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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/i2c/i2c_interface.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">接口设计</h1><div class="date inPage">3 Apr 2024</div><div style="color: gray;">
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Read time: 2 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="i2c_interface_design__table_j4t_y5r_21c" data-ofbid="i2c_interface_design__table_j4t_y5r_21c" 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">i2c_handle_tx_abort</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="i2c_interface_design__table_j4t_y5r_21c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2c_interface_design__table_j4t_y5r_21c__entry__2">int i2c_handle_tx_abort(struct aic_i2c_dev *i2c_dev)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_j4t_y5r_21c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_j4t_y5r_21c__entry__2">打印 c 发生 abort 的原因，并返回相应的 error 值</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_j4t_y5r_21c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_j4t_y5r_21c__entry__2">i2c_dev：指向自定义的 dev 结构体</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_j4t_y5r_21c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_j4t_y5r_21c__entry__2">根据不同的 abort 原因，返回不同的 error 值</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2c_interface_design__table_j4t_y5r_21c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2c_interface_design__table_j4t_y5r_21c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2c_interface_design__table_k4t_y5r_21c" data-ofbid="i2c_interface_design__table_k4t_y5r_21c" 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">i2c_scl_cnt</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="i2c_interface_design__table_k4t_y5r_21c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2c_interface_design__table_k4t_y5r_21c__entry__2">int i2c_scl_cnt(u32 ic_clk, enum aic_i2c_speed aic_speed, u16
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*hcnt, u16 *lcnt)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_k4t_y5r_21c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_k4t_y5r_21c__entry__2">根据 c 模块工作的时钟频率和 i2c 的传输速率，返回需要设置的 hcnt 值和 lcnt 值</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_k4t_y5r_21c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_k4t_y5r_21c__entry__2">ic_clk：i2c 模块工作的时钟频率，以 KHz 为单位 speed：表示 c 的传输速率，是标准模式还是快速模式 hcnt：指向需要设置的 hcnt 值的指针 lcnt：指向需要设置的 lcnt 值的指针</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_k4t_y5r_21c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_k4t_y5r_21c__entry__2">0：函数执行成功-EINVAL：hcnt 或 lcnt 为空指针</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2c_interface_design__table_k4t_y5r_21c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2c_interface_design__table_k4t_y5r_21c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2c_interface_design__table_l4t_y5r_21c" data-ofbid="i2c_interface_design__table_l4t_y5r_21c" 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">i2c_set_timmings_master</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="i2c_interface_design__table_l4t_y5r_21c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2c_interface_design__table_l4t_y5r_21c__entry__2">static int i2c_set_timmings_master(struct aic_i2c_dev
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*i2c_dev)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_l4t_y5r_21c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_l4t_y5r_21c__entry__2">设置 master 产生 SCL 时钟的时序参数</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_l4t_y5r_21c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_l4t_y5r_21c__entry__2">i2c_dev：指向自定义的 dev 结构体</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_l4t_y5r_21c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_l4t_y5r_21c__entry__2">0：函数执行成功-EINVAL：参数非法</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2c_interface_design__table_l4t_y5r_21c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2c_interface_design__table_l4t_y5r_21c__entry__2">若在 DTS 中有设置 i2c 的时序参数 ns 或 ns，则会由 timings 对 DTS 进行解析，在此函数中不再调用 cnt 进行设置</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2c_interface_design__table_m4t_y5r_21c" data-ofbid="i2c_interface_design__table_m4t_y5r_21c" 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">i2c_init_master</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="i2c_interface_design__table_m4t_y5r_21c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2c_interface_design__table_m4t_y5r_21c__entry__2">static void i2c_init_master(struct aic_i2c_dev *i2c_dev)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_m4t_y5r_21c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_m4t_y5r_21c__entry__2">初始化 master 模式下的参数设置，写入 hcnt 和 lcnt，配置 TXFIFO 和 RXFIFO 阈值，将 c 配置为主模式</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_m4t_y5r_21c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_m4t_y5r_21c__entry__2">i2c_dev：指向自定义的 dev 结构体</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_m4t_y5r_21c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_m4t_y5r_21c__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2c_interface_design__table_m4t_y5r_21c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2c_interface_design__table_m4t_y5r_21c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2c_interface_design__table_n4t_y5r_21c" data-ofbid="i2c_interface_design__table_n4t_y5r_21c" 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">i2c_xfer_msg_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="i2c_interface_design__table_n4t_y5r_21c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2c_interface_design__table_n4t_y5r_21c__entry__2">static void i2c_xfer_msg_init(struct aic_i2c_dev
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*i2c_dev)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_n4t_y5r_21c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_n4t_y5r_21c__entry__2">在传输每个 msg 前进行的初始化，主要是将指示每个 msg 状态的变量设置为初始值，并设置传输的从地址设置，使能中断</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_n4t_y5r_21c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_n4t_y5r_21c__entry__2">i2c_dev：指向自定义的 dev 结构体</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_n4t_y5r_21c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_n4t_y5r_21c__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2c_interface_design__table_n4t_y5r_21c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2c_interface_design__table_n4t_y5r_21c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2c_interface_design__table_o4t_y5r_21c" data-ofbid="i2c_interface_design__table_o4t_y5r_21c" 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">i2c_xfer_msg</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="i2c_interface_design__table_o4t_y5r_21c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2c_interface_design__table_o4t_y5r_21c__entry__2">static int i2c_xfer_msg(struct aic_i2c_dev *i2c_dev, struct
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i2c_msg *msg, bool is_first, bool is_last)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_o4t_y5r_21c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_o4t_y5r_21c__entry__2">单个 msg 的传输函数，若当前 msg 是第一个 msg，则会等待总线空闲，然后执行 init 进行 msg 传输前的初始化工作，等待当前 msg 传输完成</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_o4t_y5r_21c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_o4t_y5r_21c__entry__2">i2c_dev：指向自定义的 dev 结构体 msg：指向当前将要传输的 first：指示当前 msg 是否是第一个 last：指示当前 msg 是否是最后一个 msg</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_o4t_y5r_21c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_o4t_y5r_21c__entry__2">0：执行成功<0：执行过程中发生错误</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2c_interface_design__table_o4t_y5r_21c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2c_interface_design__table_o4t_y5r_21c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2c_interface_design__table_p4t_y5r_21c" data-ofbid="i2c_interface_design__table_p4t_y5r_21c" 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">i2c_xfer</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="i2c_interface_design__table_p4t_y5r_21c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2c_interface_design__table_p4t_y5r_21c__entry__2">static int i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg
|
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msgs[], int num)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_p4t_y5r_21c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_p4t_y5r_21c__entry__2">i2c 的传输函数，该函数可完成多个 msg 的传输，使用该函数完成对 algorithm 中 master_xfer 函数指针的填充</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_p4t_y5r_21c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_p4t_y5r_21c__entry__2">i2c_dev：指向自定义的 dev 结构体 msgs：指向 msg 数组的指针 num：需要传输的 msg 个数</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_p4t_y5r_21c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_p4t_y5r_21c__entry__2">0：执行成功<0：执行过程中发生错误</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2c_interface_design__table_p4t_y5r_21c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2c_interface_design__table_p4t_y5r_21c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2c_interface_design__table_q4t_y5r_21c" data-ofbid="i2c_interface_design__table_q4t_y5r_21c" 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">i2c_handle_read</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="i2c_interface_design__table_q4t_y5r_21c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2c_interface_design__table_q4t_y5r_21c__entry__2">static void i2c_handle_read(struct aic_i2c_dev *i2c_dev)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_q4t_y5r_21c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_q4t_y5r_21c__entry__2">当触发 FULL 中断时，调用该函数读取接收到的数据，若完成当前 msg 的接收，则释放完成量。该函数在中断中调用</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_q4t_y5r_21c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_q4t_y5r_21c__entry__2">i2c_dev：指向自定义的 dev 结构体</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_q4t_y5r_21c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_q4t_y5r_21c__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2c_interface_design__table_q4t_y5r_21c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2c_interface_design__table_q4t_y5r_21c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2c_interface_design__table_r4t_y5r_21c" data-ofbid="i2c_interface_design__table_r4t_y5r_21c" 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">i2c_handle_write</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="i2c_interface_design__table_r4t_y5r_21c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2c_interface_design__table_r4t_y5r_21c__entry__2">static void i2c_handle_write(struct aic_i2c_dev *i2c_dev)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_r4t_y5r_21c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_r4t_y5r_21c__entry__2">当触发 EMPTY 中断时，调用该函数。若是读 msg，则调用该函数发送读命令，若是写 msg，则调用该函数发送数据</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_r4t_y5r_21c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_r4t_y5r_21c__entry__2">i2c_dev：指向自定义的 dev 结构体</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_r4t_y5r_21c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_r4t_y5r_21c__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2c_interface_design__table_r4t_y5r_21c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2c_interface_design__table_r4t_y5r_21c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2c_interface_design__table_s4t_y5r_21c" data-ofbid="i2c_interface_design__table_s4t_y5r_21c" 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">i2c_init_slave</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="i2c_interface_design__table_s4t_y5r_21c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2c_interface_design__table_s4t_y5r_21c__entry__2">static void i2c_init_slave(struct aic_i2c_dev *i2c_dev)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_s4t_y5r_21c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_s4t_y5r_21c__entry__2">初始化 slave 模式下的参数设置，配置 TXFIFO 和 RXFIFO 阈值，设置 c 为 slave 模式</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_s4t_y5r_21c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_s4t_y5r_21c__entry__2">i2c_dev：指向自定义的 dev 结构体</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_s4t_y5r_21c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_s4t_y5r_21c__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2c_interface_design__table_s4t_y5r_21c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2c_interface_design__table_s4t_y5r_21c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2c_interface_design__table_t4t_y5r_21c" data-ofbid="i2c_interface_design__table_t4t_y5r_21c" 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">i2c_reg_slave</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="i2c_interface_design__table_t4t_y5r_21c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2c_interface_design__table_t4t_y5r_21c__entry__2">static int i2c_reg_slave(struct i2c_client *slave)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_t4t_y5r_21c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_t4t_y5r_21c__entry__2">初始化 slave 模式下的参数设置，配置 slave 是 10bit 寻址还是 7bit 寻址，设置从机的地址</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_t4t_y5r_21c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_t4t_y5r_21c__entry__2">i2c_dev：指向自定义的 dev 结构体</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_t4t_y5r_21c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_t4t_y5r_21c__entry__2">0：执行成功-EBUSY：忙等待</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2c_interface_design__table_t4t_y5r_21c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2c_interface_design__table_t4t_y5r_21c__entry__2">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="i2c_interface_design__table_u4t_y5r_21c" data-ofbid="i2c_interface_design__table_u4t_y5r_21c" 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">i2c_unreg_slave</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="i2c_interface_design__table_u4t_y5r_21c__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="i2c_interface_design__table_u4t_y5r_21c__entry__2">static int i2c_unreg_slave(struct i2c_client *slave)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_u4t_y5r_21c__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_u4t_y5r_21c__entry__2">与 slave 功能相反</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_u4t_y5r_21c__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_u4t_y5r_21c__entry__2">i2c_dev：指向自定义的 dev 结构体</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="i2c_interface_design__table_u4t_y5r_21c__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="i2c_interface_design__table_u4t_y5r_21c__entry__2">0：执行成功</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="i2c_interface_design__table_u4t_y5r_21c__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="i2c_interface_design__table_u4t_y5r_21c__entry__2">-</td></tr></tbody></table></div></div></article></main></div>
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