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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/rtc/rtc-config-guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">RTC 配置</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">
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<p class="- topic/p p" data-ofbid="d133345e33__20250123155212">本节介绍 RTC 的参数配置。</p>
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<section class="- topic/section section" id="rtc_configuration__section_gm2_db5_mdc" data-ofbid="rtc_configuration__section_gm2_db5_mdc"><h2 class="- topic/title title sectiontitle">内核配置</h2>
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<div class="- topic/p p" data-ofbid="d133345e41__20250123155212">
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<ol class="- topic/ol ol" id="rtc_configuration__ol_vwc_f1s_sdc" data-ofbid="rtc_configuration__ol_vwc_f1s_sdc">
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<li class="- topic/li li" data-ofbid="d133345e45__20250123155212">
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<div class="- topic/div div">
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<div class="- topic/p p" data-ofbid="d133345e49__20250123155212">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="rtc_configuration__codeblock_wg1_3ml_sdc" data-ofbid="rtc_configuration__codeblock_wg1_3ml_sdc"><code>make kernel-menuconfig</code></pre></div>
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<p class="- topic/p p" data-ofbid="d133345e54__20250123155212">或使用简写命令</p>
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<div class="- topic/p p" data-ofbid="d133345e57__20250123155212">
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="rtc_configuration__codeblock_uss_hml_sdc" data-ofbid="rtc_configuration__codeblock_uss_hml_sdc"><code>make km</code></pre>
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</div>
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</li>
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<li class="- topic/li li" data-ofbid="d133345e65__20250123155212">
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<div class="- topic/p p" data-ofbid="d133345e67__20250123155212">在内核配置界面，按如下选择打开 RTC
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驱动：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="rtc_configuration__pre_jcx_zrs_c1c" data-ofbid="rtc_configuration__pre_jcx_zrs_c1c"><code>Linux
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Device Drivers
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[*] Real Time Clock
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[*] ArtInChip Soc RTC</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="rtc_configuration__section_j1r_y15_mdc" data-ofbid="rtc_configuration__section_j1r_y15_mdc"><h2 class="- topic/title title sectiontitle">配置 DTS 参数</h2>
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<div class="- topic/p p" data-ofbid="d133345e81__20250123155212">RTC 驱动支持从 DTS 中配置的自定义参数如下表所示：<div class="- topic/note note note note_note" id="rtc_configuration__note_cs1_lc5_mdc" data-ofbid="rtc_configuration__note_cs1_lc5_mdc"><span class="note__title">注：</span> <div class="note__body"><code class="+ topic/ph pr-d/codeph ph codeph">aic,alarm-io-output</code> 和 <code class="+ topic/ph pr-d/codeph ph codeph">aic,32k-io-output</code>
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共用一个 IO 输出，只能二选一。</div></div></div>
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<div class="table-container"><table class="- topic/table table frame-all" id="rtc_configuration__table_zjx_1ss_c1c" data-ofbid="rtc_configuration__table_zjx_1ss_c1c" data-cols="5"><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">RTC 自定义参数</span></caption><colgroup><col style="width:16.186252771618626%"/><col style="width:12.749445676274945%"/><col style="width:11.086474501108649%"/><col style="width:14.412416851441243%"/><col style="width:45.565410199556545%"/></colgroup><thead class="- topic/thead thead">
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<tr class="- topic/row">
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<th class="- topic/entry entry colsep-1 rowsep-1" id="rtc_configuration__table_zjx_1ss_c1c__entry__1">参数名称</th>
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<th class="- topic/entry entry colsep-1 rowsep-1" id="rtc_configuration__table_zjx_1ss_c1c__entry__2">适用版本</th>
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<th class="- topic/entry entry colsep-1 rowsep-1" id="rtc_configuration__table_zjx_1ss_c1c__entry__3">类型</th>
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<th class="- topic/entry entry colsep-1 rowsep-1" id="rtc_configuration__table_zjx_1ss_c1c__entry__4">取值范围</th>
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<th class="- topic/entry entry colsep-0 rowsep-1" id="rtc_configuration__table_zjx_1ss_c1c__entry__5">功能说明</th>
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</tr>
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</thead><tbody class="- topic/tbody tbody">
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<tr class="- topic/row">
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="rtc_configuration__table_zjx_1ss_c1c__entry__1">aic,alarm-io-output</td>
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="rtc_configuration__table_zjx_1ss_c1c__entry__2">V0.1/V1.0</td>
|
|||
|
|
<td class="- topic/entry entry colsep-1 rowsep-1" headers="rtc_configuration__table_zjx_1ss_c1c__entry__3">Boolean</td>
|
|||
|
|
<td class="- topic/entry entry colsep-1 rowsep-1" headers="rtc_configuration__table_zjx_1ss_c1c__entry__4">有 - 1，无 - 0</td>
|
|||
|
|
<td class="- topic/entry entry colsep-0 rowsep-1" headers="rtc_configuration__table_zjx_1ss_c1c__entry__5">是否使能 alarm 的 IO 输出功能</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr class="- topic/row">
|
|||
|
|
<td class="- topic/entry entry colsep-1 rowsep-1" headers="rtc_configuration__table_zjx_1ss_c1c__entry__1">aic,32k-io-output</td>
|
|||
|
|
<td class="- topic/entry entry colsep-1 rowsep-1" headers="rtc_configuration__table_zjx_1ss_c1c__entry__2">V1.0</td>
|
|||
|
|
<td class="- topic/entry entry colsep-1 rowsep-1" headers="rtc_configuration__table_zjx_1ss_c1c__entry__3">Boolean</td>
|
|||
|
|
<td class="- topic/entry entry colsep-1 rowsep-1" headers="rtc_configuration__table_zjx_1ss_c1c__entry__4">有 - 1，无 - 0</td>
|
|||
|
|
<td class="- topic/entry entry colsep-0 rowsep-1" headers="rtc_configuration__table_zjx_1ss_c1c__entry__5">是否使能 32K 时钟输出功能</td>
|
|||
|
|
</tr>
|
|||
|
|
<tr class="- topic/row">
|
|||
|
|
<td class="- topic/entry entry colsep-1 rowsep-1" headers="rtc_configuration__table_zjx_1ss_c1c__entry__1">clock-rate</td>
|
|||
|
|
<td class="- topic/entry entry colsep-1 rowsep-1" headers="rtc_configuration__table_zjx_1ss_c1c__entry__2">V1.0</td>
|
|||
|
|
<td class="- topic/entry entry colsep-1 rowsep-1" headers="rtc_configuration__table_zjx_1ss_c1c__entry__3">Integer</td>
|
|||
|
|
<td class="- topic/entry entry colsep-1 rowsep-1" headers="rtc_configuration__table_zjx_1ss_c1c__entry__4">3276800±3196</td>
|
|||
|
|
<td class="- topic/entry entry colsep-0 rowsep-1" headers="rtc_configuration__table_zjx_1ss_c1c__entry__5">时钟源的实测频率值*100，用于时钟校准。<p class="- topic/p p" data-ofbid="d133345e184__20250123155212">这种取值方式可提高校准的精度，使得校准可以精确到 0.03
|
|||
|
|
Hz。</p></td>
|
|||
|
|
</tr>
|
|||
|
|
<tr class="- topic/row">
|
|||
|
|
<td class="- topic/entry entry colsep-1 rowsep-0" headers="rtc_configuration__table_zjx_1ss_c1c__entry__1">aic,clock-driver</td>
|
|||
|
|
<td class="- topic/entry entry colsep-1 rowsep-0" headers="rtc_configuration__table_zjx_1ss_c1c__entry__2">V1.0</td>
|
|||
|
|
<td class="- topic/entry entry colsep-1 rowsep-0" headers="rtc_configuration__table_zjx_1ss_c1c__entry__3">Integer</td>
|
|||
|
|
<td class="- topic/entry entry colsep-1 rowsep-0" headers="rtc_configuration__table_zjx_1ss_c1c__entry__4">[0, 15]</td>
|
|||
|
|
<td class="- topic/entry entry colsep-0 rowsep-0" headers="rtc_configuration__table_zjx_1ss_c1c__entry__5">Clock 驱动能力，数值越小越省功耗<p class="- topic/p p" data-ofbid="d133345e204__20250123155212">需要通过一个 Sysfs 节点 <a xml:lang="zh-CN" lang="zh-CN" class="- topic/xref xref" href="rtc-debug-guide.html#rtc_debug_guide__li_sysfs_drivecap_scan">驱动能力扫描</a>
|
|||
|
|
来获得取值。</p></td>
|
|||
|
|
</tr>
|
|||
|
|
</tbody></table></div>
|
|||
|
|
<div class="- topic/p p" data-ofbid="d133345e215__20250123155212"><strong class="+ topic/ph hi-d/b ph b">D211 配置</strong><ul class="- topic/ul ul" id="rtc_configuration__ul_ylh_bb5_mdc" data-ofbid="rtc_configuration__ul_ylh_bb5_mdc">
|
|||
|
|
<li class="- topic/li li" data-ofbid="d133345e220__20250123155212">
|
|||
|
|
<div class="- topic/p p" data-ofbid="d133345e222__20250123155212"><span class="+ topic/ph sw-d/filepath ph filepath">common/d211.dtsi</span>
|
|||
|
|
中的参数配置：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="rtc_configuration__codeblock_tgp_2ss_c1c" data-ofbid="rtc_configuration__codeblock_tgp_2ss_c1c"><code>rtc: rtc@<span class="hl-number">19030000</span> {
|
|||
|
|
compatible = <span class="hl-string">"artinchip,aic-rtc-v1.0"</span>;
|
|||
|
|
reg = <<span class="hl-number">0x0</span> <span class="hl-number">0x19030000</span> <span class="hl-number">0x0</span> <span class="hl-number">0x1000</span>>;
|
|||
|
|
interrupts-extended = <&plic0 <span class="hl-number">50</span> IRQ_TYPE_LEVEL_HIGH>;
|
|||
|
|
clocks = <&cmu CLK_RTC>;
|
|||
|
|
resets = <&rst RESET_RTC>;
|
|||
|
|
};</code></pre></div>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d133345e230__20250123155212">
|
|||
|
|
<div class="- topic/p p" data-ofbid="d133345e232__20250123155212"><span class="+ topic/ph sw-d/filepath ph filepath">xxx/board.dts</span>
|
|||
|
|
中的参数配置：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="rtc_configuration__codeblock_amt_2ss_c1c" data-ofbid="rtc_configuration__codeblock_amt_2ss_c1c"><code>&rtc {
|
|||
|
|
aic,alarm-io-output;
|
|||
|
|
clock-rate = <<span class="hl-number">3276851</span>>;
|
|||
|
|
aic,clock-driver = <<span class="hl-number">13</span>>;
|
|||
|
|
status = <span class="hl-string">"okay"</span>;
|
|||
|
|
};</code></pre></div>
|
|||
|
|
</li>
|
|||
|
|
</ul></div>
|
|||
|
|
</section>
|
|||
|
|
<section class="- topic/section section" id="rtc_configuration__section_t1l_v15_mdc" data-ofbid="rtc_configuration__section_t1l_v15_mdc"><h2 class="- topic/title title sectiontitle">配置时区</h2>
|
|||
|
|
|
|||
|
|
<div class="- topic/p p" data-ofbid="d133345e247__20250123155212">Luban SDK 提供了时区管理功能，默认配置时区为 <code class="+ topic/ph pr-d/codeph ph codeph">Asia/Shanghai</code>，即中国的 +8 时区。
|
|||
|
|
按照下列流程，可以配置和管理时钟：<ol class="- topic/ol ol" id="rtc_configuration__ul_nbz_jb5_mdc" data-ofbid="rtc_configuration__ul_nbz_jb5_mdc">
|
|||
|
|
<li class="- topic/li li" data-ofbid="d133345e254__20250123155212">在 Luban 根目录下执行 <span class="+ topic/keyword sw-d/cmdname keyword cmdname">make
|
|||
|
|
menuconfig</span>，进入功能配置界面，选择时区配置：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="rtc_configuration__pre_ahy_hss_c1c" data-ofbid="rtc_configuration__pre_ahy_hss_c1c"><code>System configuration
|
|||
|
|
(Asia/Shanghai) <strong class="hl-keyword">default</strong> local time</code></pre></li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d133345e262__20250123155212">
|
|||
|
|
<div class="- topic/p p" data-ofbid="d133345e264__20250123155212">执行下列 Shell
|
|||
|
|
命令，查看系统中是否有时区配置。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="rtc_configuration__codeblock_e1w_4b5_mdc" data-ofbid="rtc_configuration__codeblock_e1w_4b5_mdc"><code>date</code></pre><ul class="- topic/ul ul" id="rtc_configuration__ul_cpj_nb5_mdc" data-ofbid="rtc_configuration__ul_cpj_nb5_mdc">
|
|||
|
|
<li class="- topic/li li" data-ofbid="d133345e270__20250123155212">如果系统输出中包含 “UTC”
|
|||
|
|
字样，表示未配置时区，示例如下：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="rtc_configuration__codeblock_y3l_j1s_sdc" data-ofbid="rtc_configuration__codeblock_y3l_j1s_sdc"><code>Tue Jan <span class="hl-number">601</span>:<span class="hl-number">41</span>:<span class="hl-number">27</span> UTC <span class="hl-number">1970</span></code></pre><p class="- topic/p p" data-ofbid="d133345e274__20250123155212">此时，RTC
|
|||
|
|
时间和系统时间（<span class="+ topic/keyword sw-d/cmdname keyword cmdname">date</span> 命令的输出）一致。</p></li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d133345e280__20250123155212">如果系统输出中包含 “CST” 字样，表示已经配置了 +8
|
|||
|
|
时区：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="rtc_configuration__codeblock_e4z_j1s_sdc" data-ofbid="rtc_configuration__codeblock_e4z_j1s_sdc"><code>Tue Jan <span class="hl-number">601</span>:<span class="hl-number">41</span>:<span class="hl-number">27</span> CST <span class="hl-number">1970</span></code></pre><div class="- topic/p p" data-ofbid="d133345e284__20250123155212">此时
|
|||
|
|
RTC
|
|||
|
|
时间和系统时间会出现一个时区差：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="rtc_configuration__pre_chy_hss_c1c" data-ofbid="rtc_configuration__pre_chy_hss_c1c"><code>系统时间 = RTC 时间 + 时区</code></pre></div><div class="- topic/p p" data-ofbid="d133345e288__20250123155212">以
|
|||
|
|
+8 时区为例，通过 <a xml:lang="zh-CN" lang="zh-CN" class="- topic/xref xref" href="rtc-debug-guide.html#rtc_debug_guide__section_cnr_4c5_mdc">hwclock 命令</a>
|
|||
|
|
可以查看时区差：<ul class="- topic/ul ul" id="rtc_configuration__ul_qbc_1bs_sdc" data-ofbid="rtc_configuration__ul_qbc_1bs_sdc">
|
|||
|
|
<li class="- topic/li li" data-ofbid="d133345e296__20250123155212">系统时间：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="rtc_configuration__pre_dhy_hss_c1c" data-ofbid="rtc_configuration__pre_dhy_hss_c1c"><code>date</code></pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="rtc_configuration__codeblock_tr1_x1s_sdc" data-ofbid="rtc_configuration__codeblock_tr1_x1s_sdc"><code>Tue Jan <span class="hl-number">601</span>:<span class="hl-number">49</span>:<span class="hl-number">53</span> CST <span class="hl-number">1970</span></code></pre></li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d133345e303__20250123155212">
|
|||
|
|
<div class="- topic/p p" data-ofbid="d133345e305__20250123155212">原始 RTC
|
|||
|
|
时间<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="rtc_configuration__codeblock_xxh_cbs_sdc" data-ofbid="rtc_configuration__codeblock_xxh_cbs_sdc"><code>hwclock </code></pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="rtc_configuration__codeblock_pqb_bbs_sdc" data-ofbid="rtc_configuration__codeblock_pqb_bbs_sdc"><code>Mon Jan <span class="hl-number">517</span>:<span class="hl-number">49</span>:<span class="hl-number">17</span> <span class="hl-number">19700.000000</span> seconds</code></pre></div>
|
|||
|
|
</li>
|
|||
|
|
<li class="- topic/li li" data-ofbid="d133345e313__20250123155212">RTC 时间 +
|
|||
|
|
时区，和系统时间一致<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="rtc_configuration__codeblock_whk_dbs_sdc" data-ofbid="rtc_configuration__codeblock_whk_dbs_sdc"><code>hwclock -u</code></pre><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="rtc_configuration__codeblock_mwn_fbs_sdc" data-ofbid="rtc_configuration__codeblock_mwn_fbs_sdc"><code>Tue Jan <span class="hl-number">601</span>:<span class="hl-number">49</span>:<span class="hl-number">20</span> <span class="hl-number">19700.000000</span> seconds</code></pre><p class="- topic/p p" data-ofbid="d133345e319__20250123155212">在打开时区的情况下，使用
|
|||
|
|
<span class="+ topic/keyword sw-d/cmdname keyword cmdname">hwclock -wu</span> 命令可以从系统时间同步到 RTC
|
|||
|
|
时间的设置。</p><p class="- topic/p p" data-ofbid="d133345e324__20250123155212">查看 RTC 时间的方式也应该加参数
|
|||
|
|
<code class="+ topic/ph pr-d/codeph ph codeph">-u</code>，指示 hwclock 工具 RTC 中保存的是 UTC
|
|||
|
|
时间。</p></li>
|
|||
|
|
</ul></div></li>
|
|||
|
|
</ul></div>
|
|||
|
|
</li>
|
|||
|
|
</ol></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="#rtc_configuration__section_gm2_db5_mdc" data-tocid="rtc_configuration__section_gm2_db5_mdc">内核配置</a></div></li><li class="section-item"><div class="section-title"><a href="#rtc_configuration__section_j1r_y15_mdc" data-tocid="rtc_configuration__section_j1r_y15_mdc">配置 DTS 参数</a></div></li><li class="section-item"><div class="section-title"><a href="#rtc_configuration__section_t1l_v15_mdc" data-tocid="rtc_configuration__section_t1l_v15_mdc">配置时区</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;
|
|||
|
|
}
|
|||
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|
|
|||
|
|
--></style>
|
|||
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|
|||
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|
|||
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|||
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|
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|||
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|
|||
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|
|||
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|
|||
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|
|
|||
|
|
<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: 2025-01-23
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</div>
|
|||
|
|
</footer>
|
|||
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|
|||
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|
<button id="go2top" class="d-print-none" title="返回顶部">
|
|||
|
|
<span class="oxy-icon oxy-icon-up"></span>
|
|||
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</button>
|
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<div id="modal_img_large" class="modal">
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<span class="close oxy-icon oxy-icon-remove"></span>
|
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<div id="modal_img_container"></div>
|
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<div id="caption"></div>
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</div>
|
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|
|||
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|
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<script src="${pd}/publishing/publishing-styles-AIC-template/js/custom.js" defer="defer"></script>
|
|||
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|
|||
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|
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</body>
|
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</html>
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