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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_config.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1"><span class="- topic/ph ph">Q</span>SPI 配置</h1><div class="date inPage">16 Dec 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"><section class="- topic/section section" id="spi_configuration__section_mgm_jwy_21c" data-ofbid="spi_configuration__section_mgm_jwy_21c"><h2 class="- topic/title title sectiontitle">内核配置</h2>
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<p class="- topic/p p" data-ofbid="d245707e29__20250121171701">使能 SPI 相关的内核驱动，可在通过下列命令进行配置（在 SDK 顶层目录执行）:</p>
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<ol class="- topic/ol ol" id="spi_configuration__ol_ajx_4wl_sdc" data-ofbid="spi_configuration__ol_ajx_4wl_sdc"><li class="- topic/li li" data-ofbid="d245707e33__20250121171701">
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<div class="- topic/div div">
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<div class="- topic/p p" data-ofbid="d245707e37__20250121171701">在 SDK 根目录下，执行下列命令，进入 kernel
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的功能配置界面：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="spi_configuration__codeblock_wg1_3ml_sdc" data-ofbid="spi_configuration__codeblock_wg1_3ml_sdc">make kernel-menuconfig</pre></div>
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<p class="- topic/p p" data-ofbid="d245707e42__20250121171701">或使用简写命令</p>
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<div class="- topic/p p" data-ofbid="d245707e45__20250121171701">
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="spi_configuration__codeblock_uss_hml_sdc" data-ofbid="spi_configuration__codeblock_uss_hml_sdc">make km</pre>
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</div>
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</div>
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</li><li class="- topic/li li" data-ofbid="d245707e52__20250121171701">
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<div class="- topic/p p" data-ofbid="d245707e54__20250121171701">在内核的配置界面中，进行下列的选择：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="spi_configuration__pre_ogm_jwy_21c" data-ofbid="spi_configuration__pre_ogm_jwy_21c">Device Drivers --->
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[*] SPI support --->
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<*> ArtInChip SPI controller
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......
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[*] DMA Engine support --->
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<*> ArtInChip SoCs DMA support
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</pre></div>
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<p class="- topic/p p" data-ofbid="d245707e59__20250121171701">结果：内核 SPI 驱动使能，且 SPI 可使用 DMA 进行数据传输。</p>
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</li></ol>
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</section><section class="- topic/section section" id="spi_configuration__section_pgm_jwy_21c" data-ofbid="spi_configuration__section_pgm_jwy_21c"><h2 class="- topic/title title sectiontitle">DTS 配置</h2>
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<p class="- topic/p p" data-ofbid="d245707e68__20250121171701">芯片级的 DTS:</p>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="spi_configuration__pre_qgm_jwy_21c" data-ofbid="spi_configuration__pre_qgm_jwy_21c">spi0: spi@<span class="hl-number">10400000</span> {
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compatible = <span class="hl-string">"artinchip,aic-spi-v1.0"</span>;
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reg = <<span class="hl-number">0x0</span> <span class="hl-number">0x10400000</span> <span class="hl-number">0x0</span> <span class="hl-number">0x1000</span>>;
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interrupts-extended = <&plic0 <span class="hl-number">44</span> IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&cmu CLK_SPI0>;
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resets = <&rst RESET_SPI0>;
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dmas = <&dma DMA_SPI0>, <&dma DMA_SPI0>;
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dma-names = <span class="hl-string">"rx"</span>, <span class="hl-string">"tx"</span>;
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#address-cells = <<span class="hl-number">1</span>>;
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#size-cells = <<span class="hl-number">0</span>>;
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spi-max-frequency = <<span class="hl-number">24000000</span>>;
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};
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spi1: spi@<span class="hl-number">10410000</span> {
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compatible = <span class="hl-string">"artinchip,aic-spi-v1.0"</span>;
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reg = <<span class="hl-number">0x0</span> <span class="hl-number">0x10410000</span> <span class="hl-number">0x0</span> <span class="hl-number">0x1000</span>>;
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interrupts-extended = <&plic0 <span class="hl-number">45</span> IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&cmu CLK_SPI1>;
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resets = <&rst RESET_SPI1>;
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dmas = <&dma DMA_SPI1>, <&dma DMA_SPI1>;
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dma-names = <span class="hl-string">"rx"</span>, <span class="hl-string">"tx"</span>;
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#address-cells = <<span class="hl-number">1</span>>;
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#size-cells = <<span class="hl-number">0</span>>;
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spi-max-frequency = <<span class="hl-number">24000000</span>>;
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};
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</pre>
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<p class="- topic/p p" data-ofbid="d245707e74__20250121171701">其中板级的配置 <span class="+ topic/ph sw-d/filepath ph filepath">board.dts</span> 中需要使能该模块，并且根据实际情况，配置最大工作频率：</p>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="spi_configuration__pre_rgm_jwy_21c" data-ofbid="spi_configuration__pre_rgm_jwy_21c">&spi0 {
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pinctrl-names = <span class="hl-string">"default"</span>;
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pinctrl-<span class="hl-number">0</span> = <&spi0_pins_a>;
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spi-max-frequency = <<span class="hl-number">100000000</span>>;
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status = <span class="hl-string">"okay"</span>;
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};
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&spi1 {
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pinctrl-names = <span class="hl-string">"default"</span>;
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pinctrl-<span class="hl-number">0</span> = <&spi1_pins_a>;
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spi-max-frequency = <<span class="hl-number">100000000</span>>;
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status = <span class="hl-string">"okay"</span>;
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};
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</pre>
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<p class="- topic/p p" data-ofbid="d245707e84__20250121171701"><span class="+ topic/ph sw-d/filepath ph filepath">board-u-boot.dtsi</span> 需要设置 <code class="+ topic/ph pr-d/codeph ph codeph">u-boot,dm-pre-reloc</code>
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，只有设置了该标记，SPL 中才可以使用 SPI:</p>
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<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="spi_configuration__pre_sgm_jwy_21c" data-ofbid="spi_configuration__pre_sgm_jwy_21c">&spi0 {
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u-boot,dm-pre-reloc;
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};
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&spi1 {
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u-boot,dm-pre-reloc;
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};
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</pre>
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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="#spi_configuration__section_mgm_jwy_21c" data-tocid="spi_configuration__section_mgm_jwy_21c">内核配置</a></div></li><li class="section-item"><div class="section-title"><a href="#spi_configuration__section_pgm_jwy_21c" data-tocid="spi_configuration__section_pgm_jwy_21c">DTS 配置</a></div></li></ul></div>
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