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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="false"><div data-tocid="id-d4445e2153" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d4445e2153-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/chapter-advanced-app.html" id="id-d4445e2153-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></li></ul></div>
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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1">
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<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" title="Edit this document" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/keyadc/device-keyboards-user-guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">按键矩阵</h1>
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<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>
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<div class="- topic/body concept/conbody body conbody"><p class="- topic/shortdesc shortdesc">此章节介绍按键矩阵的使用方法以及相关配置。</p>
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<p class="- topic/p p" data-ofbid="d97826e39__20250123155207"><span class="- topic/ph ph">Luban</span> 可以实现按键矩阵，具体配置步骤如下</p>
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<div class="- topic/bodydiv concept/conbodydiv bodydiv conbodydiv">
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<section class="- topic/section section" id="concept_s4m_zk3_pzb__section_vmz_1w3_bzb" data-ofbid="concept_s4m_zk3_pzb__section_vmz_1w3_bzb"><h2 class="- topic/title title sectiontitle">内核配置</h2>
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<div class="- topic/p p" data-ofbid="d97826e51__20250123155207">
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||
<ol class="- topic/ol ol" id="concept_s4m_zk3_pzb__ol_hvg_vzq_sdc" data-ofbid="concept_s4m_zk3_pzb__ol_hvg_vzq_sdc">
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<li class="- topic/li li" data-ofbid="d97826e55__20250123155207">
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<div class="- topic/div div">
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<div class="- topic/p p" data-ofbid="d97826e59__20250123155207">在 SDK 根目录下，执行下列命令，进入 kernel
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的功能配置界面：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_s4m_zk3_pzb__codeblock_wg1_3ml_sdc" data-ofbid="concept_s4m_zk3_pzb__codeblock_wg1_3ml_sdc"><code>make kernel-menuconfig</code></pre></div>
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<p class="- topic/p p" data-ofbid="d97826e64__20250123155207">或使用简写命令</p>
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<div class="- topic/p p" data-ofbid="d97826e67__20250123155207">
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_s4m_zk3_pzb__codeblock_uss_hml_sdc" data-ofbid="concept_s4m_zk3_pzb__codeblock_uss_hml_sdc"><code>make km</code></pre>
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</div>
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</div>
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</li>
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<li class="- topic/li li" data-ofbid="d97826e75__20250123155207">
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<div class="- topic/p p" data-ofbid="d97826e77__20250123155207">在内核配置界面，按如下选择：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_s4m_zk3_pzb__codeblock_iqj_rxh_p1c" data-ofbid="concept_s4m_zk3_pzb__codeblock_iqj_rxh_p1c"><code>Linux
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Device Drivers
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[*] Input device Support
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<*> Event interface
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[*] Keyboards
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<*> ADC Ladder Buttons
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</code></pre></div>
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</li>
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</ol>
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</div>
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</section>
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<section class="- topic/section section" id="concept_s4m_zk3_pzb__section_xmz_1w3_bzb" data-ofbid="concept_s4m_zk3_pzb__section_xmz_1w3_bzb"><h2 class="- topic/title title sectiontitle">软件配置</h2>
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||
|
||
<ol class="- topic/ol ol" id="concept_s4m_zk3_pzb__ol_zj2_zzq_sdc" data-ofbid="concept_s4m_zk3_pzb__ol_zj2_zzq_sdc">
|
||
<li class="- topic/li li" data-ofbid="d97826e93__20250123155207">
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<div class="- topic/p p" data-ofbid="d97826e95__20250123155207">在 SDK 根目录下，执行下列命令，进入 menuconfig
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功能配置界面：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_s4m_zk3_pzb__codeblock_fj4_yzq_sdc" data-ofbid="concept_s4m_zk3_pzb__codeblock_fj4_yzq_sdc"><code>make menuconfig</code></pre></div>
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</li>
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||
<li class="- topic/li li" data-ofbid="d97826e101__20250123155207">
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<div class="- topic/p p" data-ofbid="d97826e103__20250123155207">按如下选择，打开
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||
<span class="+ topic/ph ui-d/uicontrol ph uicontrol">test-keyadc</span>：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_s4m_zk3_pzb__codeblock_e11_sxh_p1c" data-ofbid="concept_s4m_zk3_pzb__codeblock_e11_sxh_p1c"><code>Artinchip packages
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||
Sample code
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||
[*] test-keyadc</code></pre></div>
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||
</li>
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||
</ol>
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||
</section>
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<section class="- topic/section section" id="concept_s4m_zk3_pzb__section_zmz_1w3_bzb" data-ofbid="concept_s4m_zk3_pzb__section_zmz_1w3_bzb"><h2 class="- topic/title title sectiontitle">DTS 参数配置</h2>
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<p class="- topic/p p" data-ofbid="d97826e119__20250123155207">DTS 参数主要存放在 <span class="+ topic/ph sw-d/filepath ph filepath">target/d211/方案 x/board.dts</span>
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文件中，功能参数的设置必须和硬件原理图相匹配。</p>
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<div class="- topic/p p" data-ofbid="d97826e125__20250123155207">设置数据通路如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_s4m_zk3_pzb__codeblock_w1z_msf_d1c" data-ofbid="concept_s4m_zk3_pzb__codeblock_w1z_msf_d1c"><code>key_button: adc-keys {
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compatible = <span class="hl-string">"adc-keys"</span>;
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io-channels = <&gpai <span class="hl-number">6</span>>;
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io-channel-names = <span class="hl-string">"buttons"</span>;
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poll-interval = <<span class="hl-number">200</span>>;
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keyup-threshold-microvolt = <<span class="hl-number">3000000</span>>;
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up-key {
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label = <span class="hl-string">"up_key"</span>;
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linux,code = <KEY_UP>;
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press-threshold-microvolt = <<span class="hl-number">300000</span>>;
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};
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down-key {
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label = <span class="hl-string">"down_key"</span>;
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linux,code = <KEY_DOWN>;
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press-threshold-microvolt = <<span class="hl-number">800000</span>>;
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};
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left-key {
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label = <span class="hl-string">"left_key"</span>;
|
||
linux,code = <KEY_LEFT>;
|
||
press-threshold-microvolt = <<span class="hl-number">1400000</span>>;
|
||
};
|
||
|
||
right-key {
|
||
label = <span class="hl-string">"right_key"</span>;
|
||
linux,code = <KEY_RIGHT>;
|
||
press-threshold-microvolt = <<span class="hl-number">2000000</span>>;
|
||
};
|
||
};</code></pre></div>
|
||
<p class="- topic/p p" data-ofbid="d97826e130__20250123155207">其中：</p>
|
||
<ul class="- topic/ul ul" id="concept_s4m_zk3_pzb__ul_cnz_1w3_bzb" data-ofbid="concept_s4m_zk3_pzb__ul_cnz_1w3_bzb">
|
||
<li class="- topic/li li" data-ofbid="d97826e135__20250123155207">
|
||
<p class="- topic/p p" data-ofbid="d97826e137__20250123155207"><span class="+ topic/keyword pr-d/parmname keyword parmname">io-channels</span>：所选择的 io 通道</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d97826e143__20250123155207">
|
||
<p class="- topic/p p" data-ofbid="d97826e145__20250123155207"><span class="+ topic/keyword pr-d/parmname keyword parmname">io-channels-names</span>：io 通道的别名</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d97826e151__20250123155207">
|
||
<p class="- topic/p p" data-ofbid="d97826e153__20250123155207"><span class="+ topic/keyword pr-d/parmname keyword parmname">poll-interval</span>：表示获取 ADC 值的轮询间隔(单位毫秒)</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d97826e159__20250123155207">
|
||
<p class="- topic/p p" data-ofbid="d97826e161__20250123155207"><span class="+ topic/keyword pr-d/parmname keyword parmname">keyup-threshold-microvolt</span>：按键抬起时，对应 io
|
||
通道的电压(单位微伏)，可设置为标准电压</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d97826e167__20250123155207">
|
||
<p class="- topic/p p" data-ofbid="d97826e169__20250123155207"><span class="+ topic/keyword pr-d/parmname keyword parmname">label</span>：键值的说明</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d97826e176__20250123155207">
|
||
<p class="- topic/p p" data-ofbid="d97826e178__20250123155207"><span class="+ topic/keyword pr-d/parmname keyword parmname">linux,code</span>：按键上报的键值</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d97826e184__20250123155207">
|
||
<p class="- topic/p p" data-ofbid="d97826e186__20250123155207"><span class="+ topic/keyword pr-d/parmname keyword parmname">press-threshold-microvolt</span>：按键按下时，对应 io
|
||
通道的电压(单位微伏)</p>
|
||
<p class="- topic/p p" data-ofbid="d97826e191__20250123155207">threshold-microvolt 范围判断逻辑如下：</p>
|
||
<p class="- topic/p p" data-ofbid="d97826e194__20250123155207">为了简洁表格，up-key 的 microvolt 配置简写为 mv，同理得
|
||
mv、left_mv、right_mv。keyup-threshold-microvolt 简写为 mv。</p>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="concept_s4m_zk3_pzb__table_dnz_1w3_bzb" data-ofbid="concept_s4m_zk3_pzb__table_dnz_1w3_bzb" data-cols="2"><caption></caption><colgroup><col style="width:62.121212121212125%"/><col style="width:37.87878787878788%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-0 rowsep-0" id="concept_s4m_zk3_pzb__table_dnz_1w3_bzb__entry__1">参数定义范围</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-0" id="concept_s4m_zk3_pzb__table_dnz_1w3_bzb__entry__2">含义</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_s4m_zk3_pzb__table_dnz_1w3_bzb__entry__1">(right_mv + keyup_mv)/2 <= value</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_s4m_zk3_pzb__table_dnz_1w3_bzb__entry__2">no key pressed</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_s4m_zk3_pzb__table_dnz_1w3_bzb__entry__1">(left_mv + right_mv)/2 <= value < (right_mv +
|
||
keyup_mv)/2</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_s4m_zk3_pzb__table_dnz_1w3_bzb__entry__2">KEY_RIGHT pressed</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_s4m_zk3_pzb__table_dnz_1w3_bzb__entry__1">(down_mv + left_mv)/2 <= value < (left_mv +
|
||
right_mv)/2</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_s4m_zk3_pzb__table_dnz_1w3_bzb__entry__2">KEY_LEFT pressed</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_s4m_zk3_pzb__table_dnz_1w3_bzb__entry__1">(up_mv + down_mv)/2 <= value < (down_mv +
|
||
right_mv)/2</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_s4m_zk3_pzb__table_dnz_1w3_bzb__entry__2">KEY_DOWN pressed</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_s4m_zk3_pzb__table_dnz_1w3_bzb__entry__1">value < (up_mv + down_mv)/2</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="concept_s4m_zk3_pzb__table_dnz_1w3_bzb__entry__2">KEY_UP pressed</td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<div class="- topic/note note note note_note" id="concept_s4m_zk3_pzb__note_yp2_4sf_d1c" data-ofbid="concept_s4m_zk3_pzb__note_yp2_4sf_d1c"><span class="note__title">注：</span> <div class="note__body">
|
||
<p class="- topic/p p" data-ofbid="d97826e269__20250123155207">所有 microvolt 值需均小于 microvolt，并且 microvolt 间需均不相同。</p>
|
||
</div></div>
|
||
</li>
|
||
</ul>
|
||
</section>
|
||
<section class="- topic/section section" id="concept_s4m_zk3_pzb__section_enz_1w3_bzb" data-ofbid="concept_s4m_zk3_pzb__section_enz_1w3_bzb"><h2 class="- topic/title title sectiontitle">测试指南</h2>
|
||
|
||
<ol class="- topic/ol ol" id="concept_s4m_zk3_pzb__ol_urp_31r_sdc" data-ofbid="concept_s4m_zk3_pzb__ol_urp_31r_sdc">
|
||
<li class="- topic/li li" data-ofbid="d97826e283__20250123155207">
|
||
<div class="- topic/p p" data-ofbid="d97826e285__20250123155207">在 Shell 中运行 <code class="+ topic/ph pr-d/codeph ph codeph">keyadc_test</code>
|
||
命令：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_s4m_zk3_pzb__codeblock_ur5_sxh_p1c" data-ofbid="concept_s4m_zk3_pzb__codeblock_ur5_sxh_p1c"><code>keyadc_test -h</code></pre></div>
|
||
<div class="- topic/p p" data-ofbid="d97826e293__20250123155207">输出结果示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_s4m_zk3_pzb__codeblock_ugc_g1r_sdc" data-ofbid="concept_s4m_zk3_pzb__codeblock_ugc_g1r_sdc"><code>Usage: keyadc_test [options]:
|
||
-d, --device The name of event device
|
||
-h, --usage
|
||
|
||
Example: keyadc_test -d event0
|
||
</code></pre></div>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d97826e299__20250123155207">
|
||
<div class="- topic/p p" data-ofbid="d97826e301__20250123155207">以 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">-d</span> 为例，<span class="+ topic/keyword sw-d/cmdname keyword cmdname">keyadc_test</span>
|
||
使用示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_s4m_zk3_pzb__codeblock_vgy_sxh_p1c" data-ofbid="concept_s4m_zk3_pzb__codeblock_vgy_sxh_p1c"><code>keyadc_test -d event0</code></pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="concept_s4m_zk3_pzb__codeblock_tt1_k1r_sdc" data-ofbid="concept_s4m_zk3_pzb__codeblock_tt1_k1r_sdc"><code>key up pressed
|
||
key left pressed
|
||
key right pressed
|
||
key down pressed
|
||
</code></pre></div>
|
||
</li>
|
||
</ol>
|
||
</section>
|
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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="#concept_s4m_zk3_pzb__section_vmz_1w3_bzb" data-tocid="concept_s4m_zk3_pzb__section_vmz_1w3_bzb">内核配置</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_s4m_zk3_pzb__section_xmz_1w3_bzb" data-tocid="concept_s4m_zk3_pzb__section_xmz_1w3_bzb">软件配置</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_s4m_zk3_pzb__section_zmz_1w3_bzb" data-tocid="concept_s4m_zk3_pzb__section_zmz_1w3_bzb">DTS 参数配置</a></div></li><li class="section-item"><div class="section-title"><a href="#concept_s4m_zk3_pzb__section_enz_1w3_bzb" data-tocid="concept_s4m_zk3_pzb__section_enz_1w3_bzb">测试指南</a></div></li></ul></div>
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