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id="spi-d3703e6352-link"><span class="ph">Q</span>SPI 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="uart_user_guide-d3703e6438" class="topicref" data-id="uart_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action uart_user_guide-d3703e6438-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/uart/uart_user_guide.html" id="uart_user_guide-d3703e6438-link">UART 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="usb_user_guide-d3703e6522" class="topicref" data-id="usb_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action usb_user_guide-d3703e6522-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/usb/usb_user_guide.html" id="usb_user_guide-d3703e6522-link">USB 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d3703e6592" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d3703e6592-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/mac/mac_user_guide.html" id="id-d3703e6592-link">MAC 使用指南</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-safety-d3703e6676" class="topicref" data-id="chapter-safety" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-safety-d3703e6676-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-safety-sdk.html" id="chapter-safety-d3703e6676-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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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" role="article" aria-labelledby="ariaid-title1">
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<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://aicdocco/taskstopics/sdk/pwm/pwm_config_lite.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">参数配置</h1>
|
||
<div class="date inPage">9 Apr 2025</div><div style="color: gray;">
|
||
Read time: 3 minute(s)
|
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</div>
|
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<div class="- topic/body body">
|
||
<section class="- topic/section section" id="id__section_mrf_pzy_gdc" data-ofbid="id__section_mrf_pzy_gdc"><h2 class="- topic/title title sectiontitle">驱动配置</h2>
|
||
|
||
<div class="- topic/p p" data-ofbid="d148875e33__20250409171047">
|
||
<ol class="- topic/ol ol arabic simple" id="id__ol_kg3_pzy_gdc" data-ofbid="id__ol_kg3_pzy_gdc">
|
||
<li class="- topic/li li" data-ofbid="d148875e37__20250409171047">
|
||
<p class="- topic/p p" data-ofbid="d148875e39__20250409171047">在 <span class="- topic/ph ph">Luban-Lite</span> 根目录下执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">scons --menuconfig</span>，进入
|
||
menuconfig 的功能配置界面。</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d148875e49__20250409171047">
|
||
<div class="- topic/p p" data-ofbid="d148875e51__20250409171047">选择需要的 pwm/epwm 通道。以下以打开 PWM3
|
||
作为示例：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_v4f_z2p_rdc" data-ofbid="id__codeblock_v4f_z2p_rdc">Board options --->
|
||
[ ] Using PWM0
|
||
[ ] Using PWM1
|
||
[ ] Using PWM2
|
||
[*] Using PWM3
|
||
Using EPWM --->
|
||
[ ] Using EPWM0
|
||
[ ] Using EPWM1
|
||
[ ] Using EPWM2
|
||
[ ] Using EPWM3
|
||
[ ] Using EPWM4
|
||
[ ] Using EPWM5</pre></div>
|
||
<div class="- topic/note note tip note_tip" id="id__note_uyl_qn3_ddc" data-ofbid="id__note_uyl_qn3_ddc"><span class="note__title">提示：</span>
|
||
<p class="- topic/p p" data-ofbid="d148875e58__20250409171047">为了简化使用，打开 <span class="+ topic/ph ui-d/uicontrol ph uicontrol">Using PWMx/EPWMx</span> 会自动打开 RT-Thread 的
|
||
PWM 设备驱动框架。</p>
|
||
</div>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d148875e66__20250409171047">
|
||
<p class="- topic/p p" data-ofbid="d148875e68__20250409171047">在 menuconfig 界面中打开 RT-Thread 的 PWM 设备驱动框架。 使用 RT-Thread 内核的时，PWM/EPWM
|
||
驱动需要依赖 RT-Thread 的 PWM 设备驱动框架。</p>
|
||
</li>
|
||
</ol>
|
||
</div>
|
||
</section>
|
||
<section class="- topic/section section" id="id__section_hbv_pzy_gdc" data-ofbid="id__section_hbv_pzy_gdc"><h2 class="- topic/title title sectiontitle">PWM 自定义参数</h2>
|
||
|
||
<div class="- topic/div div section" id="id__pwm">
|
||
<p class="- topic/p p" data-ofbid="d148875e82__20250409171047">PWM 驱动在 <span class="+ topic/ph sw-d/filepath ph filepath">drv_pwm.c</span> 中提供了一个接口
|
||
<code class="+ topic/ph pr-d/codeph ph codeph">aic_pwm_default_action()</code> 来配置 PWM 各通道的行为参数（EPWM 驱动的接口是
|
||
<span class="+ topic/ph sw-d/filepath ph filepath">drv_pwm.c</span> 中的 <code class="+ topic/ph pr-d/codeph ph codeph">aic_epwm_default_action()</code>
|
||
）。</p>
|
||
<p class="- topic/p p" data-ofbid="d148875e97__20250409171047">如果因为板级硬件设计的差异，和实际应用场景不同，可以对这些参数进行调整。参数的定义如下表：</p>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="id__table_wjc_qzy_gdc" data-ofbid="id__table_wjc_qzy_gdc" data-cols="4"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 1</span><span class="table--title-label-punctuation">. </span></span><span class="table--title"></span></caption><colgroup><col/><col/><col/><col/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_wjc_qzy_gdc__entry__1"><p class="- topic/p p" data-ofbid="d148875e115__20250409171047">参数名称</p></th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_wjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e119__20250409171047">类型</p></th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_wjc_qzy_gdc__entry__3"><p class="- topic/p p" data-ofbid="d148875e123__20250409171047">取值范围</p></th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_wjc_qzy_gdc__entry__4"><p class="- topic/p p" data-ofbid="d148875e127__20250409171047">功能说明</p></th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_wjc_qzy_gdc__entry__1"><p class="- topic/p p" data-ofbid="d148875e137__20250409171047">mode</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_wjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e141__20250409171047">enum</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_wjc_qzy_gdc__entry__3"><p class="- topic/p p" data-ofbid="d148875e145__20250409171047">up/down/up-down-count</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_wjc_qzy_gdc__entry__4"><p class="- topic/p p" data-ofbid="d148875e149__20250409171047">配置增减模式</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_wjc_qzy_gdc__entry__1"><p class="- topic/p p" data-ofbid="d148875e156__20250409171047">default-level</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_wjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e160__20250409171047">正整数</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_wjc_qzy_gdc__entry__3"><p class="- topic/p p" data-ofbid="d148875e164__20250409171047">[0, 1]</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_wjc_qzy_gdc__entry__4"><p class="- topic/p p" data-ofbid="d148875e168__20250409171047">默认/初始电平</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_wjc_qzy_gdc__entry__1"><p class="- topic/p p" data-ofbid="d148875e175__20250409171047">action0</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_wjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e179__20250409171047">数据结构</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_wjc_qzy_gdc__entry__3"><p class="- topic/p p" data-ofbid="d148875e183__20250409171047">配置 CAD、CAU 等行为</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_wjc_qzy_gdc__entry__4"><p class="- topic/p p" data-ofbid="d148875e187__20250409171047">多个关键时点的触发行为</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_wjc_qzy_gdc__entry__1"><p class="- topic/p p" data-ofbid="d148875e194__20250409171047">action1</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_wjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e198__20250409171047">数据结构</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_wjc_qzy_gdc__entry__3"><p class="- topic/p p" data-ofbid="d148875e202__20250409171047">配置 CAD、CAU 等行为</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_wjc_qzy_gdc__entry__4"><p class="- topic/p p" data-ofbid="d148875e206__20250409171047">多个关键时点的触发行为</p></td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<p class="- topic/p p" data-ofbid="d148875e213__20250409171047">表中 action0 和 action1 会涉及 4 种行为类型，定义如下：</p>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="id__table_xjc_qzy_gdc" data-ofbid="id__table_xjc_qzy_gdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 2</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">Action 类型及其行为</span></caption><colgroup><col/><col/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_xjc_qzy_gdc__entry__1"><p class="- topic/p p" data-ofbid="d148875e230__20250409171047">Action 类型</p></th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_xjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e234__20250409171047">行为描述</p></th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_xjc_qzy_gdc__entry__1"><p class="- topic/p p" data-ofbid="d148875e244__20250409171047">PWM_ACT_NONE/EPWM_ACT_NONE</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_xjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e248__20250409171047">不做任何变化，保持之前的输出电平</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_xjc_qzy_gdc__entry__1"><p class="- topic/p p" data-ofbid="d148875e255__20250409171047">PWM_ACT_LOW/EPWM_ACT_LOW</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_xjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e259__20250409171047">跳变为 0 电平</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_xjc_qzy_gdc__entry__1"><p class="- topic/p p" data-ofbid="d148875e266__20250409171047">PWM_ACT_HIGH/EPWM_ACT_HIGH</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_xjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e270__20250409171047">跳变为 1 电平</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_xjc_qzy_gdc__entry__1"><p class="- topic/p p" data-ofbid="d148875e277__20250409171047">PWM_ACT_INVERSE/EPWM_ACT_INVERSE</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_xjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e281__20250409171047">跳变为反向的电平，比如从 0 跳变为 1</p></td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<p class="- topic/p p" data-ofbid="d148875e289__20250409171047">以下是一些典型的参数组合，可参考：</p>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="id__table_yjc_qzy_gdc" data-ofbid="id__table_yjc_qzy_gdc" data-cols="9"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 3</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">典型参数组合</span></caption><colgroup><col style="width:12.973667308927425%"/><col style="width:6.74373795761079%"/><col style="width:6.422607578676942%"/><col style="width:8.413615928066795%"/><col style="width:7.964033397559408%"/><col style="width:8.413615928066795%"/><col style="width:8.028259473346179%"/><col style="width:10.918432883750802%"/><col style="width:30.122029543994866%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_yjc_qzy_gdc__entry__1"><p class="- topic/p p" data-ofbid="d148875e323__20250409171047">Mode</p></th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_yjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e327__20250409171047">CBD</p></th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_yjc_qzy_gdc__entry__3"><p class="- topic/p p" data-ofbid="d148875e331__20250409171047">CBU</p></th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_yjc_qzy_gdc__entry__4"><p class="- topic/p p" data-ofbid="d148875e335__20250409171047">CAD</p></th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_yjc_qzy_gdc__entry__5"><p class="- topic/p p" data-ofbid="d148875e339__20250409171047">CAU</p></th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_yjc_qzy_gdc__entry__6"><p class="- topic/p p" data-ofbid="d148875e344__20250409171047">PRD</p></th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_yjc_qzy_gdc__entry__7"><p class="- topic/p p" data-ofbid="d148875e348__20250409171047">ZRO</p></th>
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_yjc_qzy_gdc__entry__8"><p class="- topic/p p" data-ofbid="d148875e352__20250409171047">Def level</p></th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_yjc_qzy_gdc__entry__9">
|
||
<p class="- topic/p p" data-ofbid="d148875e357__20250409171047">本 SoC 测试结果</p>
|
||
</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__1" rowspan="4">
|
||
<p class="- topic/p p" data-ofbid="d148875e369__20250409171047">Up count</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e374__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__3"><p class="- topic/p p" data-ofbid="d148875e378__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__4"><p class="- topic/p p" data-ofbid="d148875e382__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__5"><p class="- topic/p p" data-ofbid="d148875e386__20250409171047">high</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__6"><p class="- topic/p p" data-ofbid="d148875e391__20250409171047">low</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__7"><p class="- topic/p p" data-ofbid="d148875e395__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__8"><p class="- topic/p p" data-ofbid="d148875e399__20250409171047">1</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__9"><p class="- topic/p p" data-ofbid="d148875e403__20250409171047">负占空比</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e410__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__3"><p class="- topic/p p" data-ofbid="d148875e414__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__4"><p class="- topic/p p" data-ofbid="d148875e418__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__5"><p class="- topic/p p" data-ofbid="d148875e422__20250409171047">low</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__6"><p class="- topic/p p" data-ofbid="d148875e426__20250409171047">high</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__7"><p class="- topic/p p" data-ofbid="d148875e431__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__8"><p class="- topic/p p" data-ofbid="d148875e435__20250409171047">0</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__9"><p class="- topic/p p" data-ofbid="d148875e439__20250409171047">正占空比（默认）</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e446__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__3"><p class="- topic/p p" data-ofbid="d148875e450__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__4"><p class="- topic/p p" data-ofbid="d148875e454__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__5"><p class="- topic/p p" data-ofbid="d148875e458__20250409171047">high</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__6"><p class="- topic/p p" data-ofbid="d148875e462__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__7"><p class="- topic/p p" data-ofbid="d148875e467__20250409171047">high</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__8"><p class="- topic/p p" data-ofbid="d148875e471__20250409171047">1</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__9"><p class="- topic/p p" data-ofbid="d148875e475__20250409171047">负占空比</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e482__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__3"><p class="- topic/p p" data-ofbid="d148875e486__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__4"><p class="- topic/p p" data-ofbid="d148875e490__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__5"><p class="- topic/p p" data-ofbid="d148875e494__20250409171047">low</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__6"><p class="- topic/p p" data-ofbid="d148875e498__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__7"><p class="- topic/p p" data-ofbid="d148875e503__20250409171047">low</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__8"><p class="- topic/p p" data-ofbid="d148875e507__20250409171047">0</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__9"><p class="- topic/p p" data-ofbid="d148875e511__20250409171047">正占空比</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__1" rowspan="4">
|
||
<p class="- topic/p p" data-ofbid="d148875e519__20250409171047">Down count</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e524__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__3"><p class="- topic/p p" data-ofbid="d148875e528__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__4"><p class="- topic/p p" data-ofbid="d148875e532__20250409171047">high</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__5"><p class="- topic/p p" data-ofbid="d148875e536__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__6"><p class="- topic/p p" data-ofbid="d148875e541__20250409171047">low</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__7"><p class="- topic/p p" data-ofbid="d148875e545__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__8"><p class="- topic/p p" data-ofbid="d148875e549__20250409171047">0</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__9"><p class="- topic/p p" data-ofbid="d148875e553__20250409171047">正占空比</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e561__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__3"><p class="- topic/p p" data-ofbid="d148875e565__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__4"><p class="- topic/p p" data-ofbid="d148875e569__20250409171047">low</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__5"><p class="- topic/p p" data-ofbid="d148875e573__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__6"><p class="- topic/p p" data-ofbid="d148875e577__20250409171047">high</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__7"><p class="- topic/p p" data-ofbid="d148875e582__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__8"><p class="- topic/p p" data-ofbid="d148875e586__20250409171047">1</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__9"><p class="- topic/p p" data-ofbid="d148875e590__20250409171047">负占空比</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e597__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__3"><p class="- topic/p p" data-ofbid="d148875e601__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__4"><p class="- topic/p p" data-ofbid="d148875e605__20250409171047">high</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__5"><p class="- topic/p p" data-ofbid="d148875e609__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__6"><p class="- topic/p p" data-ofbid="d148875e613__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__7"><p class="- topic/p p" data-ofbid="d148875e618__20250409171047">low</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__8"><p class="- topic/p p" data-ofbid="d148875e622__20250409171047">0</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__9"><p class="- topic/p p" data-ofbid="d148875e626__20250409171047">正占空比</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e633__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__3"><p class="- topic/p p" data-ofbid="d148875e637__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__4"><p class="- topic/p p" data-ofbid="d148875e641__20250409171047">low</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__5"><p class="- topic/p p" data-ofbid="d148875e645__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__6"><p class="- topic/p p" data-ofbid="d148875e649__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__7"><p class="- topic/p p" data-ofbid="d148875e654__20250409171047">high</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__8"><p class="- topic/p p" data-ofbid="d148875e658__20250409171047">1</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__9"><p class="- topic/p p" data-ofbid="d148875e662__20250409171047">负占空比</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_yjc_qzy_gdc__entry__1" rowspan="2">
|
||
<p class="- topic/p p" data-ofbid="d148875e670__20250409171047">Up-Down count</p>
|
||
</td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e675__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__3"><p class="- topic/p p" data-ofbid="d148875e679__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__4"><p class="- topic/p p" data-ofbid="d148875e683__20250409171047">high</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__5"><p class="- topic/p p" data-ofbid="d148875e687__20250409171047">low</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__6"><p class="- topic/p p" data-ofbid="d148875e692__20250409171047">low</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__7"><p class="- topic/p p" data-ofbid="d148875e696__20250409171047">high</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__8"><p class="- topic/p p" data-ofbid="d148875e700__20250409171047">0</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_yjc_qzy_gdc__entry__9"><p class="- topic/p p" data-ofbid="d148875e704__20250409171047">正占空比</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_yjc_qzy_gdc__entry__2"><p class="- topic/p p" data-ofbid="d148875e711__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_yjc_qzy_gdc__entry__3"><p class="- topic/p p" data-ofbid="d148875e715__20250409171047">-</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_yjc_qzy_gdc__entry__4"><p class="- topic/p p" data-ofbid="d148875e719__20250409171047">low</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_yjc_qzy_gdc__entry__5"><p class="- topic/p p" data-ofbid="d148875e723__20250409171047">high</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_yjc_qzy_gdc__entry__6"><p class="- topic/p p" data-ofbid="d148875e727__20250409171047">high</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_yjc_qzy_gdc__entry__7"><p class="- topic/p p" data-ofbid="d148875e732__20250409171047">low</p></td>
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_yjc_qzy_gdc__entry__8"><p class="- topic/p p" data-ofbid="d148875e736__20250409171047">1</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_yjc_qzy_gdc__entry__9"><p class="- topic/p p" data-ofbid="d148875e740__20250409171047">负占空比</p></td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<p class="- topic/p p" data-ofbid="d148875e747__20250409171047">其中，“正占空比”和“负占空比” 的意思是指当通过 Backlight 节点设置背光亮度时，得到的占空比结果是正向、还是反向的。</p>
|
||
</div>
|
||
</section>
|
||
<section class="- topic/section section" id="id__section_lhg_fyn_4dc" data-ofbid="id__section_lhg_fyn_4dc"><h2 class="- topic/title title sectiontitle">时钟配置</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d148875e757__20250409171047">PWM 模块涉及时钟的衍生关系：</p>
|
||
<figure class="- topic/fig fig fignone" id="id__fig_xy3_1js_21c" data-ofbid="id__fig_xy3_1js_21c">
|
||
|
||
<br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_sxm_lbp_g1c" src="../../../reusables/reused-topics/../../images/pwm/pwm_clk_tree.png" width="480" alt="pwm_clk_tree"/></div><br/>
|
||
<figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 1</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">PWM 模块的时钟衍生关系图</span></figcaption></figure>
|
||
<p class="- topic/p p" data-ofbid="d148875e772__20250409171047">EWM 模块涉及时钟的衍生关系：</p>
|
||
<figure class="- topic/fig fig fignone" id="id__fig_bct_z3s_21c" data-ofbid="id__fig_bct_z3s_21c">
|
||
|
||
<br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_y4x_lbp_g1c" src="../../../reusables/reused-topics/../../images/pwmcs/epwm_clk_tree.png" width="480" alt="epwm_clk_tree"/></div><br/>
|
||
<figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 2</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">EPWM 模块的时钟衍生关系图</span></figcaption></figure>
|
||
|
||
<div class="- topic/note note note note_note" id="id__note_rkx_1js_21c" data-ofbid="id__note_rkx_1js_21c"><span class="note__title">注：</span>
|
||
<div class="- topic/p p" data-ofbid="d148875e790__20250409171047">容易混淆的 sysclk：<ul class="- topic/ul ul" id="id__ul_rqy_23s_21c" data-ofbid="id__ul_rqy_23s_21c">
|
||
<li class="- topic/li li" data-ofbid="d148875e794__20250409171047">
|
||
<p class="- topic/p p" data-ofbid="d148875e796__20250409171047">PWM 驱动中，按照惯例将父时钟称作 <span class="+ topic/keyword pr-d/parmname keyword parmname">sysclk</span>，即上图的 PLL INT1。</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d148875e803__20250409171047">
|
||
<p class="- topic/p p" data-ofbid="d148875e805__20250409171047">PWM 硬件 spec 中，将上图中的 PWM Clk 称作 <span class="+ topic/keyword pr-d/parmname keyword parmname">sysclk</span>。</p>
|
||
</li>
|
||
</ul></div>
|
||
</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">
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||
<div id="wh_topic_toc_content">
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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="#id__section_mrf_pzy_gdc" data-tocid="id__section_mrf_pzy_gdc">驱动配置</a></div></li><li class="section-item"><div class="section-title"><a href="#id__section_hbv_pzy_gdc" data-tocid="id__section_hbv_pzy_gdc">PWM 自定义参数</a></div></li><li class="section-item"><div class="section-title"><a href="#id__section_lhg_fyn_4dc" data-tocid="id__section_lhg_fyn_4dc">时钟配置</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 © 2019-2025 广东匠芯创科技有限公司. All rights reserved.</p>
|
||
</div>
|
||
<div>
|
||
<div class="generation_time">
|
||
Update Time: 2025-04-09
|
||
</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> |