USB2SOFT USB 2.0 Device SIE, VHDL source code / IP

USB2SOFT is the VHDL source code to connect an FPGA-based USB device to a USB host.
The code supports both high-speed (480 Mbits/s) and full-speed (12 Mbits/s) connections.
This FPGA code interfaces with a physical layer transceiver (PHY). The code is compatible with two industry standard interfaces commonly found in
USB PHYs:
12-pin ULPI [2] (example: USB3300 from SMSC [5])
22-pin UTMI
The code is structured so that the ULPI interface is a wrapper around the UTMI SIE.
The code is a Serial Interface Engine (SIE) implementing the Device side
of the USB 2.0
standard protocol layer [1] including control and bulk endpoints.
USB2-SOFT does NOT support the following:
Host-side protocol, OTG, low-speed, Interrupt and Isochronous endpoints.

VHDL source code included.
Unlimited license to make and use. See the complete licensing terms at comblock.com/download/softwarelicense.pdf