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id="spi-d3752e6475-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-d3752e6561" class="topicref" data-id="uart_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action uart_user_guide-d3752e6561-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/uart/uart_user_guide.html" id="uart_user_guide-d3752e6561-link">UART 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="usb_user_guide-d3752e6645" class="topicref" data-id="usb_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action usb_user_guide-d3752e6645-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/usb/usb_user_guide.html" id="usb_user_guide-d3752e6645-link">USB 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d3752e6715" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d3752e6715-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/mac/mac_user_guide.html" id="id-d3752e6715-link">MAC 使用指南</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-safety-d3752e6799" class="topicref" data-id="chapter-safety" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-safety-d3752e6799-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-safety-sdk.html" id="chapter-safety-d3752e6799-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">16 May 2025</div><div style="color: gray;">
|
||
Read time: 3 minute(s)
|
||
</div>
|
||
<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="d150620e33__20250519091521">
|
||
<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="d150620e37__20250519091521">
|
||
<p class="- topic/p p" data-ofbid="d150620e39__20250519091521">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="d150620e49__20250519091521">
|
||
<div class="- topic/p p" data-ofbid="d150620e51__20250519091521">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="d150620e58__20250519091521">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="d150620e66__20250519091521">
|
||
<p class="- topic/p p" data-ofbid="d150620e68__20250519091521">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="d150620e82__20250519091521">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="d150620e97__20250519091521">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="d150620e115__20250519091521">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="d150620e119__20250519091521">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="d150620e123__20250519091521">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="d150620e127__20250519091521">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="d150620e137__20250519091521">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="d150620e141__20250519091521">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="d150620e145__20250519091521">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="d150620e149__20250519091521">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="d150620e156__20250519091521">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="d150620e160__20250519091521">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="d150620e164__20250519091521">[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="d150620e168__20250519091521">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="d150620e175__20250519091521">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="d150620e179__20250519091521">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="d150620e183__20250519091521">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="d150620e187__20250519091521">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="d150620e194__20250519091521">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="d150620e198__20250519091521">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="d150620e202__20250519091521">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="d150620e206__20250519091521">多个关键时点的触发行为</p></td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<p class="- topic/p p" data-ofbid="d150620e213__20250519091521">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="d150620e230__20250519091521">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="d150620e234__20250519091521">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="d150620e244__20250519091521">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="d150620e248__20250519091521">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="d150620e255__20250519091521">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="d150620e259__20250519091521">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="d150620e266__20250519091521">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="d150620e270__20250519091521">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="d150620e277__20250519091521">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="d150620e281__20250519091521">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="d150620e289__20250519091521">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="d150620e323__20250519091521">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="d150620e327__20250519091521">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="d150620e331__20250519091521">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="d150620e335__20250519091521">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="d150620e339__20250519091521">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="d150620e344__20250519091521">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="d150620e348__20250519091521">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="d150620e352__20250519091521">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="d150620e357__20250519091521">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="d150620e369__20250519091521">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="d150620e374__20250519091521">-</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="d150620e378__20250519091521">-</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="d150620e382__20250519091521">-</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="d150620e386__20250519091521">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="d150620e391__20250519091521">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="d150620e395__20250519091521">-</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="d150620e399__20250519091521">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="d150620e403__20250519091521">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="d150620e410__20250519091521">-</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="d150620e414__20250519091521">-</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="d150620e418__20250519091521">-</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="d150620e422__20250519091521">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="d150620e426__20250519091521">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="d150620e431__20250519091521">-</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="d150620e435__20250519091521">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="d150620e439__20250519091521">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="d150620e446__20250519091521">-</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="d150620e450__20250519091521">-</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="d150620e454__20250519091521">-</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="d150620e458__20250519091521">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="d150620e462__20250519091521">-</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="d150620e467__20250519091521">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="d150620e471__20250519091521">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="d150620e475__20250519091521">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="d150620e482__20250519091521">-</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="d150620e486__20250519091521">-</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="d150620e490__20250519091521">-</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="d150620e494__20250519091521">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="d150620e498__20250519091521">-</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="d150620e503__20250519091521">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="d150620e507__20250519091521">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="d150620e511__20250519091521">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="d150620e519__20250519091521">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="d150620e524__20250519091521">-</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="d150620e528__20250519091521">-</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="d150620e532__20250519091521">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="d150620e536__20250519091521">-</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="d150620e541__20250519091521">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="d150620e545__20250519091521">-</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="d150620e549__20250519091521">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="d150620e553__20250519091521">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="d150620e561__20250519091521">-</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="d150620e565__20250519091521">-</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="d150620e569__20250519091521">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="d150620e573__20250519091521">-</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="d150620e577__20250519091521">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="d150620e582__20250519091521">-</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="d150620e586__20250519091521">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="d150620e590__20250519091521">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="d150620e597__20250519091521">-</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="d150620e601__20250519091521">-</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="d150620e605__20250519091521">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="d150620e609__20250519091521">-</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="d150620e613__20250519091521">-</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="d150620e618__20250519091521">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="d150620e622__20250519091521">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="d150620e626__20250519091521">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="d150620e633__20250519091521">-</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="d150620e637__20250519091521">-</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="d150620e641__20250519091521">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="d150620e645__20250519091521">-</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="d150620e649__20250519091521">-</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="d150620e654__20250519091521">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="d150620e658__20250519091521">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="d150620e662__20250519091521">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="d150620e670__20250519091521">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="d150620e675__20250519091521">-</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="d150620e679__20250519091521">-</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="d150620e683__20250519091521">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="d150620e687__20250519091521">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="d150620e692__20250519091521">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="d150620e696__20250519091521">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="d150620e700__20250519091521">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="d150620e704__20250519091521">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="d150620e711__20250519091521">-</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="d150620e715__20250519091521">-</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="d150620e719__20250519091521">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="d150620e723__20250519091521">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="d150620e727__20250519091521">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="d150620e732__20250519091521">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="d150620e736__20250519091521">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="d150620e740__20250519091521">负占空比</p></td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<p class="- topic/p p" data-ofbid="d150620e747__20250519091521">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="d150620e757__20250519091521">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="d150620e772__20250519091521">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="d150620e790__20250519091521">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="d150620e794__20250519091521">
|
||
<p class="- topic/p p" data-ofbid="d150620e796__20250519091521">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="d150620e803__20250519091521">
|
||
<p class="- topic/p p" data-ofbid="d150620e805__20250519091521">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>
|
||
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<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>
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</div>
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</nav>
|
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</div>
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</div>
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</div>
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<footer class="navbar navbar-default wh_footer">
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||
<div class=" footer-container mx-auto ">
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||
<title>footer def</title>
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||
<style>
|
||
.p1 {
|
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font-family: FangZhengShuSong, Times, serif;
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||
}
|
||
.p2 {
|
||
font-family: Arial, Helvetica, sans-serif;
|
||
}
|
||
.p3 {
|
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font-family: "Lucida Console", "Courier New", monospace;
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}
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</style>
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<div class="webhelp.fragment.footer">
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<p class="p1">Copyright © 2019-2025 广东匠芯创科技有限公司. All rights reserved.</p>
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</div>
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||
<div>
|
||
<div class="generation_time">
|
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Update Time: 2025-05-19
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</div>
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</div>
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</div>
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</footer>
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<div id="go2top" class="d-print-none">
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<span class="oxy-icon oxy-icon-up"></span>
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</div>
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<div id="modal_img_large" class="modal">
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<span class="close oxy-icon oxy-icon-remove"></span>
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<div id="modal_img_container"></div>
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<div id="caption"></div>
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</div>
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<script src="${pd}/publishing/publishing-styles-AIC-template/js/custom.js" defer="defer"></script>
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|
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</body>
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</html> |