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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/spi/spi_interface.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">接口设计</h1><div class="date inPage">24 Jan 2024</div><div style="color: gray;">
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Read time: 1 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="spi_interface_design__table_npv_ywy_21c" data-ofbid="spi_interface_design__table_npv_ywy_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">aic_spi_setup</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">函数原型</td><td class="- topic/entry entry colsep-0 rowsep-1">int aic_spi_setup(struct spi_device *spi)</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1">SPI 设备的传输位宽、模式的检查和配置</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1">struct spi_device *spiSPI 设备指针</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1">0: 成功其他: 失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="spi_interface_design__table_opv_ywy_21c" data-ofbid="spi_interface_design__table_opv_ywy_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">aic_spi_set_cs</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">函数原型</td><td class="- topic/entry entry colsep-0 rowsep-1">void aic_spi_set_cs(struct spi_device *spi, bool cs_high)</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1">设置 SPI 设备的片选信号</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1">struct spi_device *spiSPI 设备指针 high 是否选择该设备</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="spi_interface_design__table_ppv_ywy_21c" data-ofbid="spi_interface_design__table_ppv_ywy_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">aic_spi_max_transfer_size</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">函数原型</td><td class="- topic/entry entry colsep-0 rowsep-1">size_t aic_spi_max_transfer_size(struct spi_device *spi)</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1">SPI CORE 获取当前 SPI 控制器单次最大可传输的数据长度</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1">struct spi_device *spiSPI 设备指针</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1">单次可传输的数据长度</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0">-</td></tr></tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="spi_interface_design__table_qpv_ywy_21c" data-ofbid="spi_interface_design__table_qpv_ywy_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">aic_spi_transfer_one</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">函数原型</td><td class="- topic/entry entry colsep-0 rowsep-1">int aic_spi_transfer_one(struct spi_controller *ctlr,struct
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spi_device *spi, struct spi_transfer *t)</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1">执行一次传输</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1">struct spi_controller *ctlrSPI 控制器指针 struct spi_device *spiSPI
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设备指针 struct spi_transfer *t 单次 SPI 传输结构体指针</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1">0: 成功其他: 失败</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0">-</td></tr></tbody></table></div></div></article></main></div>
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