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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" role="article" aria-labelledby="ariaid-title1">
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<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://aicdocco/taskstopics/sdk/spienc/enc_design_introduction.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">设计说明</h1>
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<div class="date inPage">16 May 2025</div><div style="color: gray;">
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2025-01-23 16:37:00 +08:00
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Read time: 4 minute(s)
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2025-04-23 17:54:31 +08:00
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</div>
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<div class="- topic/body body">
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<section class="- topic/section section" id="id__id2" data-ofbid="id__id2"><h2 class="- topic/title title sectiontitle">源码说明</h2>
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2025-04-23 17:54:31 +08:00
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<ul class="- topic/ul ul simple" id="id__ul_lmt_rc3_bdc" data-ofbid="id__ul_lmt_rc3_bdc">
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<li class="- topic/li li" data-ofbid="d113904e35__20250519091517">
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<p class="- topic/p p" data-ofbid="d113904e37__20250519091517">bsp/artinchip/drv/spienc/drv_spienc.c，SPIENC Driver 层实现</p>
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2025-04-23 17:54:31 +08:00
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</li>
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2025-07-22 11:15:46 +08:00
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<li class="- topic/li li" data-ofbid="d113904e41__20250519091517">
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<p class="- topic/p p" data-ofbid="d113904e43__20250519091517">bsp/artinchip/hal/spienc/hal_spienc.c，SPIENC HAL 层实现</p>
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</li>
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2025-07-22 11:15:46 +08:00
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<li class="- topic/li li" data-ofbid="d113904e47__20250519091517">
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<p class="- topic/p p" data-ofbid="d113904e49__20250519091517">bsp/artinchip/include/hal/hal_spienc.h，SPIENC HAL 层接口头文件</p>
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</section>
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<section class="- topic/section section" id="id__id3" data-ofbid="id__id3"><h2 class="- topic/title title sectiontitle">模块架构</h2>
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2025-07-22 11:15:46 +08:00
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<p class="- topic/p p" data-ofbid="d113904e60__20250519091517">SPIENC 驱动 Driver 层采用直接调用 HAL 层的接口，如果只使用 HAL 层也可以支持 baremetal 方式的应用场景。</p>
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<figure class="- topic/fig fig fignone" id="id__id7" data-ofbid="id__id7">
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<br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_mmt_rc3_bdc" src="../../../images/memory/sw_system9.png" alt="sw_system9"/></div><br/>
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<figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 1</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">SPIENC 驱动的软件架构图</span></figcaption></figure>
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<p class="- topic/p p" data-ofbid="d113904e75__20250519091517">文件系统或者应用程序通过 MTD 层访问 SPI NOR / SPI NAND 设备的数据，SPI NOR / SPI NAND 驱动通过 SPI 总线传输数据。</p>
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<p class="- topic/p p" data-ofbid="d113904e78__20250519091517">在 SPI NOR / SPI NAND 驱动通过 SPI 总线访问相关数据时，其实需要发送一系列的命令来进行数据的读写。 这个过程中，命令通信的数据，包括一些读写
|
2025-01-23 16:37:00 +08:00
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SPI NOR / SPI NAND 的寄存器数据都不能加密， 仅存储数据部分需要进行加密处理。因此，虽然 SPI_ENC 是在硬件总线上对数据进行加密，
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但是软件使用时需要在 SPI NOR / SPI NAND 驱动 根据需要，提供必要的加解密信息（数据地址和长度）， 并且启动相应的数据传输加解密。</p>
|
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<p class="- topic/p p" data-ofbid="d113904e82__20250519091517">因此在软件层次上，SPI NOR / SPI NAND 驱动依赖 SPI 驱动以及 SPI_ENC 驱动，而 SPI 驱动与 SPI_ENC 驱动是并列关系。</p>
|
2025-04-23 17:54:31 +08:00
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</section>
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<section class="- topic/section section" id="id__id4" data-ofbid="id__id4"><h2 class="- topic/title title sectiontitle">设计要点</h2>
|
2025-01-23 16:37:00 +08:00
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2025-07-22 11:15:46 +08:00
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<p class="- topic/p p" data-ofbid="d113904e91__20250519091517">在设计实现 SPI_ENC 的驱动时，主要考虑了 SPI_ENC 的本身特点，以及与 SPI NOR / SPI NAND 驱动的结合。</p>
|
2025-01-23 16:37:00 +08:00
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<div class="- topic/note note note note_note" id="id__note_czr_qn3_ddc" data-ofbid="id__note_czr_qn3_ddc"><span class="note__title">注：</span>
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<div class="- topic/div div">
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<div class="- topic/div div">由于 SPI_ENC 内部使用 eFuse 所提供的密钥，因此不需要通过外部设置密钥函数来设置密钥。</div>
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</div>
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</div>
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<div class="- topic/div div section" id="id__id5">
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<strong class="+ topic/ph hi-d/b ph b">数据读写时启用</strong>
|
2025-07-22 11:15:46 +08:00
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<p class="- topic/p p" data-ofbid="d113904e108__20250519091517">SPI NAND / SPI NOR 驱动通过发送命令的方式与 SPI NAND / SPI NOR 器件进行交互，从而实现数据的读写。 在使能 SPI_ENC
|
2025-04-23 17:54:31 +08:00
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|
之后，SPI NAND / SPI NOR 驱动需要进行区分：</p><ul class="- topic/ul ul simple" id="id__ul_omt_rc3_bdc" data-ofbid="id__ul_omt_rc3_bdc">
|
2025-07-22 11:15:46 +08:00
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<li class="- topic/li li" data-ofbid="d113904e112__20250519091517">
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<p class="- topic/p p" data-ofbid="d113904e114__20250519091517">非存储数据的 SPI 传输，不启动 SPI_ENC，按照原有驱动的流程执行</p>
|
2025-04-23 17:54:31 +08:00
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</li>
|
2025-07-22 11:15:46 +08:00
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<li class="- topic/li li" data-ofbid="d113904e118__20250519091517">
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<p class="- topic/p p" data-ofbid="d113904e120__20250519091517">存储数据的 SPI 传输，启动 SPI_ENC 进行加密或者解密</p>
|
2025-04-23 17:54:31 +08:00
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</li>
|
2025-07-22 11:15:46 +08:00
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</ul><p class="- topic/p p" data-ofbid="d113904e124__20250519091517">因此 SPI NAND / SPI NOR 驱动需要做一些改动，在对存储数据进行读写时，启动 SPI_ENC。</p><div class="- topic/p p" data-ofbid="d113904e126__20250519091517">以 SPI NAND 为例：
|
2025-01-23 16:37:00 +08:00
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初始化 spinand
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时，同时进行加密相关的初始化。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_art_xg4_fdc" data-ofbid="id__codeblock_art_xg4_fdc">spinand_flash_init();
|
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|-> drv_spienc_init()</pre></div><div class="- topic/p p" data-ofbid="d113904e130__20250519091517">读操作流程：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_qtc_yg4_fdc" data-ofbid="id__codeblock_qtc_yg4_fdc">spinand_read_page();
|
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|-> SPINAND_FLASH_OPS->read_dataload();
|
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|-> cpos = <span class="hl-number">1</span> + <span class="hl-number">2</span> + (SPINAND_FLASH_DUMMYBYTE * <span class="hl-number">8</span>); <em class="hl-comment">/* cpos = cmd.nbyte + addr.nbyte + dummy.nbyte */</em>
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|-> drv_spienc_set_cfg(<span class="hl-number">0</span>, page * SPINAND_FLASH_PAGE_SIZE, cpos, data_len); <em class="hl-comment">/* 配置本次加密数据信息 */</em>
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|-> drv_spienc_start(); <em class="hl-comment">/* 启动 SPI_ENC */</em>
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|-> SPINAND_FLASH_OPS->read_quadoutput(qspi, <span class="hl-number">0</span>, buf, data_len); <em class="hl-comment">/* 调用标准 SPI API 进行数据传输 */</em>
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|-> drv_spienc_stop(); <em class="hl-comment">/* 停止 SPI_ENC */</em>
|
2025-07-22 11:15:46 +08:00
|
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|
|-> drv_spienc_check_empty() <em class="hl-comment">/* 检查是否为空 page */</em></pre></div><div class="- topic/p p" data-ofbid="d113904e134__20250519091517">写操作流程：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_gqk_yg4_fdc" data-ofbid="id__codeblock_gqk_yg4_fdc">spinand_write_page();
|
2025-01-23 16:37:00 +08:00
|
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|
|-> SPINAND_FLASH_OPS->program_dataload();
|
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|
|-> cpos = <span class="hl-number">1</span> + <span class="hl-number">2</span> + (SPINAND_FLASH_DUMMYBYTE * <span class="hl-number">8</span>); <em class="hl-comment">/* cpos = cmd.nbyte + addr.nbyte + dummy.nbyte */</em>
|
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|
|-> drv_spienc_set_cfg(<span class="hl-number">0</span>, page * SPINAND_FLASH_PAGE_SIZE, cpos, data_len); <em class="hl-comment">/* 配置本次加密数据信息 */</em>
|
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|
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|
|-> drv_spienc_start(); <em class="hl-comment">/* 启动 SPI_ENC */</em>
|
|
|
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|
|-> SPINAND_FLASH_OPS->program_dataload(); <em class="hl-comment">/* 调用标准 SPI API 进行数据传输 */</em>
|
|
|
|
|
|
|-> drv_spienc_stop(); <em class="hl-comment">/* 停止 SPI_ENC */</em>
|
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|
|-> SPINAND_FLASH_OPS->program_execute();</pre></div>
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|
</div>
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|
<div class="- topic/div div section" id="id__id6">
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|
<strong class="+ topic/ph hi-d/b ph b">空数据块的检测</strong>
|
2025-07-22 11:15:46 +08:00
|
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|
<p class="- topic/p p" data-ofbid="d113904e145__20250519091517">SPI NAND / SPI NOR 在执行了擦除之后，存储单元上的数据被认为是空的，值都是 0xFF 。
|
2025-01-23 16:37:00 +08:00
|
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|
但是在使用过程中，读取程序并不一定知道所读取的区域是否是被擦除过，因此在使能了 SPI_ENC 之后， 通过 SPI 读取回来该区域的数据都是被 SPI_ENC
|
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|
解密后的数据。原本是被擦除后的 0xFF ，
|
2025-07-22 11:15:46 +08:00
|
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|
读回来的却是其它数据。</p><p class="- topic/p p" data-ofbid="d113904e147__20250519091517">带来的问题：有些程序，如文件系统，会判断读回来的数据是否都为 0xFF
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，如果是，则认为是未使用的块，做特殊处理。 现在读回来的数据却被改变了，会导致原来的处理逻辑全部失效。 </p><p class="- topic/p p" data-ofbid="d113904e149__20250519091517">为了解决上述问题，SPI_ENC
|
2025-04-23 17:54:31 +08:00
|
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|
提供了一个空块检测功能。如下图所示：</p><ul class="- topic/ul ul simple" id="id__ul_umt_rc3_bdc" data-ofbid="id__ul_umt_rc3_bdc">
|
2025-07-22 11:15:46 +08:00
|
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|
<li class="- topic/li li" data-ofbid="d113904e153__20250519091517">
|
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|
<p class="- topic/p p" data-ofbid="d113904e155__20250519091517">首先按照正常的流程读取一块数据</p>
|
2025-04-23 17:54:31 +08:00
|
|
|
|
</li>
|
2025-07-22 11:15:46 +08:00
|
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|
<li class="- topic/li li" data-ofbid="d113904e159__20250519091517">
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|
<p class="- topic/p p" data-ofbid="d113904e161__20250519091517">传输完成之后，检查 SPI_ENC 的状态，如果提示解密前的所有数据都是 0xFF ，则软件将读取的结果全部置为
|
2025-01-23 16:37:00 +08:00
|
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|
0xFF</p>
|
2025-04-23 17:54:31 +08:00
|
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|
</li>
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|
</ul><figure class="- topic/fig fig fignone" id="id__id8" data-ofbid="id__id8">
|
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|
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|
<br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_vmt_rc3_bdc" src="../../../images/memory/spienc_empty_detect.png" alt="spienc_empty_detect"/></div><br/>
|
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|
<figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 2</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">空块检测</span></figcaption></figure>
|
2025-07-22 11:15:46 +08:00
|
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|
<p class="- topic/p p" data-ofbid="d113904e177__20250519091517">相关的软件操作，在 <span class="+ topic/keyword pr-d/apiname keyword apiname">spinand_read_page()</span> 中读取完数据时进行。</p></div>
|
2025-04-23 17:54:31 +08:00
|
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|
|
</section>
|
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|
<section class="- topic/section section" id="id__driver" data-ofbid="id__driver"><h2 class="- topic/title title sectiontitle">Driver 层接口设计</h2>
|
2025-01-23 16:37:00 +08:00
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|
2025-04-23 17:54:31 +08:00
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|
<div class="table-container"><table class="- topic/table table frame-all" id="id__table_wmt_rc3_bdc" data-ofbid="id__table_wmt_rc3_bdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 1</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">drv_spienc_set_cfg</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead">
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<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
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<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_wmt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e205__20250519091517">函数原型</p></th>
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<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_wmt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e209__20250519091517">void drv_spienc_set_cfg(u32 spi_bus, u32 addr, u32 cpos, u32
|
2025-04-23 17:54:31 +08:00
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|
clen)</p></th>
|
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|
</tr>
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</thead><tbody class="- topic/tbody tbody">
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<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
|
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_wmt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e219__20250519091517">功能说明</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_wmt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e223__20250519091517">配置加密数据信息</p></td>
|
2025-04-23 17:54:31 +08:00
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</tr>
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<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
|
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_wmt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e230__20250519091517">参数定义</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_wmt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e234__20250519091517">
|
2025-01-23 16:37:00 +08:00
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<div class="- topic/div div">
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|
<div class="- topic/div div">spi_bus - 选择需要配置的 QSPI 设备</div>
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<div class="- topic/div div">addr - 本次传输数据的起始地址</div>
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<div class="- topic/div div">cpos - 本次传输密文数据的开始位置</div>
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<div class="- topic/div div">clen - 本次传输密文的数据长度</div>
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</div>
|
2025-04-23 17:54:31 +08:00
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|
</p></td>
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</tr>
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<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_wmt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e256__20250519091517">返回值</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_wmt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e260__20250519091517">无</p></td>
|
2025-04-23 17:54:31 +08:00
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</tr>
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<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_wmt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e267__20250519091517">注意事项</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_wmt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e271__20250519091517">-</p></td>
|
2025-04-23 17:54:31 +08:00
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</tr>
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</tbody></table></div>
|
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|
<div class="table-container"><table class="- topic/table table frame-all" id="id__table_xmt_rc3_bdc" data-ofbid="id__table_xmt_rc3_bdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 2</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">drv_spienc_start</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead">
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<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
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<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_xmt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e294__20250519091517">函数原型</p></th>
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<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_xmt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e298__20250519091517">void drv_spienc_start(void)</p></th>
|
2025-04-23 17:54:31 +08:00
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</tr>
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</thead><tbody class="- topic/tbody tbody">
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<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
|
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_xmt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e308__20250519091517">功能说明</p></td>
|
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_xmt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e312__20250519091517">启动 SPI_ENC</p></td>
|
2025-04-23 17:54:31 +08:00
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</tr>
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<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_xmt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e319__20250519091517">参数定义</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_xmt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e323__20250519091517">无</p></td>
|
2025-04-23 17:54:31 +08:00
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</tr>
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<tr class="- topic/row">
|
2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_xmt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e330__20250519091517">返回值</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_xmt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e334__20250519091517">无</p></td>
|
2025-04-23 17:54:31 +08:00
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</tr>
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<tr class="- topic/row">
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2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_xmt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e341__20250519091517">注意事项</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_xmt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e345__20250519091517">-</p></td>
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</tr>
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</tbody></table></div>
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<div class="table-container"><table class="- topic/table table frame-all" id="id__table_ymt_rc3_bdc" data-ofbid="id__table_ymt_rc3_bdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 3</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">drv_spienc_stop</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead">
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<tr class="- topic/row">
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<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_ymt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e368__20250519091517">函数原型</p></th>
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<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_ymt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e372__20250519091517">void drv_spienc_stop(void)</p></th>
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2025-04-23 17:54:31 +08:00
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</tr>
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</thead><tbody class="- topic/tbody tbody">
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<tr class="- topic/row">
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2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_ymt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e382__20250519091517">功能说明</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_ymt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e386__20250519091517">停止 SPI_ENC</p></td>
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2025-04-23 17:54:31 +08:00
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</tr>
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<tr class="- topic/row">
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2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_ymt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e393__20250519091517">参数定义</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_ymt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e397__20250519091517">无</p></td>
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2025-04-23 17:54:31 +08:00
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</tr>
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<tr class="- topic/row">
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_ymt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e404__20250519091517">返回值</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_ymt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e408__20250519091517">无</p></td>
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2025-04-23 17:54:31 +08:00
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</tr>
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<tr class="- topic/row">
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2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_ymt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e415__20250519091517">注意事项</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_ymt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e419__20250519091517">-</p></td>
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2025-04-23 17:54:31 +08:00
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</tr>
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</tbody></table></div>
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<div class="table-container"><table class="- topic/table table frame-all" id="id__table_zmt_rc3_bdc" data-ofbid="id__table_zmt_rc3_bdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 4</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">drv_spienc_check_empty</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead">
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<tr class="- topic/row">
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<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_zmt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e442__20250519091517">函数原型</p></th>
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<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_zmt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e446__20250519091517">int drv_spienc_check_empty(void)</p></th>
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</tr>
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</thead><tbody class="- topic/tbody tbody">
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<tr class="- topic/row">
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2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_zmt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e456__20250519091517">功能说明</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_zmt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e460__20250519091517">检查本次读取数据是否全为空</p></td>
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2025-04-23 17:54:31 +08:00
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</tr>
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<tr class="- topic/row">
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2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_zmt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e467__20250519091517">参数定义</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_zmt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e471__20250519091517">无</p></td>
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2025-04-23 17:54:31 +08:00
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</tr>
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<tr class="- topic/row">
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2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_zmt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e478__20250519091517">返回值</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_zmt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e482__20250519091517">0，本次传输数据不全为空；1，本次传输数据全为空</p></td>
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2025-04-23 17:54:31 +08:00
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</tr>
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<tr class="- topic/row">
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2025-07-22 11:15:46 +08:00
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<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_zmt_rc3_bdc__entry__1"><p class="- topic/p p" data-ofbid="d113904e489__20250519091517">注意事项</p></td>
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<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_zmt_rc3_bdc__entry__2"><p class="- topic/p p" data-ofbid="d113904e493__20250519091517">-</p></td>
|
2025-04-23 17:54:31 +08:00
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</tr>
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</tbody></table></div>
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</section>
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<section class="- topic/section section" id="id__hal" data-ofbid="id__hal"><h2 class="- topic/title title sectiontitle">HAL 层接口设计</h2>
|
2025-01-23 16:37:00 +08:00
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2025-07-22 11:15:46 +08:00
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<div class="- topic/p p" data-ofbid="d113904e506__20250519091517">HAL 层的函数接口声明存放在 hal_spienc.h
|
2025-01-23 16:37:00 +08:00
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中，主要接口有：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_ocx_lh4_fdc" data-ofbid="id__codeblock_ocx_lh4_fdc"><strong class="hl-keyword">int</strong> hal_spienc_init(<strong class="hl-keyword">void</strong>);
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<strong class="hl-keyword">void</strong> hal_spienc_set_cfg(u32 spi_bus, u32 addr, u32 cpos, u32 clen);
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<strong class="hl-keyword">void</strong> hal_spienc_start(<strong class="hl-keyword">void</strong>);
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<strong class="hl-keyword">void</strong> hal_spienc_stop(<strong class="hl-keyword">void</strong>);
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<strong class="hl-keyword">int</strong> hal_spienc_check_empty(<strong class="hl-keyword">void</strong>);</pre></div>
|
2025-04-23 17:54:31 +08:00
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</section>
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</div>
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</article></main></div>
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2025-01-23 16:37:00 +08:00
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<div class=" 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__id2" data-tocid="id__id2">源码说明</a></div></li><li class="section-item"><div class="section-title"><a href="#id__id3" data-tocid="id__id3">模块架构</a></div></li><li class="section-item"><div class="section-title"><a href="#id__id4" data-tocid="id__id4">设计要点</a></div></li><li class="section-item"><div class="section-title"><a href="#id__driver" data-tocid="id__driver">Driver 层接口设计</a></div></li><li class="section-item"><div class="section-title"><a href="#id__hal" data-tocid="id__hal">HAL 层接口设计</a></div></li></ul></div>
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