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href="../../../topics/sdk/mac/mac_user_guide_2.html" id="id-d5856e6011-link">MAC 使用指南</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-safety-d5856e6083" class="topicref" data-id="chapter-safety" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-safety-d5856e6083-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-safety-sdk.html" id="chapter-safety-d5856e6083-link">安全</a><div class="wh-tooltip"><p class="shortdesc">SPI ENC、CE、eFuse 等安全模块的介绍和使用说明。</p></div></div></div></li></ul></li></ul></div>
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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/cap/cap_design.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">设计说明</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
|
||
Read time: 4 minute(s)
|
||
</div><div class="- topic/body body"><section class="- topic/section section" id="id__section_y5v_gpf_fdc" data-ofbid="id__section_y5v_gpf_fdc"><h2 class="- topic/title title sectiontitle">源码说明</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d108985e24__20250121171546">源代码位于 <span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/</span>： </p>
|
||
<ul class="- topic/ul ul simple" id="id__ul_azy_svh_fdc" data-ofbid="id__ul_azy_svh_fdc"><li class="- topic/li li" data-ofbid="d108985e31__20250121171546">
|
||
<p class="- topic/p p" data-ofbid="d108985e33__20250121171546"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/drv/cap/drv_cap.c</span>，CAP Driver 层实现</p>
|
||
</li><li class="- topic/li li" data-ofbid="d108985e38__20250121171546">
|
||
<p class="- topic/p p" data-ofbid="d108985e40__20250121171546"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/hal/pwmcs/hal_cap.c</span>，PWMCS CAP 模块的 HAL
|
||
层实现</p>
|
||
</li><li class="- topic/li li" data-ofbid="d108985e45__20250121171546">
|
||
<p class="- topic/p p" data-ofbid="d108985e47__20250121171546"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/include/hal/hal_cap.h</span>，PWMCS CAP 模块的 HAL
|
||
层接口头文件</p>
|
||
</li></ul>
|
||
</section><section class="- topic/section section" id="id__section_k2y_jwh_fdc" data-ofbid="id__section_k2y_jwh_fdc"><h2 class="- topic/title title sectiontitle">模块架构</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d108985e58__20250121171546">CAP 驱动 Driver 层采用 RT-Thread 的 INPUT CAPTURE 设备驱动框架，如果只使用 HAL 层也可以支持 Baremetal
|
||
方式的应用场景。</p>
|
||
<figure class="- topic/fig fig fignone" id="id__id7" data-ofbid="id__id7"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_bzy_svh_fdc" src="../../../images/cap/cap_sw_system.png" alt="sw_system"/></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">CAP 驱动的软件架构图</span></figcaption></figure>
|
||
</section><section class="- topic/section section" id="id__section_lxl_lwh_fdc" data-ofbid="id__section_lxl_lwh_fdc"><h2 class="- topic/title title sectiontitle">关键流程设计</h2>
|
||
|
||
<div class="- topic/div div section" id="id__id5">
|
||
<strong class="+ topic/ph hi-d/b ph b">初始化流程</strong>
|
||
<p class="- topic/p p" data-ofbid="d108985e78__20250121171546">CAP 驱动的初始化接口通过 <span class="+ topic/keyword pr-d/apiname keyword apiname">INIT_DEVICE_EXPORT(drv_cap_init)</span> 完成，主要是通过调用 INPUT
|
||
CAPTURE 子系统的接口 rt_device_inputcapture_register() 注册一个 CAP 设备。</p><p class="- topic/p p" data-ofbid="d108985e83__20250121171546">CAP
|
||
控制器的配置过程，主要步骤有：</p><ol class="- topic/ol ol arabic simple" id="id__ol_czy_svh_fdc" data-ofbid="id__ol_czy_svh_fdc"><li class="- topic/li li" data-ofbid="d108985e86__20250121171546">
|
||
<p class="- topic/p p" data-ofbid="d108985e88__20250121171546">初始化 PWMCS 模块的 clk</p>
|
||
</li><li class="- topic/li li" data-ofbid="d108985e91__20250121171546">
|
||
<p class="- topic/p p" data-ofbid="d108985e93__20250121171546">使能 CAP 指定通道的 clk</p>
|
||
</li><li class="- topic/li li" data-ofbid="d108985e96__20250121171546">
|
||
<p class="- topic/p p" data-ofbid="d108985e98__20250121171546">设置 CAP 捕捉事件</p>
|
||
</li><li class="- topic/li li" data-ofbid="d108985e101__20250121171546">
|
||
<p class="- topic/p p" data-ofbid="d108985e103__20250121171546">使能 CAP 的中断</p>
|
||
</li><li class="- topic/li li" data-ofbid="d108985e106__20250121171546">
|
||
<p class="- topic/p p" data-ofbid="d108985e108__20250121171546">启动 CAP 计数</p>
|
||
</li></ol></div>
|
||
</section><section class="- topic/section section" id="id__section_swl_lwh_fdc" data-ofbid="id__section_swl_lwh_fdc"><h2 class="- topic/title title sectiontitle">数据结构设计</h2>
|
||
|
||
<div class="- topic/div div section" id="id__struct-aic-cap-data">
|
||
<strong class="+ topic/ph hi-d/b ph b">struct aic_cap_data</strong>
|
||
<div class="- topic/p p" data-ofbid="d108985e122__20250121171546">属于 HAL 层接口，记录每一个 CAP
|
||
通道的捕捉数据信息：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_bfv_qwh_fdc" data-ofbid="id__codeblock_bfv_qwh_fdc"><strong class="hl-keyword">struct</strong> aic_cap_data {
|
||
u8 id;
|
||
u32 freq;
|
||
<strong class="hl-keyword">float</strong> duty;
|
||
};</pre></div>
|
||
</div>
|
||
<div class="- topic/div div section" id="id__struct-aic-cap">
|
||
<strong class="+ topic/ph hi-d/b ph b">struct aic_cap</strong>
|
||
<div class="- topic/p p" data-ofbid="d108985e133__20250121171546">属于 Driver 层接口，记录一个 CAP
|
||
设备的配置信息：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_zfz_qwh_fdc" data-ofbid="id__codeblock_zfz_qwh_fdc"><strong class="hl-keyword">struct</strong> aic_cap {
|
||
<strong class="hl-keyword">struct</strong> rt_inputcapture_device rtdev;
|
||
<strong class="hl-keyword">struct</strong> aic_cap_data *data;
|
||
};</pre></div>
|
||
</div>
|
||
<div class="- topic/div div section" id="id__driver">
|
||
<strong class="+ topic/ph hi-d/b ph b">Driver 层接口设计</strong>
|
||
<div class="- topic/p p" data-ofbid="d108985e144__20250121171546">以下接口是 INPUT CAPTURE
|
||
设备驱动框架的标准接口。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_j54_rwh_fdc" data-ofbid="id__codeblock_j54_rwh_fdc"><strong class="hl-keyword">struct</strong> rt_inputcapture_ops
|
||
{
|
||
rt_err_t (*init)(<strong class="hl-keyword">struct</strong> rt_inputcapture_device *inputcapture);
|
||
rt_err_t (*open)(<strong class="hl-keyword">struct</strong> rt_inputcapture_device *inputcapture);
|
||
rt_err_t (*close)(<strong class="hl-keyword">struct</strong> rt_inputcapture_device *inputcapture);
|
||
rt_err_t (*get_pulsewidth)(<strong class="hl-keyword">struct</strong> rt_inputcapture_device *inputcapture, rt_uint32_t *pulsewidth_us);
|
||
};</pre></div><div class="table-container"><table class="- topic/table table frame-all" id="id__table_dzy_svh_fdc" data-ofbid="id__table_dzy_svh_fdc" 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">aic_cap_init</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_dzy_svh_fdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_dzy_svh_fdc__entry__2">static rt_err_t aic_cap_init(struct rt_inputcapture_device
|
||
*capture)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_dzy_svh_fdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_dzy_svh_fdc__entry__2">初始化配置一路 CAP</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_dzy_svh_fdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_dzy_svh_fdc__entry__2">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div">capture - 指向 rt_inputcapture_device 设备的指针</div>
|
||
</div>
|
||
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_dzy_svh_fdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_dzy_svh_fdc__entry__2">0，成功；<0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_dzy_svh_fdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_dzy_svh_fdc__entry__2">- </td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="id__table_ezy_svh_fdc" data-ofbid="id__table_ezy_svh_fdc" 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">aic_cap_open</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_ezy_svh_fdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_ezy_svh_fdc__entry__2">static rt_err_t aic_cap_open(struct rt_inputcapture_device
|
||
*capture)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_ezy_svh_fdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_ezy_svh_fdc__entry__2">打开 CAP</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_ezy_svh_fdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_ezy_svh_fdc__entry__2">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div">capture - 指向 rt_inputcapture_device 设备的指针</div>
|
||
</div>
|
||
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_ezy_svh_fdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_ezy_svh_fdc__entry__2">0，成功；<0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_ezy_svh_fdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_ezy_svh_fdc__entry__2">- </td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="id__table_fzy_svh_fdc" data-ofbid="id__table_fzy_svh_fdc" 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">aic_cap_close</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_fzy_svh_fdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_fzy_svh_fdc__entry__2">static rt_err_t aic_cap_close(struct rt_inputcapture_device
|
||
*capture)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_fzy_svh_fdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_fzy_svh_fdc__entry__2">关闭 CAP</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_fzy_svh_fdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_fzy_svh_fdc__entry__2">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div">capture - 指向 rt_inputcapture_device 设备的指针</div>
|
||
</div>
|
||
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_fzy_svh_fdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_fzy_svh_fdc__entry__2">0，成功；<0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_fzy_svh_fdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_fzy_svh_fdc__entry__2">- </td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="id__table_gzy_svh_fdc" data-ofbid="id__table_gzy_svh_fdc" 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">aic_cap_get_pulsewidth</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_gzy_svh_fdc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_gzy_svh_fdc__entry__2">static rt_err_t aic_cap_get_pulsewidth(struct
|
||
rt_inputcapture_device *capture, rt_uint32_t
|
||
*pulsewidth_us)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_gzy_svh_fdc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_gzy_svh_fdc__entry__2">计算占空比与周期值</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_gzy_svh_fdc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_gzy_svh_fdc__entry__2">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div">capture - 指向 rt_inputcapture_device 设备的指针</div>
|
||
<div class="- topic/div div">pulsewidth_us - RT-Thread 回调参数脉冲间隔变量的指针</div>
|
||
</div>
|
||
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_gzy_svh_fdc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_gzy_svh_fdc__entry__2">0，成功；<0，失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_gzy_svh_fdc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_gzy_svh_fdc__entry__2">AIC 除了提供标准回调参数 pulsewidth_us 外，另外提供了回调参数：频率与占空比</td></tr></tbody></table></div></div>
|
||
<div class="- topic/div div section" id="id__hal">
|
||
<strong class="+ topic/ph hi-d/b ph b">HAL 层接口设计</strong>
|
||
<div class="- topic/p p" data-ofbid="d108985e313__20250121171546">HAL 层的函数接口声明存放在 hal_cap.h
|
||
中，主要接口有：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_k1m_twh_fdc" data-ofbid="id__codeblock_k1m_twh_fdc"><strong class="hl-keyword">void</strong> hal_cap_ch_init(u32 ch);
|
||
<strong class="hl-keyword">void</strong> hal_cap_ch_deinit(u32 ch);
|
||
|
||
<strong class="hl-keyword">void</strong> hal_cap_int_enable(u32 ch, <strong class="hl-keyword">int</strong> enable);
|
||
u32 hal_cap_int_sta(<strong class="hl-keyword">void</strong>);
|
||
u32 hal_cap_is_pending(u32 ch);
|
||
<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);
|
||
<strong class="hl-keyword">int</strong> hal_cap_in_config(u32 ch);
|
||
u32 hal_cap_reg0(u32 ch);
|
||
u32 hal_cap_reg1(u32 ch);
|
||
u32 hal_cap_reg2(u32 ch);
|
||
u32 hal_cap_int_flg(u32 ch);
|
||
<strong class="hl-keyword">void</strong> hal_cap_clr_flg(u32 ch, u32 stat);
|
||
<strong class="hl-keyword">int</strong> hal_cap_enable(u32 ch);
|
||
<strong class="hl-keyword">int</strong> hal_cap_disable(u32 ch);
|
||
<strong class="hl-keyword">void</strong> hal_cap_cnt_start(u32 ch);
|
||
<strong class="hl-keyword">void</strong> hal_cap_cnt_stop(u32 ch);
|
||
|
||
<strong class="hl-keyword">int</strong> hal_cap_init(<strong class="hl-keyword">void</strong>);
|
||
<strong class="hl-keyword">int</strong> hal_cap_deinit(<strong class="hl-keyword">void</strong>);
|
||
|
||
<strong class="hl-keyword">void</strong> hal_cap_status_show(<strong class="hl-keyword">void</strong>);</pre></div></div>
|
||
</section><section class="- topic/section section" id="id__section_adb_nwh_fdc" data-ofbid="id__section_adb_nwh_fdc"><h2 class="- topic/title title sectiontitle">Demo</h2>
|
||
|
||
<div class="- topic/p p" data-ofbid="d108985e323__20250121171546">本 Demo 是 test_cap
|
||
的部分源码（bsp/examples/test-cap/test_cap.c）：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_stc_5wh_fdc" data-ofbid="id__codeblock_stc_5wh_fdc">#<span class="hl-directive">define</span> WATER_MARK <span class="hl-number">50</span>
|
||
|
||
<strong class="hl-keyword">struct</strong> aic_cap_usr {
|
||
rt_uint8_t id;
|
||
rt_uint32_t freq;
|
||
<strong class="hl-keyword">float</strong> duty;
|
||
};
|
||
|
||
<em class="hl-comment">/* callback function */</em>
|
||
<strong class="hl-keyword">static</strong> rt_err_t cap_cb(rt_device_t dev, rt_size_t size)
|
||
{
|
||
<strong class="hl-keyword">struct</strong> rt_inputcapture_data inputcap_data[WATER_MARK];
|
||
rt_device_read(dev, <span class="hl-number">0</span>, (<strong class="hl-keyword">void</strong> *)inputcap_data, size);
|
||
#ifdef ULOG_USING_ISR_LOG
|
||
<strong class="hl-keyword">struct</strong> aic_cap_usr *data = (<strong class="hl-keyword">struct</strong> aic_cap_usr *)dev->user_data;
|
||
|
||
rt_kprintf(<span class="hl-string">"cap%d: freq:%dHz, duty:%d.%02d%%\n"</span>,
|
||
data->id, data->freq, (rt_uint32_t)data->duty, (rt_uint32_t)(data->duty * <span class="hl-number">100</span>) % <span class="hl-number">100</span>);
|
||
|
||
<strong class="hl-keyword">for</strong> (<strong class="hl-keyword">int</strong> i = <span class="hl-number">0</span>; i < size; i++)
|
||
rt_kprintf(<span class="hl-string">"%s: pulsewidth:%d us\n"</span>, &dev->parent.name, inputcap_data[i].pulsewidth_us);
|
||
#endif
|
||
<strong class="hl-keyword">return</strong> RT_EOK;
|
||
}
|
||
|
||
<strong class="hl-keyword">int</strong> test_cap(<strong class="hl-keyword">int</strong> argc, <strong class="hl-keyword">char</strong> **argv)
|
||
{
|
||
rt_uint32_t watermark = WATER_MARK;
|
||
rt_device_t cap_dev = RT_NULL;
|
||
<strong class="hl-keyword">char</strong> device_name[<span class="hl-number">8</span>] = {<span class="hl-string">"cap"</span>};
|
||
<strong class="hl-keyword">int</strong> ret;
|
||
|
||
<strong class="hl-keyword">if</strong> (argc != <span class="hl-number">2</span>) {
|
||
rt_kprintf(<span class="hl-string">"Usage: test_cap <channel>\n"</span>);
|
||
<strong class="hl-keyword">return</strong> -RT_ERROR;
|
||
}
|
||
|
||
strcat(device_name, argv[<span class="hl-number">1</span>]);
|
||
|
||
cap_dev = rt_device_find(device_name);
|
||
<strong class="hl-keyword">if</strong> (cap_dev == RT_NULL) {
|
||
rt_kprintf(<span class="hl-string">"Can't find %s device!\n"</span>, device_name);
|
||
<strong class="hl-keyword">return</strong> -RT_ERROR;
|
||
}
|
||
|
||
<em class="hl-comment">/* set callback function */</em>
|
||
rt_device_set_rx_indicate(cap_dev, cap_cb);
|
||
|
||
ret = rt_device_control(cap_dev, INPUTCAPTURE_CMD_SET_WATERMARK, &watermark);
|
||
<strong class="hl-keyword">if</strong> (ret != RT_EOK) {
|
||
rt_kprintf(<span class="hl-string">"Failed to set %s device watermark!\n"</span>, device_name);
|
||
<strong class="hl-keyword">return</strong> ret;
|
||
}
|
||
|
||
ret = rt_device_open(cap_dev, RT_DEVICE_OFLAG_RDWR);
|
||
<strong class="hl-keyword">if</strong> (ret != RT_EOK) {
|
||
rt_kprintf(<span class="hl-string">"Failed to open %s device!\n"</span>, device_name);
|
||
<strong class="hl-keyword">return</strong> ret;
|
||
}
|
||
|
||
rt_kprintf(<span class="hl-string">"cap%d open.\n"</span>, atoi(argv[<span class="hl-number">1</span>]));
|
||
|
||
<strong class="hl-keyword">return</strong> RT_EOK;
|
||
}
|
||
MSH_CMD_EXPORT_ALIAS(test_cap, test_cap, Test the cap);</pre></div>
|
||
</section></div></article></main></div>
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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__section_y5v_gpf_fdc" data-tocid="id__section_y5v_gpf_fdc">源码说明</a></div></li><li class="section-item"><div class="section-title"><a href="#id__section_k2y_jwh_fdc" data-tocid="id__section_k2y_jwh_fdc">模块架构</a></div></li><li class="section-item"><div class="section-title"><a href="#id__section_lxl_lwh_fdc" data-tocid="id__section_lxl_lwh_fdc">关键流程设计</a></div></li><li class="section-item"><div class="section-title"><a href="#id__section_swl_lwh_fdc" data-tocid="id__section_swl_lwh_fdc">数据结构设计</a></div></li><li class="section-item"><div class="section-title"><a href="#id__section_adb_nwh_fdc" data-tocid="id__section_adb_nwh_fdc">Demo</a></div></li></ul></div>
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