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<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/watchdog/watchdog-demo.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">Demo</h1><div class="date inPage">26 Nov 2024</div><div style="color: gray;">
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Read time: 2 minute(s)
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</div><div class="- topic/body concept/conbody body conbody"><div class="- topic/p p" data-ofbid="d276023e23__20250121171747">本 Demo 展示了如何使用 Watchdog 设备，并通过 <code class="+ topic/ph pr-d/codeph ph codeph">test-wdt</code>
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命令进行操作。<code class="+ topic/ph pr-d/codeph ph codeph">test-wdt</code> 的详细说明，可查看源代码文件
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<span class="+ topic/ph sw-d/filepath ph filepath">bsp/examples/test-wdt/test-wdt.c</span>。本 Demo 可以作为 Watchdog
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设备的使用参考：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="watchdog_demo__codeblock_a43_v2h_ddc" data-ofbid="watchdog_demo__codeblock_a43_v2h_ddc">#include <rtthread.h>
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#include <aic_core.h>
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#include <drivers/watchdog.h>
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#include <aic_drv_wdt.h>
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#include <hal_wdt.h>
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#include <getopt.h>
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irqreturn_t aic_wdt_irq(<strong class="hl-keyword">int</strong> irq, <strong class="hl-keyword">void</strong> *arg)
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{
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rt_kprintf(<span class="hl-string">"Watchdog chan0 IRQ happened\n"</span>);
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<strong class="hl-keyword">return</strong> IRQ_HANDLED;
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}
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<strong class="hl-keyword">static</strong> <strong class="hl-keyword">void</strong> idle_hook(<strong class="hl-keyword">void</strong>)
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{
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rt_device_t wdt_dev = RT_NULL;
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wdt_dev = rt_device_find(<span class="hl-string">"wdt"</span>);
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rt_device_control(wdt_dev, RT_DEVICE_CTRL_WDT_KEEPALIVE, NULL);
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}
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<strong class="hl-keyword">static</strong> <strong class="hl-keyword">void</strong> usage(<strong class="hl-keyword">char</strong> * program)
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{
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printf(<span class="hl-string">"\n"</span>);
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printf(<span class="hl-string">"Usage: %s [-s timeout] [-p pretimeout] [-c clear threshold] [-g] [-k] [-u]\n"</span>,\
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program);
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printf(<span class="hl-string">"\t -s, --set-timeout\tSet a timeout, in second\n"</span>);
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printf(<span class="hl-string">"\t -p, --set-pretimeout\tSet a pretimeout, in second\n"</span>);
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printf(<span class="hl-string">"\t -c, --set-clear threshold\tSet clear threshold,in second(0~3)\n"</span>);
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printf(<span class="hl-string">"\t -g, --get-timeout\tGet the current timeout, in second\n"</span>);
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printf(<span class="hl-string">"\t -k, --keepalive\tKeepalive the watchdog\n"</span>);
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printf(<span class="hl-string">"\t -u, --usage \n"</span>);
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printf(<span class="hl-string">"\n"</span>);
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}
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<strong class="hl-keyword">void</strong> test_wdt(<strong class="hl-keyword">int</strong> argc, <strong class="hl-keyword">char</strong> **argv)
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{
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<strong class="hl-keyword">int</strong> opt;
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<strong class="hl-keyword">int</strong> timeout = <span class="hl-number">0</span>;
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rt_device_t wdt_dev = RT_NULL;
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wdt_dev = rt_device_find(<span class="hl-string">"wdt"</span>);
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rt_device_init(wdt_dev);
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optind = <span class="hl-number">0</span>;
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<strong class="hl-keyword">while</strong> ((opt = getopt(argc, argv, <span class="hl-string">"s:p:c:gku"</span>)) != -<span class="hl-number">1</span>) {
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<strong class="hl-keyword">switch</strong> (opt) {
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<strong class="hl-keyword">case</strong> <span class="hl-string">'c'</span>:
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timeout = strtoul(optarg, NULL, <span class="hl-number">10</span>);
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rt_device_control(wdt_dev, RT_DEVICE_CTRL_WDT_SET_CLR_THD, &timeout);
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rt_kprintf(<span class="hl-string">"set clear threshold:%d\n"</span>, timeout);
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<strong class="hl-keyword">break</strong>;
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<strong class="hl-keyword">case</strong> <span class="hl-string">'s'</span>:
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timeout = strtoul(optarg, NULL, <span class="hl-number">10</span>);
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rt_device_control(wdt_dev, RT_DEVICE_CTRL_WDT_SET_TIMEOUT, &timeout);
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rt_device_control(wdt_dev, RT_DEVICE_CTRL_WDT_START, RT_NULL);
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rt_kprintf(<span class="hl-string">"set timeout:%d\n"</span>, timeout);
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<strong class="hl-keyword">break</strong>;
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<strong class="hl-keyword">case</strong> <span class="hl-string">'g'</span>:
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rt_device_control(wdt_dev, RT_DEVICE_CTRL_WDT_GET_TIMEOUT, &timeout);
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rt_kprintf(<span class="hl-string">"timeout:%d\n"</span>, timeout);
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<strong class="hl-keyword">break</strong>;
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<strong class="hl-keyword">case</strong> <span class="hl-string">'p'</span>:
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timeout = strtoul(optarg, NULL, <span class="hl-number">10</span>);
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rt_device_control(wdt_dev, RT_DEVICE_CTRL_WDT_SET_IRQ_TIMEOUT, &timeout);
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rt_device_control(wdt_dev, RT_DEVICE_CTRL_WDT_IRQ_ENABLE, &aic_wdt_irq);
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rt_kprintf(<span class="hl-string">"set pretimeout:%d\n"</span>, timeout);
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<strong class="hl-keyword">break</strong>;
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<strong class="hl-keyword">case</strong> <span class="hl-string">'k'</span>:
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rt_thread_idle_sethook(idle_hook);
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rt_kprintf(<span class="hl-string">"feed the dog! \n"</span>);
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<strong class="hl-keyword">break</strong>;
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<strong class="hl-keyword">case</strong> <span class="hl-string">'u'</span>:
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<strong class="hl-keyword">default</strong>:
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usage(argv[<span class="hl-number">0</span>]);
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}
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}
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}
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MSH_CMD_EXPORT_ALIAS(test_wdt, test_wdt, Reboot the system);</pre></div></div></article></main></div>
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