Re: USB2 problems with Fedora/USRP

----Messaggio originale----
Da: [email protected]
Data: 15/01/2009 22.37
A: “Discuss GNU Radio List”
[email protected]
Ogg: [Discuss-gnuradio] Re: USB2 problems with Fedora/USRP


The next
step is to try out some example, e.g. or

the test I try, I can see
that blinking led is switched of for a couple seconds, then it blinks at

rate, and
another led near to it
turns on (don’t remember which is D402 and D403).

On console, i get this kind of error:

usb_control_msg failed: error sending control message: Connection timed

usrp: failed to load fpga bitstream


Traceback (most recent call last):
File “.
py”, line 106, in ?

    main ( )
File "./", line 96, in main

(rate, verbose)

File "./", line 63, in run_test

usrp_tx=usrp.sink_s(0, tx_interp)

File "/usr/local/hamradio/gnuradio/lib/python2.5/site-packages/gnuradio/usrp.

py", line 230, in init

fpga_filename, firmware_filename)



py", line 940, in sink_s



RuntimeError: can’t open usrp1

==== Eric B.

Confirm that your computer
has an EHCI host controller.



The PC has the EHCI host controller:

[[email protected] usb]# lspci

00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #2
(rev 03)

Now, I’ve
tried again launching the and then
[[email protected] usb]# cat

Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 7 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=ff(vend.)
Sub=ff Prot=ff MxPS=64
#Cfgs= 1
P: Vendor=fffe ProdID=0002 Rev= 1.04
S: Manufacturer=Free Software Folks
Product=USRP Rev 4
C:* #Ifs= 3 Cfg#= 1 Atr=c0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 0 Cls=ff
(vend.) Sub=ff Prot=ff
I:* If#= 1 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E: Ad=02(O)
Atr=02(Bulk) MxPS=
512 Ivl=0ms
I:* If#= 2 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E: Ad=86(I) Atr=02
(Bulk) MxPS=
512 Ivl=0ms

It seems that I was wrong: USB2 driver seems to be working well, at least for the first
steps, because I am successful in configuring the Cypress FX2.
Then it looks like the problem is actually
in the
next step, that is, loading the fpga bitstream


After some more investigation and code inspection, it turns out that I
managed to load the FPGA (I guess…) but the
weird thing is that I achieved that by changing the source code in in
/gnuradio/usrp/host/lib/legacy/ now
the FPGA load succeeds

// reset FPGA (and on rev1 both AD9862’s, thus killing clock)
usrp_set_fpga_reset (udh,
1); // hold fpga in reset

if (write_cmd (udh, VRQ_FPGA_LOAD, 0, FL_BEGIN, 0, 0) != 0)
goto fail;

while ((n
= fread (buf, 1, sizeof (buf), fp)) > 0){
if (write_cmd (udh, VRQ_FPGA_LOAD, 0, FL_XFER, buf, n) != n)

fprintf (stderr, “iz0cez_debug: added printout, delay?\n”); //<==

(write_cmd (udh, VRQ_FPGA_LOAD, 0, FL_END, 0, 0) != 0)
goto fail;

fclose (fp);

I could verify that by
using usrper:

[[email protected] rev4]# usrper load_firmware std.ihx
usrper: found unconfigured usrp; needs firmware.

[[email protected] rev4]# usrper load_fpga std_2rxhb_2tx.rbf
iz0cez_debug: added printout, delay?
[[email protected] rev4]#

May this indicate a timing issue in the USB2 connection? How may
investigate (and possibly fix or workaround) USB
timing problems?

Thanks for any help

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