mirror of
https://gitee.com/Vancouver2017/luban-lite-t3e-pro.git
synced 2025-12-14 10:28:54 +00:00
215 lines
34 KiB
HTML
215 lines
34 KiB
HTML
<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-cn" lang="zh-cn" data-whc_version="26.0">
|
||
<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="初始化流程 I2C 模块驱动的初始化流程如下： 传输流程 在 master 驱动中，数据的传输由 xfer 发起，可以完成多个 msg 的传输。传输流程如下： I2C 模块总线信号 在 I2C 总线的数据传输过程，由 start/restart/stop 作为总线的控制信号。了解 I2C 模块中 start/restart/stop 信号的生成方式，有助于了解驱动的源码实现。 master ..."/><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/sdk/i2c/i2c_design_lite.html"/><meta name="DC.relation" content="../../../topics/sdk/i2c/i2c_design_lite.html"/><meta name="DC.relation" content="../../../topics/sdk/i2c/i2c_data_struct_2.html"/><meta name="DC.contributor" content="yan.wang"/><meta name="DC.creator" content="yan.wang"/><meta name="DC.date.modified" content="2024-01-15"/><meta name="DC.format" content="HTML5"/><meta name="DC.identifier" content="i2c_key_procedures"/><meta name="DC.language" content="zh-CN"/><title>关键流程设计</title><!-- Build number 2023110923. --><meta name="wh-path2root" content="../../../"/><meta name="wh-toc-id" content="i2c_key_procedures-d5856e5540"/><meta name="wh-source-relpath" content="topics/sdk/i2c/i2c_key_procedure.dita"/><meta name="wh-out-relpath" content="topics/sdk/i2c/i2c_key_procedure_2.html"/>
|
||
|
||
<link rel="stylesheet" type="text/css" href="../../../webhelp/app/commons.css?buildId=2023110923"/>
|
||
<link rel="stylesheet" type="text/css" href="../../../webhelp/app/topic.css?buildId=2023110923"/>
|
||
|
||
<script src="../../../webhelp/app/options/properties.js?buildId=20250121171154"></script>
|
||
<script src="../../../webhelp/app/localization/strings.js?buildId=2023110923"></script>
|
||
<script src="../../../webhelp/app/search/index/keywords.js?buildId=20250121171154"></script>
|
||
<script defer="defer" src="../../../webhelp/app/commons.js?buildId=2023110923"></script>
|
||
<script defer="defer" src="../../../webhelp/app/topic.js?buildId=2023110923"></script>
|
||
<link rel="stylesheet" type="text/css" href="../../../webhelp/template/aic-styles-web.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/notes.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/aic-common.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/aic-images.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/footnote.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/aic-web-watermark.css?buildId=2023110923"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/topic-body-list.css?buildId=2023110923"/></head>
|
||
|
||
<body id="i2c_key_procedures" 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">
|
||
<div class="wh_header_flex_container navbar-nav navbar-expand-md navbar-dark">
|
||
<div class="wh_logo_and_publication_title_container">
|
||
<div class="wh_logo_and_publication_title">
|
||
|
||
<a href="http://www.artinchip.com" class=" wh_logo d-none d-sm-block "><img src="../../../company-logo-white.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>
|
||
|
||
</div>
|
||
|
||
|
||
</div>
|
||
|
||
<div class="wh_top_menu_and_indexterms_link collapse navbar-collapse" id="wh_top_menu_and_indexterms_link">
|
||
|
||
|
||
|
||
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</header>
|
||
|
||
|
||
|
||
|
||
<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>
|
||
|
||
|
||
|
||
</div>
|
||
|
||
<div class="container-fluid" id="wh_topic_container">
|
||
<div class="row">
|
||
|
||
<nav class="wh_tools d-print-none navbar-expand-md" aria-label="Tools">
|
||
|
||
<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="concept_nww_hzh_pzb"><div class="title"><a href="../../../topics/chapter-title/chapter-interface-sdk.html">接口</a><div class="wh-tooltip"><p class="shortdesc">CAN<span class="ph">、CAP</span>、CIR、GPAI、GPIO、I2C、PSADC、PWM 等接口模块的介绍和使用说明。</p></div></div></div></li><li><div class="topicref" data-id="i2c_user_guide"><div class="title"><a href="../../../topics/sdk/i2c/i2c_user_guide_2.html">I2C 使用指南</a></div></div></li><li><div class="topicref" data-id="id"><div class="title"><a href="../../../topics/sdk/i2c/i2c_design_lite.html">设计说明</a></div></div></li><li class="active"><div class="topicref" data-id="i2c_key_procedures"><div class="title"><a href="../../../topics/sdk/i2c/i2c_key_procedure_2.html">关键流程设计</a></div></div></li></ol></div>
|
||
|
||
|
||
|
||
<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>
|
||
<div class=" wh_navigation_links "><span id="topic_navigation_links" class="navheader">
|
||
|
||
<span class="navprev"><a class="- topic/link link" href="../../../topics/sdk/i2c/i2c_design_lite.html" title="设计说明" aria-label="上一主题: 设计说明" rel="prev"></a></span>
|
||
<span class="navnext"><a class="- topic/link link" href="../../../topics/sdk/i2c/i2c_data_struct_2.html" title="数据结构设计" aria-label="下一主题: 数据结构设计" rel="next"></a></span> </span></div>
|
||
|
||
|
||
|
||
<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>
|
||
|
||
<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>
|
||
</div>
|
||
|
||
</nav>
|
||
</div>
|
||
|
||
|
||
|
||
|
||
<div class="wh_content_area">
|
||
<div class="row">
|
||
|
||
<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">
|
||
|
||
<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-d5856e989" 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-d5856e989-link">修订记录</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d5856e1003" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d5856e1003-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/env/sdk-compile.html" id="id-d5856e1003-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-d5856e1152" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d5856e1152-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/advanced/sdk-usage.html" id="id-d5856e1152-link">使用指南</a><div class="wh-tooltip"><p class="shortdesc">系统镜像、编译选项、开发板、应用等相关的详细使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_rcx_czh_pzb-d5856e1416" 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-d5856e1416-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/chapter-app.html" id="concept_rcx_czh_pzb-d5856e1416-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，包括系统更新、OTA、安全方案等。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d5856e2119" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d5856e2119-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/peripheral/peripheral-intro.html" id="id-d5856e2119-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-d5856e2244" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d5856e2244-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/bringup/chapter-bringup.html" id="id-d5856e2244-link">BringUp</a><div class="wh-tooltip"><p class="shortdesc">在硬件上电后快速初始化系统，为操作系统的启动准备好必要的硬件环境。</p></div></div></div></li><li role="treeitem" aria-expanded="true"><div data-tocid="id-d5856e2345" class="topicref" data-id="id" data-state="expanded"><span role="button" tabindex="0" aria-labelledby="button-collapse-action id-d5856e2345-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/chapter-advanced-app.html" id="id-d5856e2345-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-d5856e2360" class="topicref" data-id="_0" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action _0-d5856e2360-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/boot/lite_boot_direct.html" id="_0-d5856e2360-link">启动引导</a><div class="wh-tooltip"><p class="shortdesc">启动引导程序 Bootloader 可以实现加载启动应用程序、 烧录和升级功能。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-system-d5856e2435" class="topicref" data-id="chapter-system" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-system-d5856e2435-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-system.html" id="chapter-system-d5856e2435-link">系统</a><div class="wh-tooltip"><p class="shortdesc"></p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-memory-d5856e3357" class="topicref" data-id="chapter-memory" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-memory-d5856e3357-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-memory-sdk.html" id="chapter-memory-d5856e3357-link">存储</a><div class="wh-tooltip"><p class="shortdesc">SDMC、SPI NAND、SPI NOR<span class="ph"> 以及文件系统</span> 等存储模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_mcc_32s_nbc-d5856e3639" class="topicref" data-id="concept_mcc_32s_nbc" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_mcc_32s_nbc-d5856e3639-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-multi-media-sdk.html" id="concept_mcc_32s_nbc-d5856e3639-link">多媒体</a><div class="wh-tooltip"><p class="shortdesc">GE、VE、Display、DVP、MPP、MPP 播放器等多媒体模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="true"><div data-tocid="concept_nww_hzh_pzb-d5856e4868" class="topicref" data-id="concept_nww_hzh_pzb" data-state="expanded"><span role="button" tabindex="0" aria-labelledby="button-collapse-action concept_nww_hzh_pzb-d5856e4868-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-interface-sdk.html" id="concept_nww_hzh_pzb-d5856e4868-link">接口</a><div class="wh-tooltip"><p class="shortdesc">CAN<span class="ph">、CAP</span>、CIR、GPAI、GPIO、I2C、PSADC、PWM 等接口模块的介绍和使用说明。</p></div></div></div><ul role="group" class="navbar-nav nav-list"><li role="treeitem" aria-expanded="false"><div data-tocid="can-d5856e4886" class="topicref" data-id="can" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action can-d5856e4886-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/can/can_user_guide_2.html" id="can-d5856e4886-link">CAN 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d5856e4958" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d5856e4958-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/cap/cap_user_guide.html" id="id-d5856e4958-link">CAP 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d5856e5018" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d5856e5018-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/qep/qep_user_guide.html" id="id-d5856e5018-link">QEP 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="cir-d5856e5228" class="topicref" data-id="cir" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action cir-d5856e5228-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/cir/cir_user_guide_2.html" id="cir-d5856e5228-link">CIR 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="gpai-user-guide-d5856e5336" class="topicref" data-id="gpai-user-guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action gpai-user-guide-d5856e5336-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/gpai/gpai_user_guide_2.html" id="gpai-user-guide-d5856e5336-link">GPAI 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d5856e5408" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d5856e5408-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/gpio/gpio_user_guide.html" id="id-d5856e5408-link">GPIO 使用指南</a></div></div></li><li role="treeitem" aria-expanded="true"><div data-tocid="i2c_user_guide-d5856e5480" class="topicref" data-id="i2c_user_guide" data-state="expanded"><span role="button" tabindex="0" aria-labelledby="button-collapse-action i2c_user_guide-d5856e5480-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/i2c/i2c_user_guide_2.html" id="i2c_user_guide-d5856e5480-link">I2C 使用指南</a></div></div><ul role="group" class="navbar-nav nav-list"><li role="treeitem"><div data-tocid="id-d5856e5492" class="topicref" data-id="id" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/i2c/i2c_config_lite.html" id="id-d5856e5492-link">参数配置</a></div></div></li><li role="treeitem"><div data-tocid="id-d5856e5504" class="topicref" data-id="id" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/i2c/i2c_debug_lite.html" id="id-d5856e5504-link">调试指南</a></div></div></li><li role="treeitem"><div data-tocid="id-d5856e5516" class="topicref" data-id="id" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/i2c/i2c_test_lite.html" id="id-d5856e5516-link">测试指南</a></div></div></li><li role="treeitem" aria-expanded="true"><div data-tocid="id-d5856e5528" class="topicref" data-id="id" data-state="expanded"><span role="button" tabindex="0" aria-labelledby="button-collapse-action id-d5856e5528-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/i2c/i2c_design_lite.html" id="id-d5856e5528-link">设计说明</a></div></div><ul role="group" class="navbar-nav nav-list"><li role="treeitem" class="active"><div data-tocid="i2c_key_procedures-d5856e5540" class="topicref" data-id="i2c_key_procedures" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/i2c/i2c_key_procedure_2.html" id="i2c_key_procedures-d5856e5540-link">关键流程设计</a></div></div></li><li role="treeitem"><div data-tocid="i2c_data_structure_design-d5856e5552" class="topicref" data-id="i2c_data_structure_design" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/i2c/i2c_data_struct_2.html" id="i2c_data_structure_design-d5856e5552-link">数据结构设计</a></div></div></li><li role="treeitem"><div data-tocid="i2c_interface_design_luban_lite-d5856e5564" class="topicref" data-id="i2c_interface_design_luban_lite" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/i2c/i2c_interface_lite.html" id="i2c_interface_design_luban_lite-d5856e5564-link">接口设计</a></div></div></li></ul></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d5856e5576" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d5856e5576-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/psadc/psadc_user_guide_2.html" id="id-d5856e5576-link">PSADC 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d5856e5648" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d5856e5648-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/pwm/pwm_user_guide_2.html" id="id-d5856e5648-link">PWM 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="rtp-user-guide-d5856e5721" class="topicref" data-id="rtp-user-guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action rtp-user-guide-d5856e5721-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/rtp/rtp_user_guide_2.html" id="rtp-user-guide-d5856e5721-link">RTP 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="spi-d5856e5805" class="topicref" data-id="spi" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action spi-d5856e5805-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/spi/spi_user_guide_2.html" id="spi-d5856e5805-link"><span class="ph">Q</span>SPI 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="uart_user_guide-d5856e5879" class="topicref" data-id="uart_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action uart_user_guide-d5856e5879-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/uart/uart_user_guide_2.html" id="uart_user_guide-d5856e5879-link">UART 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="usb_user_guide-d5856e5951" class="topicref" data-id="usb_user_guide" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action usb_user_guide-d5856e5951-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/usb/usb_user_guide_2.html" id="usb_user_guide-d5856e5951-link">USB 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d5856e6011" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d5856e6011-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/mac/mac_user_guide_2.html" id="id-d5856e6011-link">MAC 使用指南</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-safety-d5856e6083" class="topicref" data-id="chapter-safety" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-safety-d5856e6083-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-safety-sdk.html" id="chapter-safety-d5856e6083-link">安全</a><div class="wh-tooltip"><p class="shortdesc">SPI ENC、CE、eFuse 等安全模块的介绍和使用说明。</p></div></div></div></li></ul></li></ul></div>
|
||
|
||
</div>
|
||
</nav>
|
||
|
||
|
||
<div class="col-lg-7 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>
|
||
<button id="wh_close_topic_toc_button" class="close-toc-button d-none" aria-label="Toggle topic table of content" aria-controls="wh_topic_toc" aria-expanded="true">
|
||
<span class="close-toc-icon-container">
|
||
<span class="close-toc-icon"></span>
|
||
</span>
|
||
</button>
|
||
|
||
<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/i2c/i2c_key_procedure.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">关键流程设计</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
|
||
Read time: 1 minute(s)
|
||
</div><div class="- topic/body concept/conbody body conbody"><section class="- topic/section section" id="i2c_key_procedures__section_unt_y5r_21c" data-ofbid="i2c_key_procedures__section_unt_y5r_21c"><h2 class="- topic/title title sectiontitle">初始化流程</h2><p class="- topic/p p" data-ofbid="d301841e27__20250121171807">I2C 模块驱动的初始化流程如下：</p><p class="- topic/p p" data-ofbid="d301841e29__20250121171807"></p><div class="- topic/p p" data-ofbid="d301841e30__20250121171807"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="i2c_key_procedures__image_rfy_y1l_g1c" src="../../../images/i2c/i2c_design_init_rtos.png" width="144" alt="i2c_design_init_rtos"/></div><br/></div></section><section class="- topic/section section" id="i2c_key_procedures__section_ul2_xvr_21c" data-ofbid="i2c_key_procedures__section_ul2_xvr_21c"><h2 class="- topic/title title sectiontitle">传输流程</h2><p class="- topic/p p" data-ofbid="d301841e37__20250121171807">在 master 驱动中，数据的传输由 xfer 发起，可以完成多个 msg 的传输。传输流程如下：</p><div class="- topic/p p" data-ofbid="d301841e39__20250121171807"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="i2c_key_procedures__image_xnt_y5r_21c" src="../../../images/i2c/i2c_design_xfer.png" width="192" alt="i2c_design_xfer"/></div><br/></div></section><section class="- topic/section section" id="i2c_key_procedures__section_ynt_y5r_21c" data-ofbid="i2c_key_procedures__section_ynt_y5r_21c"><h2 class="- topic/title title sectiontitle">I2C 模块总线信号</h2>
|
||
|
||
<div class="- topic/p p" data-ofbid="d301841e48__20250121171807">在 I2C 总线的数据传输过程，由 start/restart/stop 作为总线的控制信号。了解 I2C 模块中 start/restart/stop
|
||
信号的生成方式，有助于了解驱动的源码实现。<ul class="- topic/ul ul" id="i2c_key_procedures__ul_ab5_4vr_21c" data-ofbid="i2c_key_procedures__ul_ab5_4vr_21c"><li class="- topic/li li" data-ofbid="d301841e51__20250121171807">master transmitter<div class="- topic/p p" data-ofbid="d301841e53__20250121171807"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="i2c_key_procedures__image_a4t_y5r_21c" src="../../../images/i2c/i2c_master_transmitter.png" alt="master transmitter"/></div><br/></div><p class="- topic/p p" data-ofbid="d301841e57__20250121171807">对图中 3 个关键点的解释：</p><ol class="- topic/ol ol" id="i2c_key_procedures__ol_b4t_y5r_21c" data-ofbid="i2c_key_procedures__ol_b4t_y5r_21c"><li class="- topic/li li" data-ofbid="d301841e60__20250121171807">
|
||
<p class="- topic/p p" data-ofbid="d301841e62__20250121171807">I2C 作为 transmitter 时，当向 TXFIFO 中写入数据时，I2C 模块会自动发出 start 信号</p>
|
||
</li><li class="- topic/li li" data-ofbid="d301841e65__20250121171807">
|
||
<p class="- topic/p p" data-ofbid="d301841e67__20250121171807">若 stop 位未置位，则当 TXFIFO 中的数据全部发送，TXFIFO 为空时，会保持 SCL 为低电平，直到再次向
|
||
TXFIFO 中写入数据</p>
|
||
</li><li class="- topic/li li" data-ofbid="d301841e70__20250121171807">
|
||
<p class="- topic/p p" data-ofbid="d301841e72__20250121171807">再次向 TXFIFO 写入数据时，将 stop 位置 1，则在完成该字节的发送后，master 会自动发送 stop 信号</p>
|
||
</li></ol></li><li class="- topic/li li" data-ofbid="d301841e75__20250121171807">master receiver<div class="- topic/p p" data-ofbid="d301841e77__20250121171807"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="i2c_key_procedures__image_d4t_y5r_21c" src="../../../images/i2c/i2c_master_receiver.png" alt="master receiver"/></div><br/></div><p class="- topic/p p" data-ofbid="d301841e81__20250121171807">对图中 3 个关键点的解释：</p><ol class="- topic/ol ol" id="i2c_key_procedures__ol_e4t_y5r_21c" data-ofbid="i2c_key_procedures__ol_e4t_y5r_21c"><li class="- topic/li li" data-ofbid="d301841e84__20250121171807">
|
||
<p class="- topic/p p" data-ofbid="d301841e86__20250121171807">I2C 作为 receiver 时，当向 TXFIFO 写入读命令(即向 I2C_DATA_CMD 写入读命令) 时，I2C
|
||
模块会自动发送 start 信号</p>
|
||
</li><li class="- topic/li li" data-ofbid="d301841e89__20250121171807">
|
||
<p class="- topic/p p" data-ofbid="d301841e91__20250121171807">当接收到 slave 端发送的数据后，只有再次发送一次读命令，才会对本次收到的数据恢复 ACK 确认信号</p>
|
||
</li><li class="- topic/li li" data-ofbid="d301841e94__20250121171807">
|
||
<p class="- topic/p p" data-ofbid="d301841e96__20250121171807">master 在接收到最后一个数据后，回复 NACK，slave 端才会结束数据的传送。在发送最后一个读命令时，同时将 stop
|
||
位置位，则 master 在接收到 slave 发送的数据后，I2C 模块会自动发送 NACK 信号</p>
|
||
</li></ol></li></ul></div>
|
||
<div class="- topic/note note note note_note" id="i2c_key_procedures__note_vyr_qvr_21c" data-ofbid="i2c_key_procedures__note_vyr_qvr_21c"><span class="note__title">注：</span>
|
||
<p class="- topic/p p" data-ofbid="d301841e102__20250121171807">I2C 模块的数据传输，无论是 transmitter 还是 receiver，都会用到 TXFIFO，transmitter 时用来发送数据，receiver
|
||
时用来发送命令。所以，中断处理中，触发 TXFIFO_EMPTY 中断的，可能是 msg，也可能是 write msg</p>
|
||
</div>
|
||
</section><section class="- topic/section section" id="i2c_key_procedures__section_c4t_y5r_21c" data-ofbid="i2c_key_procedures__section_c4t_y5r_21c"><h2 class="- topic/title title sectiontitle">中断流程</h2><div class="- topic/p p" data-ofbid="d301841e109__20250121171807"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="i2c_key_procedures__image_f4t_y5r_21c" src="../../../images/i2c/i2c_design_interrupt.png" width="384" alt="i2c_design_interrupt"/></div><br/></div></section></div></article></main></div>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
</div>
|
||
|
||
<nav role="navigation" id="wh_topic_toc" aria-label="On this page" class="col-lg-2 d-none d-lg-block navbar d-print-none">
|
||
<div id="wh_topic_toc_content">
|
||
|
||
<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#i2c_key_procedures__section_unt_y5r_21c" data-tocid="i2c_key_procedures__section_unt_y5r_21c">初始化流程</a></div></li><li class="section-item"><div class="section-title"><a href="#i2c_key_procedures__section_ul2_xvr_21c" data-tocid="i2c_key_procedures__section_ul2_xvr_21c">传输流程</a></div></li><li class="section-item"><div class="section-title"><a href="#i2c_key_procedures__section_ynt_y5r_21c" data-tocid="i2c_key_procedures__section_ynt_y5r_21c">I2C 模块总线信号</a></div></li><li class="section-item"><div class="section-title"><a href="#i2c_key_procedures__section_c4t_y5r_21c" data-tocid="i2c_key_procedures__section_c4t_y5r_21c">中断流程</a></div></li></ul></div>
|
||
|
||
</div>
|
||
</nav>
|
||
|
||
</div>
|
||
</div>
|
||
|
||
|
||
|
||
</div>
|
||
<footer class="navbar navbar-default wh_footer">
|
||
<div class=" footer-container mx-auto ">
|
||
<title>footer def</title>
|
||
<style><!--
|
||
|
||
.p1 {
|
||
font-family: FangZhengShuSong, Times, serif;
|
||
}
|
||
.p2 {
|
||
font-family: Arial, Helvetica, sans-serif;
|
||
}
|
||
.p3 {
|
||
font-family: "Lucida Console", "Courier New", monospace;
|
||
}
|
||
|
||
--></style>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<div class="webhelp.fragment.footer">
|
||
<p class="p1">Copyright © 2019-2024 广东匠芯创科技有限公司. All rights reserved.</p>
|
||
</div><div>
|
||
<div class="generation_time">
|
||
Update Time: 2025-01-21
|
||
</div>
|
||
</div>
|
||
</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> |