OPENCORES.ORG

Works perfectly.
I have sent 100,000 bulk out transactions to the FPGA without a single bit
error. I have not done that much with tx_phy yet but I will let you know if
I find any issues.

Rudi - Thanks for your continued hard work in support of opencores!

Regards,

Matt

 -----Original Message-----
From: 	usb-bounces@o... [mailto:usb-bounces@o...]  On
Behalf Of Rudolf Usselmann
Sent:	19 October 2004 10:43
To:	Discussion list about free, open source USB IP core
Subject:	RE: [usb] bulkusb.sys with usb1_funct and usb_phy

Howdy All,

I've heard about these rumors that there was a problem with
USB PHY before, but nobody ever debugged it or pinpointed
the problem ...

Finally I had some time, and looked in to the problem. Turns
out there where two problems: 1) DPLL in the rx_phy didn't
properly align, and could drift such that you would eventually
skip bits; 2) the tx_phy would drop the very last bit in a
packet if that bit was a stuff bit.

Fixes have been checked in, please give it a try ...

Regards,
rudi
=============================================================
Rudolf Usselmann,  ASICS World Services,  http://www.asics.ws
Your Partner for IP Cores, Design, Verification and Synthesis

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