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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" 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/advanced/pinmux.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">引脚配置</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 2 minute(s)
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</div><div class="- topic/body body"><p class="- topic/p p" data-ofbid="d228597e24__20250121171649">在 <span class="- topic/ph ph">Luban-Lite</span> SDK 中，修改同一个 <span class="+ topic/ph sw-d/filepath ph filepath">pinmux.c</span> 文件，可以配置相同板卡的 GPIO
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引脚功能。</p><p class="- topic/p p" data-ofbid="d228597e32__20250121171649">例如，对于以下 D133CBS RISC-V Kunlun Pi
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开发板，可以使用<span class="+ topic/ph sw-d/filepath ph filepath">target/d13x/kunlunpi88-nor/pinmux.c</span> 文件来配置 GPIO 引脚功能。</p><div class="- topic/note note note note_note" id="id__note_irv_qn3_ddc" data-ofbid="id__note_irv_qn3_ddc"><span class="note__title">注：</span> 每一个需要使用到的引脚都应显式地设置为指定功能，包括通用
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GPIO、I2C、UART、SPI 等功能。</div><section class="- topic/section section" id="id__pinmux-c" data-ofbid="id__pinmux-c"><h2 class="- topic/title title sectiontitle">配置 <span class="+ topic/ph sw-d/filepath ph filepath">pinmux.c</span>文件</h2>
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<p class="- topic/p p" data-ofbid="d228597e51__20250121171649">在 <span class="+ topic/ph sw-d/filepath ph filepath">pinmux.c</span>中，根据需要修改结构体数组来配置每个引脚的功能。 <span class="+ topic/ph sw-d/filepath ph filepath">pinmux.c</span> 文件路径：
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<span class="+ topic/ph sw-d/filepath ph filepath">target/<CPU>/<board>/pinmux.c</span>。</p>
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<div class="- topic/note note note note_note" id="id__note_jrv_qn3_ddc" data-ofbid="id__note_jrv_qn3_ddc"><span class="note__title">注：</span> 项目中的 BootLoader 和 RT-Thread 共享 pinmux 配置， 因此在修改 pinmux.c
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之后，必须先编译
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BootLoader， 再编译 RT-Thread，否则 pinmux 配置可能无法生效。<p class="- topic/p p" data-ofbid="d228597e69__20250121171649">自 V1.0.4 之后，<span class="- topic/ph ph">Luban-Lite</span> 支持使用 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">mb</span> 命令，一键编译 BootLoader 和
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RT-Thread。</p></div>
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<div class="- topic/p p" data-ofbid="d228597e78__20250121171649">在 <span class="+ topic/ph sw-d/filepath ph filepath">pinmux.c</span>中，通过结构体数组，对所有 pin
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脚的功能进行管理，并在系统启动时统一做配置。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_p1l_4jq_gdc" data-ofbid="id__codeblock_p1l_4jq_gdc"><strong class="hl-keyword">struct</strong> aic_pinmux aic_pinmux_config[] = {
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||
...
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||
};</pre></div>
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<div class="- topic/div div section" id="id__id3">
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<div class="- topic/p p" data-ofbid="d228597e88__20250121171649">每个 pin 脚的配置，使用结构体描述。例如，PA.0 和 PA.1
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引脚的配置如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_ard_rjq_gdc" data-ofbid="id__codeblock_ard_rjq_gdc"><strong class="hl-keyword">struct</strong> aic_pinmux
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{
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<strong class="hl-keyword">unsigned</strong> <strong class="hl-keyword">char</strong> func; <em class="hl-comment">// 功能编号</em>
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<strong class="hl-keyword">unsigned</strong> <strong class="hl-keyword">char</strong> bias; <em class="hl-comment">// 内部上下拉设置，一般无需修改</em>
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<strong class="hl-keyword">unsigned</strong> <strong class="hl-keyword">char</strong> drive; <em class="hl-comment">// 驱动能力，若需要修改，请联系专业人士确认</em>
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<strong class="hl-keyword">char</strong> * name; <em class="hl-comment">// 引脚名称字符串，例如 "PA.0"</em>
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};</pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_cj4_sjq_gdc" data-ofbid="id__codeblock_cj4_sjq_gdc"><strong class="hl-keyword">struct</strong> aic_pinmux aic_pinmux_config[] = {
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#ifdef AIC_USING_UART0
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<em class="hl-comment">/* uart0 */</em>
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{<span class="hl-number">5</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PA.0"</span>}, <em class="hl-comment">// PA.0 配置功能 5，用作串口 0</em>
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{<span class="hl-number">5</span>, PIN_PULL_DIS, <span class="hl-number">3</span>, <span class="hl-string">"PA.1"</span>}, <em class="hl-comment">// PA.1 配置功能 5，用作串口 0</em>
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#endif
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...
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};</pre></div>
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||
<p class="- topic/p p" data-ofbid="d228597e95__20250121171649">PA.0 和 PA.1 引脚功能均设置为 5，用作串口 0。注意，同一个引脚只能配置一个功能。</p>
|
||
<div class="- topic/note note note note_note" id="id__note_krv_qn3_ddc" data-ofbid="id__note_krv_qn3_ddc"><span class="note__title">注：</span> 若要配置某 pin 脚用于通用 GPIO 功能，则需将功能配置为
|
||
1。关于引脚功能的详细描述，可参考用户手册中的引脚复用功能表。</div>
|
||
</div>
|
||
</section><section class="- topic/section section" id="id__id4" data-ofbid="id__id4"><h2 class="- topic/title title sectiontitle">使用检查工具 <code class="+ topic/ph pr-d/codeph ph codeph">pinmux_check</code></h2>
|
||
<p class="- topic/p p" data-ofbid="d228597e108__20250121171649">为检查引脚功能配置，<span class="- topic/ph ph">Luban-Lite</span> 提供 <code class="+ topic/ph pr-d/codeph ph codeph">pinmux_check</code> 工具。具体使用流程如下所示：</p>
|
||
<ol class="- topic/ol ol" id="id__ol_um2_bqc_5cc" data-ofbid="id__ol_um2_bqc_5cc"><li class="- topic/li li" data-ofbid="d228597e118__20250121171649">在 RT-Thread 配置中，选择启用 pinmux_check
|
||
工具，执行编译和烧录：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_pxw_vjq_gdc" data-ofbid="id__codeblock_pxw_vjq_gdc">Local packages options --->
|
||
ArtInChip packages options --->
|
||
[*] aic-pinmux-check --->
|
||
[*] Enable pinmux check tools</pre></li><li class="- topic/li li" data-ofbid="d228597e122__20250121171649">
|
||
<div class="- topic/p p" data-ofbid="d228597e124__20250121171649">系统启动之后，输入 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">pinmux_check-h</span>
|
||
命令，查看帮助菜单。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_tdh_wjq_gdc" data-ofbid="id__codeblock_tdh_wjq_gdc">pinmux_check -h</pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_uqk_kjj_5dc" data-ofbid="id__codeblock_uqk_kjj_5dc">Compile time: Apr <span class="hl-number">23</span> <span class="hl-number">2024</span> <span class="hl-number">15</span>:<span class="hl-number">39</span>:<span class="hl-number">22</span>
|
||
Usage: pinmux_check [options]
|
||
-s, --start print PIN start from PXn . Default as start from PA0
|
||
-c, --count print PIN count.
|
||
-h, --help
|
||
|
||
Example：
|
||
pinmux_check -s PA0 -c <span class="hl-number">2</span></pre></div>
|
||
</li><li class="- topic/li li" data-ofbid="d228597e134__20250121171649">
|
||
<div class="- topic/p p" data-ofbid="d228597e136__20250121171649">查看 PA0、PA1
|
||
的引脚配置。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_qxp_wjq_gdc" data-ofbid="id__codeblock_qxp_wjq_gdc">pinmux_check -s PA0 -c <span class="hl-number">2</span></pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_mbr_kjj_5dc" data-ofbid="id__codeblock_mbr_kjj_5dc">PA0: <span class="hl-number">0x00000035</span>, fun[<span class="hl-number">5</span>], drv[<span class="hl-number">3</span>], pull[<span class="hl-number">0</span>], IE[<span class="hl-number">0</span>], OE[<span class="hl-number">0</span>], IE_FORCE[<span class="hl-number">0</span>] # fun[<span class="hl-number">5</span>] 表示 PA0 配置为功能 <span class="hl-number">5</span>，drv[<span class="hl-number">3</span>]表示驱动能力为 <span class="hl-number">3</span>；
|
||
PA1: <span class="hl-number">0x00000035</span>, fun[<span class="hl-number">5</span>], drv[<span class="hl-number">3</span>], pull[<span class="hl-number">0</span>], IE[<span class="hl-number">0</span>], OE[<span class="hl-number">0</span>], IE_FORCE[<span class="hl-number">0</span>] # fun[<span class="hl-number">5</span>] 表示 PA1 配置为功能 <span class="hl-number">5</span>，drv[<span class="hl-number">3</span>]表示驱动能力为 <span class="hl-number">3</span>；</pre></div>
|
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</li></ol>
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<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="#id__pinmux-c" data-tocid="id__pinmux-c">配置 <span class="+ topic/ph sw-d/filepath ph filepath">pinmux.c</span>文件</a></div></li><li class="section-item"><div class="section-title"><a href="#id__id4" data-tocid="id__id4">使用检查工具 <code class="+ topic/ph pr-d/codeph ph codeph">pinmux_check</code></a></div></li></ul></div>
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