[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [usb] USB1.1 Core Address Assignment Failing. Debuggingsuggestions?




Make sure that the clock is really 48 Mhz, check it carefully,
should have less than 0.25% (?) jitter - check the usb spec, I
might be off here ...

Most common mistake is setting the tx_mode incorrectly in the
usb_phy. Second most common mistake is ROM contents. The default
should get you enumerated on a linux box. Even though it's useless
without a custom driver ...

Function address 0 seems to be strange. Never have seen that ...

On a linux box, install the usb tools, may be you already have
the "lsusb" command, see what that reports.

Good luck,

rudi               
-------------------------------------------------------
www.asics.ws  -- Solutions for your ASIC/FPGA needs ---
---------------- FPGAs * Full Custom ICs * IP Cores ---
* * * FREE IP Cores  --> http://www.asics.ws/ <-- * * *

--
To unsubscribe from usb mailing list please visit http://www.opencores.org/mailinglists.shtml