描述
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<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">注:* 为必填项</p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;"><strong><span style="color: #0093e6;">请在报名阶段填写 ↓</span></strong></p>
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<h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">* 1、项目功能介绍</h3>
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<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;"><span style="color: #000000; font-size: 14px;">很多年前开始玩Arduino 的时候使用的是 Arduino Uno,它使用 Atmel 328P 的主控。当时有一个有趣的项目是使用Uno 给另外一个设备刷写 BootLoader。这个项目能够极大的方便使用 Arduino。</span></p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;"><span style="color: #000000; font-size: 14px;">这次的项目是一个使用 ESP32-S3 实现的 ESP32 下载器。</span></p>
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<h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">*2、项目属性</h3>
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<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;"><span style="color: #000000; font-size: 14px;">原创项目首测公开</span></p>
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<h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">* 3、开源协议</h3>
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<p style="line-height: 1.8;">Public Domain</p>
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<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;"><strong><span style="color: #0093e6;">请在竞赛阶段填写 ↓</span></strong></p>
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<h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">*4、硬件部分</h3>
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<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">硬件部分非常简单,可以看做是一个 ESP32S3 的最小系统。</p>
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<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">电路图:</p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;"><img src="//image.lceda.cn/pullimage/qyHjZ4KjEhpVWj8eRrrg2bHm2JasbCuJenvFV4ng.png"></p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">PCB:</p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;"><img src="//image.lceda.cn/pullimage/MsmKJw0NqAwGIzdDhRP3NAi7tUMnw2ew6ZlX4HaN.png"></p>
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<h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">*5、软件部分</h3>
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<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;"><span style="color: #000000;"><span style="font-size: 14px;">代码使用 IDF 编写,首先实现基于 TinyUSB 的 USB CDC 功能。</span></span></p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;"><span style="color: #000000;"><span style="font-size: 14px;">1.TinyUSB 是 IDF 内置的原生 USB 库,通过下面的代码就可以实现 USB CDC 功能</span></span></p>
<p> ESP_LOGI(TAG, "USB initialization");</p>
<p> const tinyusb_config_t tusb_cfg = {<br> .device_descriptor = NULL,<br> .string_descriptor = NULL,<br> .external_phy = false,<br> .configuration_descriptor = NULL,<br> };</p>
<p> ESP_ERROR_CHECK(tinyusb_driver_install(&tusb_cfg));</p>
<p> tinyusb_config_cdcacm_t acm_cfg = {<br> .usb_dev = TINYUSB_USBDEV_0,<br> .cdc_port = TINYUSB_CDC_ACM_0,<br> .rx_unread_buf_sz = 64,<br> .callback_rx = &tinyusb_cdc_rx_callback, // the first way to register a callback<br> .callback_rx_wanted_char = NULL,<br> .callback_line_state_changed = &tinyusb_cdc_line_state_changed_callback,<br> .callback_line_coding_changed = &tinyusb_cdc_line_coding_changed_callback<br> };</p>
<p> ESP_ERROR_CHECK(tusb_cdc_acm_init(&acm_cfg));</p>
<p> ESP_LOGI(TAG, "USB initialization DONE");</p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height: 1.8;"> </p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height: 1.8;">2.之后, USB CDC收到的数据会出现在下面再合格回调函数中</p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height: 1.8;">void tinyusb_cdc_rx_callback(int itf, cdcacm_event_t *event)<br>{<br> // USB CDC 接收的处理<br> uint8_t rx_buf[CONFIG_TINYUSB_CDC_RX_BUFSIZE];<br> size_t rx_size = 0;<br> // 读取放入 rx_buf 缓冲区<br> esp_err_t ret = tinyusb_cdcacm_read(itf, rx_buf, CONFIG_TINYUSB_CDC_RX_BUFSIZE, &rx_size);<br> if (ret == ESP_OK) {<br> // 根据资料,如果缓冲区有足够的空间,那么不会阻塞<br> uart_write_bytes(UART_NUM_1,rx_buf,rx_size);<br> } else {<br> ESP_LOGE(TAG, "Read Error");<br> }<br>}</p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height: 1.8;">3.Arduino ESP32 的烧写工具是 ESPTool,它通过将串口波特率从 9600切换到 115200 来通知 ESP32S3进入下载模式(这部分代码可以在 ESP32 的库中看到)</p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height: 1.8;">对饮的,我们在代码中做一个判断,如果出现了这样的切换,那么通过2个 GPIO 拉被刷机进入下载模式,然后通过串口通讯完成下载</p>
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<p>// 设置波特率的回调函数<br>void tinyusb_cdc_line_coding_changed_callback(int itf, cdcacm_event_t *event)<br>{<br> cdc_line_coding_t *line_coding = event->line_coding_changed_data.p_line_coding;<br> Baudrate = line_coding->bit_rate;</p>
<p> if (previous_Baudrate != Baudrate) {<br> ESP_LOGI(TAG, "Change Baudrate from %lu to %lu", previous_Baudrate, Baudrate);<br> <br> // 如果出现从 9600 波特率到 115200 的切换,那么说明是要进入下载模式<br> if ((previous_Baudrate==9600)&&(Baudrate==115200)) {<br> DownloadMode=true;<br> }<br> if ((Baudrate==115200)||(Baudrate==921600)) {<br> uart_set_baudrate(UART_NUM_1, Baudrate);<br> }<br> previous_Baudrate=Baudrate;<br> }</p>
<p>}</p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height: 1.8;"> </p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height: 1.8;">最终烧写代码后,可以通过下面这个命令进行简单测试,它会让ESP32 S3进入下载模式,然后通过命令读取MAC地址,基本上这个命令如果可以跑过,那么烧写也没有问题</p>
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<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt pap-left-indent-1.6em" style="line-height: 1.8;">Esptool5 --trace -c esp32s3 -p com19 read-mac</p>
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<h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">*6、BOM清单</h3>
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<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;"><span style="color: #95a5a6; font-size: 14px;">请输入内容…</span></p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;"> </p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;"><span style="color: #95a5a6; font-size: 14px;">注:项目涉及的BOM清单。在<span style="text-decoration: underline;"><a href="https://lceda.cn/editor" target="_blank">嘉立创EDA</a> </span>生成/上传设计文件后,BOM将自动生成至项目详情;建议包括型号、品牌、名称、封装、采购渠道、用途等内容。具体内容和形式应以表达清楚项目构成为准。 </span></p>
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<h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">*7、大赛LOGO验证</h3>
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<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;"><img src="//image.lceda.cn/pullimage/qqwV241I7DH1wIT5EeD5o9HnU5xsN1r3t7pQ6826.jpeg" alt="" width="2673" height="2821"></p>
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<h3 class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;">* 8、演示您的项目并录制成视频上传</h3>
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<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;"><span style="color: #95a5a6; font-size: 14px;">视频要求:请横屏拍摄,分辨率不低于1280×720,格式Mp4/Mov,单个视频大小限100M内;</span></p>
<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;"><span style="color: #95a5a6; font-size: 14px;">视频标题:立创电赛:{项目名称}-{视频模块名称};如立创电赛:《自动驾驶》-团队介绍。</span></p>
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<p class="paragraph text-align-type-left pap-line-1.3 pap-line-rule-auto pap-spacing-before-3pt pap-spacing-after-3pt" style="line-height: 1.8;"><span style="font-size: 14px;"><a href="/posts/42551e8f2f2548cabc1c36626a42da94" target="_blank">前往查看更多详情 ></a></span></p>
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