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<li class="toctree-l1"><a class="reference internal" href="../class/class_cdc.html">CDC</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../class/class_audio.html">UAC</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../class/class_video.html">UVC</a></li>
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<p class="caption" role="heading"><span class="caption-text">例程说明</span></p>
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<ul class="current">
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<li class="toctree-l1"><a class="reference internal" href="usbd_cdc_acm.html">usbd_cdc_acm</a></li>
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<li class="toctree-l1"><a class="reference internal" href="usbd_hid.html">usbd_hid</a></li>
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<li class="toctree-l1"><a class="reference internal" href="usbd_msc.html">usbd_msc</a></li>
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<li class="toctree-l1"><a class="reference internal" href="usbd_ecm.html">usbd_cdc_ecm</a></li>
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<li class="toctree-l1"><a class="reference internal" href="usbh_serial.html">usbh_serial</a></li>
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<li class="toctree-l1"><a class="reference internal" href="usbh_hid.html">usbh_hid</a></li>
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<li class="toctree-l1"><a class="reference internal" href="usbh_msc.html">usbh_msc</a></li>
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<li class="toctree-l1 current"><a class="current reference internal" href="#">usbh_net</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="#usb">USB 网卡相关的宏和文件</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#id1">USB 网卡对接过程</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#usb-lwip">USB 网卡 LWIP 配置宏相关注意事项</a></li>
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</ul>
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</li>
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<li class="toctree-l1"><a class="reference internal" href="usbh_bluetooth.html">usbh_bluetooth</a></li>
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<li class="toctree-l1"><a class="reference internal" href="usbd_vendor.html">vendor device 驱动编写</a></li>
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<li class="toctree-l1"><a class="reference internal" href="usb_otg.html">OTG 功能的使用</a></li>
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</ul>
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<p class="caption" role="heading"><span class="caption-text">USBIP 介绍</span></p>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="../usbip/ohci.html">OHCI</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../usbip/ehci.html">EHCI</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../usbip/xhci.html">XHCI</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../usbip/chipidea.html">CHIPIDEA</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../usbip/dwc2.html">DWC2</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../usbip/musb.html">MUSB</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../usbip/fotg210.html">FOTG210</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../usbip/cdns2.html">CDNS2</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../usbip/cdns3.html">CDNS3</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../usbip/dwc3.html">DWC3</a></li>
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</ul>
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<p class="caption" role="heading"><span class="caption-text">工具使用</span></p>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="../tools/index.html">chryusb_configurator</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../tools/index.html#usb-protocol-suite">力科 USB Protocol Suite</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../tools/index.html#wireshark">Wireshark</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../tools/index.html#audacity">Audacity</a></li>
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<p class="caption" role="heading"><span class="caption-text">版本说明</span></p>
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<li class="toctree-l1"><a class="reference internal" href="../version.html">版本说明</a></li>
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<p class="caption" role="heading"><span class="caption-text">性能展示</span></p>
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<li class="toctree-l1"><a class="reference internal" href="../show/index.html">性能展示</a></li>
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<section id="usbh-net">
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<h1>usbh_net<a class="headerlink" href="#usbh-net" title="Link to this heading"></a></h1>
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<p>本节主要介绍 USB 网卡的使用，USB 网卡推荐采用 AIR780(RNDIS)，EC20(ECM/RNDIS), 手机（RNDIS）,RTL8152 USB 网卡，AX88772 USB 网卡。</p>
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<div class="admonition note">
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<p class="admonition-title">Note</p>
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<p>看完下面内容，你将感受到什么是全自动化的 USB 网卡驱动对接，无需手动调用任何函数。</p>
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</div>
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<div class="admonition caution">
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<p class="admonition-title">Caution</p>
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<p>请注意，部分 4G 网卡默认不带自动拨号功能，请更换固件或者使用 AT 配置成自动拨号，否则无法获取 IP。</p>
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</div>
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<section id="usb">
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<h2>USB 网卡相关的宏和文件<a class="headerlink" href="#usb" title="Link to this heading"></a></h2>
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<p>网卡相关的宏如下，主要用于根据不同的网络组件注册网卡驱动：</p>
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<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="c1">// #define CONFIG_USBHOST_PLATFORM_CDC_ECM</span>
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<span class="c1">// #define CONFIG_USBHOST_PLATFORM_CDC_RNDIS</span>
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<span class="c1">// #define CONFIG_USBHOST_PLATFORM_CDC_NCM</span>
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<span class="c1">// #define CONFIG_USBHOST_PLATFORM_ASIX</span>
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<span class="c1">// #define CONFIG_USBHOST_PLATFORM_RTL8152</span>
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</pre></div>
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</div>
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<div class="admonition note">
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<p class="admonition-title">Note</p>
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<p>如果使用 Kconfig 系统，上述宏自定生成，其他平台请手动定义。</p>
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</div>
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<p>USB 网卡传输层面已经对接好了相关网络组件，列举如下：</p>
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<ul class="simple">
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<li><p>自定义 OS + LWIP 请使用 <strong>platform/lwip/usbh_lwip.c</strong>，需要自行包含该文件，并使能上述相关的宏</p></li>
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<li><p>RT-THREAD + LWIP 请使用 <strong>platform/rtthread/usbh_lwip.c</strong>，在 Kconfig 中使能对应的网卡驱动后自动勾选该文件</p></li>
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<li><p>ESP-IDF + LWIP 请使用 <strong>platform/freertos/usbh_net.c</strong>，在 Kconfig 中使能对应的网卡驱动后自动勾选该文件</p></li>
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<li><p>NUTTX + NUTTX 网络组件 请使用 <strong>platform/nuttx/usbh_net.c</strong>，在 Kconfig 中使能对应的网卡驱动后自动勾选该文件</p></li>
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</ul>
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<div class="admonition note">
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<p class="admonition-title">Note</p>
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<p>如果是自行添加代码，别忘了添加 USB 网卡驱动相关的源文件，例如 <strong>class/usbh_cdc_ecm.c</strong>。所以我们推荐搭配对应平台使用哦，省去自己添加文件的麻烦</p>
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</div>
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</section>
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<section id="id1">
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<h2>USB 网卡对接过程<a class="headerlink" href="#id1" title="Link to this heading"></a></h2>
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<p>下面举例对接 LWIP 的对接过程。</p>
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<ul class="simple">
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<li><p>在 USB 网卡枚举完成以后，会 <strong>自动</strong> 调用 <cite>usbh_xxx_run</cite> 函数，此时注册 netif 驱动，并且开启 DHCP 客户端和获取 IP 的定时器。</p></li>
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</ul>
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<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">void</span><span class="w"> </span><span class="nf">usbh_cdc_ecm_run</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_cdc_ecm</span><span class="w"> </span><span class="o">*</span><span class="n">cdc_ecm_class</span><span class="p">)</span>
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<span class="p">{</span>
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<span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="nc">netif</span><span class="w"> </span><span class="o">*</span><span class="n">netif</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">&</span><span class="n">g_cdc_ecm_netif</span><span class="p">;</span>
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<span class="w"> </span><span class="n">netif</span><span class="o">-></span><span class="n">hwaddr_len</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">6</span><span class="p">;</span>
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<span class="w"> </span><span class="n">memcpy</span><span class="p">(</span><span class="n">netif</span><span class="o">-></span><span class="n">hwaddr</span><span class="p">,</span><span class="w"> </span><span class="n">cdc_ecm_class</span><span class="o">-></span><span class="n">mac</span><span class="p">,</span><span class="w"> </span><span class="mi">6</span><span class="p">);</span>
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<span class="w"> </span><span class="n">IP4_ADDR</span><span class="p">(</span><span class="o">&</span><span class="n">g_ipaddr</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">);</span>
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<span class="w"> </span><span class="n">IP4_ADDR</span><span class="p">(</span><span class="o">&</span><span class="n">g_netmask</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">);</span>
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<span class="w"> </span><span class="n">IP4_ADDR</span><span class="p">(</span><span class="o">&</span><span class="n">g_gateway</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> </span><span class="mi">0</span><span class="p">);</span>
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<span class="w"> </span><span class="n">netif</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">netif_add</span><span class="p">(</span><span class="n">netif</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">g_ipaddr</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">g_netmask</span><span class="p">,</span><span class="w"> </span><span class="o">&</span><span class="n">g_gateway</span><span class="p">,</span><span class="w"> </span><span class="nb">NULL</span><span class="p">,</span><span class="w"> </span><span class="n">usbh_cdc_ecm_if_init</span><span class="p">,</span><span class="w"> </span><span class="n">tcpip_input</span><span class="p">);</span>
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<span class="w"> </span><span class="n">netif_set_default</span><span class="p">(</span><span class="n">netif</span><span class="p">);</span>
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<span class="w"> </span><span class="k">while</span><span class="w"> </span><span class="p">(</span><span class="o">!</span><span class="n">netif_is_up</span><span class="p">(</span><span class="n">netif</span><span class="p">))</span><span class="w"> </span><span class="p">{</span>
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<span class="w"> </span><span class="p">}</span>
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|
||
<span class="w"> </span><span class="n">dhcp_handle</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">usb_osal_timer_create</span><span class="p">(</span><span class="s">"dhcp"</span><span class="p">,</span><span class="w"> </span><span class="mi">200</span><span class="p">,</span><span class="w"> </span><span class="n">dhcp_timeout</span><span class="p">,</span><span class="w"> </span><span class="n">netif</span><span class="p">,</span><span class="w"> </span><span class="nb">true</span><span class="p">);</span>
|
||
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">dhcp_handle</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="nb">NULL</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
|
||
<span class="w"> </span><span class="n">USB_LOG_ERR</span><span class="p">(</span><span class="s">"timer creation failed! </span><span class="se">\r\n</span><span class="s">"</span><span class="p">);</span>
|
||
<span class="w"> </span><span class="k">while</span><span class="w"> </span><span class="p">(</span><span class="mi">1</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
|
||
<span class="w"> </span><span class="p">}</span>
|
||
<span class="w"> </span><span class="p">}</span>
|
||
|
||
<span class="w"> </span><span class="n">usb_osal_thread_create</span><span class="p">(</span><span class="s">"usbh_cdc_ecm_rx"</span><span class="p">,</span><span class="w"> </span><span class="mi">2048</span><span class="p">,</span><span class="w"> </span><span class="n">CONFIG_USBHOST_PSC_PRIO</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="n">usbh_cdc_ecm_rx_thread</span><span class="p">,</span><span class="w"> </span><span class="nb">NULL</span><span class="p">);</span>
|
||
<span class="cp">#if LWIP_DHCP</span>
|
||
<span class="w"> </span><span class="n">dhcp_start</span><span class="p">(</span><span class="n">netif</span><span class="p">);</span>
|
||
<span class="w"> </span><span class="n">usb_osal_timer_start</span><span class="p">(</span><span class="n">dhcp_handle</span><span class="p">);</span>
|
||
<span class="cp">#endif</span>
|
||
<span class="p">}</span>
|
||
</pre></div>
|
||
</div>
|
||
<ul class="simple">
|
||
<li><p><cite>usbh_lwip_eth_output_common</cite> 用于将发送 pbuf 组装成 USB 网卡数据包</p></li>
|
||
<li><p><cite>usbh_lwip_eth_input_common</cite> 用于将 USB 网卡数据组装成 pbuf</p></li>
|
||
<li><p>实际网卡发送和接收处理</p></li>
|
||
</ul>
|
||
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="k">static</span><span class="w"> </span><span class="n">err_t</span><span class="w"> </span><span class="nf">usbh_cdc_ecm_linkoutput</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">netif</span><span class="w"> </span><span class="o">*</span><span class="n">netif</span><span class="p">,</span><span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="nc">pbuf</span><span class="w"> </span><span class="o">*</span><span class="n">p</span><span class="p">)</span>
|
||
<span class="p">{</span>
|
||
<span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">ret</span><span class="p">;</span>
|
||
<span class="w"> </span><span class="p">(</span><span class="kt">void</span><span class="p">)</span><span class="n">netif</span><span class="p">;</span>
|
||
|
||
<span class="w"> </span><span class="n">usbh_lwip_eth_output_common</span><span class="p">(</span><span class="n">p</span><span class="p">,</span><span class="w"> </span><span class="n">usbh_cdc_ecm_get_eth_txbuf</span><span class="p">());</span>
|
||
<span class="w"> </span><span class="n">ret</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">usbh_cdc_ecm_eth_output</span><span class="p">(</span><span class="n">p</span><span class="o">-></span><span class="n">tot_len</span><span class="p">);</span>
|
||
<span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">ret</span><span class="w"> </span><span class="o"><</span><span class="w"> </span><span class="mi">0</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
|
||
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">ERR_BUF</span><span class="p">;</span>
|
||
<span class="w"> </span><span class="p">}</span><span class="w"> </span><span class="k">else</span><span class="w"> </span><span class="p">{</span>
|
||
<span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">ERR_OK</span><span class="p">;</span>
|
||
<span class="w"> </span><span class="p">}</span>
|
||
<span class="p">}</span>
|
||
|
||
<span class="kt">void</span><span class="w"> </span><span class="nf">usbh_cdc_ecm_eth_input</span><span class="p">(</span><span class="kt">uint8_t</span><span class="w"> </span><span class="o">*</span><span class="n">buf</span><span class="p">,</span><span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">buflen</span><span class="p">)</span>
|
||
<span class="p">{</span>
|
||
<span class="w"> </span><span class="n">usbh_lwip_eth_input_common</span><span class="p">(</span><span class="o">&</span><span class="n">g_cdc_ecm_netif</span><span class="p">,</span><span class="w"> </span><span class="n">buf</span><span class="p">,</span><span class="w"> </span><span class="n">buflen</span><span class="p">);</span>
|
||
<span class="p">}</span>
|
||
</pre></div>
|
||
</div>
|
||
<ul class="simple">
|
||
<li><p>USB 网卡 拔出以后会 <strong>自动</strong> 调用 <cite>usbh_xxx_stop</cite> 函数，此时需要停止 DHCP 客户端，删除定时器，并且移除 netif。</p></li>
|
||
</ul>
|
||
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">void</span><span class="w"> </span><span class="nf">usbh_cdc_ecm_stop</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_cdc_ecm</span><span class="w"> </span><span class="o">*</span><span class="n">cdc_ecm_class</span><span class="p">)</span>
|
||
<span class="p">{</span>
|
||
<span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="nc">netif</span><span class="w"> </span><span class="o">*</span><span class="n">netif</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="o">&</span><span class="n">g_cdc_ecm_netif</span><span class="p">;</span>
|
||
<span class="w"> </span><span class="p">(</span><span class="kt">void</span><span class="p">)</span><span class="n">cdc_ecm_class</span><span class="p">;</span>
|
||
|
||
<span class="cp">#if LWIP_DHCP</span>
|
||
<span class="w"> </span><span class="n">dhcp_stop</span><span class="p">(</span><span class="n">netif</span><span class="p">);</span>
|
||
<span class="w"> </span><span class="n">dhcp_cleanup</span><span class="p">(</span><span class="n">netif</span><span class="p">);</span>
|
||
<span class="w"> </span><span class="n">usb_osal_timer_delete</span><span class="p">(</span><span class="n">dhcp_handle</span><span class="p">);</span>
|
||
<span class="cp">#endif</span>
|
||
<span class="w"> </span><span class="n">netif_set_down</span><span class="p">(</span><span class="n">netif</span><span class="p">);</span>
|
||
<span class="w"> </span><span class="n">netif_remove</span><span class="p">(</span><span class="n">netif</span><span class="p">);</span>
|
||
<span class="p">}</span>
|
||
</pre></div>
|
||
</div>
|
||
<ul class="simple">
|
||
<li><p>因为 USB 网卡内部已经对接了LWIP，因此用户可以直接使用 LWIP 的 API，无需关心 USB 的实现。</p></li>
|
||
</ul>
|
||
</section>
|
||
<section id="usb-lwip">
|
||
<h2>USB 网卡 LWIP 配置宏相关注意事项<a class="headerlink" href="#usb-lwip" title="Link to this heading"></a></h2>
|
||
<p><strong>LWIP_TCPIP_CORE_LOCKING_INPUT</strong> 用于不使用 lwip 内置的 tcpip 线程，而使用 USB 自己的接收处理线程。</p>
|
||
<p><strong>LWIP_TCPIP_CORE_LOCKING</strong> 在现在 lwip 版本中默认是打开的，也推荐必须打开。</p>
|
||
<p><strong>PBUF_POOL_BUFSIZE</strong> 推荐大于1600，搭配 LWIP_TCPIP_CORE_LOCKING_INPUT 使用，因为我们提供了使用 zero mempy 的方式，使用静态 pbuf，而不是把数据 copy 到 pbuf 中。</p>
|
||
<p><strong>TCPIP_THREAD_STACKSIZE</strong> 推荐大于 1K，防止栈溢出。</p>
|
||
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="cp">#if LWIP_TCPIP_CORE_LOCKING_INPUT != 1</span>
|
||
<span class="cp">#warning suggest you to set LWIP_TCPIP_CORE_LOCKING_INPUT to 1, usb handles eth input with own thread</span>
|
||
<span class="cp">#endif</span>
|
||
|
||
<span class="cp">#if LWIP_TCPIP_CORE_LOCKING != 1</span>
|
||
<span class="cp">#error must set LWIP_TCPIP_CORE_LOCKING to 1</span>
|
||
<span class="cp">#endif</span>
|
||
|
||
<span class="cp">#if PBUF_POOL_BUFSIZE < 1600</span>
|
||
<span class="cp">#error PBUF_POOL_BUFSIZE must be larger than 1600</span>
|
||
<span class="cp">#endif</span>
|
||
|
||
<span class="cp">#if TCPIP_THREAD_STACKSIZE < 1024</span>
|
||
<span class="cp">#error TCPIP_THREAD_STACKSIZE must be >= 1024</span>
|
||
<span class="cp">#endif</span>
|
||
</pre></div>
|
||
</div>
|
||
<ul class="simple">
|
||
<li><p>具体移植文章可以参考开发者的一些笔记 <a class="reference external" href="https://club.rt-thread.org/ask/article/5cf3e9e0b2d95800.html">https://club.rt-thread.org/ask/article/5cf3e9e0b2d95800.html</a></p></li>
|
||
</ul>
|
||
</section>
|
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|
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|
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|
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