Linux Usb Gadget Ethernet
The Pi appears like an Ethernet device. Lets call it usb-gadgetservice.
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Steps to test Ethernet Gadget with Linux Host When the Linux kernel boots up on peripheral give the below commands.
Linux usb gadget ethernet. This is relevant for those sunxi devices that offer a On-The-Go OTG port allowing this USB connector to act in a dual role mode. I have an usb to ethernet adapter connected to my linux system. In Linux kernel 26 usbnet can support this standard USB-IF class specification.
Set it up like any other two-host Ethernet link. When I connect the Zedboard USB Peripheral to a Windows PC host I see the enumeration take place and in the Windows device manager USB EthernetRNDIS Gadget is detect and appears. On the Yocto Configure the linux-kernel as below to set the USB controller in Gadget only mode and enable the USB Ethernet Gadget relevant options.
Note that even though its called Ethernet Gadget you do not use an Ethernet cable. Unit DescriptionLoad USB gadget scheme Requiressys-kernel-configmount Aftersys-kernel-configmount Service ExecStartbingt load ecmscheme ecm RemainAfterExityes ExecStopbingt rm -rf ecm Typesimple Install WantedByusb-gadgettarget Such a service can be controlled with systemctl. For this simple example fixed IP addresses are assigned to the both the host PC USB network interface and the target device USB network interface.
The term USB Gadget will usually refer to the Linux USB gadget framework. That hardware is exposed through endpoint objects which accept streams of INOUT buffers and through callbacks that interact with gadget drivers. The API abstracts the peripheral controller endpoint hardware.
You can even share your desktop computers network setup so your Pi can access the internet through your computer via the USB cable. High speed config 1. On the host HOST_USB_IP10011 sudo ifconfig usb0 HOST_USB_IP netmask 2552552550 route.
Ifconfig usb0 10002 Increase the MTU Maximum Transfer Unit to the highest supported by the ethernet gadget. In the above command lines we can see the available connection information on my system. Go to the Control Panel and open Network Connections.
Right-click the new connection labeled Linux USB EthernetRNDIS Gadget and click Rename. The only cable is the USB micro-B cable from your computer to your Pi Zero. Bitbake linux - adi - c menuconfig Configure the USB drivers to Gadget only mode or Dual role mode.
Right-click on the newly labeled icon and select properties. It is the only layer that talks to hardware through registers fifos dma irqs and the like. The USB peripheral will enumerate to the host as an Ethernet device using the usbnet driver with Linux hosts or Microsofts RNDIS driver with Windows hosts.
The USB OTG connector supports using the Ethernet Gadget to create a networking device over USB. This is the lowest software level. To get the native USB 20 OTG you need to compile the mainline Linux source and install configure the drivers.
This is not chip dependent other than the OTG abilities for DWC2and you can try to find information in Linux forums. Under the properties General tab select the item labeled Internet Protocol TCPIP. CDC Ethernet ECM Assigning IP addresses.
The Linux kernel has a class of drivers called USB Gadgets that allow you to use USB as a transport for a number of different protocols like serial virtual file systems and Ethernet devices. Rename it to something useful such as USB Network. The Kernel configuration was not quite the same as in the link above.
Nevertheless I was able to get the USB Ethernet Gadget configuration done. Bridging it to the LAN from the USB host may be the easiest way to run. I edited the connection information and gave manual ip 192168121 in the connections menu available at the top right.
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