https://haifei.pro/tags/%E5%B5%8C%E5%85%A5%E5%BC%8F%E7%B3%BB%E7%BB%9F/Recent content in 嵌入式系统 on Haifei's HomeHugozh-CNhfwang132@gmail.com (hfwang132)hfwang132@gmail.com (hfwang132)This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.Thu, 29 Jun 2023 11:33:45 +0800https://haifei.pro/post_20230629_axi-spi-ip-%E6%A0%B8%E7%9A%84%E8%BD%AF%E7%A1%AC%E4%BB%B6%E8%AE%BE%E8%AE%A1/Thu, 29 Jun 2023 11:33:45 +0800hfwang132@gmail.com (hfwang132)https://haifei.pro/post_20230629_axi-spi-ip-%E6%A0%B8%E7%9A%84%E8%BD%AF%E7%A1%AC%E4%BB%B6%E8%AE%BE%E8%AE%A1/<h3 id="1-基础">1 基础</h3> <p>SPI 有三线模式和四线模式。三线模式有 <code>SS</code>（Slave Select）, <code>SCK</code>（SPI Clock）, <code>MOSI</code>（Master-Out-Slave-In）三条线。四线模式多了一条 <code>MISO</code>（Master-In-Slave-Out）。</p>