[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Discuss-gnuradio] GnuRadio 3.1.1 and USRP on Fedora 8
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] GnuRadio 3.1.1 and USRP on Fedora 8 |
Date: |
Tue, 12 Feb 2008 13:45:14 -0800 |
User-agent: |
Mutt/1.5.17 (2007-11-01) |
On Tue, Feb 12, 2008 at 04:30:00PM -0500, Ed Criscuolo wrote:
> Johnathan Corgan wrote:
>
>> Can you confirm that you are in fact using a USB 2.0 controller? Your
>> symptoms are consistent with what happens when you have USB 1.1. The
>> enumeration is able to successfully occur, so you get the device,
>> etc., but when the host tries to establish a high speed endpoint for
>> data transfer, it fails.
>>
>
>
> Arrrgh.... you hit the nail on the head! USBView reports that the
> built-in hub is "Full-Speed", which is USB-speak for 1.1!
>
> Thanks.
>
> Any way the error reporting can be improved to explicitly indicate
> a 1.1 port?
>
It's ticket:90. http://gnuradio.org/trac/ticket/90
It needs somebody willing to work on it.
The fix is probably a new function in usrp_prims.cc that fishes out the
bcdUSB field from the libusb usb_device_descriptor. See usrp_usrp_p
for code that extracts info from the same descriptor.
Eric