PUYA — 串口 (USART) on CLing https://clingyang.github.io/post/mcu_puya/py32f403_firmware_v1_4_5_usart/ Recent content in PUYA — 串口 (USART) on CLing Hugo -- gohugo.io en-us CLing Tue, 08 Sep 2026 16:03:27 +0800 PUYA USART — USART_HyperTerminal_AutoBaund_IT https://clingyang.github.io/p/puya-usart-usart_hyperterminal_autobaund_it/ Tue, 08 Sep 2026 14:52:21 +0800 https://clingyang.github.io/p/puya-usart-usart_hyperterminal_autobaund_it/ <h1 id="usart--usart_hyperterminal_autobaund_it">USART — USART_HyperTerminal_AutoBaund_IT </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/USART/USART_HyperTerminal_AutoBaund_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 USART 串口通信。串口是最基本的通信接口，几乎每个嵌入式项目都会用到。</p> <h2 id="硬件准备">硬件准备 </h2><ul> <li>USB 转串口模块（如 CH340、CP2102）</li> <li>连接：开发板 TX → 模块 RX，开发板 RX → 模块 TX，共地</li> <li>电脑端打开串口助手（如 SSCOM、XCOM），波特率与代码一致</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></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 AUTO_BAUD_MODE0 /* Automatic baud rate detection mode selection, measuring from the start bit; </span></span></span></code></pre></td></tr></table> </div> </div><h2 id="代码讲解">代码讲解 </h2><p>代码结构清晰，主要包含外设初始化配置和主循环中的功能逻辑。请结合注释理解每一步的含义。</p> <h2 id="实验现象">实验现象 </h2><ul> <li>串口助手收到开发板发送的数据</li> <li>发送数据后开发板原样返回（回显）</li> </ul> <h2 id="注意事项">注意事项 </h2><ul> <li>串口助手波特率必须与代码一致</li> <li>检查 TX/RX 是否交叉连接</li> <li>共地是必须的</li> </ul> PUYA USART — USART_HyperTerminal_DMA https://clingyang.github.io/p/puya-usart-usart_hyperterminal_dma/ Tue, 08 Sep 2026 14:52:21 +0800 https://clingyang.github.io/p/puya-usart-usart_hyperterminal_dma/ <h1 id="usart--usart_hyperterminal_dma">USART — USART_HyperTerminal_DMA </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/USART/USART_HyperTerminal_DMA/Src/main.c</code></p> </blockquote> <hr> <h2 id="功能简介">功能简介 </h2><p>本示例演示串口 DMA 收发。数据搬运完全由 DMA 硬件完成，CPU 只需在搬运完成后收到通知。适合大数据量、高速通信场景。</p> <h2 id="硬件准备">硬件准备 </h2><ul> <li>USB 转串口模块（如 CH340、CP2102）</li> <li>连接：开发板 TX → 模块 RX，开发板 RX → 模块 TX，共地</li> <li>电脑端打开串口助手（如 SSCOM、XCOM），波特率与代码一致</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></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 COUNTOF(__BUFFER__) (sizeof(__BUFFER__) / sizeof(*(__BUFFER__))) </span></span></span><span class="line"><span class="cl"><span class="cp">#define TXSTARTMESSAGESIZE (COUNTOF(aTxStartMessage) - 1) </span></span></span><span class="line"><span class="cl"><span class="cp">#define TXENDMESSAGESIZE (COUNTOF(aTxEndMessage) - 1) </span></span></span></code></pre></td></tr></table> </div> </div><h2 id="代码讲解">代码讲解 </h2><p>代码结构清晰，主要包含外设初始化配置和主循环中的功能逻辑。请结合注释理解每一步的含义。</p> <h2 id="实验现象">实验现象 </h2><ul> <li>串口助手收到开发板发送的数据</li> <li>发送数据后开发板原样返回（回显）</li> </ul> <h2 id="注意事项">注意事项 </h2><ul> <li>串口助手波特率必须与代码一致</li> <li>检查 TX/RX 是否交叉连接</li> <li>共地是必须的</li> </ul> PUYA USART — USART_HyperTerminal_IT https://clingyang.github.io/p/puya-usart-usart_hyperterminal_it/ Tue, 08 Sep 2026 14:52:21 +0800 https://clingyang.github.io/p/puya-usart-usart_hyperterminal_it/ <h1 id="usart--usart_hyperterminal_it">USART — USART_HyperTerminal_IT </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/USART/USART_HyperTerminal_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 USART 串口通信。串口是最基本的通信接口，几乎每个嵌入式项目都会用到。</p> <h2 id="硬件准备">硬件准备 </h2><ul> <li>USB 转串口模块（如 CH340、CP2102）</li> <li>连接：开发板 TX → 模块 RX，开发板 RX → 模块 TX，共地</li> <li>电脑端打开串口助手（如 SSCOM、XCOM），波特率与代码一致</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></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 COUNTOF(__BUFFER__) (sizeof(__BUFFER__) / sizeof(*(__BUFFER__))) </span></span></span><span class="line"><span class="cl"><span class="cp">#define TXSTARTMESSAGESIZE (COUNTOF(aTxStartMessage) - 1) </span></span></span><span class="line"><span class="cl"><span class="cp">#define TXENDMESSAGESIZE (COUNTOF(aTxEndMessage) - 1) </span></span></span></code></pre></td></tr></table> </div> </div><h2 id="代码讲解">代码讲解 </h2><p>代码结构清晰，主要包含外设初始化配置和主循环中的功能逻辑。请结合注释理解每一步的含义。</p> <h2 id="实验现象">实验现象 </h2><ul> <li>串口助手收到开发板发送的数据</li> <li>发送数据后开发板原样返回（回显）</li> </ul> <h2 id="注意事项">注意事项 </h2><ul> <li>串口助手波特率必须与代码一致</li> <li>检查 TX/RX 是否交叉连接</li> <li>共地是必须的</li> </ul> PUYA USART — USART_HyperTerminal_Polling https://clingyang.github.io/p/puya-usart-usart_hyperterminal_polling/ Tue, 08 Sep 2026 14:52:21 +0800 https://clingyang.github.io/p/puya-usart-usart_hyperterminal_polling/ <h1 id="usart--usart_hyperterminal_polling">USART — USART_HyperTerminal_Polling </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/USART/USART_HyperTerminal_Polling/Src/main.c</code></p> </blockquote> <hr> <h2 id="功能简介">功能简介 </h2><p>本示例演示串口轮询收发。CPU 不断检查标志位来判断是否收到数据或是否可以发送。简单直接，但会占用 CPU 时间。</p> <h2 id="硬件准备">硬件准备 </h2><ul> <li>USB 转串口模块（如 CH340、CP2102）</li> <li>连接：开发板 TX → 模块 RX，开发板 RX → 模块 TX，共地</li> <li>电脑端打开串口助手（如 SSCOM、XCOM），波特率与代码一致</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></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 COUNTOF(__BUFFER__) (sizeof(__BUFFER__) / sizeof(*(__BUFFER__))) </span></span></span><span class="line"><span class="cl"><span class="cp">#define TXSTARTMESSAGESIZE (COUNTOF(aTxStartMessage) - 1) </span></span></span><span class="line"><span class="cl"><span class="cp">#define TXENDMESSAGESIZE (COUNTOF(aTxEndMessage) - 1) </span></span></span></code></pre></td></tr></table> </div> </div><h2 id="代码讲解">代码讲解 </h2><p>代码结构清晰，主要包含外设初始化配置和主循环中的功能逻辑。请结合注释理解每一步的含义。</p> <h2 id="实验现象">实验现象 </h2><ul> <li>串口助手收到开发板发送的数据</li> <li>发送数据后开发板原样返回（回显）</li> </ul> <h2 id="注意事项">注意事项 </h2><ul> <li>串口助手波特率必须与代码一致</li> <li>检查 TX/RX 是否交叉连接</li> <li>共地是必须的</li> </ul>