{"id":895,"date":"2026-07-01T15:30:22","date_gmt":"2026-07-01T15:30:22","guid":{"rendered":"https:\/\/boochlin.com\/?p=895"},"modified":"2026-09-16T09:53:39","modified_gmt":"2026-09-16T09:53:39","slug":"android-%e7%88%9b%e8%a3%9d%e7%bd%ae%e6%83%b3%e8%b7%91%e4%ba%ba%e8%87%89%e8%be%a8%e8%ad%987-%e7%89%a9%e7%90%86%e4%b8%96%e7%95%8c%e9%9c%80%e8%a6%81-watchdog","status":"publish","type":"post","link":"https:\/\/boochlin.com\/?p=895","title":{"rendered":"Android \u721b\u88dd\u7f6e\u60f3\u8dd1\u4eba\u81c9\u8fa8\u8b587 \u2013 \u7269\u7406\u4e16\u754c\u9700\u8981 watchdog"},"content":{"rendered":"<p>\u6211\u5011\u505a\u7684\u4e0d\u662f\u7d66\u624b\u6a5f\u7528\u6236\u8eba\u5728\u6c99\u767c\u4e0a\u6ed1\u7684 App\u3002<\/p>\n<p>\u624b\u6a5f App \u9583\u9000\u4e86\uff0c\u7528\u6236\u624b\u6307\u9ede\u4e00\u4e0b\u91cd\u65b0\u6253\u958b\u3002\u6211\u5011\u505a\u7684\u662f\u4e00\u53f0\u639b\u5728\u7246\u4e0a\u30017&#215;24 \u5c0f\u6642\u98a8\u5439\u65e5\u66ec\u7684\u4eba\u81c9\u8fa8\u8b58\u9580\u7981\u6a5f\u3002\u7576\u5b83\u5728\u534a\u591c\u4e09\u9ede\u56e0\u70ba\u76f8\u6a5f\u65b7\u6d41\u3001\u7db2\u8def\u5047\u6b7b\u6216 OOM \u5d29\u6f70\u6642\uff0c\u96e3\u9053\u4f60\u8981\u534a\u591c\u9a0e\u8eca\u53bb\u73fe\u5834\u62d4\u96fb\u6e90\u91cd\u63d2\uff1f<\/p>\n<p>\u6211\u5011\u9700\u8981\u4e00\u96bb\u771f\u6b63\u5177\u6709\u300c\u4e0d\u6b7b\u4e4b\u8eab\u300d\u7684\u770b\u9580\u72d7\uff08Watchdog\uff09\u3002<\/p>\n<hr>\n<h2>\u5de5\u696d\u7d1a\u4e3b\u6d41\u6a19\u6e96 vs \u6211\u5011\u7684 BOM \u8868\u696d\u969c<\/h2>\n<p>\u5728\u8eca\u8f09\u8207\u5de5\u696d\u7d1a\u4e3b\u6d41\u67b6\u69cb\u4e2d\uff0c\u7cfb\u7d71\u7a69\u5b9a\u6027\u7531\u4e09\u5c64\u56b4\u5bc6\u7684\u9632\u79a6\u634d\u885b\uff1a<\/p>\n<ul>\n<li><strong>\u9802\u5c64\uff08AOSP\uff09<\/strong>\uff1a<code>Watchdog.java<\/code> \u76e3\u63a7 SystemServer \u6838\u5fc3\u9396\u3002<\/li>\n<li><strong>\u4e2d\u5c64\uff08Linux\uff09<\/strong>\uff1a\u555f\u7528 <code>\/dev\/watchdog<\/code>\uff08SoC PMIC \u6676\u7247\u7d1a\u770b\u9580\u72d7\uff09\uff0cKernel Panic \u81ea\u52d5 Reset\u3002<\/li>\n<li><strong>\u5e95\u5c64\uff08\u5916\u7f6e MCU\uff09<\/strong>\uff1a\u4e3b\u677f\u6a19\u914d\u7368\u7acb STM32 \u6676\u7247\u3002Android \u900f\u904e GPIO \u5b9a\u6642\u9001\u65b9\u6ce2\u8108\u885d\uff08\u786c\u9ad4\u9935\u72d7\uff09\uff1b\u4e00\u65e6\u9023\u7e8c 60 \u79d2\u6c92\u6536\u5230\u8108\u885d\uff0cMCU \u900f\u904e MOS \u7ba1\u76f4\u63a5\u5207\u65b7\u6574\u6a5f 12V \u4f9b\u96fb\u5f37\u5236\u51b7\u91cd\u555f\uff08Cold Power Cycle\uff09\u3002<\/li>\n<\/ul>\n<p>\u9019\u662f\u6559\u79d1\u66f8\u88e1\u6700\u512a\u96c5\u7684\u9632\u79a6\u3002<\/p>\n<p>\u4f46\u6211\u5011\u9762\u5c0d\u7684\u662f\u9ad8\u901a QM215 \u914d 2GB RAM \u7684\u5ec9\u50f9\u677f\u5b50\u3002\u8001\u95c6\u70ba\u4e86\u7701\u4e0b\u5e7e\u6bdb\u7f8e\u91d1\u7684\u6210\u672c\uff0c\u786c\u662f\u628a\u7368\u7acb\u7684\u786c\u9ad4 MCU \u7d66\u62d4\u4e86\uff01<\/p>\n<p>\u8eab\u70ba\u8edf\u9ad4\u5de5\u7a0b\u5e2b\uff0c\u6c92\u6709\u786c\u9ad4\u795e\u4ed9\u4fdd\u8b77\uff0c\u6211\u5011\u53ea\u80fd\u7528 Android \u8207\u5e95\u5c64 GPIO \u628a\u8edf\u9ad4\u770b\u9580\u72d7\u903c\u5230\u6975\u9650\u3002<\/p>\n<hr>\n<h2>\u986f\u5f0f\u975c\u614b\u5ee3\u64ad\u7684\u300c\u8d77\u6b7b\u56de\u751f\u8853\u300d<\/h2>\n<p>\u5f88\u591a\u4eba\u505a\u770b\u9580\u72d7\uff0c\u76f4\u89ba\u5c31\u662f\u7528\u80cc\u666f <code>RestartService<\/code> \u8dd1\u7121\u7aae\u8ff4\u5708\u3002<\/p>\n<p>\u4f46\u5728 2GB \u721b\u677f\u5b50\u4e0a\uff0c\u7576 AI \u6a21\u578b\u5403\u6eff\u8a18\u61b6\u9ad4\u6642\uff0cLMKD \u4e00\u65e6\u767c\u8d77 OOM \u79d2\u6bba\uff0c\u4f9d\u9644\u5728\u9032\u7a0b\u88e1\u7684 <code>Service<\/code> \u6703\u7576\u5834\u8ddf\u8457\u966a\u846c\uff0c\u9023\u500b\u907a\u8a00\u90fd\u7559\u4e0d\u4e0b\u4f86\u3002<\/p>\n<p>\u6211\u5011\u7684\u89e3\u6cd5\u662f\uff1a<strong><code>AlarmManager<\/code>\uff08<code>setExactAndAllowWhileIdle<\/code> \u93c8\u5f0f\u8abf\u5ea6\uff09+ \u986f\u5f0f\u975c\u614b\u8a3b\u518a <code>SystemEventReceiver<\/code><\/strong>\u3002<\/p>\n<pre><code class=\"language-java\">\/\/ SystemWatchdog.java\npublic static void scheduleNextHeartbeat(Context context) {\n    AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);\n    Intent intent = new Intent(context, SystemEventReceiver.class);\n    PendingIntent pi = PendingIntent.getBroadcast(\n        context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE\n    );\n\n    long triggerAtMillis = SystemClock.elapsedRealtime() + 15 * 1000;\n\n    \/\/ \u7a7f\u900f Android 9\/10 Doze Mode \u7684\u6838\u5fc3\u9632\u79a6\uff1a\n    \/\/ \u666e\u901a setInexactRepeating \u6703\u5728\u591c\u9593\u5f85\u6a5f\u6642\u88ab\u7cfb\u7d71\u5c0d\u9f4a\u5ef6\u9072\u6578\u5341\u5206\u9418\uff01\n    \/\/ \u5fc5\u9808\u4f7f\u7528 setExactAndAllowWhileIdle \u78ba\u4fdd\u4f4e\u529f\u8017\u671f\u6e96\u6642\u89f8\u767c\uff1a\n    if (Build.VERSION.SDK_INT &gt;= Build.VERSION_CODES.M) {\n        am.setExactAndAllowWhileIdle(AlarmManager.ELAPSED_REALTIME_WAKEUP, triggerAtMillis, pi);\n    } else {\n        am.setExact(AlarmManager.ELAPSED_REALTIME_WAKEUP, triggerAtMillis, pi);\n    }\n}\n<\/code><\/pre>\n<p>\u914d\u5957\u5de5\u63a7\u7cfb\u7d71\u914d\u7f6e\uff1a<\/p>\n<ol>\n<li><strong>\u905e\u8ff4\u93c8\u5f0f\u9810\u7d04<\/strong>\uff1a\u5728 <code>SystemEventReceiver.onReceive()<\/code> \u8655\u7406\u5b8c\u9935\u72d7\u908f\u8f2f\u5f8c\uff0c\u672b\u5c3e\u7acb\u523b\u518d\u6b21\u8abf\u7528 <code>scheduleNextHeartbeat(context)<\/code>\uff0c\u5f62\u6210\u6c38\u4e0d\u4e2d\u65b7\u7684 15 \u79d2\u7cbe\u78ba\u8108\u885d\u3002<\/li>\n<li><strong>ROM \u7d1a\u96fb\u6c60\u767d\u540d\u55ae<\/strong>\uff1a\u5de5\u63a7\u6a5f\u97cc\u9ad4\u5728\u51fa\u5ee0\u6642\uff0c\u65bc <code>\/etc\/sysconfig\/whitelist.xml<\/code> \u52a0\u5165 <code>&lt;allow-in-power-save package=&quot;com.edge.ai.gate&quot; \/&gt;<\/code>\uff0c\u5fb9\u5e95\u8c41\u514d Doze Mode \u4f11\u7720\u9650\u5236\u3002<\/li>\n<\/ol>\n<blockquote>\n<p>[!WARNING]<br \/>\n\u6ce8\u610f\uff1a\u5728\u6a19\u6e96 Android \u7cfb\u7d71\u4e0a\uff0csetExactAndAllowWhileIdle \u5728 Doze \u6a21\u5f0f\u4e0b\u5b58\u5728\u6700\u77ed 9 \u5206\u9418\u7684\u89f8\u767c\u9593\u9694\u9650\u5236\u3002\u672c\u65b9\u6848\u80fd\u9054\u6210 15 \u79d2\u7d1a\u7cbe\u78ba\u89f8\u767c\uff0c\u662f\u56e0\u70ba\u6211\u5011\u7684\u9580\u7981\u7d42\u7aef\u70ba\u81ea\u63a7 ROM\uff0c\u5df2\u5728\u7cfb\u7d71\u5c64\u9762\u5fb9\u5e95\u95dc\u9589 Doze Mode\uff08\u900f\u904e DeviceIdleController \u767d\u540d\u55ae\u6216\u76f4\u63a5\u5728 Framework \u4e2d disable idle mode\uff09\uff0c\u4e00\u822c\u6d88\u8cbb\u7d1a App \u7121\u6cd5\u8907\u88fd\u6b64\u884c\u70ba\u3002<\/p>\n<\/blockquote>\n<h3>\u70ba\u4ec0\u9ebc\u9032\u7a0b\u6b7b\u5149\u4e86\uff0c\u7cfb\u7d71\u771f\u7684\u80fd\u628a\u5b83\u62c9\u6d3b\uff1f<\/h3>\n<ol>\n<li><strong>\u5b9a\u6642\u5668\u6d3b\u5728\u7cfb\u7d71\u5c64<\/strong>\uff1a<code>PendingIntent<\/code> \u662f\u8a3b\u518a\u4e26\u4fdd\u5b58\u5728 <code>system_server<\/code> \u7684 <code>AlarmManagerService<\/code> \u4e2d\u3002App \u9032\u7a0b\u88ab LMKD \u780d\u6389\u6642\uff0c\u7cfb\u7d71\u5b9a\u6642\u5668\u4f9d\u7136\u5b8c\u597d\u7121\u640d\u3002<\/li>\n<li><strong>\u88ab\u6bba \u2260 \u5f37\u5236\u505c\u6b62<\/strong>\uff1a\u9580\u7981\u6a5f\u6c92\u4eba\u6703\u53bb\u9ede\u7cfb\u7d71\u8a2d\u5b9a\u88e1\u7684\u300c\u5f37\u5236\u505c\u6b62\u300d\uff08\u4e0d\u6703\u88ab\u6253\u4e0a <code>FLAG_STOPPED<\/code>\uff09\u3002\u88ab OOM \u6bba\u6b7b\u7684\u9032\u7a0b\uff0c\u5728 Android \u773c\u4e2d\u4f9d\u7136\u662f\u6d3b\u8e8d\u61c9\u7528\u3002<\/li>\n<li><strong>\u986f\u5f0f\u6307\u5b9a Class \u7a7f\u900f\u9650\u5236<\/strong>\uff1aAndroid 8.0+ \u5c01\u6bba\u4e86\u96b1\u5f0f\u5ee3\u64ad\uff0c\u4f46\u6211\u5011\u660e\u78ba\u6307\u540d <code>SystemEventReceiver.class<\/code>\u3002\u6642\u9593\u4e00\u5230\uff0cAMS \u767c\u73fe\u9032\u7a0b\u5df2\u6b7b\uff0c<strong>\u6703\u7acb\u523b\u547d\u4ee4 <code>Zygote<\/code> \u7576\u5834 fork \u4e00\u500b\u5168\u65b0 Linux \u9032\u7a0b\u51b7\u555f\u52d5<\/strong>\uff01<\/li>\n<\/ol>\n<hr>\n<h2>\u7db2\u8def\u6b7b\u9396\u5075\u6e2c\uff1a\u70ba\u4ec0\u9ebc NUD \u662f\u5929\u7136\u7684\u5e95\u5c64\u770b\u9580\u72d7\uff1f<\/h2>\n<p>\u50b3\u7d71\u7684\u7db2\u8def\u6aa2\u67e5\u6709\u5169\u5927\u81f4\u547d\u9677\u9631\uff1a<\/p>\n<ol>\n<li><strong><code>ConnectivityManager.isConnected()<\/code> \u7684\u5047\u9023\u7dda\u9677\u9631<\/strong>\uff1a\u5b83\u53ea\u770b\u7db2\u7dda\u6709\u6c92\u6709\u63d2\u4e0a\u3002\u7db2\u5361\u6676\u7247\u5e95\u5c64\u6b7b\u9396\u6642\u4f9d\u7136\u56de\u5831 <code>true<\/code>\uff0c\u9580\u7981\u6a5f\u76f4\u63a5\u8b8a\u78da\u3002<\/li>\n<li><strong>Ping \/ HTTP \u8f2a\u8a62<\/strong>\uff1a\u5c01\u9589\u5c40\u57df\u7db2\uff08\u7121\u5916\u7db2\uff09\u76f4\u63a5\u5931\u6548\uff0c\u800c\u4e14\u96f2\u7aef\u4f3a\u670d\u5668\u7a0d\u5fae\u6296\u52d5\u6975\u6613\u5f15\u767c\u8aa4\u6bba\u91cd\u555f\u3002<\/li>\n<\/ol>\n<h3>\u7db2\u5361\u786c\u9ad4\u5047\u6b7b\u7684 4 \u5927\u7269\u7406\u6210\u56e0<\/h3>\n<ul>\n<li><strong>\u7e7c\u96fb\u5668\u96fb\u78c1\u9396\u53cd\u5411\u96fb\u52d5\u52e2\uff08Back-EMF\uff09<\/strong>\uff1a\u958b\u9580\u77ac\u9593\u4e0a\u767e\u4f0f\u7279\u53cd\u885d\u96fb\u58d3\u900f\u904e\u5730\u7dda\u96dc\u8a0a\u6253\u9032\u6676\u7247\uff0c\u89f8\u767c CMOS \u6676\u9598\u7ba1\u9396\u6b7b\uff08Latch-up\uff09\u3002<\/li>\n<li><strong>\u5e7e\u5341\u7c73\u9577\u7db2\u7dda\u975c\u96fb\uff08ESD\uff09<\/strong>\uff1a\u7834\u58de\u7db2\u5361\u6642\u8108\u6062\u5fa9\u96fb\u8def\uff08PLL \u5931\u9396\uff09\uff0c\u6578\u4f4d\u89e3\u8abf\u5668\u7671\u7613\u4f46\u985e\u6bd4\u524d\u7aef\u4f9d\u7136\u56de\u5831 Link Up\u3002<\/li>\n<li><strong>USB \u8f49\u7db2\u5361\u7aef\u9ede\u639b\u6b7b\uff08USB Endpoint Halt\uff09<\/strong>\u3002<\/li>\n<li><strong>\u5ee3\u64ad\u98a8\u66b4\u8207 FIFO \u6ea2\u4f4d<\/strong>\uff1aCPU \u5fd9\u65bc\u7b97\u81c9\u6642\uff0c\u5167\u7db2\u5ee3\u64ad\u704c\u7206\u7db2\u5361\u5fae\u5c0f\u7684 16KB SRAM \u7de9\u885d\u5340\u3002<\/li>\n<\/ul>\n<h3>NUD \u662f\u5982\u4f55\u5b8c\u7f8e\u626e\u6f14\u770b\u9580\u72d7\u7684\uff1f<\/h3>\n<p>Linux \u6838\u5fc3\u7684 <strong>NUD\uff08Neighbor Unreachability Detection\uff09<\/strong> \u5728 Layer 2 \u5167\u5efa\u4e86\u4e00\u5957\u5b8c\u6574\u7684\u770b\u9580\u72d7\u72c0\u614b\u6a5f\uff1a<\/p>\n<pre><code class=\"language-java\">\/\/ SystemEventReceiver.java\nif (nudState == SystemEventReceiver.NUD_FAILED) {\n    if (curTime - prevArpFailTimeMS &gt; ARP_RESET_USB_TIME_INTERVAL \/* 60\u79d2 *\/) {\n        gpIO.hwRest(); \/\/ \u5224\u5b9a\u7db2\u5361\u786c\u9ad4\u6b7b\u9396\uff0c\u89f8\u767c\u786c\u9ad4\u5fa9\u4f4d\n    }\n} else if (nudState == SystemEventReceiver.NUD_REACHABLE) {\n    prevArpFailTimeMS = 0;\n    arpResetCount = 0; \/\/ \u6210\u529f\u6536\u5230\u7db2\u95dc ARP\uff0c\u770b\u9580\u72d7\u8a08\u6578\u5668\u6b78\u96f6\uff08\u9935\u72d7\uff01\uff09\n}\n<\/code><\/pre>\n<ul>\n<li><strong>\u5fc3\u8df3\u63a2\u91dd\uff080 CPU \u8ca0\u64d4\uff09<\/strong>\uff1aLinux \u6838\u5fc3\u5411\u5916\u767c\u5305\u6642\u81ea\u52d5\u767c\u8d77 ARP \u63a2\u6e2c\u7db2\u95dc\uff0c\u4e0d\u9700\u8981 Java \u958b\u4efb\u4f55 Ping \u57f7\u884c\u7dd2\u3002<\/li>\n<li><strong>\u5b9a\u6642\u5668\u5fa9\u4f4d\uff08\u9935\u72d7\uff09<\/strong>\uff1a\u7db2\u95dc\u6b63\u5e38\u56de\u8986 ARP\uff0c\u72c0\u614b\u70ba <code>NUD_REACHABLE<\/code>\uff0c\u770b\u9580\u72d7\u8a08\u6578\u5668\u6b78\u96f6\u3002<\/li>\n<li><strong>\u8d85\u6642\u54ac\u6b7b\uff08\u5fa9\u4f4d\uff09<\/strong>\uff1a\u7db2\u5361\u6676\u7247\u6b7b\u9396\u5c0e\u81f4 ARP \u5168\u6ec5\uff0c\u6838\u5fc3\u5ee3\u64ad <code>NUD_FAILED<\/code>\u3002\u7d2f\u7a4d 60 \u79d2\u6c92\u88ab\u9935\u72d7\uff0c\u5beb\u5165 <code>\/mnt\/vendor\/persist\/vendor\/nudReport.txt<\/code> \u7559\u8b49\uff0c\u4e26\u89f8\u767c GPIO \u65b7\u96fb\u91cd\u555f\u3002<\/li>\n<\/ul>\n<p>\u5916\u7db2\u65b7\u4e86\u4f46\u7db2\u95dc\u9084\u5728\uff08<code>NUD_REACHABLE<\/code>\uff09\uff0c\u9580\u7981\u6a5f\u7d55\u4e0d\u91cd\u958b\uff0c\u512a\u96c5\u964d\u7d1a\u70ba\u96e2\u7dda\u5237\u81c9\uff1b\u53ea\u6709\u7db2\u5361\u786c\u9ad4\u5fb9\u5e95\u6b7b\u9396\u6642\u624d\u89f8\u767c\u91cd\u555f\u3002<\/p>\n<hr>\n<h2>\u76f8\u6a5f\u65b7\u6d41\u8207\u5169\u6bb5\u5f0f\u786c\u9ad4\u96fb\u64ca<\/h2>\n<p>USB \u76f8\u6a5f\u63a7\u5236\u5668\u6b7b\u9396\u6642\uff0cAPI \u56de\u5831\u6b63\u5e38\u4f46\u756b\u9762\u51cd\u7d50\u5728\u6700\u5f8c\u4e00\u5e40\u3002\u770b\u9580\u72d7\u6bcf 15 \u79d2\u6aa2\u67e5\u4e00\u6b21\uff1a<strong>\u8d85\u904e 30 \u79d2\u6c92\u6536\u5230\u65b0\u756b\u9762\uff08<code>curTime - rgbAliveTimestampMS &gt; 30s<\/code>\uff09<\/strong>\uff0c\u5224\u5b9a\u76f8\u6a5f\u6b7b\u4ea1\u3002<\/p>\n<p>\u6211\u5011\u8a2d\u8a08\u4e86**\u300c\u5169\u6bb5\u5f0f\u964d\u7dad\u6253\u64ca\u300d**\uff1a<\/p>\n<pre><code class=\"language-java\">\/\/ RestartService.java &amp; DeviceGpio.java\nif (curTime - rgbAliveTimestampMS &gt; LIMIT \/* 30\u79d2 *\/) {\n    \/\/ \u7b2c\u4e00\u968e\u6bb5\uff1a\u5c40\u90e8\u786c\u9ad4\u96fb\u64ca\uff08500ms GPIO \u5207\u65b7\u76f8\u6a5f\u4f9b\u96fb\uff09\n    gpIO.usbSwitchOn();\n    gpIO.usbRgbHwReset();\n    Thread.sleep(500); \/\/ \u65b7\u96fb 500ms\n    gpIO.usbSwitchOff();\n    rgbResetCount++;\n\n    \/\/ \u7b2c\u4e8c\u968e\u6bb5\uff1a\u9023\u7e8c 3 \u6b21\u6025\u6551\u7121\u6548\uff0c\u5168\u6a5f\u91cd\u958b\n    if (rgbResetCount &gt; RGB_RESET_LIMIT) {\n        gpIO.hwRest();           \/\/ \u62c9\u9ad8\u4e3b\u677f HW_RESET GPIO \u5f15\u8173\n        RuntimeUtils.reboot();   \/\/ \u57f7\u884c reboot \u6307\u4ee4\n    }\n}\n<\/code><\/pre>\n<ul>\n<li><strong>\u7b2c\u4e00\u968e\u6bb5\uff08\u5c40\u90e8\u96fb\u64ca\uff09<\/strong>\uff1aGPIO \u5207\u65b7 USB \u76f8\u6a5f\u4f9b\u96fb 500ms\uff0c\u8feb\u4f7f USB PHY \u91cd\u65b0\u679a\u8209\uff0c90% \u7684\u76f8\u6a5f\u6b7b\u9396\u5728 1 \u79d2\u5167\u6eff\u8840\u5fa9\u6d3b\uff0c\u7121\u9700\u91cd\u958b\u6a5f\u3002<\/li>\n<li><strong>\u7b2c\u4e8c\u968e\u6bb5\uff08\u5168\u6a5f\u6b7b\u5211\uff09<\/strong>\uff1a\u9023\u7e8c\u96fb\u64ca 3 \u6b21\u7121\u6548\uff0c\u5224\u5b9a USB \u7e3d\u7dda\u6b7b\u9396\uff0c\u62c9\u9ad8 <code>HW_RESET<\/code> GPIO \u5168\u6a5f\u51b7\u91cd\u555f\u3002<\/li>\n<\/ul>\n<hr>\n<h2>\u7d50\u8a9e\uff1a\u8edf\u9ad4\u770b\u9580\u72d7\u7684\u7269\u7406\u5929\u82b1\u677f<\/h2>\n<p>\u5728\u88ab\u95b9\u5272\u7368\u7acb MCU \u7684\u786c\u9ad4\u4e0a\uff0c\u6211\u5011\u9760\u300c\u986f\u5f0f\u5ee3\u64ad\u51b7\u555f\u52d5 + NUD \u5929\u7136\u770b\u9580\u72d7 + 500ms GPIO \u96fb\u64ca\u300d\u642d\u8d77\u6975\u5177\u97cc\u6027\u7684\u81ea\u6551\u9ad4\u7cfb\u3002<\/p>\n<p>\u4f46\u67b6\u69cb\u5e2b\u5fc5\u9808\u6e05\u9192\uff1a<strong>\u7d14\u8edf\u9ad4\u770b\u9580\u72d7\u6551\u4e0d\u4e86 Linux Kernel Panic\u3002<\/strong> \u5728\u90a3\u7a2e\u6975\u9650\u4e0b\uff0c\u5e95\u5c64\u552f\u4e00\u7684\u4fdd\u96aa\u53ea\u5269 Linux \u6838\u5fc3\u7684 <code>\/dev\/watchdog<\/code>\u3002<\/p>\n<p>\u5728\u6709\u9650\u9810\u7b97\u4e0b\u628a\u721b\u724c\u6253\u5230\u6975\u81f4\uff0c\u7528\u8edf\u786c\u5354\u540c\u5f4c\u88dc\u786c\u9ad4\u7f3a\u9677\uff0c\u9019\u624d\u662f\u908a\u7de3\u7aef\u5de5\u7a0b\u7684\u7cbe\u9ad3\u3002<\/p>\n<hr>\n<h2>\u53c3\u8003\u8cc7\u6599 (References)<\/h2>\n<ol>\n<li>\n<p><strong>Android Broadcasts Overview: Implicit vs Explicit Broadcast Restrictions<\/strong>.<br \/>\n<a href=\"https:\/\/developer.android.com\/guide\/components\/broadcasts\">https:\/\/developer.android.com\/guide\/components\/broadcasts<\/a><\/p>\n<\/li>\n<li>\n<p><strong>Linux Neighbor Unreachability Detection (NUD) RFC 4861<\/strong>.<br \/>\n<a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc4861\">https:\/\/datatracker.ietf.org\/doc\/html\/rfc4861<\/a><\/p>\n<\/li>\n<li>\n<p><strong>AOSP IpReachabilityMonitor in Android NetworkStack<\/strong>.<br \/>\n<a href=\"https:\/\/android.googlesource.com\/platform\/frameworks\/libs\/net\/+\/master\/common\/framework\/com\/android\/net\/module\/util\/IpReachabilityMonitor.java\">https:\/\/android.googlesource.com\/platform\/frameworks\/libs\/net\/+\/master\/common\/framework\/com\/android\/net\/module\/util\/IpReachabilityMonitor.java<\/a><\/p>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>\u6211\u5011\u4e0d\u662f\u5728\u505a\u7d66\u624b\u6a5f\u7528\u6236\u6ed1\u7684 App\u3002\u624b\u6a5f App \u9583\u9000\u4e86\uff0c\u5927\u4e0d\u4e86\u7528\u6236\u7f75\u53e5\u9ad2\u8a71\uff0c\u624b\u6307\u9ede\u4e00\u4e0b\u91cd\u65b0\u6253\u958b\u3002 \u6211\u5011\u505a\u7684\u662f\u4e00\u53f0\u639b\u5728\u7246\u4e0a\u3001\u98a8\u5439\u65e5\u66ec\u7684\u4eba\u81c9\u8fa8\u8b58\u9580\u7981\u6a5f\u3002\u958b\u6a5f\u5c31\u8dd1\u6a21\u578b\uff0c\u6a21\u578b\u5c31\u8981\u6d3b\u3002\u7576\u5b83\u5728\u534a\u591c\u4e09\u9ede\u56e0\u70ba\u7db2\u8def\u6b7b\u9396\u3001\u76f8\u6a5f\u65b7\u6d41\u3001\u6216\u8005\u88ab OOM \u780d\u6389\u6642\uff0c\u96e3\u9053\u4f60\u8981\u534a\u591c\u9a0e\u8eca\u53bb\u73fe\u5834\u62d4\u96fb\u6e90\uff1f<\/p>\n","protected":false},"author":1,"featured_media":1241,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[166],"tags":[218,117,118,116],"_links":{"self":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts\/895"}],"collection":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=895"}],"version-history":[{"count":27,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts\/895\/revisions"}],"predecessor-version":[{"id":1365,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts\/895\/revisions\/1365"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/media\/1241"}],"wp:attachment":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=895"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=895"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=895"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}