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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/i2s/i2s_interface.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">接口设计</h1><div class="date inPage">5 Jul 2024</div><div style="color: gray;">
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Read time: 3 minute(s)
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</div><div class="- topic/body concept/conbody body conbody"><div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_g4x_sh3_d1c" data-ofbid="i2s_interface_design__table_g4x_sh3_d1c" 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_i2s_set_sysclk</span></caption><colgroup><col style="width:50%"/><col style="width:50%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_g4x_sh3_d1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_g4x_sh3_d1c__entry__2">static int aic_i2s_set_sysclk(struct snd_soc_dai *dai, int
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clk_id, unsigned int freq, int dir)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_g4x_sh3_d1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_g4x_sh3_d1c__entry__2">设置 S 模块输出的 mclk 时钟频率</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_g4x_sh3_d1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_g4x_sh3_d1c__entry__2">dai：指向 dai 的指针 | clk_id：要设置的时钟 id | freq：设置的时钟频率 | dir：
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unused</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_g4x_sh3_d1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_g4x_sh3_d1c__entry__2">0：执行成功 | -EINVAL：参数非法</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_g4x_sh3_d1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_g4x_sh3_d1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_h4x_sh3_d1c" data-ofbid="i2s_interface_design__table_h4x_sh3_d1c" 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_i2s_set_bclk_ratio</span></caption><colgroup><col style="width:50%"/><col style="width:50%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_h4x_sh3_d1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_h4x_sh3_d1c__entry__2">static int aic_i2s_set_bclk_ratio(struct snd_soc_dai *dai,
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unsigned int ratio)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_h4x_sh3_d1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_h4x_sh3_d1c__entry__2">设置 S 模块 LRCK 与 BCLK 时钟频率的比率</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_h4x_sh3_d1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_h4x_sh3_d1c__entry__2">dai：指向 dai 的指针 | ratio：需要设置的比率</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_h4x_sh3_d1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_h4x_sh3_d1c__entry__2">0：执行成功 | -EINVAL：参数非法</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_h4x_sh3_d1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_h4x_sh3_d1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_i4x_sh3_d1c" data-ofbid="i2s_interface_design__table_i4x_sh3_d1c" 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_i2s_set_fmt</span></caption><colgroup><col style="width:50%"/><col style="width:50%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_i4x_sh3_d1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_i4x_sh3_d1c__entry__2">static int aic_i2s_set_fmt(struct snd_soc_dai *dai, unsigned int
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fmt)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_i4x_sh3_d1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_i4x_sh3_d1c__entry__2">设置 S 模块的格式</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_i4x_sh3_d1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_i4x_sh3_d1c__entry__2">dai：指向 dai 的指针 | fmt：需要设置的格式</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_i4x_sh3_d1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_i4x_sh3_d1c__entry__2">0：执行成功 | -EINVAL：参数非法</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_i4x_sh3_d1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_i4x_sh3_d1c__entry__2">通过该函数可以设置的格式有： | 1. I2S 的主从模式 | 2. BCLK 和 LRCK 的极性 | 3.
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I2S 的数据格式</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_j4x_sh3_d1c" data-ofbid="i2s_interface_design__table_j4x_sh3_d1c" 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_i2s_set_tdm_slot</span></caption><colgroup><col style="width:50%"/><col style="width:50%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_j4x_sh3_d1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_j4x_sh3_d1c__entry__2">static int aic_i2s_set_tdm_slot(struct snd_soc_dai *dai,unsigned
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int tx_mask, unsigned int rx_mask,int slots, int slot_width)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_j4x_sh3_d1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_j4x_sh3_d1c__entry__2">设置 S 模块 TDM 模式下的通道个数和宽度</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_j4x_sh3_d1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_j4x_sh3_d1c__entry__2">dai：指向 dai 的指针 | tx_mask：tx slot 的 mask | rx_mask：rx slot 的 mask |
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slots：设置的通道个数 | slot_width：设置的通道宽度</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_j4x_sh3_d1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_j4x_sh3_d1c__entry__2">0：执行成功 | -EINVAL：参数非法</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_j4x_sh3_d1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_j4x_sh3_d1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_k4x_sh3_d1c" data-ofbid="i2s_interface_design__table_k4x_sh3_d1c" 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"> 5</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">aic_i2s_hw_params</span></caption><colgroup><col style="width:50%"/><col style="width:50%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_k4x_sh3_d1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_k4x_sh3_d1c__entry__2">static int aic_i2s_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_k4x_sh3_d1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_k4x_sh3_d1c__entry__2">设置 S 模块硬件参数</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_k4x_sh3_d1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_k4x_sh3_d1c__entry__2">substream：指向 playback 或 capture 的 substream | params：指向硬件参数指针 |
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dai：指向 dai 的指针</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_k4x_sh3_d1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_k4x_sh3_d1c__entry__2">0：执行成功 | -EINVAL：参数非法</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_k4x_sh3_d1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_k4x_sh3_d1c__entry__2">通过该函数，可以设置采样精度，帧率，以及时钟等参数</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_l4x_sh3_d1c" data-ofbid="i2s_interface_design__table_l4x_sh3_d1c" 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"> 6</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">aic_i2s_trigger</span></caption><colgroup><col style="width:50%"/><col style="width:50%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_l4x_sh3_d1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_l4x_sh3_d1c__entry__2">static int aic_i2s_trigger(struct snd_pcm_substream *substream,
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int cmd, struct snd_soc_dai *dai)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_l4x_sh3_d1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_l4x_sh3_d1c__entry__2">I2S 的触发函数</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_l4x_sh3_d1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_l4x_sh3_d1c__entry__2">substream：指向 playback 或 capture 的 substream | cmd：触发的命令 |
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dai：指向 dai 的指针</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_l4x_sh3_d1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_l4x_sh3_d1c__entry__2">0：执行成功 | -EINVAL：参数非法</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_l4x_sh3_d1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_l4x_sh3_d1c__entry__2">通过该函数，可以开始或停止音频的播放或录音</td></tr></tbody></table></div><section class="- topic/section section" id="i2s_interface_design__section_sf5_vkj_g1c" data-ofbid="i2s_interface_design__section_sf5_vkj_g1c"><h2 class="- topic/title title sectiontitle"><strong class="+ topic/ph hi-d/b ph b">driver 层接口设计</strong></h2>
|
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|
||
driver 层可以同时实现 playback 和 record 两个功能，主要根据的是音频数据流的方向进行判别。<div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_avc_xkj_g1c" data-ofbid="i2s_interface_design__table_avc_xkj_g1c" 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"> 7</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">drv_i2s_sound_init</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_avc_xkj_g1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_avc_xkj_g1c__entry__2">rt_err_t drv_i2s_sound_init(struct rt_audio_device
|
||
*audio)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_avc_xkj_g1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_avc_xkj_g1c__entry__2">i2s 的初始化函数</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_avc_xkj_g1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_avc_xkj_g1c__entry__2">audio：指向音频设备的指针</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_avc_xkj_g1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_avc_xkj_g1c__entry__2">RT_EOK：执行成功</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_avc_xkj_g1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_avc_xkj_g1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_bvc_xkj_g1c" data-ofbid="i2s_interface_design__table_bvc_xkj_g1c" 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"> 8</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">drv_i2s_sound_buffer_info</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_bvc_xkj_g1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_bvc_xkj_g1c__entry__2">void drv_i2s_sound_buffer_info(struct rt_audio_device *audio,
|
||
struct rt_audio_buf_info *info)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_bvc_xkj_g1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_bvc_xkj_g1c__entry__2">获取音频的 buffer 参数</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_bvc_xkj_g1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_bvc_xkj_g1c__entry__2">audio：指向音频设备的指针 <p class="- topic/p p" data-ofbid="d32110e282__20250121171515">info：用于获取 buffer 参数的指针</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_bvc_xkj_g1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_bvc_xkj_g1c__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_bvc_xkj_g1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_bvc_xkj_g1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_cvc_xkj_g1c" data-ofbid="i2s_interface_design__table_cvc_xkj_g1c" 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"> 9</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">drv_i2s_sound_start</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_cvc_xkj_g1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_cvc_xkj_g1c__entry__2">rt_err_t drv_i2s_sound_start(struct rt_audio_device *audio,
|
||
int stream)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_cvc_xkj_g1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_cvc_xkj_g1c__entry__2">开始音频播放</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_cvc_xkj_g1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_cvc_xkj_g1c__entry__2">audio：指向音频设备的指针。<p class="- topic/p p" data-ofbid="d32110e317__20250121171515">stream：音频数据流方向</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_cvc_xkj_g1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_cvc_xkj_g1c__entry__2">RT_EOK：执行成功。<p class="- topic/p p" data-ofbid="d32110e324__20250121171515">RT_EINVAL：参数非法</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_cvc_xkj_g1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_cvc_xkj_g1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_dvc_xkj_g1c" data-ofbid="i2s_interface_design__table_dvc_xkj_g1c" 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"> 10</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">drv_i2s_sound_stop</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_dvc_xkj_g1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_dvc_xkj_g1c__entry__2">rt_err_t drv_i2s_sound_stop(struct rt_audio_device *audio,
|
||
int stream)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_dvc_xkj_g1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_dvc_xkj_g1c__entry__2">结束音频播放</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_dvc_xkj_g1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_dvc_xkj_g1c__entry__2">audio：指向音频设备的指针。<p class="- topic/p p" data-ofbid="d32110e354__20250121171515">stream：音频数据流方向</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_dvc_xkj_g1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_dvc_xkj_g1c__entry__2">RT_EOK：执行成功。<p class="- topic/p p" data-ofbid="d32110e361__20250121171515">-RT_EINVAL：参数非法</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_dvc_xkj_g1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_dvc_xkj_g1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_evc_xkj_g1c" data-ofbid="i2s_interface_design__table_evc_xkj_g1c" 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"> 11</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">drv_i2s_sound_pause</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_evc_xkj_g1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_evc_xkj_g1c__entry__2">rt_err_t drv_i2s_sound_pause(struct rt_audio_device *audio,
|
||
int enable)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_evc_xkj_g1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_evc_xkj_g1c__entry__2">暂停/恢复音频播放</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_evc_xkj_g1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_evc_xkj_g1c__entry__2">audio：指向音频设备的指针。<p class="- topic/p p" data-ofbid="d32110e391__20250121171515">enable：音频暂停和恢复播放使能位(0 为恢复，非 0
|
||
为暂停)</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_evc_xkj_g1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_evc_xkj_g1c__entry__2">RT_EOK：执行成功</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_evc_xkj_g1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_evc_xkj_g1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_fvc_xkj_g1c" data-ofbid="i2s_interface_design__table_fvc_xkj_g1c" 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"> 12</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">drv_i2s_sound_configure</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_fvc_xkj_g1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_fvc_xkj_g1c__entry__2">rt_err_t drv_i2s_sound_configure(struct rt_audio_device
|
||
*audio, struct rt_audio_caps *caps)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_fvc_xkj_g1c__entry__1">功能原型</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_fvc_xkj_g1c__entry__2">音频设备配置接口，用于配置采样格式，采样率，通道数等接口</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_fvc_xkj_g1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_fvc_xkj_g1c__entry__2">audio：指向音频设备的指针<p class="- topic/p p" data-ofbid="d32110e426__20250121171515">caps：指向配置参数的指针</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_fvc_xkj_g1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_fvc_xkj_g1c__entry__2">RT_EOK：执行成功<p class="- topic/p p" data-ofbid="d32110e433__20250121171515">-RT_ERROR：参数不支持</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_fvc_xkj_g1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_fvc_xkj_g1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_gvc_xkj_g1c" data-ofbid="i2s_interface_design__table_gvc_xkj_g1c" 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"> 13</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">drv_i2s_sound_getcaps</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_gvc_xkj_g1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_gvc_xkj_g1c__entry__2">rt_err_t drv_i2s_sound_getcaps(struct rt_audio_device *audio,
|
||
struct rt_audio_caps *caps)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_gvc_xkj_g1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_gvc_xkj_g1c__entry__2">获取音频设备的参数</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_gvc_xkj_g1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_gvc_xkj_g1c__entry__2">audio：指向音频设备的指针 <p class="- topic/p p" data-ofbid="d32110e463__20250121171515">caps：指向配置参数的指针</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_gvc_xkj_g1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_gvc_xkj_g1c__entry__2">RT_EOK：执行成功。<p class="- topic/p p" data-ofbid="d32110e470__20250121171515">-RT_ERROR：参数不支持</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_gvc_xkj_g1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_gvc_xkj_g1c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_hvc_xkj_g1c" data-ofbid="i2s_interface_design__table_hvc_xkj_g1c" 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"> 14</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">drv_audio_get_i2s_sound_avail</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_hvc_xkj_g1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_hvc_xkj_g1c__entry__2">rt_size_t drv_i2s_sound_get_playback_avail(struct
|
||
rt_audio_device *audio)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_hvc_xkj_g1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_hvc_xkj_g1c__entry__2">获取音频缓存的数据大小</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_hvc_xkj_g1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_hvc_xkj_g1c__entry__2">audio：指向音频设备的指针</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_hvc_xkj_g1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_hvc_xkj_g1c__entry__2">缓存数据的大小</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_hvc_xkj_g1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_hvc_xkj_g1c__entry__2">-</td></tr></tbody></table></div>
|
||
</section><section class="- topic/section section" id="i2s_interface_design__section_tcm_ykj_g1c" data-ofbid="i2s_interface_design__section_tcm_ykj_g1c"><h2 class="- topic/title title sectiontitle">hal 层接口设计</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d32110e516__20250121171515">hal 层接口也是分 playback，record 两部分进行设计，下面以 playback 端的接口进行说明。</p>
|
||
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_jvc_xkj_g1c" data-ofbid="i2s_interface_design__table_jvc_xkj_g1c" 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"> 15</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">hal_i2s_protocol_select</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_jvc_xkj_g1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_jvc_xkj_g1c__entry__2">int hal_i2s_protocol_select(aic_i2s_ctrl *i2s, i2s_protocol_t
|
||
protocol)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_jvc_xkj_g1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_jvc_xkj_g1c__entry__2">设置传输协议</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_jvc_xkj_g1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_jvc_xkj_g1c__entry__2">i2s：指向 ctrl 的指针 <p class="- topic/p p" data-ofbid="d32110e542__20250121171515">protocol：传输协议</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_jvc_xkj_g1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_jvc_xkj_g1c__entry__2">0：执行成功。<p class="- topic/p p" data-ofbid="d32110e549__20250121171515">-EINVAL：参数不支持</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_jvc_xkj_g1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_jvc_xkj_g1c__entry__2">-</td></tr></tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_kvc_xkj_g1c" data-ofbid="i2s_interface_design__table_kvc_xkj_g1c" 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"> 16</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">hal_i2s_sample_width_select</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_kvc_xkj_g1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_kvc_xkj_g1c__entry__2">int hal_i2s_sample_width_select(aic_i2s_ctrl *i2s,
|
||
i2s_sample_width_t width)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_kvc_xkj_g1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_kvc_xkj_g1c__entry__2">设置采样通道的位宽</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_kvc_xkj_g1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_kvc_xkj_g1c__entry__2">i2s：指向 ctrl 的指针<p class="- topic/p p" data-ofbid="d32110e580__20250121171515">width：通道的位宽</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_kvc_xkj_g1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_kvc_xkj_g1c__entry__2">0：执行成功</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_kvc_xkj_g1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_kvc_xkj_g1c__entry__2">-</td></tr></tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_lvc_xkj_g1c" data-ofbid="i2s_interface_design__table_lvc_xkj_g1c" 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"> 17</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">hal_i2s_mclk_set</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_lvc_xkj_g1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_lvc_xkj_g1c__entry__2">int hal_i2s_mclk_set(aic_i2s_ctrl *i2s, i2s_sample_rate_t
|
||
sample_rate, uint32_t mclk_nfs)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_lvc_xkj_g1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_lvc_xkj_g1c__entry__2">设置 MCLK 的时钟频率</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_lvc_xkj_g1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_lvc_xkj_g1c__entry__2">i2s：指向 ctrl 的指针<p class="- topic/p p" data-ofbid="d32110e616__20250121171515">sample_rate：采样率</p><p class="- topic/p p" data-ofbid="d32110e618__20250121171515">mclk_nfs：MCLK 的时钟频率</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_lvc_xkj_g1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_lvc_xkj_g1c__entry__2">0：执行成功<p class="- topic/p p" data-ofbid="d32110e625__20250121171515">-EINVAL：参数不支持</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_lvc_xkj_g1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_lvc_xkj_g1c__entry__2">-</td></tr></tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_mvc_xkj_g1c" data-ofbid="i2s_interface_design__table_mvc_xkj_g1c" 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"> 18</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">hal_i2s_polarity_set</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_mvc_xkj_g1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_mvc_xkj_g1c__entry__2">void hal_i2s_polarity_set(aic_i2s_ctrl *i2s, i2s_polarity_t
|
||
polarity)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_mvc_xkj_g1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_mvc_xkj_g1c__entry__2">选择 LRCK 的左右通道极性</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_mvc_xkj_g1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_mvc_xkj_g1c__entry__2">i2s：指向 ctrl 的指针<p class="- topic/p p" data-ofbid="d32110e657__20250121171515">polarity：LRCK 的左右通道极性</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_mvc_xkj_g1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_mvc_xkj_g1c__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_mvc_xkj_g1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_mvc_xkj_g1c__entry__2">-</td></tr></tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_nvc_xkj_g1c" data-ofbid="i2s_interface_design__table_nvc_xkj_g1c" 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"> 19</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">hal_i2s_sclk_set</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_nvc_xkj_g1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_nvc_xkj_g1c__entry__2">int hal_i2s_sclk_set(aic_i2s_ctrl *i2s, i2s_sample_rate_t
|
||
sample_rate, uint32_t sclk_nfs)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_nvc_xkj_g1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_nvc_xkj_g1c__entry__2">设置 SCLK/LRCK 的比率</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_nvc_xkj_g1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_nvc_xkj_g1c__entry__2">i2s：指向 ctrl 的指针<p class="- topic/p p" data-ofbid="d32110e693__20250121171515">sample_rate：采样率</p><p class="- topic/p p" data-ofbid="d32110e695__20250121171515">sclk_nfs：需要设置的比率</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_nvc_xkj_g1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_nvc_xkj_g1c__entry__2">0：执行成功<p class="- topic/p p" data-ofbid="d32110e702__20250121171515">-EINVAL：参数不支持</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_nvc_xkj_g1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_nvc_xkj_g1c__entry__2">-</td></tr></tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_ovc_xkj_g1c" data-ofbid="i2s_interface_design__table_ovc_xkj_g1c" 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"> 20</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">hal_i2s_channel_select</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_ovc_xkj_g1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_ovc_xkj_g1c__entry__2">void hal_i2s_channel_select(aic_i2s_ctrl *i2s,
|
||
i2s_sound_channel_t channel, i2s_stream_t stream)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_ovc_xkj_g1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_ovc_xkj_g1c__entry__2">I2S 通道数量设置</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_ovc_xkj_g1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_ovc_xkj_g1c__entry__2">i2s：指向 ctrl 的指针<p class="- topic/p p" data-ofbid="d32110e733__20250121171515">channel：指向 t 的变量，表示要使用的通道</p><p class="- topic/p p" data-ofbid="d32110e735__20250121171515">stream：音频数据流的方向</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_ovc_xkj_g1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_ovc_xkj_g1c__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_ovc_xkj_g1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_ovc_xkj_g1c__entry__2">-</td></tr></tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_pvc_xkj_g1c" data-ofbid="i2s_interface_design__table_pvc_xkj_g1c" 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"> 21</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">hal_i2s_playback_start</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_pvc_xkj_g1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_pvc_xkj_g1c__entry__2">void hal_i2s_playback_start(aic_i2s_ctrl *i2s, i2s_format_t
|
||
*format)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_pvc_xkj_g1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_pvc_xkj_g1c__entry__2">开始播放</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_pvc_xkj_g1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_pvc_xkj_g1c__entry__2">i2s：指向 ctrl 的指针<p class="- topic/p p" data-ofbid="d32110e771__20250121171515">format：指向 t 的指针</p></td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_pvc_xkj_g1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_pvc_xkj_g1c__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_pvc_xkj_g1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_pvc_xkj_g1c__entry__2">-</td></tr></tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="i2s_interface_design__table_qvc_xkj_g1c" data-ofbid="i2s_interface_design__table_qvc_xkj_g1c" 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"> 22</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">hal_i2s_playback_stop</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead"><tr class="- topic/row"><th class="- topic/entry entry colsep-1 rowsep-1" id="i2s_interface_design__table_qvc_xkj_g1c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2s_interface_design__table_qvc_xkj_g1c__entry__2">void hal_i2s_playback_stop(aic_i2s_ctrl *i2s)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_qvc_xkj_g1c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_qvc_xkj_g1c__entry__2">停止播放</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_qvc_xkj_g1c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_qvc_xkj_g1c__entry__2">i2s：指向 ctrl 的指针</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2s_interface_design__table_qvc_xkj_g1c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2s_interface_design__table_qvc_xkj_g1c__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2s_interface_design__table_qvc_xkj_g1c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2s_interface_design__table_qvc_xkj_g1c__entry__2">-</td></tr></tbody></table></div>
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