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<p class="caption" role="heading"><span class="caption-text">USBIP 介绍</span></p>
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<li class="toctree-l1"><a class="reference internal" href="../usbip/ohci.html">OHCI</a></li>
<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/fotg210.html">FOTG210</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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  <section id="id1">
<h1>主机协议栈<a class="headerlink" href="#id1" title="Link to this heading"></a></h1>
<p>关于主机协议栈中结构体的命名、分类、成员组成，参考下面这两张图：</p>
<figure class="align-default">
<img alt="../_images/api_host1.png" src="../_images/api_host1.png" />
</figure>
<figure class="align-default">
<img alt="../_images/api_host2.png" src="../_images/api_host2.png" />
</figure>
<section id="core">
<h2>CORE<a class="headerlink" href="#core" title="Link to this heading"></a></h2>
<section id="class">
<h3>CLASS 驱动信息结构体<a class="headerlink" href="#class" title="Link to this heading"></a></h3>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_class_info</span><span class="w"> </span><span class="p">{</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">match_flags</span><span class="p">;</span><span class="w">           </span><span class="cm">/* Used for product specific matches; range is inclusive */</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">bInterfaceClass</span><span class="p">;</span><span class="w">       </span><span class="cm">/* Base device class code */</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">bInterfaceSubClass</span><span class="p">;</span><span class="w">    </span><span class="cm">/* Sub-class, depends on base class. Eg. */</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">bInterfaceProtocol</span><span class="p">;</span><span class="w">    </span><span class="cm">/* Protocol, depends on base class. Eg. */</span>
<span class="w">    </span><span class="k">const</span><span class="w"> </span><span class="kt">uint16_t</span><span class="w"> </span><span class="p">(</span><span class="o">*</span><span class="n">id_table</span><span class="p">)[</span><span class="mi">2</span><span class="p">];</span><span class="w"> </span><span class="cm">/* List of Vendor/Product ID pairs */</span>
<span class="w">    </span><span class="k">const</span><span class="w"> </span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_class_driver</span><span class="w"> </span><span class="o">*</span><span class="n">class_driver</span><span class="p">;</span>
<span class="p">};</span>
</pre></div>
</div>
</section>
<section id="id2">
<h3>端点结构体<a class="headerlink" href="#id2" title="Link to this heading"></a></h3>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_endpoint</span><span class="w"> </span><span class="p">{</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usb_endpoint_descriptor</span><span class="w"> </span><span class="n">ep_desc</span><span class="p">;</span>
<span class="p">};</span>
</pre></div>
</div>
</section>
<section id="id3">
<h3>接口备用结构体<a class="headerlink" href="#id3" title="Link to this heading"></a></h3>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_interface_altsetting</span><span class="w"> </span><span class="p">{</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usb_interface_descriptor</span><span class="w"> </span><span class="n">intf_desc</span><span class="p">;</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_endpoint</span><span class="w"> </span><span class="n">ep</span><span class="p">[</span><span class="n">CONFIG_USBHOST_MAX_ENDPOINTS</span><span class="p">];</span>
<span class="p">};</span>
</pre></div>
</div>
</section>
<section id="id4">
<h3>接口结构体<a class="headerlink" href="#id4" title="Link to this heading"></a></h3>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_interface</span><span class="w"> </span><span class="p">{</span>
<span class="w">    </span><span class="kt">char</span><span class="w"> </span><span class="n">devname</span><span class="p">[</span><span class="n">CONFIG_USBHOST_DEV_NAMELEN</span><span class="p">];</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_class_driver</span><span class="w"> </span><span class="o">*</span><span class="n">class_driver</span><span class="p">;</span>
<span class="w">    </span><span class="kt">void</span><span class="w"> </span><span class="o">*</span><span class="n">priv</span><span class="p">;</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_interface_altsetting</span><span class="w"> </span><span class="n">altsetting</span><span class="p">[</span><span class="n">CONFIG_USBHOST_MAX_INTF_ALTSETTINGS</span><span class="p">];</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">altsetting_num</span><span class="p">;</span>
<span class="p">};</span>
</pre></div>
</div>
</section>
<section id="id5">
<h3>配置结构体<a class="headerlink" href="#id5" title="Link to this heading"></a></h3>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_configuration</span><span class="w"> </span><span class="p">{</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usb_configuration_descriptor</span><span class="w"> </span><span class="n">config_desc</span><span class="p">;</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_interface</span><span class="w"> </span><span class="n">intf</span><span class="p">[</span><span class="n">CONFIG_USBHOST_MAX_INTERFACES</span><span class="p">];</span>
<span class="p">};</span>
</pre></div>
</div>
</section>
<section id="hubport">
<h3>hubport 结构体<a class="headerlink" href="#hubport" title="Link to this heading"></a></h3>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_hubport</span><span class="w"> </span><span class="p">{</span>
<span class="w">    </span><span class="kt">bool</span><span class="w"> </span><span class="n">connected</span><span class="p">;</span><span class="w">   </span><span class="cm">/* True: device connected; false: disconnected */</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">port</span><span class="p">;</span><span class="w">     </span><span class="cm">/* Hub port index */</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">dev_addr</span><span class="p">;</span><span class="w"> </span><span class="cm">/* device address */</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">speed</span><span class="p">;</span><span class="w">    </span><span class="cm">/* device speed */</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">depth</span><span class="p">;</span><span class="w">    </span><span class="cm">/* distance from root hub */</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">route</span><span class="p">;</span><span class="w">    </span><span class="cm">/* route string */</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">slot_id</span><span class="p">;</span><span class="w">  </span><span class="cm">/* slot id */</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usb_device_descriptor</span><span class="w"> </span><span class="n">device_desc</span><span class="p">;</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_configuration</span><span class="w"> </span><span class="n">config</span><span class="p">;</span>
<span class="w">    </span><span class="k">const</span><span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">iManufacturer</span><span class="p">;</span>
<span class="w">    </span><span class="k">const</span><span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">iProduct</span><span class="p">;</span>
<span class="w">    </span><span class="k">const</span><span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">iSerialNumber</span><span class="p">;</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="o">*</span><span class="n">raw_config_desc</span><span class="p">;</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usb_setup_packet</span><span class="w"> </span><span class="o">*</span><span class="n">setup</span><span class="p">;</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_hub</span><span class="w"> </span><span class="o">*</span><span class="n">parent</span><span class="p">;</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_hub</span><span class="w"> </span><span class="o">*</span><span class="n">self</span><span class="p">;</span><span class="w"> </span><span class="cm">/* if this hubport is a hub */</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_bus</span><span class="w"> </span><span class="o">*</span><span class="n">bus</span><span class="p">;</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usb_endpoint_descriptor</span><span class="w"> </span><span class="n">ep0</span><span class="p">;</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_urb</span><span class="w"> </span><span class="n">ep0_urb</span><span class="p">;</span>
<span class="w">    </span><span class="n">usb_osal_mutex_t</span><span class="w"> </span><span class="n">mutex</span><span class="p">;</span>
<span class="p">};</span>
</pre></div>
</div>
</section>
<section id="hub">
<h3>hub 结构体<a class="headerlink" href="#hub" title="Link to this heading"></a></h3>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_hub</span><span class="w"> </span><span class="p">{</span>
<span class="w">    </span><span class="kt">bool</span><span class="w"> </span><span class="n">connected</span><span class="p">;</span>
<span class="w">    </span><span class="kt">bool</span><span class="w"> </span><span class="n">is_roothub</span><span class="p">;</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">index</span><span class="p">;</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">hub_addr</span><span class="p">;</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">speed</span><span class="p">;</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">nports</span><span class="p">;</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">powerdelay</span><span class="p">;</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">tt_think</span><span class="p">;</span>
<span class="w">    </span><span class="kt">bool</span><span class="w"> </span><span class="n">ismtt</span><span class="p">;</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usb_hub_descriptor</span><span class="w"> </span><span class="n">hub_desc</span><span class="p">;</span><span class="w"> </span><span class="cm">/* USB 2.0 only */</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usb_hub_ss_descriptor</span><span class="w"> </span><span class="n">hub_ss_desc</span><span class="p">;</span><span class="w"> </span><span class="cm">/* USB 3.0 only */</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_hubport</span><span class="w"> </span><span class="n">child</span><span class="p">[</span><span class="n">CONFIG_USBHOST_MAX_EHPORTS</span><span class="p">];</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_hubport</span><span class="w"> </span><span class="o">*</span><span class="n">parent</span><span class="p">;</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_bus</span><span class="w"> </span><span class="o">*</span><span class="n">bus</span><span class="p">;</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usb_endpoint_descriptor</span><span class="w"> </span><span class="o">*</span><span class="n">intin</span><span class="p">;</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_urb</span><span class="w"> </span><span class="n">intin_urb</span><span class="p">;</span>
<span class="w">    </span><span class="kt">uint8_t</span><span class="w"> </span><span class="o">*</span><span class="n">int_buffer</span><span class="p">;</span>
<span class="w">    </span><span class="k">struct</span><span class="w"> </span><span class="nc">usb_osal_timer</span><span class="w"> </span><span class="o">*</span><span class="n">int_timer</span><span class="p">;</span>
<span class="p">};</span>
</pre></div>
</div>
</section>
<section id="usbh-initialize">
<h3>usbh_initialize<a class="headerlink" href="#usbh-initialize" title="Link to this heading"></a></h3>
<p><code class="docutils literal notranslate"><span class="pre">usbh_initialize</span></code> 用来初始化 usb 主机协议栈，包括：初始化 usb 主机控制器，创建 roothub 设备，创建 hub 检测线程。</p>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">int</span><span class="w"> </span><span class="nf">usbh_initialize</span><span class="p">(</span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">busid</span><span class="p">,</span><span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">reg_base</span><span class="p">,</span><span class="w"> </span><span class="n">usbh_event_handler_t</span><span class="w"> </span><span class="n">event_handler</span><span class="p">);</span>
</pre></div>
</div>
<ul class="simple">
<li><p><strong>busid</strong>  bus id，从 0开始，不能超过 <cite>CONFIG_USBHOST_MAX_BUS</cite></p></li>
<li><p><strong>reg_base</strong>  hcd 寄存器基地址</p></li>
<li><p><strong>event_handler</strong>  host 事件回调函数，可以为NULL</p></li>
<li><p><strong>return</strong>  0 表示正常其他表示错误</p></li>
</ul>
</section>
<section id="usbh-find-class-instance">
<h3>usbh_find_class_instance<a class="headerlink" href="#usbh-find-class-instance" title="Link to this heading"></a></h3>
<p><code class="docutils literal notranslate"><span class="pre">usbh_find_class_instance</span></code> 根据注册的 class 名称查找对应的 class 结构体句柄。</p>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">void</span><span class="w"> </span><span class="o">*</span><span class="nf">usbh_find_class_instance</span><span class="p">(</span><span class="k">const</span><span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">devname</span><span class="p">);</span>
</pre></div>
</div>
<ul class="simple">
<li><p><strong>devname</strong>  class 名称</p></li>
<li><p><strong>return</strong>  class 结构体句柄</p></li>
</ul>
</section>
<section id="lsusb">
<h3>lsusb<a class="headerlink" href="#lsusb" title="Link to this heading"></a></h3>
<p><code class="docutils literal notranslate"><span class="pre">lsusb</span></code> 用来查看和操作 hub 上的设备信息。需要借助 shell 插件使用。</p>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">int</span><span class="w"> </span><span class="nf">lsusb</span><span class="p">(</span><span class="kt">int</span><span class="w"> </span><span class="n">argc</span><span class="p">,</span><span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">**</span><span class="n">argv</span><span class="p">);</span>
</pre></div>
</div>
</section>
</section>
<section id="serial">
<h2>SERIAL<a class="headerlink" href="#serial" title="Link to this heading"></a></h2>
<section id="usbh-serial-open">
<h3>usbh_serial_open<a class="headerlink" href="#usbh-serial-open" title="Link to this heading"></a></h3>
<p><code class="docutils literal notranslate"><span class="pre">usbh_serial_open</span></code> 根据路径打开一个串口设备。</p>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_serial</span><span class="w"> </span><span class="o">*</span><span class="n">usbh_serial_open</span><span class="p">(</span><span class="k">const</span><span class="w"> </span><span class="kt">char</span><span class="w"> </span><span class="o">*</span><span class="n">devname</span><span class="p">,</span><span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">open_flags</span><span class="p">);</span>
</pre></div>
</div>
<ul class="simple">
<li><p><strong>devname</strong>  串口路径</p></li>
<li><p><strong>open_flags</strong>  打开标志，参考 <cite>USBH_SERIAL_OFLAG_*</cite> 定义</p></li>
<li><p><strong>return</strong>  serial 结构体句柄</p></li>
</ul>
</section>
<section id="usbh-serial-close">
<h3>usbh_serial_close<a class="headerlink" href="#usbh-serial-close" title="Link to this heading"></a></h3>
<p><code class="docutils literal notranslate"><span class="pre">usbh_serial_close</span></code> 关闭串口设备。</p>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">void</span><span class="w"> </span><span class="nf">usbh_serial_close</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_serial</span><span class="w"> </span><span class="o">*</span><span class="n">serial</span><span class="p">);</span>
</pre></div>
</div>
<ul class="simple">
<li><p><strong>serial</strong>  serial 结构体句柄</p></li>
</ul>
</section>
<section id="usbh-serial-control">
<h3>usbh_serial_control<a class="headerlink" href="#usbh-serial-control" title="Link to this heading"></a></h3>
<p><code class="docutils literal notranslate"><span class="pre">usbh_serial_control</span></code> 对串口进行配置。</p>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">int</span><span class="w"> </span><span class="nf">usbh_serial_control</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_serial</span><span class="w"> </span><span class="o">*</span><span class="n">serial</span><span class="p">,</span><span class="w"> </span><span class="kt">int</span><span class="w"> </span><span class="n">cmd</span><span class="p">,</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="o">*</span><span class="n">arg</span><span class="p">);</span>
</pre></div>
</div>
<ul class="simple">
<li><p><strong>serial</strong>  serial 结构体句柄</p></li>
<li><p><strong>cmd</strong>  控制命令，参考 <cite>USBH_SERIAL_CMD_*</cite> 定义</p></li>
<li><p><strong>arg</strong>  控制参数指针</p></li>
<li><p><strong>return</strong>  0 表示正常其他表示错误</p></li>
</ul>
</section>
<section id="usbh-serial-write">
<h3>usbh_serial_write<a class="headerlink" href="#usbh-serial-write" title="Link to this heading"></a></h3>
<p><code class="docutils literal notranslate"><span class="pre">usbh_serial_write</span></code> 向串口写数据。</p>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">int</span><span class="w"> </span><span class="nf">usbh_serial_write</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_serial</span><span class="w"> </span><span class="o">*</span><span class="n">serial</span><span class="p">,</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="o">*</span><span class="n">buffer</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>
</pre></div>
</div>
<ul class="simple">
<li><p><strong>serial</strong>  serial 结构体句柄</p></li>
<li><p><strong>buffer</strong>  数据缓冲区指针</p></li>
<li><p><strong>buflen</strong>  要写入的数据长度</p></li>
<li><p><strong>return</strong>  实际写入的数据长度或者错误码</p></li>
</ul>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>如果没有开启 CONFIG_USB_DCACHE_ENABLE，则 buffer 需要是 nocache区域，否则需要是对齐到 CONFIG_USB_ALIGN_SIZE 的区域。</p>
</div>
</section>
<section id="usbh-serial-read">
<h3>usbh_serial_read<a class="headerlink" href="#usbh-serial-read" title="Link to this heading"></a></h3>
<p><code class="docutils literal notranslate"><span class="pre">usbh_serial_read</span></code> 从串口读数据。 <a href="#id6"><span class="problematic" id="id7">**</span></a>如果没有设置波特率，不允许使用该 API，设置波特率后，内部会开启 rx 接收并将数据写入 ringbuf <a href="#id8"><span class="problematic" id="id9">**</span></a>。</p>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">int</span><span class="w"> </span><span class="nf">usbh_serial_read</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_serial</span><span class="w"> </span><span class="o">*</span><span class="n">serial</span><span class="p">,</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="o">*</span><span class="n">buffer</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>
</pre></div>
</div>
<ul class="simple">
<li><p><strong>serial</strong>  serial 结构体句柄</p></li>
<li><p><strong>buffer</strong>  数据缓冲区指针</p></li>
<li><p><strong>buflen</strong>  要读取的最大数据长度</p></li>
<li><p><strong>return</strong>  实际读取的数据长度或者错误码</p></li>
</ul>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>由于内部使用了 ringbuffer，对于用户的 buffer 属性没有限制。</p>
</div>
</section>
<section id="usbh-serial-cdc-write-async">
<h3>usbh_serial_cdc_write_async<a class="headerlink" href="#usbh-serial-cdc-write-async" title="Link to this heading"></a></h3>
<p><code class="docutils literal notranslate"><span class="pre">usbh_serial_cdc_write_async</span></code> 异步从串口读数据。 <strong>如果设置了波特率，不允许使用该 API</strong>。</p>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">int</span><span class="w"> </span><span class="nf">usbh_serial_cdc_write_async</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_serial</span><span class="w"> </span><span class="o">*</span><span class="n">serial</span><span class="p">,</span><span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="o">*</span><span class="n">buffer</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="w"> </span><span class="n">usbh_complete_callback_t</span><span class="w"> </span><span class="n">complete</span><span class="p">,</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="o">*</span><span class="n">arg</span><span class="p">);</span>
</pre></div>
</div>
<ul class="simple">
<li><p><strong>serial</strong>  serial 结构体句柄</p></li>
<li><p><strong>buffer</strong>  数据缓冲区指针</p></li>
<li><p><strong>buflen</strong>  要发送的数据长度</p></li>
<li><p><strong>complete</strong>  读数据完成回调函数</p></li>
<li><p><strong>arg</strong>  回调函数参数</p></li>
<li><p><strong>return</strong>  0 表示正常其他表示错误</p></li>
</ul>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>如果没有开启 CONFIG_USB_DCACHE_ENABLE，则 buffer 需要是 nocache区域，否则需要是对齐到 CONFIG_USB_ALIGN_SIZE 的区域。</p>
</div>
</section>
<section id="usbh-serial-cdc-read-async">
<h3>usbh_serial_cdc_read_async<a class="headerlink" href="#usbh-serial-cdc-read-async" title="Link to this heading"></a></h3>
<p><code class="docutils literal notranslate"><span class="pre">usbh_serial_cdc_read_async</span></code> 异步从串口读数据。 <a href="#id10"><span class="problematic" id="id11">**</span></a>如果设置了波特率，不允许使用该 API，设置波特率后，内部会开启 rx 接收并将数据写入 ringbuf <a href="#id12"><span class="problematic" id="id13">**</span></a>。</p>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">int</span><span class="w"> </span><span class="nf">usbh_serial_cdc_read_async</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_serial</span><span class="w"> </span><span class="o">*</span><span class="n">serial</span><span class="p">,</span><span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="o">*</span><span class="n">buffer</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="w"> </span><span class="n">usbh_complete_callback_t</span><span class="w"> </span><span class="n">complete</span><span class="p">,</span><span class="w"> </span><span class="kt">void</span><span class="w"> </span><span class="o">*</span><span class="n">arg</span><span class="p">);</span>
</pre></div>
</div>
<ul class="simple">
<li><p><strong>serial</strong>  serial 结构体句柄</p></li>
<li><p><strong>buffer</strong>  数据缓冲区指针</p></li>
<li><p><strong>buflen</strong>  要读取的最大数据长度，一次最高 16K。并且需要是 wMaxPacketSize 的整数倍</p></li>
<li><p><strong>complete</strong>  读数据完成回调函数</p></li>
<li><p><strong>arg</strong>  回调函数参数</p></li>
<li><p><strong>return</strong>  0 表示正常其他表示错误</p></li>
</ul>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>如果没有开启 CONFIG_USB_DCACHE_ENABLE，则 buffer 需要是 nocache区域，否则需要是对齐到 CONFIG_USB_ALIGN_SIZE 的区域。</p>
</div>
</section>
</section>
<section id="hid">
<h2>HID<a class="headerlink" href="#hid" title="Link to this heading"></a></h2>
</section>
<section id="msc">
<h2>MSC<a class="headerlink" href="#msc" title="Link to this heading"></a></h2>
<section id="usbh-msc-scsi-init">
<h3>usbh_msc_scsi_init<a class="headerlink" href="#usbh-msc-scsi-init" title="Link to this heading"></a></h3>
<p><code class="docutils literal notranslate"><span class="pre">usbh_msc_scsi_init</span></code> 初始化 msc scsi 设备。获取 MSC 状态和容量信息。</p>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">int</span><span class="w"> </span><span class="nf">usbh_msc_scsi_init</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_msc</span><span class="w"> </span><span class="o">*</span><span class="n">msc_class</span><span class="p">);</span>
</pre></div>
</div>
<ul class="simple">
<li><p><strong>msc_class</strong>  msc 结构体句柄</p></li>
<li><p><strong>return</strong>  0 表示正常其他表示错误</p></li>
</ul>
</section>
<section id="usbh-msc-scsi-write10">
<h3>usbh_msc_scsi_write10<a class="headerlink" href="#usbh-msc-scsi-write10" title="Link to this heading"></a></h3>
<p><code class="docutils literal notranslate"><span class="pre">usbh_msc_scsi_write10</span></code> 向 msc 设备写数据。</p>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">int</span><span class="w"> </span><span class="nf">usbh_msc_scsi_write10</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_msc</span><span class="w"> </span><span class="o">*</span><span class="n">msc_class</span><span class="p">,</span><span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">start_sector</span><span class="p">,</span><span class="w"> </span><span class="k">const</span><span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="o">*</span><span class="n">buffer</span><span class="p">,</span><span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">nsectors</span><span class="p">);</span>
</pre></div>
</div>
<ul class="simple">
<li><p><strong>msc_class</strong>  msc 结构体句柄</p></li>
<li><p><strong>start_sector</strong>  起始扇区</p></li>
<li><p><strong>buffer</strong>  数据缓冲区指针</p></li>
<li><p><strong>nsectors</strong>  要写入的扇区数</p></li>
<li><p><strong>return</strong>  返回 0 表示正常其他表示错误</p></li>
</ul>
</section>
<section id="usbh-msc-scsi-read10">
<h3>usbh_msc_scsi_read10<a class="headerlink" href="#usbh-msc-scsi-read10" title="Link to this heading"></a></h3>
<p><code class="docutils literal notranslate"><span class="pre">usbh_msc_scsi_read10</span></code> 从 msc 设备读数据。</p>
<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="kt">int</span><span class="w"> </span><span class="nf">usbh_msc_scsi_read10</span><span class="p">(</span><span class="k">struct</span><span class="w"> </span><span class="nc">usbh_msc</span><span class="w"> </span><span class="o">*</span><span class="n">msc_class</span><span class="p">,</span><span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">start_sector</span><span class="p">,</span><span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="o">*</span><span class="n">buffer</span><span class="p">,</span><span class="w"> </span><span class="kt">uint32_t</span><span class="w"> </span><span class="n">nsectors</span><span class="p">);</span>
</pre></div>
</div>
<ul class="simple">
<li><p><strong>msc_class</strong>  msc 结构体句柄</p></li>
<li><p><strong>start_sector</strong>  起始扇区</p></li>
<li><p><strong>buffer</strong>  数据缓冲区指针</p></li>
<li><p><strong>nsectors</strong>  要读取的扇区数</p></li>
<li><p><strong>return</strong>  返回 0 表示正常其他表示错误</p></li>
</ul>
</section>
</section>
<section id="network">
<h2>NETWORK<a class="headerlink" href="#network" title="Link to this heading"></a></h2>
<p>已对接 lwIP 协议栈或者其他网络协议栈，使用 socket API 即可。</p>
</section>
</section>


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