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294 lines
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<li class="toctree-l1"><a class="reference internal" href="quick_start/transplant.html">芯片通用移植指南</a></li>
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<li class="toctree-l1"><a class="reference internal" href="quick_start/rtthread.html">基于 RT-Thread 软件包开发指南</a></li>
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<li class="toctree-l1"><a class="reference internal" href="quick_start/esp.html">基于 ESP-Registry 开发指南</a></li>
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<li class="toctree-l1 current"><a class="current reference internal" href="#">Q & A</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="#id1">移植提问模板</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#id2">其余问题提问模板</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#cherryusb">CherryUSB 性能能到多少</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#st-ip">ST IP 命名问题</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#gd-ip">GD IP 问题</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#ep-addr-xxx-overflow">Ep addr XXX overflow</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#this-dwc2-version-does-not-support-dma-mode-so-stop-working">This dwc2 version does not support dma mode, so stop working</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#has-include">__has_include 报错</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#config-usb-hs">CONFIG_USB_HS 何时使用</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#failed-to-enable-port">Failed to enable port</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#usb-host-urb-12-14">移植 usb host 出现 urb 返回 -12/-14</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#usb-err-nak">USB_ERR_NAK 说明</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#usb-host-usb">USB host 连接 USB 网卡问题</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#pc-com">PC 识别的 COM 口如何更改名称</a></li>
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<li class="toctree-l2"><a class="reference internal" href="#connect-disconnect-event">connect 和 disconnect event 不触发</a></li>
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</ul>
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<li class="toctree-l1"><a class="reference internal" href="opensource.html">官方开源项目分享</a></li>
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</ul>
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<p class="caption" role="heading"><span class="caption-text">USB 基本知识点</span></p>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="usb/usb2.0_basic.html">USB 基本概念(2.0 为主)</a></li>
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<li class="toctree-l1"><a class="reference internal" href="usb/usb3.0_basic.html">USB 基本概念(3.0 为主)</a></li>
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<li class="toctree-l1"><a class="reference internal" href="usb/usb_desc.html">USB 描述符</a></li>
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<li class="toctree-l1"><a class="reference internal" href="usb/usb_request.html">USB 设备请求</a></li>
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<li class="toctree-l1"><a class="reference internal" href="usb/usb_enum.html">USB 枚举</a></li>
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<li class="toctree-l1"><a class="reference internal" href="usb/usb_ext.html">USB 知识点拓展</a></li>
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</ul>
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<p class="caption" role="heading"><span class="caption-text">API 手册</span></p>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="api/api_device.html">设备协议栈</a></li>
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<li class="toctree-l1"><a class="reference internal" href="api/api_port.html">主从驱动</a></li>
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<li class="toctree-l1"><a class="reference internal" href="api/api_config.html">USB CONFIG 说明</a></li>
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</ul>
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<p class="caption" role="heading"><span class="caption-text">Class 指南</span></p>
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<ul>
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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_hid.html">HID</a></li>
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<li class="toctree-l1"><a class="reference internal" href="class/class_msc.html">MSC</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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<li class="toctree-l1"><a class="reference internal" href="class/winusb.html">WINUSB</a></li>
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</ul>
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<p class="caption" role="heading"><span class="caption-text">例程说明</span></p>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbd_cdc_acm.html">usbd_cdc_acm</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbd_hid.html">usbd_hid</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbd_msc.html">usbd_msc</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbd_rndis.html">usbd_rndis</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbd_ecm.html">usbd_cdc_ecm</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbd_audiov1.html">usbd_audiov1</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbd_audiov2.html">usbd_audiov2</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbd_video.html">usbd_video</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbd_winusb.html">usbd_winusb</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbd_webusb.html">usbd_webusb</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbd_adb.html">usbd_adb</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbh_serial.html">usbh_serial</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbh_hid.html">usbh_hid</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbh_msc.html">usbh_msc</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbh_net.html">usbh_net</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbh_bluetooth.html">usbh_bluetooth</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbh_wifi.html">usbh_wifi</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbd_vendor.html">vendor device 驱动编写</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/usbh_vendor.html">vendor host 驱动编写</a></li>
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<li class="toctree-l1"><a class="reference internal" href="demo/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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</ul>
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<p class="caption" role="heading"><span class="caption-text">版本说明</span></p>
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<ul>
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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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</ul>
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<p class="caption" role="heading"><span class="caption-text">性能展示</span></p>
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<ul>
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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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</ul>
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<p class="caption" role="heading"><span class="caption-text">商业支持</span></p>
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<ul>
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<li class="toctree-l1"><a class="reference internal" href="support/index.html">商业支持</a></li>
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<a href="index.html">CherryUSB</a>
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</nav>
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<div class="rst-content">
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<li class="breadcrumb-item active">Q & A</li>
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<div itemprop="articleBody">
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<section id="q-a">
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<h1>Q & A<a class="headerlink" href="#q-a" title="Link to this heading"></a></h1>
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<section id="id1">
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<h2>移植提问模板<a class="headerlink" href="#id1" title="Link to this heading"></a></h2>
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<p>请在下列途径提交问题：
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- RT-Thread 官方论坛: <a class="reference external" href="https://club.rt-thread.org/ask/tag/5f5f851966917b14.html">https://club.rt-thread.org/ask/tag/5f5f851966917b14.html</a>
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- Github issue: <a class="reference external" href="https://github.com/cherry-embedded/CherryUSB/issues/new/choose">https://github.com/cherry-embedded/CherryUSB/issues/new/choose</a></p>
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<p>提问中请包含以下信息：</p>
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<ul class="simple">
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<li><p>使用的版本</p></li>
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<li><p>使用的板子，引脚，USB IP</p></li>
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<li><p>是否配置 USB 中断，USB 时钟，USB 引脚，USB phy 配置，以及 USB 寄存器地址是否正确，截图</p></li>
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<li><p>是否能进 USB 中断</p></li>
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<li><p>芯片是否带有 cache功能，是否做了 no cache 处理，截图</p></li>
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<li><p>USB 电路是否画正确，是否使用杜邦线连接，是否直连，如果正常，请说明正常原因</p></li>
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<li><p>如果能进中断，配置 <strong>#define CONFIG_USB_DBG_LEVEL USB_DBG_LOG</strong> 并提供 log，仅限商业 IP, 其余 IP 禁止开启 log，否则无法枚举</p></li>
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<li><p>是否流片并销售</p></li>
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</ul>
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</section>
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<section id="id2">
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<h2>其余问题提问模板<a class="headerlink" href="#id2" title="Link to this heading"></a></h2>
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<p>具体说明现象，复现方式，使用我提供的 demo 再测试，以及提供完整 log</p>
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</section>
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<section id="cherryusb">
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<h2>CherryUSB 性能能到多少<a class="headerlink" href="#cherryusb" title="Link to this heading"></a></h2>
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<p>参考 <a class="reference internal" href="show/index.html#performace-show"><span class="std std-ref">性能展示</span></a></p>
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</section>
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<section id="st-ip">
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<h2>ST IP 命名问题<a class="headerlink" href="#st-ip" title="Link to this heading"></a></h2>
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<p>ST 命名为 USB_OTG_FS, USB_OTG_HS，并不是说明本身是高速或者全速，只是代表可以支持到高速，但是本身都是全速，需要外挂高速phy。因此，提问禁止说这两个词，请使用 USB0(PA11/PA12),USB1(PB14/PB15) 代替。其余国产厂家同理。</p>
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</section>
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<section id="gd-ip">
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<h2>GD IP 问题<a class="headerlink" href="#gd-ip" title="Link to this heading"></a></h2>
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<p>GD IP 采用 DWC2，但是读取的硬件参数都是 0（我也不懂为什么不给人知道），因此需要用户自行知道硬件信息，从 1.5.0 开始由于需要读取硬件信息，因此无法直接使用。</p>
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<p>其次 GD 复位以后无法使用 EPDIS 功能关闭端点，需要用户删除 reset 中断中的以下代码：</p>
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<div class="highlight-C notranslate"><div class="highlight"><pre><span></span><span class="n">USB_OTG_INEP</span><span class="p">(</span><span class="n">i</span><span class="p">)</span><span class="o">-></span><span class="n">DIEPCTL</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="n">USB_OTG_DIEPCTL_EPDIS</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">USB_OTG_DIEPCTL_SNAK</span><span class="p">);</span>
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<span class="n">USB_OTG_OUTEP</span><span class="p">(</span><span class="n">i</span><span class="p">)</span><span class="o">-></span><span class="n">DOEPCTL</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">(</span><span class="n">USB_OTG_DOEPCTL_EPDIS</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">USB_OTG_DOEPCTL_SNAK</span><span class="p">);</span>
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</pre></div>
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</div>
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</section>
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<section id="ep-addr-xxx-overflow">
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<h2>Ep addr XXX overflow<a class="headerlink" href="#ep-addr-xxx-overflow" title="Link to this heading"></a></h2>
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<p>该 IP 硬件上没有这么多端点, 请更换 IP or 减少端点使用。并且默认 demo 不做双向功能，考虑到不是所有的 IP 都支持，因此默认是 81 02 这样的而不是 81 01，
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如果支持，自行修改。某些 IP 双向端点可能会占用相同的硬件信息，不一定能同时使用，自行检查。</p>
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</section>
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<section id="this-dwc2-version-does-not-support-dma-mode-so-stop-working">
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<h2>This dwc2 version does not support dma mode, so stop working<a class="headerlink" href="#this-dwc2-version-does-not-support-dma-mode-so-stop-working" title="Link to this heading"></a></h2>
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<p>该 DWC2 版本不支持 dma 模式，禁止使用。</p>
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</section>
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<section id="has-include">
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<h2>__has_include 报错<a class="headerlink" href="#has-include" title="Link to this heading"></a></h2>
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<p>如果报错，需要编译器支持 c99 语法，如果是 keil，请用 ac6 编译器</p>
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</section>
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<section id="config-usb-hs">
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<h2>CONFIG_USB_HS 何时使用<a class="headerlink" href="#config-usb-hs" title="Link to this heading"></a></h2>
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<p>当你的芯片硬件支持高速，并想初始化成高速模式时开启，相关 IP 会根据该宏配置内部或者外部 高速 PHY。</p>
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</section>
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<section id="failed-to-enable-port">
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<h2>Failed to enable port<a class="headerlink" href="#failed-to-enable-port" title="Link to this heading"></a></h2>
|
||
<p>供电不足或者硬件 USB 电路问题</p>
|
||
</section>
|
||
<section id="usb-host-urb-12-14">
|
||
<h2>移植 usb host 出现 urb 返回 -12/-14<a class="headerlink" href="#usb-host-urb-12-14" title="Link to this heading"></a></h2>
|
||
<p>检查 phy 配置，cache 配置（如果有），电源供电（建议自供电）</p>
|
||
</section>
|
||
<section id="usb-err-nak">
|
||
<h2>USB_ERR_NAK 说明<a class="headerlink" href="#usb-err-nak" title="Link to this heading"></a></h2>
|
||
<p>USB_ERR_NAK 只存在于 DWC2 buffer dma 模式，DWC2 在 buffer dma模式下对于中断传输不支持硬件处理 NAK 中断，因此需要软件处理，导致 NAK 中断非常多，建议搭配定时器使用。
|
||
DWC2 scatter/gather dma 模式下全部由硬件处理，但是不支持 split 传输。总结， <strong>半斤 IP</strong>。</p>
|
||
</section>
|
||
<section id="usb-host-usb">
|
||
<h2>USB host 连接 USB 网卡问题<a class="headerlink" href="#usb-host-usb" title="Link to this heading"></a></h2>
|
||
<p>表现为能识别网卡并且分配到 IP 地址，但是无法 ping 通，这是因为网卡自身需要开启自动拨号，通常需要使用 AT 口设置。具体为 EC20/ML307 等模块。</p>
|
||
</section>
|
||
<section id="pc-com">
|
||
<h2>PC 识别的 COM 口如何更改名称<a class="headerlink" href="#pc-com" title="Link to this heading"></a></h2>
|
||
<p>这是微软对 CDC ACM 的驱动问题，无法修改，如需修改，请联系微软并缴纳费用即可更改。</p>
|
||
</section>
|
||
<section id="connect-disconnect-event">
|
||
<h2>connect 和 disconnect event 不触发<a class="headerlink" href="#connect-disconnect-event" title="Link to this heading"></a></h2>
|
||
<p>当前仅 hpm 芯片支持 connect 和 disconnect 事件，其他芯片请使用 USB 检测 vbus 电路。DWC2 IP 支持，但是由于需要占用引脚，并且大多是log 口，
|
||
然后不同使能的配置也不一样，因此不做支持。</p>
|
||
</section>
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