usb: 1.0 phy (softcore) and USB3300 (ULPI based USB 2.0 phy IC)

[Nic30]

https://github.com/www-asics-ws/usb1_device
https://github.com/lambdaconcept/usbsniffer/releases
https://github.com/ultraembedded/riscv_sbc
https://github.com/mrrb/tfg
https://sites.google.com/site/vysakhppillai/technical-articles/universal-serial-bus
https://github.com/im-tomu/valentyusb
https://github.com/hdl4fpga/hdl4fpga/blob/master/ULX3S/scopeio/usbserial_rxd.vhd
https://github.com/tinyfpga/TinyFPGA-Bootloader/tree/master/common
https://github.com/timvideos/HDMI2USB-numato-opsis-sample-code/tree/master/comms/ulpi
https://github.com/enjoy-digital/usb3_pipe
https://github.com/greatscottgadgets/luna

[Nic30]

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