2025-04-23 17:54:31 +08:00
<!DOCTYPE html> < html xmlns = "http://www.w3.org/1999/xhtml" xml:lang = "zh-cn" lang = "zh-cn" data-whc_version = "26.1" >
2025-07-22 11:15:46 +08:00
< head > < meta http-equiv = "Content-Type" content = "text/html; charset=UTF-8" / > < meta name = "viewport" content = "width=device-width, initial-scale=1.0" / > < meta http-equiv = "X-UA-Compatible" content = "IE=edge" / > < meta name = "description" content = "看门狗 (Watchdog, WDT) 定时器可以监控系统的健康状态，并在系统无法正常使用时，强制复位系统。看门狗内部有一个递减计数器，在系统正常运行期间，通过重置计数可以保证看门狗模块不触发复位。 表 1 . 术语定义 术语 定义 注释说明 WDT Watchdog， / > < meta name = "DC.rights.owner" content = "(C) 版权 2025" / > < meta name = "copyright" content = "(C) 版权 2025" / > < meta name = "generator" content = "DITA-OT" / > < meta name = "DC.type" content = "concept" / > < meta name = "DC.relation" content = "../../../topics/chapter-title/chapter-system.html" / > < meta name = "DC.relation" content = "../../../topics/sdk/tsensor/tsensor-faq.html" / > < meta name = "DC.relation" content = "../../../topics/sdk/watchdog/watchdog-config-lite.html" / > < meta name = "DC.relation" content = "../../../topics/sdk/watchdog/watchdog-config-lite.html" / > < meta name = "DC.relation" content = "../../../topics/sdk/watchdog/watchdog-debug-lite.html" / > < meta name = "DC.relation" content = "../../../topics/sdk/watchdog/watchdog-test-guide-lite.html" / > < meta name = "DC.relation" content = "../../../topics/sdk/watchdog/watchdog-design-lite.html" / > < meta name = "DC.contributor" content = "yan.wang" / > < meta name = "DC.contributor" content = "yan.wang" / > < meta name = "DC.date.modified" content = "2025-05-16" / > < meta name = "DC.format" content = "HTML5" / > < meta name = "DC.identifier" content = "watchdog" / > < meta name = "DC.language" content = "zh-CN" / > < title > Watchdog 使用指南< / title > <!-- Generated with build number 2025051600. --> < meta name = "wh-path2root" content = "../../../" / > < meta name = "wh-toc-id" content = "watchdog-d3752e3581" / > < meta name = "wh-source-relpath" content = "topics/sdk/watchdog/watchdog-user-guide.dita" / > < meta name = "wh-out-relpath" content = "topics/sdk/watchdog/watchdog-user-guide.html" / >
2025-01-23 16:37:00 +08:00
2025-04-23 17:54:31 +08:00
< link rel = "stylesheet" type = "text/css" href = "../../../webhelp/app/commons.css?buildId=2024041900" / >
< link rel = "stylesheet" type = "text/css" href = "../../../webhelp/app/topic.css?buildId=2024041900" / >
2025-01-23 16:37:00 +08:00
2025-07-22 11:15:46 +08:00
< script src = "../../../webhelp/app/options/properties.js?buildId=20250519091401" > < / script >
2025-04-23 17:54:31 +08:00
< script src = "../../../webhelp/app/localization/strings.js?buildId=2024041900" > < / script >
2025-07-22 11:15:46 +08:00
< script src = "../../../webhelp/app/search/index/keywords.js?buildId=20250519091401" > < / script >
2025-04-23 17:54:31 +08:00
< script defer = "defer" src = "../../../webhelp/app/commons.js?buildId=2024041900" > < / script >
< script defer = "defer" src = "../../../webhelp/app/topic.js?buildId=2024041900" > < / script >
< link rel = "stylesheet" type = "text/css" href = "../../../webhelp/template/css/aic-styles-web-internal.css?buildId=2024041900" / > < link rel = "stylesheet" type = "text/css" href = "../../../webhelp/template/css/notes.css?buildId=2024041900" / > < link rel = "stylesheet" type = "text/css" href = "../../../webhelp/template/css/aic-common.css?buildId=2024041900" / > < link rel = "stylesheet" type = "text/css" href = "../../../webhelp/template/css/aic-images.css?buildId=2024041900" / > < link rel = "stylesheet" type = "text/css" href = "../../../webhelp/template/css/footnote.css?buildId=2024041900" / > < link rel = "stylesheet" type = "text/css" href = "../../../webhelp/template/css/aic-highlight-changes.css?buildId=2024041900" / > < link rel = "stylesheet" type = "text/css" href = "../../../webhelp/template/css/search-in-header.css?buildId=2024041900" / > < link rel = "stylesheet" type = "text/css" href = "../../../webhelp/template/css/topic-body-list.css?buildId=2024041900" / > < / head >
2025-01-23 16:37:00 +08:00
< body id = "watchdog" class = "wh_topic_page frmBody" >
< a href = "#wh_topic_body" class = "sr-only sr-only-focusable" >
跳转到主要内容
< / a >
< header class = "navbar navbar-default wh_header" >
< div class = "container-fluid" >
2025-04-23 17:54:31 +08:00
< div xmlns:whc = "http://www.oxygenxml.com/webhelp/components" class = "wh_header_flex_container navbar-nav navbar-expand-md navbar-dark" >
2025-01-23 16:37:00 +08:00
< div class = "wh_logo_and_publication_title_container" >
< div class = "wh_logo_and_publication_title" >
2025-04-23 17:54:31 +08:00
< a href = "https://www.artinchip.com" class = " wh_logo d-none d-sm-block " > < img src = "../../../company-logo.png" alt = " RTOS SDK 使用指南 SDK 指南文件 " / > < / a >
< div class = " wh_publication_title " > < a href = "../../../index.html" > < span class = "booktitle" > < span class = "ph mainbooktitle" > RTOS SDK 使用指南< / span > < span class = "ph booktitlealt" > SDK 指南文件< / span > < / span > < / a > < / div >
2025-01-23 16:37:00 +08:00
< / div >
< / div >
< div class = "wh_top_menu_and_indexterms_link collapse navbar-collapse" id = "wh_top_menu_and_indexterms_link" >
< / div >
< div class = " wh_search_input navbar-form wh_topic_page_search search " role = "form" >
< form id = "searchForm" method = "get" role = "search" action = "../../../search.html" > < div > < input type = "search" placeholder = "搜索 " class = "wh_search_textfield" id = "textToSearch" name = "searchQuery" aria-label = "搜索查询" required = "required" / > < button type = "submit" class = "wh_search_button" aria-label = "搜索" > < span class = "search_input_text" > 搜索< / span > < / button > < / div > < / form >
2025-04-23 17:54:31 +08:00
< / div > < / div >
< / div >
< / header >
2025-01-23 16:37:00 +08:00
< div class = "container-fluid" id = "wh_topic_container" >
< div class = "row" >
< nav class = "wh_tools d-print-none navbar-expand-md" aria-label = "Tools" >
2025-04-23 17:54:31 +08:00
< div data-tooltip-position = "bottom" class = " wh_breadcrumb " > < ol class = "d-print-none" > < li > < span class = "home" > < a href = "../../../index.html" > < span > 主页< / span > < / a > < / span > < / li > < li > < div class = "topicref" data-id = "id" > < div class = "title" > < a href = "../../../topics/sdk/chapter-advanced-app.html" > 高级应用< / a > < div class = "wh-tooltip" > < p class = "shortdesc" > 系统、存储、多媒体、接口、安全等模块的详细配置和设计说明。< / p > < / div > < / div > < / div > < / li > < li > < div class = "topicref" data-id = "chapter-system" > < div class = "title" > < a href = "../../../topics/chapter-title/chapter-system.html" > 系统< / a > < div class = "wh-tooltip" > < p class = "shortdesc" > < / p > < / div > < / div > < / div > < / li > < li class = "active" > < div class = "topicref" data-id = "watchdog" > < div class = "title" > < a href = "../../../topics/sdk/watchdog/watchdog-user-guide.html" > Watchdog 使用指南< / a > < / div > < / div > < / li > < / ol > < / div >
2025-01-23 16:37:00 +08:00
< div class = "wh_right_tools" >
< button class = "wh_hide_highlight" aria-label = "切换搜索突出显示" title = "切换搜索突出显示" > < / button >
< button class = "webhelp_expand_collapse_sections" data-next-state = "collapsed" aria-label = "折叠截面" title = "折叠截面" > < / button >
2025-04-23 17:54:31 +08:00
< div class = " wh_navigation_links " > < span id = "topic_navigation_links" class = "navheader" >
< span class = "navprev" > < a class = "- topic/link link" href = "../../../topics/sdk/tsensor/tsensor-faq.html" title = "常见问题" aria-label = "上一主题: 常见问题" rel = "prev" > < / a > < / span >
< span class = "navnext" > < a class = "- topic/link link" href = "../../../topics/sdk/watchdog/watchdog-config-lite.html" title = "Watchdog 配置" aria-label = "下一主题: Watchdog 配置" rel = "next" > < / a > < / span > < / span > < / div >
2025-01-23 16:37:00 +08:00
< div class = " wh_print_link print d-none d-md-inline-block " > < button onClick = "window.print()" title = "打印此页" aria-label = "打印此页" > < / button > < / div >
2025-04-23 17:54:31 +08:00
< button type = "button" id = "wh_toc_button" class = "custom-toggler navbar-toggler collapsed wh_toggle_button navbar-light" aria-expanded = "false" aria-label = "Toggle publishing table of content" aria-controls = "wh_publication_toc" >
< span class = "navbar-toggler-icon" > < / span >
< / button >
2025-01-23 16:37:00 +08:00
< / div >
< / nav >
< / div >
< div class = "wh_content_area" >
< div class = "row" >
2025-04-23 17:54:31 +08:00
< nav id = "wh_publication_toc" class = "col-lg-3 col-md-3 col-sm-12 d-md-block d-none d-print-none" aria-label = "Table of Contents Container" >
< div id = "wh_publication_toc_content" >
2025-07-22 11:15:46 +08:00
< div class = " wh_publication_toc " data-tooltip-position = "right" > < span class = "expand-button-action-labels" > < span id = "button-expand-action" role = "button" aria-label = "Expand" > < / span > < span id = "button-collapse-action" role = "button" aria-label = "Collapse" > < / span > < span id = "button-pending-action" role = "button" aria-label = "Pending" > < / span > < / span > < ul role = "tree" aria-label = "Table of Contents" > < li role = "treeitem" > < div data-tocid = "revinfo_linux-d3752e463" class = "topicref" data-id = "revinfo_linux" data-state = "leaf" > < span role = "button" class = "wh-expand-btn" > < / span > < div class = "title" > < a href = "../../../topics/revinfo/revinfo_rtos.html" id = "revinfo_linux-d3752e463-link" > 修订记录< / a > < / div > < / div > < / li > < li role = "treeitem" aria-expanded = "false" > < div data-tocid = "id-d3752e480" class = "topicref" data-id = "id" data-state = "not-ready" > < span role = "button" tabindex = "0" aria-labelledby = "button-expand-action id-d3752e480-link" class = "wh-expand-btn" > < / span > < div class = "title" > < a href = "../../../topics/sdk/env/sdk-compile.html" id = "id-d3752e480-link" > SDK 编译< / a > < div class = "wh-tooltip" > < p class = "shortdesc" > 介绍不同编译环境下 SDK 的详细编译流程。< / p > < / div > < / div > < / div > < / li > < li role = "treeitem" aria-expanded = "false" > < div data-tocid = "id-d3752e604" class = "topicref" data-id = "id" data-state = "not-ready" > < span role = "button" tabindex = "0" aria-labelledby = "button-expand-action id-d3752e604-link" class = "wh-expand-btn" > < / span > < div class = "title" > < a href = "../../../topics/sdk/advanced/sdk-usage.html" id = "id-d3752e604-link" > 使用指南< / a > < div class = "wh-tooltip" > < p class = "shortdesc" > 命令详解，编译选项，镜像和分区配置，添加应用和驱动等的详细使用说明。< / p > < / div > < / div > < / div > < / li > < li role = "treeitem" aria-expanded = "false" > < div data-tocid = "concept_rcx_czh_pzb-d3752e1004" class = "topicref" data-id = "concept_rcx_czh_pzb" data-state = "not-ready" > < span role = "button" tabindex = "0" aria-labelledby = "button-expand-action concept_rcx_czh_pzb-d3752e1004-link" class = "wh-expand-btn" > < / span > < div class = "title" > < a href = "../../../topics/sdk/chapter-app.html" id = "concept_rcx_czh_pzb-d3752e1004-link" > 应用场景< / a > < div class = "wh-tooltip" > < p class = "shortdesc" > 描述了 SDK 在不同应用场景中的配置和使用， < / p > < / div > < / div > < / div > < / li > < li role = "treeitem" aria-expanded = "false" > < div data-tocid = "id-d3752e1848" class = "topicref" data-id = "id" data-state = "not-ready" > < span role = "button" tabindex = "0" aria-labelledby = "button-expand-action id-d3752e1848-link" class = "wh-expand-btn" > < / span > < div class = "title" > < a href = "../../../topics/sdk/peripheral/peripheral-intro.html" id = "id-d3752e1848-link" > 外设移植< / a > < div class = "wh-tooltip" > < p class = "shortdesc" > < span class = "ph" > CTP、U 盘、SD 卡、有线和无线网络< / span > 等外设的介绍和使用说明。< / p > < / div > < / div > < / div > < / li > < li role = "treeitem" aria-expanded = "false" > < div data-tocid = "id-d3752e2022" class = "topicref" data-id = "id" data-state = "not-ready" > < span role = "button" tabindex = "0" aria-labelledby = "button-expand-action id-d3752e2022-link" class = "wh-expand-btn" > < / span > < div class = "title" > < a href = "../../../topics/sdk/bringup/chapter-bringup.html" id = "id-d3752e2022-link" > BringUp< / a > < div class = "wh-tooltip" > < p class = "shortdesc" > 主要描述板卡的各项配置，使 SDK 的环境和板卡匹配，并确保 SDK 编译后的固件能够在板子上正常运行。< / p > < / div > < / div > < / div > < / li > < li role = "treeitem" aria-expanded = "true" > < div data-tocid = "id-d3752e2418" class = "topicref" data-id = "id" data-state = "expanded" > < span role = "button" tabindex = "0" aria-labelledby = "button-collapse-action id-d3752e2418-link" class = "wh-expand-btn" > < / span > < div class = "title" > < a href = "../../../topics/sdk/chapter-advanced-app.html" id = "id-d3752e2418-link" > 高级应用< / a > < div class = "wh-tooltip" > < p class = "shortdesc" > 系统、存储、多媒体、接口、安全等模块的详细配置和设计说明。< / p > < / div > < / div > < / div > < ul role = "group" class = "navbar-nav nav-list" > < li role = "treeitem" aria-expanded = "false" > < div data-tocid = "_0-d3752e2435" class
2025-04-23 17:54:31 +08:00
< / div >
< / nav >
2025-01-23 16:37:00 +08:00
2025-04-23 17:54:31 +08:00
< div class = "col-lg-9 col-md-9 col-sm-12" id = "wh_topic_body" >
< button id = "wh_close_publication_toc_button" class = "close-toc-button d-none" aria-label = "Toggle publishing table of content" aria-controls = "wh_publication_toc" aria-expanded = "true" >
< span class = "close-toc-icon-container" >
< span class = "close-toc-icon" > < / span >
< / span >
< / button >
2025-01-23 16:37:00 +08:00
2025-04-23 17:54:31 +08:00
< 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://aicdocco/taskstopics/sdk/watchdog/watchdog-user-guide.dita" > Edit online< / a > < / span > < h1 class = "- topic/title title topictitle1" id = "ariaid-title1" > Watchdog 使用指南< / h1 >
2025-07-22 11:15:46 +08:00
< div class = "date inPage" > 16 May 2025< / div > < div style = "color: gray;" >
2025-01-23 16:37:00 +08:00
Read time: 1 minute(s)
2025-04-23 17:54:31 +08:00
< / div >
< div class = "- topic/body concept/conbody body conbody" >
2025-07-22 11:15:46 +08:00
< p class = "- topic/p p" data-ofbid = "d106533e33__20250519091516" > 看门狗 (Watchdog, WDT)
2025-04-23 17:54:31 +08:00
定时器可以监控系统的健康状态，并在系统无法正常使用时，强制复位系统。看门狗内部有一个递减计数器，在系统正常运行期间，通过重置计数可以保证看门狗模块不触发复位。< / p >
< div class = "table-container" > < table class = "- topic/table table frame-all" id = "watchdog__table_pkr_nct_c1c" data-ofbid = "watchdog__table_pkr_nct_c1c" data-cols = "3" > < 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" > 术语定义< / span > < / caption > < colgroup > < col style = "width:14.306151645207438%" / > < col style = "width:28.898426323319025%" / > < col style = "width:56.79542203147353%" / > < / colgroup > < thead class = "- topic/thead thead" >
< tr class = "- topic/row" >
2025-07-22 11:15:46 +08:00
< th class = "- topic/entry entry colsep-1 rowsep-1" id = "watchdog__table_pkr_nct_c1c__entry__1" > < p class = "- topic/p p" data-ofbid = "d106533e54__20250519091516" > 术语< / p > < / th >
< th class = "- topic/entry entry colsep-1 rowsep-1" id = "watchdog__table_pkr_nct_c1c__entry__2" > < p class = "- topic/p p" data-ofbid = "d106533e58__20250519091516" > 定义< / p > < / th >
< th class = "- topic/entry entry colsep-0 rowsep-1" id = "watchdog__table_pkr_nct_c1c__entry__3" > < p class = "- topic/p p" data-ofbid = "d106533e62__20250519091516" > 注释说明< / p > < / th >
2025-04-23 17:54:31 +08:00
< / tr >
< / thead > < tbody class = "- topic/tbody tbody" >
< tr class = "- topic/row" >
2025-07-22 11:15:46 +08:00
< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "watchdog__table_pkr_nct_c1c__entry__1" > < p class = "- topic/p p" data-ofbid = "d106533e72__20250519091516" > WDT< / p > < / td >
< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "watchdog__table_pkr_nct_c1c__entry__2" > < p class = "- topic/p p" data-ofbid = "d106533e76__20250519091516" > Watchdog， < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" headers = "watchdog__table_pkr_nct_c1c__entry__3" > < p class = "- topic/p p" data-ofbid = "d106533e80__20250519091516" > 看门狗< / p > < / td >
2025-04-23 17:54:31 +08:00
< / tr >
< tr class = "- topic/row" >
2025-07-22 11:15:46 +08:00
< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "watchdog__table_pkr_nct_c1c__entry__1" > < p class = "- topic/p p" data-ofbid = "d106533e87__20250519091516" > clr_thd< / p > < / td >
< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "watchdog__table_pkr_nct_c1c__entry__2" > < p class = "- topic/p p" data-ofbid = "d106533e91__20250519091516" > Clear threshold< / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" headers = "watchdog__table_pkr_nct_c1c__entry__3" > < p class = "- topic/p p" data-ofbid = "d106533e95__20250519091516" > 清看门狗的计数时，当前计数必须要满足此门限< / p > < / td >
2025-04-23 17:54:31 +08:00
< / tr >
< tr class = "- topic/row" >
2025-07-22 11:15:46 +08:00
< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "watchdog__table_pkr_nct_c1c__entry__1" > < p class = "- topic/p p" data-ofbid = "d106533e102__20250519091516" > irq_thd< / p > < / td >
< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "watchdog__table_pkr_nct_c1c__entry__2" > < p class = "- topic/p p" data-ofbid = "d106533e106__20250519091516" > IRQ threshold< / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" headers = "watchdog__table_pkr_nct_c1c__entry__3" > < p class = "- topic/p p" data-ofbid = "d106533e110__20250519091516" > 看门狗产生中断的计数值< / p > < / td >
2025-04-23 17:54:31 +08:00
< / tr >
< tr class = "- topic/row" >
2025-07-22 11:15:46 +08:00
< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "watchdog__table_pkr_nct_c1c__entry__1" > < p class = "- topic/p p" data-ofbid = "d106533e117__20250519091516" > rst_thd< / p > < / td >
< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "watchdog__table_pkr_nct_c1c__entry__2" > < p class = "- topic/p p" data-ofbid = "d106533e121__20250519091516" > Reset threshold< / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" headers = "watchdog__table_pkr_nct_c1c__entry__3" > < p class = "- topic/p p" data-ofbid = "d106533e125__20250519091516" > 看门狗触发系统重启的门限值< / p > < / td >
2025-04-23 17:54:31 +08:00
< / tr >
< tr class = "- topic/row" >
2025-07-22 11:15:46 +08:00
< td class = "- topic/entry entry colsep-1 rowsep-0" headers = "watchdog__table_pkr_nct_c1c__entry__1" > < p class = "- topic/p p" data-ofbid = "d106533e132__20250519091516" > ping< / p > < / td >
< td class = "- topic/entry entry colsep-1 rowsep-0" headers = "watchdog__table_pkr_nct_c1c__entry__2" > < p class = "- topic/p p" data-ofbid = "d106533e136__20250519091516" > -< / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-0" headers = "watchdog__table_pkr_nct_c1c__entry__3" > < p class = "- topic/p p" data-ofbid = "d106533e140__20250519091516" > 指将看门狗的计时器清零，使其重新计数，俗称“喂狗”< / p > < / td >
2025-04-23 17:54:31 +08:00
< / tr >
< / tbody > < / table > < / div >
< section class = "- topic/section section" id = "watchdog__id3" data-ofbid = "watchdog__id3" > < h2 class = "- topic/title title sectiontitle" > Watchdog 功能说明< / h2 >
2025-01-23 16:37:00 +08:00
2025-07-22 11:15:46 +08:00
< p class = "- topic/p p" data-ofbid = "d106533e152__20250519091516" > Watchdog
2025-01-23 16:37:00 +08:00
V1.0
提供了下列系统监控和保护功能：< / p >
2025-04-23 17:54:31 +08:00
< ol class = "- topic/ol ol arabic simple" id = "watchdog__ol_rmx_cxh_bdc" data-ofbid = "watchdog__ol_rmx_cxh_bdc" >
2025-07-22 11:15:46 +08:00
< li class = "- topic/li li" data-ofbid = "d106533e161__20250519091516" >
< p class = "- topic/p p" data-ofbid = "d106533e163__20250519091516" > < strong class = "+ topic/ph hi-d/b ph b" > 中断信号通知< / strong > ： （ ） ， < / p >
< p class = "- topic/p p" data-ofbid = "d106533e168__20250519091516" > 中断信号通知可允许系统在被强制复位之前执行一些关键操作，例如保存当前状态或清理资源。< / p >
2025-04-23 17:54:31 +08:00
< / li >
2025-07-22 11:15:46 +08:00
< li class = "- topic/li li" data-ofbid = "d106533e172__20250519091516" >
< p class = "- topic/p p" data-ofbid = "d106533e174__20250519091516" > < strong class = "+ topic/ph hi-d/b ph b" > 计数器清零限制< / strong > ：仅在当前计数值满足某个门限（可配置）值时才能执行清零操作。< / p >
< p class = "- topic/p p" data-ofbid = "d106533e179__20250519091516" > 计数器清零限制有助于防止误操作导致的不必要复位，提高系统的可靠性。< / p >
2025-04-23 17:54:31 +08:00
< figure class = "- topic/fig fig fignone" id = "watchdog__fig_xwq_qct_c1c" data-ofbid = "watchdog__fig_xwq_qct_c1c" >
< br / > < div class = "imagecenter" > < img class = "- topic/image image imagecenter" id = "watchdog__image_smx_cxh_bdc" src = "../../../images/watchdog/wdt_clr_window.png" alt = "wdt_clr_window" / > < / 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 清零的窗口示意< / span > < / figcaption > < / figure >
< / li >
2025-07-22 11:15:46 +08:00
< li class = "- topic/li li" data-ofbid = "d106533e195__20250519091516" >
< p class = "- topic/p p" data-ofbid = "d106533e197__20250519091516" > < strong class = "+ topic/ph hi-d/b ph b" > 多通道配置< / strong > ：支持预先加载四个 Watchdog 的配置，运行时可一键切换。软件可以理解为多通道，目前只开放一个通道，即通道 0。< / p >
< p class = "- topic/p p" data-ofbid = "d106533e202__20250519091516" > 多通道配置适用于需要在不同工作模式间灵活切换的系统，增强了系统的适应性和灵活性。< / p >
2025-04-23 17:54:31 +08:00
< / li >
2025-07-22 11:15:46 +08:00
< li class = "- topic/li li" data-ofbid = "d106533e206__20250519091516" >
< p class = "- topic/p p" data-ofbid = "d106533e208__20250519091516" > < strong class = "+ topic/ph hi-d/b ph b" > 写失效保护机制< / strong > ：当配置了写失效，除了 OP 和 IRQ_STA 寄存器可读以外，其它寄存器均不可读。< / p >
< p class = "- topic/p p" data-ofbid = "d106533e213__20250519091516" > 写失效保护适用于上述所有功能操作，可防止意外或恶意的软件修改 Watchdog 配置，保证系统的安全稳定运行。< / p >
2025-04-23 17:54:31 +08:00
< figure class = "- topic/fig fig fignone" id = "watchdog__id5" data-ofbid = "watchdog__id5" >
< br / > < div class = "imagecenter" > < img class = "- topic/image image imagecenter" id = "watchdog__image_umx_cxh_bdc" src = "../../../images/watchdog/wdt_wr_protect.png" width = "384" alt = "wdt_wr_protect" / > < / 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" > Watchdog 写保护的状态迁移< / span > < / figcaption > < / figure >
2025-07-22 11:15:46 +08:00
< p class = "- topic/p p" data-ofbid = "d106533e228__20250519091516" > < a class = "- topic/xref xref" href = "watchdog-user-guide.html#watchdog__id5" > Watchdog 写保护的状态迁移< / a > 展示了不同状态下可进行的操作，以及如何进入和退出状态：< / p >
2025-04-23 17:54:31 +08:00
< ul class = "- topic/ul ul simple" id = "watchdog__ul_vmx_cxh_bdc" data-ofbid = "watchdog__ul_vmx_cxh_bdc" >
2025-07-22 11:15:46 +08:00
< li class = "- topic/li li" data-ofbid = "d106533e236__20250519091516" >
2025-04-23 17:54:31 +08:00
< dl class = "- topic/dl dl simple" id = "watchdog__dl_wmx_cxh_bdc" data-ofbid = "watchdog__dl_wmx_cxh_bdc" >
2025-07-22 11:15:46 +08:00
< dt class = "- topic/dt dt dlterm" data-ofbid = "d106533e242__20250519091516" > 写允许< / dt >
2025-04-23 17:54:31 +08:00
< dd class = "- topic/dd dd" >
2025-07-22 11:15:46 +08:00
< p class = "- topic/p p" data-ofbid = "d106533e247__20250519091516" > 普通状态，无任何权限限制，随时可重新配置计数器。< / p >
2025-04-23 17:54:31 +08:00
< / dd >
< / dl >
< / li >
2025-07-22 11:15:46 +08:00
< li class = "- topic/li li" data-ofbid = "d106533e254__20250519091516" >
2025-04-23 17:54:31 +08:00
< dl class = "- topic/dl dl simple" id = "watchdog__dl_xmx_cxh_bdc" data-ofbid = "watchdog__dl_xmx_cxh_bdc" >
2025-07-22 11:15:46 +08:00
< dt class = "- topic/dt dt dlterm" data-ofbid = "d106533e260__20250519091516" > 写保护< / dt >
2025-04-23 17:54:31 +08:00
< dd class = "- topic/dd dd" >
2025-07-22 11:15:46 +08:00
< p class = "- topic/p p" data-ofbid = "d106533e265__20250519091516" > 如果要重新配置 Watchdog 计时器，需先写入操作码 OP_WR_EN 解锁（进入“写允许”状态）。< / p >
2025-04-23 17:54:31 +08:00
< / dd >
< / dl >
< / li >
2025-07-22 11:15:46 +08:00
< li class = "- topic/li li" data-ofbid = "d106533e272__20250519091516" >
2025-04-23 17:54:31 +08:00
< dl class = "- topic/dl dl simple" id = "watchdog__dl_ymx_cxh_bdc" data-ofbid = "watchdog__dl_ymx_cxh_bdc" >
2025-07-22 11:15:46 +08:00
< dt class = "- topic/dt dt dlterm" data-ofbid = "d106533e278__20250519091516" > 写失效< / dt >
2025-04-23 17:54:31 +08:00
< dd class = "- topic/dd dd" >
2025-07-22 11:15:46 +08:00
< p class = "- topic/p p" data-ofbid = "d106533e283__20250519091516" > 此时 Watchdog 进入只读状态，只有 OP
2025-01-23 16:37:00 +08:00
寄存器可写（用于喂狗、切换通道）。从图中可以看到此状态不可逆，如果要修改 Watchdog 配置，必须要
reset 系统才可以。< / p >
2025-04-23 17:54:31 +08:00
< / dd >
< / dl >
< / li >
< / ul >
< / li >
2025-07-22 11:15:46 +08:00
< li class = "- topic/li li" data-ofbid = "d106533e292__20250519091516" >
< p class = "- topic/p p" data-ofbid = "d106533e294__20250519091516" > < strong class = "+ topic/ph hi-d/b ph b" > 支持操作码 (Operate Code)< / strong > ：支持多种操作码，如计时器清零、通道切换、写使能等，以实现更精细的控制。< / p >
2025-04-23 17:54:31 +08:00
< / li >
< / ol >
< / section >
< / div >
< / article > < / main > < / div >
2025-01-23 16:37:00 +08:00
2025-04-23 17:54:31 +08:00
< div class = " wh_child_links d-print-none " > < nav aria-label = "Child Links" role = "navigation" class = "- topic/related-links related-links" > < ul class = "ullinks" > < li class = "- topic/link link ulchildlink" > < strong > < a href = "../../../topics/sdk/watchdog/watchdog-config-lite.html" > Watchdog 配置< / a > < / strong > < / li > < li class = "- topic/link link ulchildlink" > < strong > < a href = "../../../topics/sdk/watchdog/watchdog-debug-lite.html" > 调试指南< / a > < / strong > < / li > < li class = "- topic/link link ulchildlink" > < strong > < a href = "../../../topics/sdk/watchdog/watchdog-test-guide-lite.html" > 测试指南< / a > < / strong > < / li > < li class = "- topic/link link ulchildlink" > < strong > < a href = "../../../topics/sdk/watchdog/watchdog-design-lite.html" > 设计说明< / a > < / strong > < / li > < / ul > < / nav > < / div >
2025-01-23 16:37:00 +08:00
< / div >
< / div >
< / div >
< / div >
< footer class = "navbar navbar-default wh_footer" >
< div class = " footer-container mx-auto " >
< title > footer def< / title >
2025-04-23 17:54:31 +08:00
< style >
2025-01-23 16:37:00 +08:00
.p1 {
font-family: FangZhengShuSong, Times, serif;
}
.p2 {
font-family: Arial, Helvetica, sans-serif;
}
.p3 {
font-family: "Lucida Console", "Courier New", monospace;
}
2025-04-23 17:54:31 +08:00
< / style >
2025-01-23 16:37:00 +08:00
< div class = "webhelp.fragment.footer" >
2025-04-23 17:54:31 +08:00
< p class = "p1" > Copyright © 2019-2025 广东匠芯创科技有限公司. All rights reserved.< / p >
< / div >
< div >
2025-01-23 16:37:00 +08:00
< div class = "generation_time" >
2025-07-22 11:15:46 +08:00
Update Time: 2025-05-19
2025-01-23 16:37:00 +08:00
< / div >
2025-04-23 17:54:31 +08:00
< / div >
2025-01-23 16:37:00 +08:00
< / div >
< / footer >
< div id = "go2top" class = "d-print-none" >
< span class = "oxy-icon oxy-icon-up" > < / span >
< / div >
< div id = "modal_img_large" class = "modal" >
< span class = "close oxy-icon oxy-icon-remove" > < / span >
< div id = "modal_img_container" > < / div >
< div id = "caption" > < / div >
< / div >
< script src = "${pd}/publishing/publishing-styles-AIC-template/js/custom.js" defer = "defer" > < / script >
< / body >
< / html >
