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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"><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/tsensor/tsensor-key-procedures.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;"></div><div class="- topic/body concept/conbody body conbody"><section class="- topic/section section" id="tsensor_key_procedures__section_u3t_ngg_f1c" data-ofbid="tsensor_key_procedures__section_u3t_ngg_f1c"><h2 class="- topic/title title sectiontitle">初始化流程</h2>
<p class="- topic/p p" data-ofbid="d239398e29__20250121171657">TSensor 驱动的初始化接口通过 <code class="+ topic/ph pr-d/codeph ph codeph">INIT_DEVICE_EXPORT(drv_tsen_init)</code> 完成，会通过调用 Sensor
子系统的接口 rt_hw_sensor_register() 注册一个 Sensor 设备。</p>
<p class="- topic/p p" data-ofbid="d239398e35__20250121171657">TSensor 控制器的初始化过程，主要步骤有：</p>
<ol class="- topic/ol ol" id="tsensor_key_procedures__ol_o1g_4gg_f1c" data-ofbid="tsensor_key_procedures__ol_o1g_4gg_f1c"><li class="- topic/li li" data-ofbid="d239398e39__20250121171657">
<p class="- topic/p p" data-ofbid="d239398e41__20250121171657">初始化模块的 clk。</p>
</li><li class="- topic/li li" data-ofbid="d239398e44__20250121171657">
<p class="- topic/p p" data-ofbid="d239398e46__20250121171657">注册中断。</p>
</li><li class="- topic/li li" data-ofbid="d239398e49__20250121171657">
<p class="- topic/p p" data-ofbid="d239398e51__20250121171657">初始化默认参数。</p>
</li><li class="- topic/li li" data-ofbid="d239398e54__20250121171657">
<p class="- topic/p p" data-ofbid="d239398e56__20250121171657">向设备框架中注册 Sensor 设备。</p>
</li></ol>
</section><section class="- topic/section section" id="tsensor_key_procedures__section_x4q_dct_c1c" data-ofbid="tsensor_key_procedures__section_x4q_dct_c1c"><h2 class="- topic/title title sectiontitle">中断处理流程</h2>
<p class="- topic/p p" data-ofbid="d239398e65__20250121171657">TSensor 支持使用中断方式来读取数据，避免应用层的忙等待。</p>
<figure class="- topic/fig fig fignone" id="tsensor_key_procedures__fig_fmc_fct_c1c" data-ofbid="tsensor_key_procedures__fig_fmc_fct_c1c"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="tsensor_key_procedures__image_atm_pgg_f1c" src="../../../images/ths/tsen_irq_flow.png" width="288" alt="tsen_irq_flow"/></div><br/><figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 1</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">TSensor 非周期模式的数据采集流程</span></figcaption></figure>
<ul class="- topic/ul ul simple" id="tsensor_key_procedures__ul_wfk_ywh_bdc" data-ofbid="tsensor_key_procedures__ul_wfk_ywh_bdc"><li class="- topic/li li" data-ofbid="d239398e76__20250121171657">
<p class="- topic/p p" data-ofbid="d239398e78__20250121171657">对于非周期模式的数据采集流程：</p>
<ol class="- topic/ol ol" id="tsensor_key_procedures__ul_jsc_lsg_ddc" data-ofbid="tsensor_key_procedures__ul_jsc_lsg_ddc"><li class="- topic/li li" data-ofbid="d239398e82__20250121171657">用户层触发
ops→fetch_data() 接口，就会启动一次硬件去读数据。</li><li class="- topic/li li" data-ofbid="d239398e88__20250121171657">当硬件准备好数据，会产生一个中断，通知系统数据已经准备好可以读取。</li><li class="- topic/li li" data-ofbid="d239398e90__20250121171657">中断处理函数会响应该中断信号。在中断处理函数中，用 <span class="+ topic/keyword pr-d/parmname keyword parmname">INT Flag</span>
来区分是哪个通道有数据。</li><li class="- topic/li li" data-ofbid="d239398e95__20250121171657">中断处理函数会逐个通道扫描，将每个通道的数据读出，并将数据缓存到一个全局变量中，供后续的用户层应用访问和使用。</li></ol>
</li><li class="- topic/li li" data-ofbid="d239398e98__20250121171657">
<div class="- topic/p p" data-ofbid="d239398e100__20250121171657">对于周期模式： <ol class="- topic/ol ol" id="tsensor_key_procedures__ol_etn_zsg_ddc" data-ofbid="tsensor_key_procedures__ol_etn_zsg_ddc"><li class="- topic/li li" data-ofbid="d239398e103__20250121171657">TSensor 控制器自动按给定周期产生一次数据中断。例如，如果设定周期为 1 秒，则每 1 秒就会触发一次中断。</li><li class="- topic/li li" data-ofbid="d239398e105__20250121171657">中断处理函数会响应该中断信号，并通过 <code class="+ topic/ph pr-d/codeph ph codeph">INT Flag</code> 来区分是哪个通道有数据。</li><li class="- topic/li li" data-ofbid="d239398e110__20250121171657">中断处理函数会逐个通道扫描，将每个通道的数据读出，并缓存到全局变量中，供后续的用户层应用访问和使用。</li></ol></div>
</li></ul>
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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="#tsensor_key_procedures__section_u3t_ngg_f1c" data-tocid="tsensor_key_procedures__section_u3t_ngg_f1c">初始化流程</a></div></li><li class="section-item"><div class="section-title"><a href="#tsensor_key_procedures__section_x4q_dct_c1c" data-tocid="tsensor_key_procedures__section_x4q_dct_c1c">中断处理流程</a></div></li></ul></div>
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