wen/luban-lite-t3e-pro
1
0
Fork 0
mirror of https://gitee.com/Vancouver2017/luban-lite-t3e-pro.git synced 2025-12-14 18:38:55 +00:00
Code Issues Packages Projects Releases Wiki Activity
Files
b4033d8696b77dddcafce4e00eaaf2a01ccc38fb
luban-lite-t3e-pro/doc/topics/sdk/dma/dma-interface-design-lite.html

296 lines
53 KiB
HTML
Raw Normal View History

add doc v1.1.2
2025-01-23 16:37:00 +08:00
<!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="Driver 层接口设计 以下接口是遵循 Linux DMA Engine 子系统的标准接口。 表 1 . dmaengine_slave_config 函数原型 int dmaengine_slave_config(struct dma_chan *chan, struct dma_slave_config *config) 功能说明 配置指定的 DMA 物理通道 参数定义 chan - ..."/><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/dma/dma-design-guide-lite.html"/><meta name="DC.relation" content="../../../topics/sdk/dma/dma-data-structure_2.html"/><meta name="DC.relation" content="../../../topics/sdk/dma/dma-demo-lite.html"/><meta name="DC.contributor" content="yan.wang"/><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="concept_lws_bsf_h1c"/><meta name="DC.language" content="zh-CN"/><title>接口设计</title><!-- Build number 2023110923. --><meta name="wh-path2root" content="../../../"/><meta name="wh-toc-id" content="concept_lws_bsf_h1c-d5856e2781"/><meta name="wh-source-relpath" content="topics/sdk/dma/dma-interface-design-lite.dita"/><meta name="wh-out-relpath" content="topics/sdk/dma/dma-interface-design-lite.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="concept_lws_bsf_h1c" 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="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><div class="topicref" data-id="concept_or5_kn3_pzb"><div class="title"><a href="../../../topics/sdk/dma/dma-user-guide_2.html">DMA 使用指南</a></div></div></li><li><div class="topicref" data-id="id"><div class="title"><a href="../../../topics/sdk/dma/dma-design-guide-lite.html">设计说明</a></div></div></li><li class="active"><div class="topicref" data-id="concept_lws_bsf_h1c"><div class="title"><a href="../../../topics/sdk/dma/dma-interface-design-lite.html">接口设计</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/dma/dma-data-structure_2.html" title="数据结构设计" aria-label="上一主题: 数据结构设计" rel="prev"></a></span>
<span class="navnext"><a class="- topic/link link" href="../../../topics/sdk/dma/dma-demo-lite.html" title="Demo" aria-label="下一主题: Demo" 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"><spa
</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/dma/dma-interface-design-lite.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">接口设计</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
Read time: 3 minute(s)
</div><div class="- topic/body concept/conbody body conbody"><section class="- topic/section section" id="concept_lws_bsf_h1c__section_rhb_syt_mdc" data-ofbid="concept_lws_bsf_h1c__section_rhb_syt_mdc"><h2 class="- topic/title title sectiontitle">Driver 层接口设计</h2>
<p class="- topic/p p" data-ofbid="d63706e31__20250121171521">以下接口是遵循 Linux DMA Engine 子系统的标准接口。</p>
<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_tqc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_tqc_33d_bdc" data-cols="2"><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">dmaengine_slave_config</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__2">int dmaengine_slave_config(struct dma_chan *chan, struct
dma_slave_config *config)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__2">配置指定的 DMA 物理通道</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">chan - 指向一个 DMA 物理通道</div>
<div class="- topic/div div">config - 保存了需要的配置信息</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__2">0，成功</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_tqc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_uqc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_uqc_33d_bdc" data-cols="2"><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"> 2</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dmaengine_pause</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__2">int dmaengine_pause(struct dma_chan *chan)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__2">暂停指定通道的传输操作</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__2">chan - 指向一个 DMA 物理通道</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__2">0，成功</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_uqc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_vqc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_vqc_33d_bdc" data-cols="2"><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"> 3</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dmaengine_resume</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__2">int dmaengine_resume(struct dma_chan *chan)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__2">恢复指定通道的传输操作</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__2">chan - 指向一个 DMA 物理通道</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__2">0，成功</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_vqc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_wqc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_wqc_33d_bdc" data-cols="2"><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"> 4</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dmaengine_prep_dma_memcpy</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">int dmaengine_prep_dma_memcpy(struct dma_chan *chan,</div>
<div class="- topic/div div">uint32_t dest, uint32_t src, uint32_t len)</div>
</div>
</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__2">memcpy 操作的预处理</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">chan - 指向一个 DMA 物理通道</div>
<div class="- topic/div div">dest - 目标 Buffer 的物理地址</div>
<div class="- topic/div div">src - 源 Buffer 的物理地址</div>
<div class="- topic/div div">len - 数据长度</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__2">0，成功；&lt;0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_wqc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_xqc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_xqc_33d_bdc" data-cols="2"><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"> 5</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dmaengine_prep_dma_device</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">int dmaengine_prep_dma_device(struct dma_chan *chan,</div>
<div class="- topic/div div">uint32_t dest, uint32_t src, uint32_t len,</div>
<div class="- topic/div div">enum dma_transfer_direction dir)</div>
</div>
</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__2">设备与内存之间传输操作的预处理</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">chan - 指向一个 DMA 物理通道</div>
<div class="- topic/div div">dest - 目标 Buffer 的物理地址</div>
<div class="- topic/div div">src - 源 Buffer 的物理地址</div>
<div class="- topic/div div">len - 数据长度</div>
<div class="- topic/div div">dir - 传输方向，是 Dev to Mem，还是 Mem to Dev</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__2">0，成功；&lt;0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_xqc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_yqc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_yqc_33d_bdc" data-cols="2"><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"> 6</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dmaengine_prep_dma_cyclic </span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">int dmaengine_prep_dma_cyclic(struct dma_chan *chan,</div>
<div class="- topic/div div">uint32_t buf_addr, uint32_t buf_len, uint32_t
period_len,</div>
<div class="- topic/div div">enum dma_transfer_direction dir)</div>
</div>
</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__2">（设备与内存之间）循环传输操作的预处理</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">chan - 指向一个 DMA 物理通道</div>
<div class="- topic/div div">buf_addr - 循环 Buffer 的起始物理地址</div>
<div class="- topic/div div">buf_len - 循环 Buffer 的总长度</div>
<div class="- topic/div div">period_len - 循环的 Buffer 片段长度</div>
<div class="- topic/div div">dir - 传输方向，是 Dev to Mem，还是 Mem to Dev</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__2">0，成功；&lt;0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_yqc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_zqc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_zqc_33d_bdc" data-cols="2"><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"> 7</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dma_async_issue_pending </span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__2">void dma_async_issue_pending(struct dma_chan *chan)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__2">启动指定通道的数据传输</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__2">chan - 指向一个 DMA 物理通道</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_zqc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_arc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_arc_33d_bdc" data-cols="2"><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"> 8</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dmaengine_terminate_async </span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__2">int dmaengine_terminate_async(struct dma_chan *chan)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__2">终止指定通道的数据传输</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__2">chan - 指向一个 DMA 物理通道</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__2">0，成功</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_arc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="concept_lws_bsf_h1c__table_brc_33d_bdc" data-ofbid="concept_lws_bsf_h1c__table_brc_33d_bdc" data-cols="2"><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"> 9</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">dmaengine_tx_status </span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__2">enum dma_status dmaengine_tx_status(struct dma_chan *chan,
uint32_t *residue)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__2">获取指定通道的传输状态</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">chan - 指向一个 DMA 物理通道</div>
<div class="- topic/div div">residue - 还没有传输完成的剩余长度，单位：字节</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__2">DMA_COMPLETE，传输完成；DMA_IN_PROGRESS，传输中</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_lws_bsf_h1c__table_brc_33d_bdc__entry__2">-</td></tr></tbody></table></div>
</section><section class="- topic/section section" id="concept_lws_bsf_h1c__section_ozs_5yt_mdc" data-ofbid="concept_lws_bsf_h1c__section_ozs_5yt_mdc"><h2 class="- topic/title title sectiontitle">HAL 层接口设计</h2>
<div class="- topic/p p" data-ofbid="d63706e448__20250121171521">HAL 层的函数接口声明存放在 <span class="+ topic/ph sw-d/filepath ph filepath">hal_dma.h</span>
中，主要接口有：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_lws_bsf_h1c__codeblock_omj_rvy_bdc" data-ofbid="concept_lws_bsf_h1c__codeblock_omj_rvy_bdc"><strong class="hl-keyword">int</strong> hal_dma_chan_prep_memset(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan,
uint32_t p_dest,
uint32_t value,
uint32_t len);
<strong class="hl-keyword">int</strong> hal_dma_chan_prep_memcpy(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan,
uint32_t p_dest,
uint32_t p_src,
uint32_t len);
<strong class="hl-keyword">int</strong> hal_dma_chan_prep_device(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan,
uint32_t p_dest,
uint32_t p_src,
uint32_t len,
<strong class="hl-keyword">enum</strong> dma_transfer_direction dir);
<strong class="hl-keyword">int</strong> hal_dma_chan_prep_cyclic(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan,
uint32_t p_buf_addr,
uint32_t buf_len,
uint32_t period_len,
<strong class="hl-keyword">enum</strong> dma_transfer_direction dir);
<strong class="hl-keyword">int</strong> hal_dma_chan_tx_status(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan, uint32_t *left_size);
<strong class="hl-keyword">int</strong> hal_dma_chan_start(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan);
<strong class="hl-keyword">int</strong> hal_dma_chan_stop(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan);
<strong class="hl-keyword">int</strong> hal_dma_chan_pause(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan);
<strong class="hl-keyword">int</strong> hal_dma_chan_resume(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan);
<strong class="hl-keyword">int</strong> hal_dma_chan_terminate_all(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan);
<strong class="hl-keyword">int</strong> hal_dma_chan_register_cb(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan,
dma_async_callback callback,
<strong class="hl-keyword">void</strong> *callback_param);
<strong class="hl-keyword">int</strong> hal_dma_chan_config(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan,
<strong class="hl-keyword">struct</strong> dma_slave_config *config);
<strong class="hl-keyword">int</strong> hal_release_dma_chan(<strong class="hl-keyword">struct</strong> aic_dma_chan *chan);
<strong class="hl-keyword">struct</strong> aic_dma_chan * hal_request_dma_chan(<strong class="hl-keyword">void</strong>);
<strong class="hl-keyword">int</strong> hal_dma_init(<strong class="hl-keyword">void</strong>);
<strong class="hl-keyword">int</strong> hal_dma_deinit(<strong class="hl-keyword">void</strong>);
<strong class="hl-keyword">int</strong> hal_dma_chan_dump(<strong class="hl-keyword">int</strong> ch_nr);
irqreturn_t hal_dma_irq(<strong class="hl-keyword">int</strong> irq, <strong class="hl-keyword">void</strong> *arg);</pre></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="#concept_lws_bsf_h1c__section_rhb_syt_mdc" data-tocid="concept_lws_bsf_h1c__section_rhb_syt_mdc">Driver 层接口设计</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_lws_bsf_h1c__section_ozs_5yt_mdc" data-tocid="concept_lws_bsf_h1c__section_ozs_5yt_mdc">HAL 层接口设计</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>
Reference in New Issue Copy Permalink