[hpsdr] USB Specification

[Christopher T. Day]

As a matter of fact, the current firmware in the Ozy's FX2 does _not_
support anything other than high-speed mode (480Mbps). The USB
descriptors for high-speed mode (480 Mbps) include descriptors for data
transport on ENDPOINTS 2, 4, 6, & 8; the full-speed (12.5Mbps)
descriptors - required by any USB device to keep from hanging a
full-speed bus - include _no_ data ENDPOINT descriptors. So while Ozy
will not hang your USB 1.1 bus, you cannot get any data into or out of
it.


	Chris - AE6VK


-----Original Message-----
From: Bill Tracey [mailto:bill at ewjt.com] 
Sent: Wednesday, January 31, 2007 5:01 PM
To: kd5nwa; Chris Stratton
Cc: hpsdr at hpsdr.org
Subject: Re: [hpsdr] USB Specification

***** High Performance Software Defined Radio Discussion List *****

Ahh -- but we have 'messed around with' the FX2 firmware -- we have our
own 
FX2 code, derived from the GNURadio USRP code.

Regards,

Bill  (kd5tfd)

At 01:25 PM 1/31/2007, kd5nwa wrote:
>***** High Performance Software Defined Radio Discussion List *****
>
>Unless they have messed around with the FX2 firmware the
>specifications of the FX2 chips says it will work with USB 1.0 it
>will not support the 12 Mb rate but not the 1.5 Mb rate.
>
><  URL:http://www-corot.obspm.fr/COROT-ETC/Files/CY7C68013.pdf  >
><...snip...>


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