http://blog.cmac4603.dev/tags/pinout/Recent content in Pinout on NotebookHugoen-usSun, 19 Jul 2026 10:28:54 +0100http://blog.cmac4603.dev/posts/lily-t-dongle-s3-sd-card-pins/Sun, 19 Jul 2026 10:28:54 +0100http://blog.cmac4603.dev/posts/lily-t-dongle-s3-sd-card-pins/<h2 id="sd-card-pin-numbers-for-use-with-spi">SD Card pin numbers for use with SPI</h2> <table> <thead> <tr> <th>LilyGo Pin Name</th> <th>GPIO #</th> <th>SPI</th> </tr> </thead> <tbody> <tr> <td>SDMMC_D0</td> <td>14</td> <td>MISO</td> </tr> <tr> <td>SDMMC_D1</td> <td>17</td> <td></td> </tr> <tr> <td>SDMMC_D2</td> <td>21</td> <td></td> </tr> <tr> <td>SDMMC_D3</td> <td>18</td> <td>CS</td> </tr> <tr> <td>SDMMC_CLK</td> <td>12</td> <td>SCK</td> </tr> <tr> <td>SDMMC_CMD</td> <td>16</td> <td>MOSI</td> </tr> </tbody> </table> <h2 id="example">Example</h2> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-rust" data-lang="rust"><span style="display:flex;"><span><span style="color:#66d9ef">let</span> spi_bus <span style="color:#f92672">=</span> Spi::new( </span></span><span style="display:flex;"><span> peripherals.<span style="color:#66d9ef">SPI2</span>, </span></span><span style="display:flex;"><span> spi::master::Config::default() </span></span><span style="display:flex;"><span> .with_frequency(Rate::from_khz(<span style="color:#ae81ff">400</span>)) </span></span><span style="display:flex;"><span> .with_mode(spi::Mode::_0), </span></span><span style="display:flex;"><span>) </span></span><span style="display:flex;"><span>.unwrap() </span></span><span style="display:flex;"><span>.with_sck(peripherals.<span style="color:#66d9ef">GPIO12</span>) <span style="color:#75715e">// clk </span></span></span><span style="display:flex;"><span>.with_mosi(peripherals.<span style="color:#66d9ef">GPIO16</span>) <span style="color:#75715e">// cmd </span></span></span><span style="display:flex;"><span>.with_miso(peripherals.<span style="color:#66d9ef">GPIO14</span>) <span style="color:#75715e">// d0 </span></span></span><span style="display:flex;"><span>.into_async(); </span></span><span style="display:flex;"><span> </span></span><span style="display:flex;"><span><span style="color:#66d9ef">let</span> sd_cs <span style="color:#f92672">=</span> Output::new( </span></span><span style="display:flex;"><span> peripherals.<span style="color:#66d9ef">GPIO18</span>, <span style="color:#75715e">// d3 </span></span></span><span style="display:flex;"><span> Level::High, </span></span><span style="display:flex;"><span> OutputConfig::default().with_pull(Pull::Up), </span></span><span style="display:flex;"><span>); </span></span><span style="display:flex;"><span><span style="color:#66d9ef">let</span> spi_dev <span style="color:#f92672">=</span> ExclusiveDevice::new(spi_bus, sd_cs, Delay).unwrap(); </span></span><span style="display:flex;"><span><span style="color:#66d9ef">let</span> sdcard <span style="color:#f92672">=</span> SdCard::new(spi_dev, Delay); </span></span></code></pre></div>