其核心在于PCIe转USB芯片,该芯片可以处理PCIe和USB之间的数据转换,从而实现PCIe扩展USB的功能。 电科星拓推出PCIe转USB芯片 电科星拓自主研发的PCIe转USB芯片(XUSB系列)已成功实现规模化量产。该系列芯片是一种用于将PCIe2.0通道转换为USB3.0接口的芯片,实现PCIe设备与USB3.0设备之间的数据传输。最多支持1x 5Gb/s ...
USB的在CPU之下控制USB系统的控制器叫Host controller(对应于pcie里的RC)。操作系统控制host controller通过一个软件协议叫xHCI (enhanced host controller interface)。记住这个名词,尽管我们本系列文章不会涉及xHCI,但是实际你使用usb controller的时候,你要以该协议的方式往内存里写固定格式的content,Host controller根据...
然后start host controller,发现ep出现了received master abort,排查了两天,发现是RC BAR0设计上的问题,导致不认mem wr请求,修改到BAR1后正常。枚举hub发现port对应的端口号为4和5,两个口上插上USB3.0 U盘,然后检查usb portsc寄存器可以看到进入U0,link speed为SUPERSPEED。注意trb的映射地址要确保落在BAR Range中...
PCI multi-function device consists of two OHCI host controllers for Full Speed/Low Speed signaling and one EHCI host controller for High Speed signaling USB Host Controller operational registers directed-mapped to PCI General Features Strapped pins configurable with optional EEPROM or SMBus interface su...
| | +-00.1 NVIDIA Corporation TU104 HD Audio Controller | | +-00.2 NVIDIA Corporation TU104 USB 3.1 Host Controller | | \-00.3 NVIDIA Corporation TU104 USB Type-C UCSI Controller 4.3. RCIE(Root Complex Integrated Endpoint) 说到PCIe设备,脑海里面可能第一反应就是有一个PCIe的插槽,然后把显卡...
笔者在实际开发工作中,有个项目需要实现在PC主机的PCIE槽上扩展两路USB3.0,经过在世强的网站上搜索,找到了一个USB3.0的PCIe转换芯片。他就是世强代理的,来自瑞萨推出的USB3.0第三代主控芯片UPD720202。系统总线与PCIe Gen2规范兼容,同时支持USB3.0和USB2.0协议。它的两个USB端口可同时实现LS(低速)/FS(全速)/HS(...
00:1a.0 USB controller: Intel Corporation Lynx Point USB Enhanced Host Controller #2 (rev 05) 00:1c.0 PCI bridge: Intel Corporation Lynx Point PCI Express Root Port #1 (rev d5) 00:1c.4 PCI bridge: Intel Corporation Lynx Point PCI Express Root Port #5 (rev d5) ...
Hello all, I'm having some trouble getting a PCIe usb controller working with my system and I'm not sure where the exact problem is. As an FYI, I am...
Controller | | +-00.2 NVIDIA Corporation TU104 USB 3.1 Host Controller | | -00.3 NVIDIA Corporation TU104 USB Type-C UCSI Controller # Host bridge $ sudo lspci -s 80:01.0 -v 80:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Starship/Matisse PCIe Dummy Host Bridge Flags: fast ...
你需要买一个USB读卡器，然后把SD卡插入读卡器中，再把读卡器的USB接口连接电脑，电脑中就会出现可移动磁盘了，然后将文件拉入可移动磁盘就OK了