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Host就是主,可以起到控制作用;Device(slave)就是从,是被控制的。例如主机的USB口,可以识别U盘或者是其它USB设备,所以主机的USB就是Host接口,而U盘的就是device。OTG就是指既可以做Host口亦可以做device口。 HUB是大家常说的集线器,它应用于使用星型拓扑结构的网络中,连接多个计算机或网络设备。它是一个双向通路的...
A host-to-host chip includes: first and second ports coupled to first and second hosts respectively; and a host-to-host control circuit coupled to the first port and the second port. When the host-to-host chip is coupled to the second host, the host-to-host control circuit identifies ...
USB 主机控制器有 3 种规范, UHCI(Universal Host Controller Interface),这种规范主要是 Intel、 Via 芯片公司提供支持 PC 主板的; OHCI(Open HostController Interface),这种规范是微软提出来的,主要应用在非 PC 系统上的嵌入式领域上的 USB 芯片; EHCI(Enhanced Host Controller Interface),这种后来为提高 USB ...
接口芯片:通用USB接口芯片 Usb interface chip USB 主控制器:USB HOST功能芯片 Usb host chip USB微控制器:带USB接口MCU usb with mcu 并口桥:USB转并口芯片 Usb to parallel bridge 8bit 16bit 32bit 串口桥:USB转串口芯片 Usb to serial bridge IIC、SPI或者UART 音频控制器: Usb Audio Controller IIS接口...
The versatileEZ-USB™ HX3is a USB-IF compliant USB 5 Gbps hub controller which allows the charging of devices without a host (ghost charge) and enables upstream charging for portable devices with a USB on-the-go (OTG) host (ACA-dock feature). EZ-USB™ HX3 also includes automotive-...
usbdrd3_1设备树定义如下,默认模式为Host。 [arch/arm64/boot/dts/rockchip/rk3588.dtsi] / { ... usbdrd3_1: usbdrd3_1 { compatible ="rockchip,rk3588-dwc3","rockchip,rk3399-dwc3"; clocks = <&cru REF_CLK_USB3OTG1>, <&cru SUSPEND_CLK_USB3OTG1>, <&cru...
当Chipidea USB驱动的内核代码drivers/usb/chipidea/core.c中的ci_hdrc_probe()被执行后(即一个 platform_device与ci_hdrc_driver这个platform_driver匹配上了),它会调用drivers/usb/chipidea/host.c中的 ci_hdrc_host_init()函数,该函数完成hc_driver的初始化并赋值一系列与Chipidea平台相关的私有数据, 如代码...
child device represents the USB host controller. This device node is in effect // when the controller is in host mode. // You may name the device whatever you want; we don't depend on it being called 'USB0'. // Device(USB0) { // // The host controller device node needs to ...
USB协议按功能分为2部分,USB HOST(USB主协议)和USB SLAVE(USB从协议)分别应用于USB HOST CONTROLLER(USB主控制器)和USB DEVICE(USB设备)。一般,USB HOST要比USB SLAV E复杂,对于广大的非PC用户来说,尤其是嵌入式系统用户来说,由于USB协议的不对称性,使得实现USB HOST比USB SLAVE要困难地多,Philips公司的ISP116...