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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" 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" href="http://aicdocco/taskstopics/sdk/hrtimer/hrtimer-design_intro.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">设计说明</h1>
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<div class="date inPage">16 May 2025</div><div style="color: gray;">
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Read time: 6 minute(s)
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</div>
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<div class="- topic/body body">
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2025-07-22 11:15:46 +08:00
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<p class="- topic/p p" data-ofbid="d97106e28__20250519091514">HRTimer
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源代码位于 <span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/</span>：</p>
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<ul class="- topic/ul ul simple" id="id__ul_skt_s3d_bdc" data-ofbid="id__ul_skt_s3d_bdc">
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<li class="- topic/li li" data-ofbid="d97106e36__20250519091514">
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<p class="- topic/p p" data-ofbid="d97106e38__20250519091514"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/drv/hrtimer/drv_hrtimer.c</span>，HRTimer
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Driver 层实现</p>
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</li>
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<li class="- topic/li li" data-ofbid="d97106e44__20250519091514">
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<p class="- topic/p p" data-ofbid="d97106e46__20250519091514"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/include/drv/drv_hrtimer.h</span>，HRTimer
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Driver 层接口</p>
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</li>
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2025-07-22 11:15:46 +08:00
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<li class="- topic/li li" data-ofbid="d97106e52__20250519091514">
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<p class="- topic/p p" data-ofbid="d97106e54__20250519091514"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/hal/pwmcs/hal_cap.c</span>，PWMCS CAP
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模块的 HAL 层实现</p>
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</li>
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2025-07-22 11:15:46 +08:00
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<li class="- topic/li li" data-ofbid="d97106e60__20250519091514">
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<p class="- topic/p p" data-ofbid="d97106e62__20250519091514"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/include/hal/hal_cap.h</span>，PWMCS CAP
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模块的 HAL 层接口头文件</p>
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</li>
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</ul>
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<section class="- topic/section section" id="id__id3" data-ofbid="id__id3"><h2 class="- topic/title title sectiontitle">软件架构</h2>
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<p class="- topic/p p" data-ofbid="d97106e74__20250519091514">HRTimer 驱动 Driver 层采用 RT-Thread 的 hwtimer 设备驱动框架，如果只使用
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2025-01-23 16:37:00 +08:00
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HAL
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层也可以支持 baremetal 方式的应用场景。</p>
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<figure class="- topic/fig fig fignone" id="id__id7" data-ofbid="id__id7">
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<br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_tkt_s3d_bdc" src="../../../images/hrtimer/sw_system6.png" alt="sw_system6"/></div><br/>
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<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">HRTimer 驱动的软件架构图</span></figcaption></figure>
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</section>
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2025-07-22 11:15:46 +08:00
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<section class="- topic/section section" data-ofbid="d97106e90__20250519091514"><h2 class="- topic/title title sectiontitle">关键流程设计</h2>
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<div class="- topic/div div section" id="id__id5">
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<strong class="+ topic/ph hi-d/b ph b">初始化流程</strong>
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<p class="- topic/p p" data-ofbid="d97106e100__20250519091514">HRTimer 驱动的初始化接口通过 <span class="+ topic/keyword pr-d/apiname keyword apiname">INIT_DEVICE_EXPORT(drv_hwtimer_init)</span>
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2025-01-23 16:37:00 +08:00
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完成，主要是通过调用 hwtimer 子系统的接口 <span class="+ topic/keyword pr-d/apiname keyword apiname">rt_device_hwtimer_register()</span> 注册一个
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hwtimer
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设备。</p><p class="- topic/p p" data-ofbid="d97106e109__20250519091514">CAP
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控制器的配置过程主要步骤如下：</p><ol class="- topic/ol ol arabic simple" id="id__ol_ukt_s3d_bdc" data-ofbid="id__ol_ukt_s3d_bdc">
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<li class="- topic/li li" data-ofbid="d97106e114__20250519091514">
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<p class="- topic/p p" data-ofbid="d97106e116__20250519091514">初始化 PWMCS 模块的 clk，确保 PWMCS 模块的时钟已经正确配置并启用。</p>
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2025-04-23 17:54:31 +08:00
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</li>
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2025-07-22 11:15:46 +08:00
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<li class="- topic/li li" data-ofbid="d97106e120__20250519091514">
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<p class="- topic/p p" data-ofbid="d97106e122__20250519091514">使能 CAP 指定通道的 clk，并设置为 PWM 计数模式，以便能够进行脉冲宽度调制（PWM）信号的捕获和计数。。</p>
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</li>
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<li class="- topic/li li" data-ofbid="d97106e126__20250519091514">
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<p class="- topic/p p" data-ofbid="d97106e128__20250519091514">设置 CAP 的初始值 (cnt)。初始值决定了计数器从哪个数值开始计数。</p>
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</li>
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<li class="- topic/li li" data-ofbid="d97106e132__20250519091514">
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<p class="- topic/p p" data-ofbid="d97106e134__20250519091514">使能 CAP 的中断功能，以便在特定事件发生时触发中断处理程序。。</p>
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</li>
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<li class="- topic/li li" data-ofbid="d97106e138__20250519091514">
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<p class="- topic/p p" data-ofbid="d97106e140__20250519091514">启动 CAP 计数，使其开始对输入信号进行计数。。</p>
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</li>
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</ol></div></section>
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2025-07-22 11:15:46 +08:00
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<section class="- topic/section section" data-ofbid="d97106e145__20250519091514"><h2 class="- topic/title title sectiontitle">数据结构设计</h2>
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2025-01-23 16:37:00 +08:00
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<div class="- topic/div div section" id="id__struct-aic-cap-arg">
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<strong class="+ topic/ph hi-d/b ph b">struct aic_cap_arg</strong>
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<div class="- topic/p p" data-ofbid="d97106e154__20250519091514">属于 HAL 层接口，记录每一个
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CAP
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通道的配置信息：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_gbs_js5_cdc" data-ofbid="id__codeblock_gbs_js5_cdc"><strong class="hl-keyword">struct</strong> aic_cap_arg {
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u16 available;
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u16 id;
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u32 freq;
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u32 prd;
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u32 irq_cnt;
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};</pre></div></div><div class="- topic/div div section" id="id__struct-hrtimer-info">
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<strong class="+ topic/ph hi-d/b ph b">struct hrtimer_info</strong>
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<div class="- topic/p p" data-ofbid="d97106e163__20250519091514">属于 Driver
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层接口，记录一个 HRTimer 设备的配置信息：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_u5k_ks5_cdc" data-ofbid="id__codeblock_u5k_ks5_cdc"><strong class="hl-keyword">struct</strong> hrtimer_info {
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<strong class="hl-keyword">char</strong> name[<span class="hl-number">12</span>];
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u32 id;
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rt_hwtimer_t hrtimer;
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};</pre></div>
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</div></section>
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<section class="- topic/section section" id="id__driver" data-ofbid="id__driver"><h2 class="- topic/title title sectiontitle">Driver 层接口设计</h2>
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2025-01-23 16:37:00 +08:00
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2025-07-22 11:15:46 +08:00
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<div class="- topic/p p" data-ofbid="d97106e175__20250519091514"><span class="+ topic/keyword pr-d/apiname keyword apiname">struct rt_hwtimer_ops</span> 接口是 hwtimer 设备驱动框架的标准接口，定义了一组操作函数，用于初始化、启动、停止、获取计数值和控制硬件定时器：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_rqw_ks5_cdc" data-ofbid="id__codeblock_rqw_ks5_cdc"><strong class="hl-keyword">struct</strong> rt_hwtimer_ops
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{
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<strong class="hl-keyword">void</strong> (*init)(<strong class="hl-keyword">struct</strong> rt_hwtimer_device *timer, rt_uint32_t state);
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rt_err_t (*start)(<strong class="hl-keyword">struct</strong> rt_hwtimer_device *timer, rt_uint32_t cnt, rt_hwtimer_mode_t mode);
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<strong class="hl-keyword">void</strong> (*stop)(<strong class="hl-keyword">struct</strong> rt_hwtimer_device *timer);
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rt_uint32_t (*count_get)(<strong class="hl-keyword">struct</strong> rt_hwtimer_device *timer);
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rt_err_t (*control)(<strong class="hl-keyword">struct</strong> rt_hwtimer_device *timer, rt_uint32_t cmd, <strong class="hl-keyword">void</strong> *args);
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};</pre>
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2025-04-23 17:54:31 +08:00
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<div class="table-container"><table class="- topic/table table frame-all" id="id__table_ykt_s3d_bdc" data-ofbid="id__table_ykt_s3d_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">drv_hrtimer_init</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead">
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<tr class="- topic/row">
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2025-07-22 11:15:46 +08:00
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<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_ykt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e200__20250519091514">函数原型</p></th>
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<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_ykt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e204__20250519091514">void drv_hrtimer_init(rt_hwtimer_t *timer, rt_uint32_t
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2025-04-23 17:54:31 +08:00
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state)</p></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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2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_ykt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e214__20250519091514">功能说明</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_ykt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e218__20250519091514">初始化配置一路 Timer</p></td>
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2025-04-23 17:54:31 +08:00
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</tr>
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<tr class="- topic/row">
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2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_ykt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e225__20250519091514">参数定义</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_ykt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e229__20250519091514">
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2025-01-23 16:37:00 +08:00
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<div class="- topic/div div">
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<div class="- topic/div div">timer - 指向 rt_hwtimer_t 设备的指针</div>
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<div class="- topic/div div">state - 1，表示打开；0，表示关闭</div>
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</div>
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2025-04-23 17:54:31 +08:00
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</p></td>
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</tr>
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<tr class="- topic/row">
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2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_ykt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e245__20250519091514">返回值</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_ykt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e249__20250519091514">无</p></td>
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</tr>
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<tr class="- topic/row">
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2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_ykt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e256__20250519091514">注意事项</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_ykt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e260__20250519091514">-</p></td>
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2025-04-23 17:54:31 +08:00
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</tr>
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</tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="id__table_zkt_s3d_bdc" data-ofbid="id__table_zkt_s3d_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">drv_hrtimer_start</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead">
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<tr class="- topic/row">
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2025-07-22 11:15:46 +08:00
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<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_zkt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e282__20250519091514">函数原型</p></th>
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<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_zkt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e286__20250519091514">rt_err_t drv_hrtimer_start(rt_hwtimer_t *timer, rt_uint32_t
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2025-04-23 17:54:31 +08:00
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cnt, rt_hwtimer_mode_t mode)</p></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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2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_zkt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e296__20250519091514">功能说明</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_zkt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e300__20250519091514">启动 Timer</p></td>
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2025-04-23 17:54:31 +08:00
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</tr>
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<tr class="- topic/row">
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2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_zkt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e307__20250519091514">参数定义</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_zkt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e311__20250519091514">
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2025-01-23 16:37:00 +08:00
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<div class="- topic/div div">
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<div class="- topic/div div">timer - 指向 rt_hwtimer_t 设备的指针</div>
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<div class="- topic/div div">cnt - Timer 的超时计数，单位是:1/Freq 秒</div>
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<div class="- topic/div div">mode - Oneshot、或 Period 类型</div>
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</div>
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2025-04-23 17:54:31 +08:00
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</p></td>
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</tr>
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<tr class="- topic/row">
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2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_zkt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e330__20250519091514">返回值</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_zkt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e334__20250519091514">0，成功；<0，失败</p></td>
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2025-04-23 17:54:31 +08:00
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</tr>
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<tr class="- topic/row">
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2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_zkt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e341__20250519091514">注意事项</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_zkt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e345__20250519091514">-</p></td>
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</tr>
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</tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="id__table_alt_s3d_bdc" data-ofbid="id__table_alt_s3d_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">drv_hrtimer_stop</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead">
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<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
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<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_alt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e367__20250519091514">函数原型</p></th>
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<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_alt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e371__20250519091514">void drv_hrtimer_stop(rt_hwtimer_t *timer)</p></th>
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2025-04-23 17:54:31 +08:00
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</tr>
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</thead><tbody class="- topic/tbody tbody">
|
|
|
|
|
|
<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
|
|
|
|
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_alt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e381__20250519091514">功能说明</p></td>
|
|
|
|
|
|
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_alt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e385__20250519091514">停止 Timer</p></td>
|
2025-04-23 17:54:31 +08:00
|
|
|
|
</tr>
|
|
|
|
|
|
<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
|
|
|
|
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_alt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e392__20250519091514">参数定义</p></td>
|
|
|
|
|
|
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_alt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e396__20250519091514">
|
2025-01-23 16:37:00 +08:00
|
|
|
|
<div class="- topic/div div">
|
|
|
|
|
|
<div class="- topic/div div">timer - 指向 rt_hwtimer_t 设备的指针</div>
|
|
|
|
|
|
</div>
|
2025-04-23 17:54:31 +08:00
|
|
|
|
</p></td>
|
|
|
|
|
|
</tr>
|
|
|
|
|
|
<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
|
|
|
|
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_alt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e409__20250519091514">返回值</p></td>
|
|
|
|
|
|
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_alt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e413__20250519091514">无</p></td>
|
2025-04-23 17:54:31 +08:00
|
|
|
|
</tr>
|
|
|
|
|
|
<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
|
|
|
|
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_alt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e420__20250519091514">注意事项</p></td>
|
|
|
|
|
|
<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_alt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e424__20250519091514">-</p></td>
|
2025-04-23 17:54:31 +08:00
|
|
|
|
</tr>
|
|
|
|
|
|
</tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="id__table_blt_s3d_bdc" data-ofbid="id__table_blt_s3d_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">drv_hrtimer_ctrl</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead">
|
|
|
|
|
|
<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
|
|
|
|
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_blt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e446__20250519091514">函数原型</p></th>
|
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|
|
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|
<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_blt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e450__20250519091514">rt_err_t drv_hrtimer_ctrl(rt_hwtimer_t *timer, rt_uint32_t
|
2025-04-23 17:54:31 +08:00
|
|
|
|
cmd, void *args)</p></th>
|
|
|
|
|
|
</tr>
|
|
|
|
|
|
</thead><tbody class="- topic/tbody tbody">
|
|
|
|
|
|
<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
|
|
|
|
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_blt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e460__20250519091514">功能说明</p></td>
|
|
|
|
|
|
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_blt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e464__20250519091514">HRTimer 驱动的 ioctl 接口</p></td>
|
2025-04-23 17:54:31 +08:00
|
|
|
|
</tr>
|
|
|
|
|
|
<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
|
|
|
|
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_blt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e471__20250519091514">参数定义</p></td>
|
|
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|
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_blt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e475__20250519091514">
|
2025-01-23 16:37:00 +08:00
|
|
|
|
<div class="- topic/div div">
|
|
|
|
|
|
<div class="- topic/div div">timer - 指向 rt_hwtimer_t 设备的指针</div>
|
|
|
|
|
|
<div class="- topic/div div">cmd - ioctl 命令码</div>
|
|
|
|
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|
<div class="- topic/div div">args - ioctl 命令相应的参数</div>
|
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|
|
</div>
|
2025-04-23 17:54:31 +08:00
|
|
|
|
</p></td>
|
|
|
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|
|
</tr>
|
|
|
|
|
|
<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
|
|
|
|
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_blt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e494__20250519091514">返回值</p></td>
|
|
|
|
|
|
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_blt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e498__20250519091514">0，成功；<0，失败</p></td>
|
2025-04-23 17:54:31 +08:00
|
|
|
|
</tr>
|
|
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|
|
|
<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
|
|
|
|
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_blt_s3d_bdc__entry__1"><p class="- topic/p p" data-ofbid="d97106e505__20250519091514">注意事项</p></td>
|
|
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|
|
<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_blt_s3d_bdc__entry__2"><p class="- topic/p p" data-ofbid="d97106e509__20250519091514">目前仅支持设置 Timer 的 Freq 值</p></td>
|
2025-04-23 17:54:31 +08:00
|
|
|
|
</tr>
|
|
|
|
|
|
</tbody></table></div>
|
2025-01-23 16:37:00 +08:00
|
|
|
|
</div>
|
2025-04-23 17:54:31 +08:00
|
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|
</section>
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|
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|
|
<section class="- topic/section section" id="id__hal" data-ofbid="id__hal"><h2 class="- topic/title title sectiontitle">HAL 层接口设计</h2>
|
2025-01-23 16:37:00 +08:00
|
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|
2025-07-22 11:15:46 +08:00
|
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|
<div class="- topic/p p" data-ofbid="d97106e523__20250519091514">HAL 层的函数接口声明存放在 <span class="+ topic/ph sw-d/filepath ph filepath">hal_cap.h</span> 中。<span class="+ topic/ph sw-d/filepath ph filepath">hal_cap.h</span>
|
2025-01-23 16:37:00 +08:00
|
|
|
|
是一个头文件，其中声明了与硬件抽象层 (HAL) 相关的函数接口。这些接口主要用于初始化、配置和控制捕获/比较单元
|
|
|
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|
|
(CAP)，如下所示：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_gnn_ls5_cdc" data-ofbid="id__codeblock_gnn_ls5_cdc"><strong class="hl-keyword">void</strong> hal_cap_ch_init(u32 ch);
|
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|
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|
<strong class="hl-keyword">void</strong> hal_cap_ch_deinit(u32 ch);
|
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|
<strong class="hl-keyword">void</strong> hal_cap_int_enable(u32 ch, <strong class="hl-keyword">int</strong> enable);
|
|
|
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|
|
u32 hal_cap_is_pending(u32 ch);
|
|
|
|
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|
<strong class="hl-keyword">int</strong> hal_cap_set_freq(u32 ch, u32 freq);
|
|
|
|
|
|
<strong class="hl-keyword">int</strong> hal_cap_set_cnt(u32 ch, u32 cnt);
|
|
|
|
|
|
<strong class="hl-keyword">int</strong> hal_cap_get(u32 ch);
|
|
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|
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|
<strong class="hl-keyword">int</strong> hal_cap_enable(u32 ch);
|
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|
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|
<strong class="hl-keyword">int</strong> hal_cap_disable(u32 ch);
|
|
|
|
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|
<strong class="hl-keyword">void</strong> hal_cap_cnt_start(u32 ch);
|
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|
<strong class="hl-keyword">void</strong> hal_cap_cnt_stop(u32 ch);
|
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|
<strong class="hl-keyword">int</strong> hal_cap_init(<strong class="hl-keyword">void</strong>);
|
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|
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|
<strong class="hl-keyword">int</strong> hal_cap_deinit(<strong class="hl-keyword">void</strong>);
|
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|
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|
|
|
|
|
<strong class="hl-keyword">void</strong> hal_cap_status_show(<strong class="hl-keyword">void</strong>);</pre></div>
|
2025-04-23 17:54:31 +08:00
|
|
|
|
</section>
|
|
|
|
|
|
<section class="- topic/section section" id="id__demo" data-ofbid="id__demo"><h2 class="- topic/title title sectiontitle">Demo</h2>
|
2025-01-23 16:37:00 +08:00
|
|
|
|
|
|
|
|
|
|
|
2025-07-22 11:15:46 +08:00
|
|
|
|
<div class="- topic/p p" data-ofbid="d97106e544__20250519091514">以下代码示例展示了一个用于测试高精度定时器 (HRTIMER) 的 Demo，包括了定时器的回调函数和命令行接口，用于配置和启动定时器。本 Demo 仅截取
|
2025-01-23 16:37:00 +08:00
|
|
|
|
<code class="+ topic/ph pr-d/codeph ph codeph">test_hrtimer</code> 的部分源码，完整源码位于
|
|
|
|
|
|
<span class="+ topic/ph sw-d/filepath ph filepath">bsp/examples/test-hrtimer/test_hrtimer.c</span>：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_lvv_ls5_cdc" data-ofbid="id__codeblock_lvv_ls5_cdc"><em class="hl-comment">/* Timer timeout callback function */</em>
|
|
|
|
|
|
<strong class="hl-keyword">static</strong> rt_err_t hrtimer_cb(rt_device_t dev, rt_size_t size)
|
|
|
|
|
|
{
|
|
|
|
|
|
<strong class="hl-keyword">struct</strong> hrtimer_info *info = (<strong class="hl-keyword">struct</strong> hrtimer_info *)dev->user_data;
|
|
|
|
|
|
|
|
|
|
|
|
<strong class="hl-keyword">if</strong> (g_debug)
|
|
|
|
|
|
printf(<span class="hl-string">"%d/%d hrtimer%d timeout callback! Elapsed %ld us\n"</span>,
|
|
|
|
|
|
g_loop_cnt, g_loop_max,
|
|
|
|
|
|
info->id, aic_timer_get_us() - g_start_us);
|
|
|
|
|
|
|
|
|
|
|
|
g_start_us = aic_timer_get_us();
|
|
|
|
|
|
g_loop_cnt++;
|
|
|
|
|
|
<strong class="hl-keyword">if</strong> ((g_loop_max > <span class="hl-number">1</span>) && (g_loop_cnt > g_loop_max))
|
|
|
|
|
|
rt_device_control(g_hrtimer_dev[info->id], HWTIMER_CTRL_STOP, NULL);
|
|
|
|
|
|
|
|
|
|
|
|
<strong class="hl-keyword">return</strong> RT_EOK;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">void</strong> cmd_test_hrtimer(<strong class="hl-keyword">int</strong> argc, <strong class="hl-keyword">char</strong> *argv[])
|
|
|
|
|
|
{
|
|
|
|
|
|
rt_err_t ret = RT_EOK;
|
|
|
|
|
|
u32 c, ch = <span class="hl-number">0</span>;
|
|
|
|
|
|
rt_hwtimerval_t tm = {<span class="hl-number">0</span>};
|
|
|
|
|
|
rt_hwtimer_mode_t mode = HWTIMER_MODE_ONESHOT;
|
|
|
|
|
|
|
|
|
|
|
|
optind = <span class="hl-number">0</span>;
|
|
|
|
|
|
<strong class="hl-keyword">while</strong> ((c = getopt_long(argc, argv, sopts, lopts, NULL)) != -<span class="hl-number">1</span>) {
|
|
|
|
|
|
<strong class="hl-keyword">switch</strong> (c) {
|
|
|
|
|
|
<strong class="hl-keyword">case</strong> <span class="hl-string">'m'</span>:
|
|
|
|
|
|
<strong class="hl-keyword">if</strong> (strncasecmp(<span class="hl-string">"period"</span>, optarg, strlen(optarg)) == <span class="hl-number">0</span>)
|
|
|
|
|
|
mode = HWTIMER_MODE_PERIOD;
|
|
|
|
|
|
<strong class="hl-keyword">continue</strong>;
|
|
|
|
|
|
|
|
|
|
|
|
<strong class="hl-keyword">case</strong> <span class="hl-string">'c'</span>:
|
|
|
|
|
|
ch = atoi(optarg);
|
|
|
|
|
|
<strong class="hl-keyword">if</strong> (ch > AIC_HRTIMER_CH_NUM) {
|
|
|
|
|
|
pr_err(<span class="hl-string">"Channel number %s is invalid\n"</span>, optarg);
|
|
|
|
|
|
<strong class="hl-keyword">return</strong>;
|
|
|
|
|
|
}
|
|
|
|
|
|
<strong class="hl-keyword">continue</strong>;
|
|
|
|
|
|
|
|
|
|
|
|
<strong class="hl-keyword">case</strong> <span class="hl-string">'s'</span>:
|
|
|
|
|
|
tm.sec = atoi(optarg);
|
|
|
|
|
|
<strong class="hl-keyword">continue</strong>;
|
|
|
|
|
|
|
|
|
|
|
|
<strong class="hl-keyword">case</strong> <span class="hl-string">'u'</span>:
|
|
|
|
|
|
tm.usec = atoi(optarg);
|
|
|
|
|
|
<strong class="hl-keyword">continue</strong>;
|
|
|
|
|
|
|
|
|
|
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|
<strong class="hl-keyword">case</strong> <span class="hl-string">'d'</span>:
|
|
|
|
|
|
g_debug = <span class="hl-number">1</span>;
|
|
|
|
|
|
<strong class="hl-keyword">continue</strong>;
|
|
|
|
|
|
|
|
|
|
|
|
<strong class="hl-keyword">case</strong> <span class="hl-string">'h'</span>:
|
|
|
|
|
|
usage(argv[<span class="hl-number">0</span>]);
|
|
|
|
|
|
<strong class="hl-keyword">return</strong>;
|
|
|
|
|
|
|
|
|
|
|
|
<strong class="hl-keyword">default</strong>:
|
|
|
|
|
|
pr_err(<span class="hl-string">"Invalid argument\n"</span>);
|
|
|
|
|
|
usage(argv[<span class="hl-number">0</span>]);
|
|
|
|
|
|
<strong class="hl-keyword">return</strong>;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
<strong class="hl-keyword">if</strong> ((tm.sec == <span class="hl-number">0</span>) && (tm.usec == <span class="hl-number">0</span>)) {
|
|
|
|
|
|
pr_err(<span class="hl-string">"Invalid argument\n"</span>);
|
|
|
|
|
|
usage(argv[<span class="hl-number">0</span>]);
|
|
|
|
|
|
<strong class="hl-keyword">return</strong>;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
<strong class="hl-keyword">if</strong> (!g_hrtimer_dev[ch]) {
|
|
|
|
|
|
<strong class="hl-keyword">char</strong> name[<span class="hl-number">10</span>] = <span class="hl-string">""</span>;
|
|
|
|
|
|
|
|
|
|
|
|
snprintf(name, <span class="hl-number">10</span>, <span class="hl-string">"hrtimer%d"</span>, ch);
|
|
|
|
|
|
<em class="hl-comment">/* find timer device */</em>
|
|
|
|
|
|
g_hrtimer_dev[ch] = rt_device_find(name);
|
|
|
|
|
|
<strong class="hl-keyword">if</strong> (g_hrtimer_dev[ch] == RT_NULL) {
|
|
|
|
|
|
pr_err(<span class="hl-string">"Can't find %s device!\n"</span>, name);
|
|
|
|
|
|
<strong class="hl-keyword">return</strong>;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
<em class="hl-comment">/* Open the device in read-write mode */</em>
|
|
|
|
|
|
ret = rt_device_open(g_hrtimer_dev[ch], RT_DEVICE_OFLAG_RDWR);
|
|
|
|
|
|
<strong class="hl-keyword">if</strong> (ret != RT_EOK) {
|
|
|
|
|
|
pr_err(<span class="hl-string">"Failed to open %s device!\n"</span>, name);
|
|
|
|
|
|
<strong class="hl-keyword">return</strong>;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
<em class="hl-comment">/* set timeout callback function */</em>
|
|
|
|
|
|
rt_device_set_rx_indicate(g_hrtimer_dev[ch], hrtimer_cb);
|
|
|
|
|
|
|
|
|
|
|
|
ret = rt_device_control(g_hrtimer_dev[ch], HWTIMER_CTRL_MODE_SET, &mode);
|
|
|
|
|
|
<strong class="hl-keyword">if</strong> (ret != RT_EOK) {
|
|
|
|
|
|
pr_err(<span class="hl-string">"Failed to set mode! ret is %d\n"</span>, ret);
|
|
|
|
|
|
<strong class="hl-keyword">return</strong>;
|
|
|
|
|
|
}
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printf(<span class="hl-string">"hrtimer%d: Create a timer of %d.%06d sec, %s mode\n"</span>,
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ch, tm.sec, tm.usec,
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mode == HWTIMER_MODE_ONESHOT ? <span class="hl-string">"Oneshot"</span> : <span class="hl-string">"Period"</span>);
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<strong class="hl-keyword">if</strong> (mode != HWTIMER_MODE_ONESHOT) {
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g_loop_max = HRTIMER_MAX_ELAPSE / (tm.sec * USEC_PER_SEC + tm.usec);
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printf(<span class="hl-string">"\tWill loop %d times\n"</span>, g_loop_max);
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}
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g_loop_cnt = <span class="hl-number">0</span>;
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g_start_us = aic_timer_get_us();
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<strong class="hl-keyword">if</strong> (!rt_device_write(g_hrtimer_dev[ch], <span class="hl-number">0</span>, &tm, <strong class="hl-keyword">sizeof</strong>(tm))) {
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pr_err(<span class="hl-string">"set timeout value failed\n"</span>);
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<strong class="hl-keyword">return</strong>;
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}
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}
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MSH_CMD_EXPORT_ALIAS(cmd_test_hrtimer, test_hrtimer, test hrtimer);</pre></div>
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2025-04-23 17:54:31 +08:00
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</section>
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</div>
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</article></main></div>
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2025-01-23 16:37:00 +08:00
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<div class="generation_time">
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Update Time: 2025-05-19
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