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< div class = "date inPage" > 16 May 2025< / div > < div style = "color: gray;" >
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Read time: 7 minute(s)
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< p class = "- topic/p p" data-ofbid = "d101812e28__20250519091515" > 除了提供基本的显示功能，
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等附加功能。附加功能都是独立可选的，可以根据产品形态灵活组合。< / p >
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< p class = "- topic/p p" data-ofbid = "d101812e31__20250519091515" > USB Display 利用 CherryUSB 组合了一个 USB 复合设备，从而可以作为提供多个功能的组合设备。其中 Interface 0 是基本的 Display
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功能，其它每一个 Interface 对应一个独立的功能。< / p >
< section class = "- topic/section section" id = "usb_display_config_addon__section_bts_h2d_b2c" data-ofbid = "usb_display_config_addon__section_bts_h2d_b2c" > < h2 class = "- topic/title title sectiontitle" > 配置 USB HID TP < / h2 >
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< div class = "- topic/p p" data-ofbid = "d101812e39__20250519091515" > 如需在 USB Display 产品中附带触摸功能，则需要在 USB 复合设备中增加 HID Touch 功能。详细配置步骤如下所示：< ol class = "- topic/ol ol" id = "usb_display_config_addon__ol_rmr_p2d_b2c" data-ofbid = "usb_display_config_addon__ol_rmr_p2d_b2c" >
< li class = "- topic/li li" data-ofbid = "d101812e43__20250519091515" >
< p class = "- topic/p p" data-ofbid = "d101812e45__20250519091515" > 确保正确配置 TP（ ） ， < / p >
< p class = "- topic/p p" data-ofbid = "d101812e48__20250519091515" > 关于 TP 的详细配置说明，可查看 < a class = "- topic/xref xref" href = "../peripheral/touch.html" > CTP 移植指南< / a > 。< / p >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d101812e56__20250519091515" > 在 SDK 根目录，执行下列命令，进入 menuconfig
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的功能配置界面：< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "usb_display_config_addon__codeblock_kw1_ftc_b2c" data-ofbid = "usb_display_config_addon__codeblock_kw1_ftc_b2c" > scons menuconfig< / pre > < / li >
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< li class = "- topic/li li" data-ofbid = "d101812e61__20250519091515" >
< div class = "- topic/p p" data-ofbid = "d101812e63__20250519091515" > 使能 CherryUSB 中 HID TP 类型的 Device Class
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驱动，并且使能对应实例模板。< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "usb_display_config_addon__codeblock_l2f_dfd_b2c" data-ofbid = "usb_display_config_addon__codeblock_l2f_dfd_b2c" > > Local packages options
> Third-party packages options
[*] CherryUSB: tiny and portable USB host/device stack < strong class = "hl-keyword" > for< / strong > embedded system with USB IP --->
[*] Enable usb device mode --->
[*] Enable usb hid device --->
Use hid template (touch) --->
Hid Touch Parameter ---> < / pre > < / div >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d101812e69__20250519091515" >
< div class = "- topic/p p" data-ofbid = "d101812e71__20250519091515" > 使能 Display 类型的 Device Class 驱动，并且在 Composite Device
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中使能相应配置：< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "usb_display_config_addon__codeblock_ss2_2fd_b2c" data-ofbid = "usb_display_config_addon__codeblock_ss2_2fd_b2c" > > Local packages options
> Third-party packages options
[*] CherryUSB: tiny and portable USB host/device stack < strong class = "hl-keyword" > for< / strong > embedded system with USB IP --->
[*] Enable usb device mode --->
[*] Enable usb hid device --->
[*] Enable usb display device --->
[*] Enable composite device --->
[*] Use Composite template
Composite Parameter --->
[*] USBDEV_DISP_COMPOSITE
[*] USBDEV_TOUCH_COMPOSITE< / pre > < / div >
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< / li >
< / ol > < / div >
< / section >
< section class = "- topic/section section" id = "usb_display_config_addon__section_v23_ffd_b2c" data-ofbid = "usb_display_config_addon__section_v23_ffd_b2c" > < h2 class = "- topic/title title sectiontitle" > 配置 USB Audio (UAC) < / h2 >
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< div class = "- topic/p p" data-ofbid = "d101812e84__20250519091515" > 如需在 USB Display 产品中附带音频功能，则需要在 USB 复合设备中增加 UAC 功能。详细配置步骤如下所示：< ol class = "- topic/ol ol" id = "usb_display_config_addon__ol_uwg_gfd_b2c" data-ofbid = "usb_display_config_addon__ol_uwg_gfd_b2c" >
< li class = "- topic/li li" data-ofbid = "d101812e88__20250519091515" >
< p class = "- topic/p p" data-ofbid = "d101812e90__20250519091515" > 确保正确配置 TP（ ） ， < / p >
< p class = "- topic/p p" data-ofbid = "d101812e93__20250519091515" > 关于 TP 的详细配置说明，可查看 < a class = "- topic/xref xref" href = "../peripheral/touch.html" > CTP 移植指南< / a > 。< / p >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d101812e101__20250519091515" > 在 SDK 根目录，执行下列命令，进入 menuconfig
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的功能配置界面：< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "usb_display_config_addon__codeblock_s1h_rsd_c2c" data-ofbid = "usb_display_config_addon__codeblock_s1h_rsd_c2c" > scons menuconfig< / pre > < / li >
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< li class = "- topic/li li" data-ofbid = "d101812e106__20250519091515" >
< div class = "- topic/p p" data-ofbid = "d101812e108__20250519091515" > 使能 CherryUSB 中 HID TP 类型的 Device Class
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驱动，并且使能对应实例模板。< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "usb_display_config_addon__codeblock_vwg_gfd_b2c" data-ofbid = "usb_display_config_addon__codeblock_vwg_gfd_b2c" > > Local packages options
> Third-party packages options
[*] CherryUSB: tiny and portable USB host/device stack < strong class = "hl-keyword" > for< / strong > embedded system with USB IP --->
[*] Enable usb device mode --->
[*] Enable usb hid device --->
Use hid template (touch) --->
Hid Touch Parameter ---> < / pre > < / div >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d101812e114__20250519091515" >
< div class = "- topic/p p" data-ofbid = "d101812e116__20250519091515" > 使能 Display 类型的 Device Class
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驱动：< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "usb_display_config_addon__codeblock_wwg_gfd_b2c" data-ofbid = "usb_display_config_addon__codeblock_wwg_gfd_b2c" > > Local packages options
> Third-party packages options
[*] CherryUSB: tiny and portable USB host/device stack < strong class = "hl-keyword" > for< / strong > embedded system with USB IP --->
[*] Enable usb device mode --->
[*] Enable usb hid device --->
[*] Enable usb display device ---> < / pre > < / div >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d101812e122__20250519091515" >
< div class = "- topic/p p" data-ofbid = "d101812e124__20250519091515" > 在 < code class = "+ topic/ph pr-d/codeph ph codeph" > Enable composite device< / code > 中使能下列配置，添加一个
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< code class = "+ topic/ph pr-d/codeph ph codeph" > DISPLAY< / code > + < code class = "+ topic/ph pr-d/codeph ph codeph" > TP HID< / code > 的 USB
复合设备：< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "usb_display_config_addon__codeblock_e1q_vsd_c2c" data-ofbid = "usb_display_config_addon__codeblock_e1q_vsd_c2c" > > Local packages options
> Third-party packages options
[*] CherryUSB: tiny and portable USB host/device stack < strong class = "hl-keyword" > for< / strong > embedded system with USB IP --->
[*] Enable usb device mode --->
[*] Enable usb hid device --->
[*] Enable usb display device --->
[*] Enable composite device --->
Composite Parameter --->
[*] USBDEV_DISP_COMPOSITE
[*] USBDEV_TOUCH_COMPOSITE< / pre > < / div >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d101812e140__20250519091515" >
< div class = "- topic/p p" data-ofbid = "d101812e142__20250519091515" > 配置完成后，可按照以下方式在不同操作系统中使用 UAC 功能：< ul class = "- topic/ul ul" id = "usb_display_config_addon__ul_dcf_mdg_c2c" data-ofbid = "usb_display_config_addon__ul_dcf_mdg_c2c" >
< li class = "- topic/li li" data-ofbid = "d101812e146__20250519091515" >
< p class = "- topic/p p" data-ofbid = "d101812e148__20250519091515" > 对于 Windows 系统，在 PC 设备的扬声器下拉菜单中，选择< span class = "+ topic/ph ui-d/uicontrol ph uicontrol" > 扬声器(ArtInChip USB
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Device)< / span > 。< / p >
< br / > < div class = "imagecenter" > < img class = "- topic/image image imagecenter" id = "usb_display_config_addon__image_g5n_qdg_c2c" src = "../../../images/usb-display/uac_windows.png" width = "288" / > < / div > < br / >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d101812e157__20250519091515" >
< div class = "- topic/p p" data-ofbid = "d101812e159__20250519091515" > 对于 Linux 系统：< ol class = "- topic/ol ol" type = "a" id = "usb_display_config_addon__ol_myq_sdg_c2c" data-ofbid = "usb_display_config_addon__ol_myq_sdg_c2c" >
< li class = "- topic/li li" data-ofbid = "d101812e163__20250519091515" >
< p class = "- topic/p p" data-ofbid = "d101812e165__20250519091515" > 在电脑桌面上，找到音量图标< img class = "- topic/image image" id = "usb_display_config_addon__image_c1m_12g_c2c" src = "../../../images/usb-display/uac_linux_volume_symbol.png" / > 后，点击鼠标右键。< / p >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d101812e171__20250519091515" >
< div class = "- topic/p p" data-ofbid = "d101812e173__20250519091515" > 在弹出的菜单栏中，选择< span class = "+ topic/ph ui-d/uicontrol ph uicontrol" > ArtInChip USB
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Device< / span > ： < span class = "+ topic/ph ui-d/uicontrol ph uicontrol" >
< br / > < div class = "imagecenter" > < img class = "- topic/image image imagecenter" id = "usb_display_config_addon__image_sft_vdg_c2c" src = "../../../images/usb-display/uac_linux.png" width = "288" / > < / div > < br / >
< / span > 。< / div >
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< / li >
< / ol > < / div >
< / li >
< / ul > < / div >
< / li >
< / ol > < / div >
< / section >
< section class = "- topic/section section" id = "usb_display_config_addon__section_ezq_ttd_c2c" data-ofbid = "usb_display_config_addon__section_ezq_ttd_c2c" > < h2 class = "- topic/title title sectiontitle" > 配置 USB MSC (U 盘) < / h2 >
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< p class = "- topic/p p" data-ofbid = "d101812e196__20250519091515" > 如果 USB Display 产品需要附带 U 盘安装功能，需要在 USB 复合设备中增加一个 MSC 功能。< / p >
< div class = "- topic/p p" data-ofbid = "d101812e199__20250519091515" > 在增加 MSC 功能后，当设备插入 PC 设备时：< ul class = "- topic/ul ul" id = "usb_display_config_addon__ul_pgm_xtd_c2c" data-ofbid = "usb_display_config_addon__ul_pgm_xtd_c2c" >
< li class = "- topic/li li" data-ofbid = "d101812e203__20250519091515" >
< p class = "- topic/p p" data-ofbid = "d101812e205__20250519091515" > 如果 PC 没有安装驱动，设备会自动模拟出一个 U 盘，存储 PC 驱动安装包。< / p >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d101812e209__20250519091515" >
< p class = "- topic/p p" data-ofbid = "d101812e211__20250519091515" > 当用户安装完驱动程序后， U 盘又会自动消失。< / p >
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< / li >
< / ul > < / div >
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< p class = "- topic/p p" data-ofbid = "d101812e216__20250519091515" > 关于驱动的安装流程，可查看 < a class = "- topic/xref xref" href = "../app/usb-display-install-drive.html" > 安装驱动< / a > 。< / p >
< div class = "- topic/p p" data-ofbid = "d101812e223__20250519091515" > MSC 功能详细配置流程如下：< ol class = "- topic/ol ol" id = "usb_display_config_addon__ol_o5n_f5d_c2c" data-ofbid = "usb_display_config_addon__ol_o5n_f5d_c2c" >
< li class = "- topic/li li" data-ofbid = "d101812e227__20250519091515" > 在 SDK 根目录，执行下列命令，进入 menuconfig
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的功能配置界面：< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "usb_display_config_addon__codeblock_q3g_z5d_c2c" data-ofbid = "usb_display_config_addon__codeblock_q3g_z5d_c2c" > scons menuconfig< / pre > < / li >
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< li class = "- topic/li li" data-ofbid = "d101812e232__20250519091515" >
< div class = "- topic/p p" data-ofbid = "d101812e234__20250519091515" > 配置 < code class = "+ topic/ph pr-d/codeph ph codeph" > /rodata< / code >
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分区。< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "usb_display_config_addon__codeblock_cvl_h5d_c2c" data-ofbid = "usb_display_config_addon__codeblock_cvl_h5d_c2c" > > Application options --->
[*] Using File System Image < span class = "hl-number" > 0< / span > --->
Select File System Type (FATFS) --->
(packages/third-party/cherryusb/tools/aic_usbdisplay/) Data Directory
(rodata.fatfs) Image Name
[*] < strong class = "hl-keyword" > auto< / strong > calcuate image size< / pre > < / div >
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< div class = "- topic/p p" data-ofbid = "d101812e242__20250519091515" > MSC 功能的核心是将本地存储分区 < code class = "+ topic/ph pr-d/codeph ph codeph" > /rodata< / code > 挂载成 USB MSC 设备，因此必须优先配置
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< code class = "+ topic/ph pr-d/codeph ph codeph" > /rodata< / code > 分区。< div class = "table-container" > < table class = "- topic/table table frame-all" id = "usb_display_config_addon__table_uqh_j5d_c2c" data-ofbid = "usb_display_config_addon__table_uqh_j5d_c2c" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 1< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > 参数描述< / span > < / caption > < colgroup > < col style = "width:37.453183520599254%" / > < col style = "width:62.546816479400746%" / > < / colgroup > < thead class = "- topic/thead thead" >
< tr class = "- topic/row" >
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< th class = "- topic/entry entry colsep-1 rowsep-1" id = "usb_display_config_addon__table_uqh_j5d_c2c__entry__1" > < p class = "- topic/p p" data-ofbid = "d101812e266__20250519091515" > 参数< / p > < / th >
< th class = "- topic/entry entry colsep-0 rowsep-1" id = "usb_display_config_addon__table_uqh_j5d_c2c__entry__2" > < p class = "- topic/p p" data-ofbid = "d101812e270__20250519091515" > 描述< / p > < / th >
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< / tr >
< / thead > < tbody class = "- topic/tbody tbody" >
< tr class = "- topic/row" >
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< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "usb_display_config_addon__table_uqh_j5d_c2c__entry__1" > < p class = "- topic/p p" data-ofbid = "d101812e280__20250519091515" > < code class = "+ topic/ph pr-d/codeph ph codeph" > Using File System Image
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0< / code > < / p > < / td >
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< td class = "- topic/entry entry colsep-0 rowsep-1" headers = "usb_display_config_addon__table_uqh_j5d_c2c__entry__2" > < p class = "- topic/p p" data-ofbid = "d101812e285__20250519091515" > 配置文件系统镜像格式。< / p > < / td >
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< / tr >
< tr class = "- topic/row" >
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< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "usb_display_config_addon__table_uqh_j5d_c2c__entry__1" > < p class = "- topic/p p" data-ofbid = "d101812e292__20250519091515" > < code class = "+ topic/ph pr-d/codeph ph codeph" > Select File System Type< / code > < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-1" headers = "usb_display_config_addon__table_uqh_j5d_c2c__entry__2" > < p class = "- topic/p p" data-ofbid = "d101812e297__20250519091515" > 选择分区格式，如选择 FATFS， < code class = "+ topic/ph pr-d/codeph ph codeph" > Select File System
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Type (FATFS)< / code > 。< / p > < / td >
< / tr >
< tr class = "- topic/row" >
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< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "usb_display_config_addon__table_uqh_j5d_c2c__entry__1" > < p class = "- topic/p p" data-ofbid = "d101812e307__20250519091515" > < code class = "+ topic/ph pr-d/codeph ph codeph" > (packages/third-party/cherryusb/tools/aic_usbdisplay/)
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Data Directory< / code > < / p > < / td >
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< td class = "- topic/entry entry colsep-0 rowsep-1" headers = "usb_display_config_addon__table_uqh_j5d_c2c__entry__2" > < p class = "- topic/p p" data-ofbid = "d101812e312__20250519091515" > 打包的文件夹，示例目录为
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< span class = "+ topic/ph sw-d/filepath ph filepath" > (packages/third-party/cherryusb/tools/aic_usbdisplay/)
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Data Directory< / span > ，用于存放驱动安装包文件。< / p > < / td >
< / tr >
< tr class = "- topic/row" >
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< td class = "- topic/entry entry colsep-1 rowsep-1" headers = "usb_display_config_addon__table_uqh_j5d_c2c__entry__1" > < p class = "- topic/p p" data-ofbid = "d101812e322__20250519091515" > < code class = "+ topic/ph pr-d/codeph ph codeph" > (rodata.fatfs) Image
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Name< / code > < / p > < / td >
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< td class = "- topic/entry entry colsep-0 rowsep-1" headers = "usb_display_config_addon__table_uqh_j5d_c2c__entry__2" > < p class = "- topic/p p" data-ofbid = "d101812e327__20250519091515" > 映像名为 < code class = "+ topic/ph pr-d/codeph ph codeph" > rodata.fatfs< / code > < / p > < / td >
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< / tr >
< tr class = "- topic/row" >
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< td class = "- topic/entry entry colsep-1 rowsep-0" headers = "usb_display_config_addon__table_uqh_j5d_c2c__entry__1" > < p class = "- topic/p p" data-ofbid = "d101812e336__20250519091515" > < code class = "+ topic/ph pr-d/codeph ph codeph" > auto calcuate image size< / code > < / p > < / td >
< td class = "- topic/entry entry colsep-0 rowsep-0" headers = "usb_display_config_addon__table_uqh_j5d_c2c__entry__2" > < p class = "- topic/p p" data-ofbid = "d101812e341__20250519091515" > 自动计算镜像尺寸。< / p > < / td >
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< / tr >
< / tbody > < / table > < / div > < / div >
< / li >
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< li class = "- topic/li li" data-ofbid = "d101812e349__20250519091515" >
< div class = "- topic/p p" data-ofbid = "d101812e351__20250519091515" > 在 menuconfig 中使能 CherryUSB 中 Audio 类型的 Device Class
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驱动，并且使能对应实例模板：< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "usb_display_config_addon__codeblock_xwr_1vd_c2c" data-ofbid = "usb_display_config_addon__codeblock_xwr_1vd_c2c" > > Local packages options
> Third-party packages options
[*] CherryUSB: tiny and portable USB host/device stack < strong class = "hl-keyword" > for< / strong > embedded system with USB IP --->
[*] Enable usb device mode --->
[*] Enable usb msc device --->
Use ram or storage template (msc storage) --->
MSC Storage Parameter --->
[*] USBDEV_MSC_THREAD
[*] USBD_MSC_STORAGE_USING_HOTPLUG
(/rodata) MSC_STORAGE_PATH
(< span class = "hl-number" > 204800< / span > ) USBDEV_MSC_MAX_BUFSIZE< / pre > < / div >
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< div class = "- topic/p p" data-ofbid = "d101812e356__20250519091515" >
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< div class = "table-container" > < table class = "- topic/table table frame-all" id = "usb_display_config_addon__table_j45_lxd_c2c" data-ofbid = "usb_display_config_addon__table_j45_lxd_c2c" data-cols = "2" > < caption class = "- topic/title title tablecap" data-caption-side = "top" data-is-repeated = "true" > < span class = "table--title-label" > 表< span class = "table--title-label-number" > 2< / span > < span class = "table--title-label-punctuation" > . < / span > < / span > < span class = "table--title" > 参数描述< / span > < / caption > < colgroup > < col style = "width:36.90036900369004%" / > < col style = "width:63.09963099630996%" / > < / colgroup > < thead class = "- topic/thead thead" >
< tr class = "- topic/row" >
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< th class = "- topic/entry entry colsep-1 rowsep-1" id = "usb_display_config_addon__table_j45_lxd_c2c__entry__1" > < p class = "- topic/p p" data-ofbid = "d101812e374__20250519091515" > 参数< / p > < / th >
< th class = "- topic/entry entry colsep-0 rowsep-1" id = "usb_display_config_addon__table_j45_lxd_c2c__entry__2" > < p class = "- topic/p p" data-ofbid = "d101812e378__20250519091515" > 描述< / p > < / th >
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< / tr >
< / thead > < tbody class = "- topic/tbody tbody" >
< tr class = "- topic/row" >
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< td class = "- topic/entry entry colsep-1 rowsep-0" headers = "usb_display_config_addon__table_j45_lxd_c2c__entry__1" > < p class = "- topic/p p" data-ofbid = "d101812e388__20250519091515" > < code class = "+ topic/ph pr-d/codeph ph codeph" > (/rodata)
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MSC_STORAGE_PATH< / code > < / p > < / td >
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< td class = "- topic/entry entry colsep-0 rowsep-0" headers = "usb_display_config_addon__table_j45_lxd_c2c__entry__2" > < p class = "- topic/p p" data-ofbid = "d101812e393__20250519091515" > 设置 USB MSC 挂载分区为 < code class = "+ topic/ph pr-d/codeph ph codeph" > /rodata< / code >
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< / p > < / td >
< / tr >
< / tbody > < / table > < / div >
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< / div >
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< / li >
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< li class = "- topic/li li" data-ofbid = "d101812e405__20250519091515" >
< div class = "- topic/p p" data-ofbid = "d101812e407__20250519091515" > 使能 Display 类型的 Device Class 驱动，并且在 Composite Device
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中使能相应配置。< pre class = "+ topic/pre pr-d/codeblock pre codeblock language-c" id = "usb_display_config_addon__codeblock_ftt_4xd_c2c" data-ofbid = "usb_display_config_addon__codeblock_ftt_4xd_c2c" > > Local packages options
> Third-party packages options
[*] CherryUSB: tiny and portable USB host/device stack < strong class = "hl-keyword" > for< / strong > embedded system with USB IP --->
[*] Enable usb device mode --->
[*] Dynamic registration mode --->
[*] Use AIC USB Display dynamic registration
[*] Enable usb hid device --->
[*] Enable usb msc device --->
[*] Enable usb audio device --->
[*] Enable usb display device --->
-*- Enable composite device ---> < / pre > < / div >
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< p class = "- topic/p p" data-ofbid = "d101812e412__20250519091515" > MSC 需要动态的添加和删除，因此复合设备的配置方法略有不同。如上所示，添加了一个 < code class = "+ topic/ph pr-d/codeph ph codeph" > DISPLAY< / code > +
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< code class = "+ topic/ph pr-d/codeph ph codeph" > TP HID< / code > + < code class = "+ topic/ph pr-d/codeph ph codeph" > UAC< / code > +
< code class = "+ topic/ph pr-d/codeph ph codeph" > MSC< / code > 的 USB 复合设备，且 < code class = "+ topic/ph pr-d/codeph ph codeph" > MSC< / code >
会根据驱动安装情况动态出现。< / p >
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< / li >
< / ol > < / div >
< / section >
< / div >
< / article > < / main > < / div >
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< / div >
< nav role = "navigation" id = "wh_topic_toc" aria-label = "On this page" class = "col-lg-2 d-none d-lg-block navbar d-print-none" >
< div id = "wh_topic_toc_content" >
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