usb extensible host controller

OHCI (Open Host Controller Interface) is a USB Host Interface specification jointly developed by Compaq, Microsoft, National Semiconductor and other companies. It provides a more abstract Interface for USB data transmission. In OHCI specifications, the most important concept

data transmission correctness, This layer encapsulates the operations of Ed and TD, providing a data transfer interface based on OHCI. For more information on ED and TD please refer to the OHCI specification "Open Host Controller Interface Specification for USB." 4, USB Device management according to the

When using the PS minimum system built on Zedboard in Vivado (2015.4.2), the USB-OTG fails to function properly and errors in the startup log.After a comparison with each of the original startup files, it was determined that the bit out of the Vivado project was out of the question. This means that the construction works are wrong.USB Boot error message: External PHY chip initialization failed, loading module failed.EHCI_HCD:USB 2.0 ' enhanced '

1, plug in the USB to the serial cable (in the VirtualBox Setup Panel USB option plus the corresponding USB to the serial port option, but this driver is our WIN7 inside)2. (check the corresponding usb-serial Controller in "Device" and "Assign