1</pre></div>
</li></ul></li></ol></div></li><li class="- topic/li li" data-ofbid="d309715e393__20250121171815">
<p class="- topic/p p" data-ofbid="d309715e395__20250121171815">如果需要指定数目的脉冲输出，可以使用以下命令：</p>
<div class="- topic/p p" data-ofbid="d309715e398__20250121171815">以下示例表示配置输出 8 个脉冲：<ul class="- topic/ul ul" id="pwm_debug_guide__ul_i3y_wxr_sdc" data-ofbid="pwm_debug_guide__ul_i3y_wxr_sdc"><li class="- topic/li li" data-ofbid="d309715e401__20250121171815">PWM<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_khx_cks_21c" data-ofbid="pwm_debug_guide__codeblock_khx_cks_21c">echo <span class="hl-string">"3 0 1000000 800000 8"</span> &gt; /sys/devices/platform/soc/<span class="hl-number">1924000.</span>pwm/pulse</pre></li><li class="- topic/li li" data-ofbid="d309715e405__20250121171815">EPWM<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_zwz_cks_21c" data-ofbid="pwm_debug_guide__codeblock_zwz_cks_21c">echo <span class="hl-string">"0 0 1000000 500000 8"</span> &gt; /sys/devices/platform/soc/<span class="hl-number">18200000.e</span>pwm/pulse</pre></li></ul></div>
<div class="- topic/note note note note_note" id="pwm_debug_guide__note_skq_vzr_sdc" data-ofbid="pwm_debug_guide__note_skq_vzr_sdc"><span class="note__title">注：</span> 脉冲输出方向与 <code class="+ topic/ph pr-d/codeph ph codeph">action</code>
配置有关，并且指定脉冲数目输出依赖中断，中断模式需要与 <code class="+ topic/ph pr-d/codeph ph codeph">action</code> 配置相对应，详情可查看<a xml:lang="zh-CN" lang="zh-CN" class="- topic/xref xref" href="pwm_debug.html#pwm_debug_guide__section_b2t_hyr_sdc">脉冲输出方向与 Action 配置</a>和<a xml:lang="zh-CN" lang="zh-CN" class="- topic/xref xref" href="pwm_debug.html#pwm_debug_guide__section_cyc_kzr_sdc">指定脉冲数目输出依赖中断</a></div>
</li></ol>
</div>
</section><section class="- topic/section section" id="pwm_debug_guide__section_xhp_3wr_sdc" data-ofbid="pwm_debug_guide__section_xhp_3wr_sdc"><h2 class="- topic/title title sectiontitle"><span class="+ topic/ph sw-d/filepath ph filepath">config</span> 节点参数描述</h2>
<div class="- topic/p p" data-ofbid="d309715e436__20250121171815"><code class="+ topic/ph pr-d/codeph ph codeph">config</code> 的参数格式定义如下（按从左到右的输入顺序）：<div class="table-container"><table class="- topic/table table frame-all" id="pwm_debug_guide__table_h4j_ljs_21c" data-ofbid="pwm_debug_guide__table_h4j_ljs_21c" data-cols="3"><caption></caption><colgroup><col style="width:22.47191011235955%"/><col style="width:23.370786516853933%"/><col style="width:54.157303370786515%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="pwm_debug_guide__table_h4j_ljs_21c__entry__1">参数名称</th><th class="- topic/entry entry colsep-1 rowsep-1" id="pwm_debug_guide__table_h4j_ljs_21c__entry__2">取值范围</th><th class="- topic/entry entry colsep-0 rowsep-1" id="pwm_debug_guide__table_h4j_ljs_21c__entry__3">含义</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__1">channel No.</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__2">[0, 3]</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__3">通道号</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__1">action No.</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__2">[0, 1]</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__3">0 和 1 分别代表 action0、action1</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__1">mode</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__2">[0, 2]</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__3">0, up-count; 1, down-count; 2, up-down-count</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__1">tb-clk-rate</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__2">[0, 24000000]</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__3">时基计数器的工作时钟</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__1">default level</td><td class="- topic/entry entry colsep-1 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__2">[0, 1]</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__3">初始电平</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__1">CBD</td><td class="- topic/entry entry colsep-1 rowsep-0" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__2" rowspan="6">[0, 3]</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__3" rowspan="6">
<p class="- topic/p p" data-ofbid="d309715e496__20250121171815">0, none;</p>
<p class="- topic/p p" data-ofbid="d309715e499__20250121171815">1, low;</p>
<p class="- topic/p p" data-ofbid="d309715e502__20250121171815">2, high;</p>
<p class="- topic/p p" data-ofbid="d309715e505__20250121171815">3, inverse</p>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__1">CBU</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__1">CAD</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__1">CAU</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__1">PRD</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="pwm_debug_guide__table_h4j_ljs_21c__entry__1">ZRO</td></tr></tbody></table></div></div>
</section><section class="- topic/section section" id="pwm_debug_guide__section_b2t_hyr_sdc" data-ofbid="pwm_debug_guide__section_b2t_hyr_sdc"><h2 class="- topic/title title sectiontitle">脉冲输出方向与 Action 配置</h2>
<p class="- topic/p p" data-ofbid="d309715e529__20250121171815">在 PWM 和 EPWM 中，脉冲输出的方向和行为可以通过配置不同的 <code class="+ topic/ph pr-d/codeph ph codeph">action</code> 来实现。每个
<code class="+ topic/ph pr-d/codeph ph codeph">action</code> 可以独立配置其触发条件、输出电平以及是否产生中断等。</p>
<div class="- topic/p p" data-ofbid="d309715e538__20250121171815">假设需要动态配置一个 PWM 通道，设备路径为
<span class="+ topic/ph sw-d/filepath ph filepath">/sys/devices/platform/soc/1924000.pwm/config</span>，执行下列命令，可配置两个
<code class="+ topic/ph pr-d/codeph ph codeph">action</code>，分别用于控制脉冲输出的方向和行为：<ul class="- topic/ul ul" id="pwm_debug_guide__ul_t4n_qyr_sdc" data-ofbid="pwm_debug_guide__ul_t4n_qyr_sdc"><li class="- topic/li li" data-ofbid="d309715e547__20250121171815">配置 action
0<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_km1_qyr_sdc" data-ofbid="pwm_debug_guide__codeblock_km1_qyr_sdc">echo <span class="hl-string">"0 1 0 24000000 1 0 2 0 0 1 0"</span> &gt; /sys/devices/platform/soc/<span class="hl-number">1924000.</span>pwm/config
</pre></li><li class="- topic/li li" data-ofbid="d309715e551__20250121171815">配置 action
1<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_dw3_qyr_sdc" data-ofbid="pwm_debug_guide__codeblock_dw3_qyr_sdc">echo <span class="hl-string">"1 1 0 24040000 1 0 2 0 0 1 0"</span> &gt; /sys/devices/platform/soc/<span class="hl-number">1924000.</span>pwm/config
</pre></li></ul></div>
</section><section class="- topic/section section" id="pwm_debug_guide__section_cyc_kzr_sdc" data-ofbid="pwm_debug_guide__section_cyc_kzr_sdc"><h2 class="- topic/title title sectiontitle">指定脉冲数目输出依赖中断</h2>
<p class="- topic/p p" data-ofbid="d309715e561__20250121171815">指定脉冲数目输出通常需要配置中断，以便在达到指定的脉冲数时触发中断处理程序。中断模式需要与 <code class="+ topic/ph pr-d/codeph ph codeph">action</code>
配置相对应，以确保正确的事件触发。</p>
<div class="- topic/p p" data-ofbid="d309715e567__20250121171815">以下示例中，配置了一个中断，当计数器达到某个值时触发中断。需要确保中断模式与 <code class="+ topic/ph pr-d/codeph ph codeph">action</code>
配置相匹配。例如：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="pwm_debug_guide__codeblock_chj_mzr_sdc" data-ofbid="pwm_debug_guide__codeblock_chj_mzr_sdc">echo <span class="hl-string">"3 1000000 800000 8"</span> &gt; /sys/devices/platform/soc/<span class="hl-number">1924000.</span>pwm/pulse
</pre><ul class="- topic/ul ul" id="pwm_debug_guide__ul_rq4_qzr_sdc" data-ofbid="pwm_debug_guide__ul_rq4_qzr_sdc"><li class="- topic/li li" data-ofbid="d309715e575__20250121171815">
<p class="- topic/p p" data-ofbid="d309715e577__20250121171815"><code class="+ topic/ph pr-d/codeph ph codeph">mode</code> 设置为 <code class="+ topic/ph pr-d/codeph ph codeph">3</code>，表示 TBCTR=CMPB
且计数器正在递减时触发事件。确保与 <code class="+ topic/ph pr-d/codeph ph codeph">action</code> 的配置相匹配。</p>
</li><li class="- topic/li li" data-ofbid="d309715e588__20250121171815">
<div class="- topic/p p" data-ofbid="d309715e590__20250121171815"><code class="+ topic/ph pr-d/codeph ph codeph">mode</code> 取值范围如下：<ul class="- topic/ul ul" id="pwm_debug_guide__ul_o4j_ljs_21c" data-ofbid="pwm_debug_guide__ul_o4j_ljs_21c"><li class="- topic/li li" data-ofbid="d309715e595__20250121171815">
<p class="- topic/p p" data-ofbid="d309715e597__20250121171815">0: TBCTR=CMPA 且计数器正在递增时触发事件</p>
</li><li class="- topic/li li" data-ofbid="d309715e600__20250121171815">
<p class="- topic/p p" data-ofbid="d309715e602__20250121171815">1: TBCTR=CMPA 且计数器正在递减时触发事件</p>
</li><li class="- topic/li li" data-ofbid="d309715e605__20250121171815">
<p class="- topic/p p" data-ofbid="d309715e607__20250121171815">2: TBCTR=CMPB 且计数器正在递增时触发事件</p>
</li><li class="- topic/li li" data-ofbid="d309715e610__20250121171815">
<p class="- topic/p p" data-ofbid="d309715e612__20250121171815">3: TBCTR=CMPB 且计数器正在递减时触发事件</p>
</li></ul></div>
</li></ul></div>
</section></div></article></main></div>
</div>
<nav role="navigation" id="wh_topic_toc" aria-label="On this page" class="col-lg-2 d-none d-lg-block navbar d-print-none">
<div id="wh_topic_toc_content">
<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="#pwm_debug_guide__section_tnj_ljs_21c" data-tocid="pwm_debug_guide__section_tnj_ljs_21c">调试开关</a></div></li><li class="section-item"><div class="section-title"><a href="#pwm_debug_guide__section_ynj_ljs_21c" data-tocid="pwm_debug_guide__section_ynj_ljs_21c">查看 Sysfs 中的状态信息</a></div></li><li class="section-item"><div class="section-title"><a href="#pwm_debug_guide__section_zvv_b5r_sdc" data-tocid="pwm_debug_guide__section_zvv_b5r_sdc">查看 Sysfs 中的背光设置</a></div></li><li class="section-item"><div class="section-title"><a href="#pwm_debug_guide__section_czn_c5r_sdc" data-tocid="pwm_debug_guide__section_czn_c5r_sdc">动态配置 PWM 通道</a></div></li><li class="section-item"><div class="section-title"><a href="#pwm_debug_guide__section_xhp_3wr_sdc" data-tocid="pwm_debug_guide__section_xhp_3wr_sdc"><span class="+ topic/ph sw-d/filepath ph filepath">config</span> 节点参数描述</a></div></li><li class="section-item"><div class="section-title"><a href="#pwm_debug_guide__section_b2t_hyr_sdc" data-tocid="pwm_debug_guide__section_b2t_hyr_sdc">脉冲输出方向与 Action 配置</a></div></li><li class="section-item"><div class="section-title"><a href="#pwm_debug_guide__section_cyc_kzr_sdc" data-tocid="pwm_debug_guide__section_cyc_kzr_sdc">指定脉冲数目输出依赖中断</a></div></li></ul></div>
</div>
</nav>
</div>
</div>
</div>
<footer class="navbar navbar-default wh_footer">
<div class=" footer-container mx-auto ">
<title>footer def</title>
<style><!--
.p1 {
font-family: FangZhengShuSong, Times, serif;
}
.p2 {
font-family: Arial, Helvetica, sans-serif;
}
.p3 {
font-family: "Lucida Console", "Courier New", monospace;
}
--></style>
<div class="webhelp.fragment.footer">
<p class="p1">Copyright © 2019-2024 广东匠芯创科技有限公司. All rights reserved.</p>
</div><div>
<div class="generation_time">
Update Time: 2025-01-21
</div>
</div>
</div>
</footer>
<div id="go2top" class="d-print-none">
<span class="oxy-icon oxy-icon-up"></span>
</div>
<div id="modal_img_large" class="modal">
<span class="close oxy-icon oxy-icon-remove"></span>
<div id="modal_img_container"></div>
<div id="caption"></div>
</div>
<script src="${pd}/publishing/publishing-styles-AIC-template/js/custom.js" defer="defer"></script>
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink