[Discuss-gnuradio] Re: USB2 problems with Fedora/USRP

[Alberto Trentadue]

>----Messaggio originale----
>Da: address@hidden
>Data: 15/01/2009 22.37
>A: "Discuss GNU Radio List"
<address@hidden>
>Ogg: [Discuss-gnuradio] Re: USB2 problems with Fedora/USRP
>
>> Hello
>> 
>...
>> The next 
step is to try out some example, e.g. usrp_benchmark_usb.py or usrp_wfm_rcv.py.
>> Whatever 
>the test I try, I can see 
that blinking led is switched of for a couple seconds, then it blinks at lower 
>> 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 out
>> usrp: failed to load fpga bitstream 

>/opt/gnuradio/share/usrp/rev4/std_2rxhb_2tx.rbf
>> Traceback (most recent call last):
>>     File ".
/usrp_benchmark_usb.
>py", line 106, in ?
>>         main ( )
>>     File "./usrp_benchmark_usb.py", line 96, in main

>>         ok=run_test 
>(rate, verbose)
>>     File "./usrp_benchmark_usb.py", 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)
>>     File 
"/usr/local/hamradio/gnuradio/lib/python2.5/site-packages/gnuradio/usrp1.
>py", line 940, in  sink_s
>>         return 
_usrp1.sink_s(*args)
>> RuntimeError: can't open usrp1
>...
>====  Eric Blossom 
>wrote 
>
>>Confirm that your computer 
has an EHCI host controller.
>...
>=====
>
>Hello
>
>The PC has the EHCI host controller:
>
>
>address@hidden 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 usrp_benchmark_usb.py and then
>address@hidden usb]# cat 
>/proc/bus/usb/devices
>...
>T:  
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
>S:  
>Product=USRP Rev 4
>S:  
SerialNumber=480f9a8a
>C:* #Ifs= 3 Cfg#= 1 Atr=c0 MxPwr=  0mA
>I:* If#= 0 Alt= 0 #EPs= 0 Cls=ff
>(vend.) Sub=ff Prot=ff 
Driver=(none)
>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 
>configuration 
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 
/usr/local/hamradio/gnuradio/share/usrp/rev4/std_2rxhb_2tx.rbf
>

Hello


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/usrp_prims.cc 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)
      goto 
fail;
  }

  //IZ0CEZ_DEBUG
  fprintf (stderr, "iz0cez_debug: added printout, delay?\n"); //<== PRINTOUT??

  if 
(write_cmd (udh, VRQ_FPGA_LOAD, 0, FL_END, 0, 0) != 0)
    goto fail;
  
  fclose (fp);
...

I could verify that by 
using usrper:

address@hidden rev4]# usrper load_firmware std.ihx
usrper: found unconfigured usrp; needs firmware.

address@hidden rev4]# usrper load_fpga std_2rxhb_2tx.rbf
iz0cez_debug: added printout, delay?
address@hidden rev4]# 

Why? 
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
Alberto




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