radxa-docs · nascs · Feb 12, 2025 · RadxaYuntian · Feb 12, 2025 · RadxaYuntian
@@ -0,0 +1,39 @@
+在嵌入式 Linux 系统中，看门狗（Watchdog Timer，简称 WDT）是一种用于 监控系统运行状态的硬件与软件结合的机制，主要目的是在系统出现故障(如死机、卡死或程序失控)时自动触发重启，确保系统能从异常状态中恢复。
+
+### 开启 watchdog
+
+硬件 watchdog 默认没有开启， 需要通过 <a href={props.rsetup_path} alt="rsetup path" > rsetup </a> 开启 watchdog 的 overlay,
+
+### 测试 watchdog
+
+- 输入如下命令后，系统不再喂狗， watchdog 会自动重启
+
+```bash
+
+echo B > /dev/watchdog
+
+```
+
+:::warning
+
+这里可以写入除大写 V 之外的任意字符，因为大写 V 是用来关闭 watchdog 的。
+
+:::
+
+- 关闭系统 panic 重启
+
+```bash
+
+echo 0 > /sys/module/kernel/parameters/panic
+
+```
+
+- 模拟系统卡住
+
+```bash
+
+echo c > proc/sysrq-trigger
+
+```
+
+- 等待 30 秒左右，看系统是否重启，如果系统能够重启，则表示 watchdog 正常工作
@@ -0,0 +1,9 @@
+---
+sidebar_position: 20
+---
+
+import WDT from "../../../../common/dev/\_watchdog.mdx";
+
+# Watchdog
+
+<WDT rsetup="../../radxa-os/rsetup" />
@@ -0,0 +1,9 @@
+---
+sidebar_position: 20
+---
+
+import WDT from "../../../../common/dev/\_watchdog.mdx";
+
+# Watchdog
+
+<WDT rsetup="../../radxa-os/rsetup" />
diff --git a/docs/rock3/rock3b/getting-started/interface-usage/watchdog.md b/docs/rock3/rock3b/getting-started/interface-usage/watchdog.md
@@ -0,0 +1,9 @@
+---
+sidebar_position: 20
+---
+
+import WDT from "../../../../common/dev/\_watchdog.mdx";
+
+# Watchdog
+
+<WDT rsetup="../../radxa-os/rsetup" />
@@ -0,0 +1,9 @@
+---
+sidebar_position: 20
+---
+
+import WDT from "../../../../common/dev/\_watchdog.mdx";
+
+# Watchdog
+
+<WDT rsetup="../../radxa-os/rsetup" />
@@ -0,0 +1,9 @@
+---
+sidebar_position: 20
+---
+
+import WDT from "../../../../common/dev/\_watchdog.mdx";
+
+# Watchdog
+
+<WDT rsetup="../../radxa-os/rsetup" />
@@ -0,0 +1,9 @@
+---
+sidebar_position: 20
+---
+
+import WDT from "../../../../common/dev/\_watchdog.mdx";
+
+# Watchdog
+
+<WDT rsetup="../../radxa-os/rsetup" />
diff --git a/docs/rock5/rock5itx/getting-started/interface-usage/watchdog.md b/docs/rock5/rock5itx/getting-started/interface-usage/watchdog.md
@@ -0,0 +1,9 @@
+---
+sidebar_position: 20
+---
+
+import WDT from "../../../../common/dev/\_watchdog.mdx";
+
+# Watchdog
+
+<WDT rsetup="../../radxa-os/rsetup" />
@@ -0,0 +1,9 @@
+---
+sidebar_position: 20
+---
+
+import WDT from "../../../../common/dev/\_watchdog.mdx";
+
+# Watchdog
+
+<WDT rsetup="../../radxa-os/rsetup" />
@@ -0,0 +1,39 @@
+In embedded Linux systems, a Watchdog Timer (WDT) is a hardware and software mechanism used to monitor the system's operational state. Its main purpose is to automatically trigger a reboot when the system encounters failures (such as a crash, freeze, or program hang), ensuring the system recovers from abnormal states.
+
+### Enablethe Watchdog
+
+The hardware watchdog is disabled by default. It needs to be enabled using the <a href={props.rsetup_path} alt="rsetup path" > rsetup </a> to activate the watchdog overlay.
+
+### Testing the Watchdog
+
+- Run the following command to stop feeding the watchdog. The watchdog will automatically reboot the system:
+
+```bash
+
+echo B > /dev/watchdog
+
+```
+
+:::warning
+
+You can write any character except for uppercase V, as uppercase V is used to disable the watchdog.
+
+:::
+
+- Disable system panic reboot:
+
+```bash
+
+echo 0 > /sys/module/kernel/parameters/panic
+
+```
+
+- Simulate a system freeze:
+
+```bash
+
+echo c > proc/sysrq-trigger
+
+```
+
+- Wait for approximately 30 seconds to see if the system reboots. If the system successfully reboots, it indicates that the watchdog is functioning correctly.
@@ -0,0 +1,9 @@
+---
+sidebar_position: 20
+---
+
+import WDT from "../../../../common/dev/\_watchdog.mdx";
+
+# Watchdog
+
+<WDT rsetup="../../radxa-os/rsetup" />
@@ -0,0 +1,9 @@
+---
+sidebar_position: 20
+---
+
+import WDT from "../../../../common/dev/\_watchdog.mdx";
+
+# Watchdog
+
+<WDT rsetup="../../radxa-os/rsetup" />
diff --git a/...n-content-docs/current/rock3/rock3b/getting-started/interface-usage/watchdog.md b/...n-content-docs/current/rock3/rock3b/getting-started/interface-usage/watchdog.md
@@ -0,0 +1,9 @@
+---
+sidebar_position: 20
+---
+
+import WDT from "../../../../common/dev/\_watchdog.mdx";
+
+# Watchdog
+
+<WDT rsetup="../../radxa-os/rsetup" />
@@ -0,0 +1,9 @@
+---
+sidebar_position: 20
+---
+
+import WDT from "../../../../common/dev/\_watchdog.mdx";
+
+# Watchdog
+
+<WDT rsetup="../../radxa-os/rsetup" />
@@ -0,0 +1,9 @@
+---
+sidebar_position: 20
+---
+
+import WDT from "../../../../common/dev/\_watchdog.mdx";
+
+# Watchdog
+
+<WDT rsetup="../../radxa-os/rsetup" />
@@ -0,0 +1,9 @@
+---
+sidebar_position: 20
+---
+
+import WDT from "../../../../common/dev/\_watchdog.mdx";
+
+# Watchdog
+
+<WDT rsetup="../../radxa-os/rsetup" />
diff --git a/...content-docs/current/rock5/rock5itx/getting-started/interface-usage/watchdog.md b/...content-docs/current/rock5/rock5itx/getting-started/interface-usage/watchdog.md
@@ -0,0 +1,9 @@
+---
+sidebar_position: 20
+---
+
+import WDT from "../../../../common/dev/\_watchdog.mdx";
+
+# Watchdog
+
+<WDT rsetup="../../radxa-os/rsetup" />
@@ -0,0 +1,9 @@
+---
+sidebar_position: 20
+---
+
+import WDT from "../../../../common/dev/\_watchdog.mdx";
+
+# Watchdog
+
+<WDT rsetup="../../radxa-os/rsetup" />