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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" 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/watchdog/watchdog-design-lite.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">设计说明</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 1 minute(s)
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</div><div class="- topic/body body"><section class="- topic/section section" id="id__id2" data-ofbid="id__id2"><h2 class="- topic/title title sectiontitle">源码说明</h2>
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<p class="- topic/p p" data-ofbid="d153679e24__20250121171614">源代码位于 <code class="+ topic/ph pr-d/codeph ph codeph">bsp/artinchip/</code>：</p>
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<ul class="- topic/ul ul simple" id="id__ul_wk1_kxh_bdc" data-ofbid="id__ul_wk1_kxh_bdc"><li class="- topic/li li" data-ofbid="d153679e31__20250121171614">
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<p class="- topic/p p" data-ofbid="d153679e33__20250121171614"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/drv/wdt/drv_wdt.c</span>，WDT Driver 层实现</p>
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</li><li class="- topic/li li" data-ofbid="d153679e38__20250121171614">
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<p class="- topic/p p" data-ofbid="d153679e40__20250121171614"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/hal/wdt/hal_wdt.c</span>，WDT HAL 层实现</p>
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</li><li class="- topic/li li" data-ofbid="d153679e45__20250121171614">
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<p class="- topic/p p" data-ofbid="d153679e47__20250121171614"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/include/hal/hal_wdt.h</span>，WDT HAL 层接口头文件</p>
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</li><li class="- topic/li li" data-ofbid="d153679e52__20250121171614">
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<p class="- topic/p p" data-ofbid="d153679e54__20250121171614"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/include/drv/aic_drv_wdt.h</span>，WDT DRV 层头文件</p>
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</li></ul>
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</section><section class="- topic/section section" id="id__id3" data-ofbid="id__id3"><h2 class="- topic/title title sectiontitle">模块架构</h2>
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<p class="- topic/p p" data-ofbid="d153679e65__20250121171614">WDT 驱动 Driver 层采用 RT-Thread 的 Watchdog 设备驱动框架，如果只使用 HAL 层也可以支持 baremetal 方式的应用场景。</p>
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<figure class="- topic/fig fig fignone" id="id__id7" data-ofbid="id__id7"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_xk1_kxh_bdc" src="../../../images/watchdog/sw_system3.png" width="288" alt="sw_system3"/></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">Watchdog 驱动的软件架构图</span></figcaption></figure>
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<p class="- topic/p p" data-ofbid="d153679e77__20250121171614">针对 Watchdog 控制器的几个特色功能：</p>
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<ol class="- topic/ol ol arabic simple" id="id__ol_yk1_kxh_bdc" data-ofbid="id__ol_yk1_kxh_bdc"><li class="- topic/li li" data-ofbid="d153679e82__20250121171614">
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<dl class="- topic/dl dl simple" id="id__dl_zk1_kxh_bdc" data-ofbid="id__dl_zk1_kxh_bdc"><dt class="- topic/dt dt dlterm" data-ofbid="d153679e86__20250121171614">多通道</dt><dd class="- topic/dd dd">
|
||
<p class="- topic/p p" data-ofbid="d153679e90__20250121171614">暂时只提供一个 Watchdog 设备（对应通道 0）。</p>
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</dd></dl>
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</li><li class="- topic/li li" data-ofbid="d153679e94__20250121171614">
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<dl class="- topic/dl dl simple" id="id__dl_al1_kxh_bdc" data-ofbid="id__dl_al1_kxh_bdc"><dt class="- topic/dt dt dlterm" data-ofbid="d153679e98__20250121171614">超时中断</dt><dd class="- topic/dd dd">
|
||
<p class="- topic/p p" data-ofbid="d153679e102__20250121171614">在 Watchdog 超时之前可以产生一些中断信号，让软件有机会做一些预处理。</p>
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||
</dd></dl>
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</li><li class="- topic/li li" data-ofbid="d153679e106__20250121171614">
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<dl class="- topic/dl dl simple" id="id__dl_bl1_kxh_bdc" data-ofbid="id__dl_bl1_kxh_bdc"><dt class="- topic/dt dt dlterm" data-ofbid="d153679e110__20250121171614">清零窗口</dt><dd class="- topic/dd dd">
|
||
<p class="- topic/p p" data-ofbid="d153679e114__20250121171614">清零窗口设置范围为 0~3，看门狗在设置范围内不能 clean 计数。</p>
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</dd></dl>
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</li><li class="- topic/li li" data-ofbid="d153679e118__20250121171614">
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<dl class="- topic/dl dl simple" id="id__dl_cl1_kxh_bdc" data-ofbid="id__dl_cl1_kxh_bdc"><dt class="- topic/dt dt dlterm" data-ofbid="d153679e122__20250121171614"> 调试模式的计数状态</dt><dd class="- topic/dd dd">
|
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<p class="- topic/p p" data-ofbid="d153679e126__20250121171614"> 当 CPU 进入 Jtag 的 debug 状态时，Watchdog
|
||
计数可以选择是否暂停。暂未提供设置接口，默认是暂停。</p>
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</dd></dl>
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