Changes
/* pull up and pull down */
For reaching which wire you have to pull-up or pull-down, here the tips :
*For slave (ideal for sniffing) : just take your USB1 joystick without plug it, just supply it (+5v red, 0v black), and test while-black and green-black with voltmeter, if you have got 5v then put a VHDL pull-up, and if you have got 0v then put a VHDL pull-down.
*For master (ideal for creating a mini-host) : just take your PC USB1 port, and test whilewhite-black and green-black with voltmeter, if you have got 5v then put a VHDL pull-up, and if you have got 0v then put a VHDL pull-down. Normally you result two pull-down.
==== Synchronize, decode and check USB frames ====
