I2C_TwoBoard_CommunicationMaster_IT on CLing https://clingyang.github.io/tags/i2c_twoboard_communicationmaster_it/ Recent content in I2C_TwoBoard_CommunicationMaster_IT on CLing Hugo -- gohugo.io en-us CLing Tue, 08 Sep 2026 16:03:27 +0800 PUYA I2C — I2C 主机中断通信 https://clingyang.github.io/p/puya-i2c-i2c-%E4%B8%BB%E6%9C%BA%E4%B8%AD%E6%96%AD%E9%80%9A%E4%BF%A1/ Tue, 08 Sep 2026 14:52:21 +0800 https://clingyang.github.io/p/puya-i2c-i2c-%E4%B8%BB%E6%9C%BA%E4%B8%AD%E6%96%AD%E9%80%9A%E4%BF%A1/ <h1 id="i2c--i2c-主机中断通信">I2C — I2C 主机中断通信 </h1><blockquote> <p><strong>固件库</strong>: PY32F002B_Firmware V1.2.1<br> <strong>芯片</strong>: PUYA<br> <strong>源文件</strong>: <code>PUYA/PY32F002B_Firmware_V1.2.1/Projects/PY32F002B-STK/Example/I2C/I2C_TwoBoard_CommunicationMaster_IT/Src/main.c</code></p> </blockquote> <hr> <h2 id="功能简介">功能简介 </h2><p>本示例演示 I2C 总线通信。I2C 只需两根线（SCL+SDA）就能连接多个设备，是最常用的低速通信总线。</p> <h2 id="硬件准备">硬件准备 </h2><ul> <li>I2C 从设备（如 EEPROM、传感器模块）</li> <li>SCL/SDA 线上需要 4.7K 上拉电阻</li> </ul> <h2 id="完整代码">完整代码 </h2><div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span><span class="lnt">2 </span><span class="lnt">3 </span><span class="lnt">4 </span><span class="lnt">5 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-c" data-lang="c"><span class="line"><span class="cl"><span class="cp">#include</span> <span class="cpf">&#34;main.h&#34;</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#define DATA_LENGTH 15 </span><span class="cm">/* Data length*/</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#define I2C_ADDRESS 0xA0 </span><span class="cm">/* Local address 0xA0 */</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#define I2C_SPEEDCLOCK 100000 </span><span class="cm">/* Communication speed 100K */</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#define I2C_DUTYCYCLE I2C_DUTYCYCLE_16_9 </span><span class="cm">/* Duty cycle */</span><span class="cp"> </span></span></span></code></pre></td></tr></table> </div> </div><h2 id="代码讲解">代码讲解 </h2><p><strong>I2C 配置</strong>：设置通信速率（标准 100K / 快速 400K / 快速+ 1M）、从机地址、时钟拉伸。</p> <h2 id="实验现象">实验现象 </h2><ul> <li>主机和从机完成数据收发</li> <li>校验通过 LED 指示成功</li> </ul> <h2 id="注意事项">注意事项 </h2><ul> <li>I2C 总线需要上拉电阻（一般 4.7K）</li> <li>从机地址要与设备手册一致（注意 7 位/8 位地址的区别）</li> <li>写 EEPROM 后需要等待 5ms 以上再读</li> </ul> PUYA I2C — I2C 主机中断通信 https://clingyang.github.io/p/puya-i2c-i2c-%E4%B8%BB%E6%9C%BA%E4%B8%AD%E6%96%AD%E9%80%9A%E4%BF%A1/ Tue, 08 Sep 2026 14:52:21 +0800 https://clingyang.github.io/p/puya-i2c-i2c-%E4%B8%BB%E6%9C%BA%E4%B8%AD%E6%96%AD%E9%80%9A%E4%BF%A1/ <h1 id="i2c--i2c-主机中断通信">I2C — I2C 主机中断通信 </h1><blockquote> <p><strong>固件库</strong>: PY32F0xx_Firmware V1.5.0<br> <strong>芯片</strong>: PUYA<br> <strong>源文件</strong>: <code>PUYA/PY32F0xx_Firmware_V1.5.0/Projects/PY32F030-STK/Example/I2C/I2C_TwoBoard_CommunicationMaster_IT/Src/main.c</code></p> </blockquote> <hr> <h2 id="功能简介">功能简介 </h2><p>本示例演示 I2C 总线通信。I2C 只需两根线（SCL+SDA）就能连接多个设备，是最常用的低速通信总线。</p> <h2 id="硬件准备">硬件准备 </h2><ul> <li>I2C 从设备（如 EEPROM、传感器模块）</li> <li>SCL/SDA 线上需要 4.7K 上拉电阻</li> </ul> <h2 id="完整代码">完整代码 </h2><div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span><span class="lnt">2 </span><span class="lnt">3 </span><span class="lnt">4 </span><span class="lnt">5 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-c" data-lang="c"><span class="line"><span class="cl"><span class="cp">#include</span> <span class="cpf">&#34;main.h&#34;</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#define DATA_LENGTH 15 </span><span class="cm">/* Length of data */</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#define I2C_ADDRESS 0xA0 </span><span class="cm">/* Own address 0xA0 */</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#define I2C_SPEEDCLOCK 100000 </span><span class="cm">/* Communication speed 100K */</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#define I2C_DUTYCYCLE I2C_DUTYCYCLE_16_9 </span><span class="cm">/* Duty cycle */</span><span class="cp"> </span></span></span></code></pre></td></tr></table> </div> </div><h2 id="代码讲解">代码讲解 </h2><p><strong>I2C 配置</strong>：设置通信速率（标准 100K / 快速 400K / 快速+ 1M）、从机地址、时钟拉伸。</p> <h2 id="实验现象">实验现象 </h2><ul> <li>主机和从机完成数据收发</li> <li>校验通过 LED 指示成功</li> </ul> <h2 id="注意事项">注意事项 </h2><ul> <li>I2C 总线需要上拉电阻（一般 4.7K）</li> <li>从机地址要与设备手册一致（注意 7 位/8 位地址的区别）</li> <li>写 EEPROM 后需要等待 5ms 以上再读</li> </ul> PUYA I2C — I2C 主机中断通信 https://clingyang.github.io/p/puya-i2c-i2c-%E4%B8%BB%E6%9C%BA%E4%B8%AD%E6%96%AD%E9%80%9A%E4%BF%A1/ Tue, 08 Sep 2026 14:52:21 +0800 https://clingyang.github.io/p/puya-i2c-i2c-%E4%B8%BB%E6%9C%BA%E4%B8%AD%E6%96%AD%E9%80%9A%E4%BF%A1/ <h1 id="i2c--i2c-主机中断通信">I2C — I2C 主机中断通信 </h1><blockquote> <p><strong>固件库</strong>: PY32F403_Firmware V1.4.5<br> <strong>芯片</strong>: PUYA<br> <strong>源文件</strong>: <code>PUYA/PY32F403_Firmware_V1.4.5/Projects/PY32F403-STK/Example/I2C/I2C_TwoBoard_CommunicationMaster_IT/Src/main.c</code></p> </blockquote> <hr> <h2 id="功能简介">功能简介 </h2><p>本示例演示 I2C 总线通信。I2C 只需两根线（SCL+SDA）就能连接多个设备，是最常用的低速通信总线。</p> <h2 id="硬件准备">硬件准备 </h2><ul> <li>I2C 从设备（如 EEPROM、传感器模块）</li> <li>SCL/SDA 线上需要 4.7K 上拉电阻</li> </ul> <h2 id="完整代码">完整代码 </h2><div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span><span class="lnt">2 </span><span class="lnt">3 </span><span class="lnt">4 </span><span class="lnt">5 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-c" data-lang="c"><span class="line"><span class="cl"><span class="cp">#include</span> <span class="cpf">&#34;main.h&#34;</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#define DATA_LENGTH 15 </span><span class="cm">/* Length of data */</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#define I2C_ADDRESS 0xA0 </span><span class="cm">/* Own address 0xA0 */</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#define I2C_SPEEDCLOCK 100000 </span><span class="cm">/* Communication speed 100K */</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#define I2C_DUTYCYCLE I2C_DUTYCYCLE_16_9 </span><span class="cm">/* Duty cycle */</span><span class="cp"> </span></span></span></code></pre></td></tr></table> </div> </div><h2 id="代码讲解">代码讲解 </h2><p><strong>I2C 配置</strong>：设置通信速率（标准 100K / 快速 400K / 快速+ 1M）、从机地址、时钟拉伸。</p> <h2 id="实验现象">实验现象 </h2><ul> <li>主机和从机完成数据收发</li> <li>校验通过 LED 指示成功</li> </ul> <h2 id="注意事项">注意事项 </h2><ul> <li>I2C 总线需要上拉电阻（一般 4.7K）</li> <li>从机地址要与设备手册一致（注意 7 位/8 位地址的区别）</li> <li>写 EEPROM 后需要等待 5ms 以上再读</li> </ul> PUYA I2C — I2C 主机中断通信 https://clingyang.github.io/p/puya-i2c-i2c-%E4%B8%BB%E6%9C%BA%E4%B8%AD%E6%96%AD%E9%80%9A%E4%BF%A1/ Tue, 08 Sep 2026 14:52:21 +0800 https://clingyang.github.io/p/puya-i2c-i2c-%E4%B8%BB%E6%9C%BA%E4%B8%AD%E6%96%AD%E9%80%9A%E4%BF%A1/ <h1 id="i2c--i2c-主机中断通信">I2C — I2C 主机中断通信 </h1><blockquote> <p><strong>固件库</strong>: PY32L020_Firmware V1.2.1<br> <strong>芯片</strong>: PUYA<br> <strong>源文件</strong>: <code>PUYA/PY32L020_Firmware_V1.2.1/Projects/PY32L020-STK/Example/I2C/I2C_TwoBoard_CommunicationMaster_IT/Src/main.c</code></p> </blockquote> <hr> <h2 id="功能简介">功能简介 </h2><p>本示例演示 I2C 总线通信。I2C 只需两根线（SCL+SDA）就能连接多个设备，是最常用的低速通信总线。</p> <h2 id="硬件准备">硬件准备 </h2><ul> <li>I2C 从设备（如 EEPROM、传感器模块）</li> <li>SCL/SDA 线上需要 4.7K 上拉电阻</li> </ul> <h2 id="完整代码">完整代码 </h2><div class="highlight"><div class="chroma"> <table class="lntable"><tr><td class="lntd"> <pre tabindex="0" class="chroma"><code><span class="lnt">1 </span><span class="lnt">2 </span><span class="lnt">3 </span><span class="lnt">4 </span><span class="lnt">5 </span></code></pre></td> <td class="lntd"> <pre tabindex="0" class="chroma"><code class="language-c" data-lang="c"><span class="line"><span class="cl"><span class="cp">#include</span> <span class="cpf">&#34;main.h&#34;</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#define DATA_LENGTH 15 </span><span class="cm">/* Data length*/</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#define I2C_ADDRESS 0xA0 </span><span class="cm">/* Local address 0xA0 */</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#define I2C_SPEEDCLOCK 100000 </span><span class="cm">/* Communication speed 100K */</span><span class="cp"> </span></span></span><span class="line"><span class="cl"><span class="cp">#define I2C_DUTYCYCLE I2C_DUTYCYCLE_16_9 </span><span class="cm">/* Duty cycle */</span><span class="cp"> </span></span></span></code></pre></td></tr></table> </div> </div><h2 id="代码讲解">代码讲解 </h2><p><strong>I2C 配置</strong>：设置通信速率（标准 100K / 快速 400K / 快速+ 1M）、从机地址、时钟拉伸。</p> <h2 id="实验现象">实验现象 </h2><ul> <li>主机和从机完成数据收发</li> <li>校验通过 LED 指示成功</li> </ul> <h2 id="注意事项">注意事项 </h2><ul> <li>I2C 总线需要上拉电阻（一般 4.7K）</li> <li>从机地址要与设备手册一致（注意 7 位/8 位地址的区别）</li> <li>写 EEPROM 后需要等待 5ms 以上再读</li> </ul>