Problem(s) while connecting USRP2 with GNURadio

GNU Radio
1

I read almost everything on the forum regarding this problem and tried
my
best.I am providing as much details as possible hence the post became
long.I
hope it will help the forum to help.

I am working with USRP2.I installed GnuRadio as well as UHD(Using Marcus
D.
Leech script).I changed the host computer IPV4 address to 192.168.10.1
with
subnet mask 255.255.255.0.Disabled the firewall also.

Now…
1.When I run usrp2_probe.py its returning the device Mac address :
00:50:c2:85:42
Name(ID):
-1
Converter Rate,gain Range,Freq Range.

2.When I run uhd_find_devices.py
It returns linux; GNU C++ version 4.4.3; Boost_104000;
UHD_003.001.002-a3e1cb7
No UHD Devices found.

3.When I do ping 192.168.10.2
Its says “destination host unreachable”

4.I also then tried to change the default IPV4 address of USRP2 by
sudo ./usrp2_recovery.py - -ifc=eth0 - -new-ip=192.168.10.3
Then I pinged but same “destination host unreachable”

  1. Then I monitored the network traffic on wireshark.I found……
    a.When I do usrp2_probe.py then there happens communication between host
    and
    USRP2 and the USRP2 sends back his mac address to the host(was clearily
    visible in the wireshark).
    b. But when I do uhd_find_devices.py then the host broadcasts message
    but
    there is no reply packet from usrp2 at all.

6.Then I scanned the network using nmap but was not able to find any
device
there with IPV4 address 192.168.10.3(modified one) up.Then I also
searched
for 192.168.10.2 but no help at all.

  1. When I boot he USRP2 then all LED’s blinks as given in the youtube
    video
    i.e. all blink in the beginning and finally only D and F remains
    glowing.Also the green light to the left of the Ethernet cable keeps
    glowing.The orange light to the right keeps blinking now and then when I
    do
    nmap scanning.

8.My host computers have gigabit Ethernet ports so that is not an issue
I
think.

9.I burnt my SD card with the firmware FPGA image as given at
http://code.ettus.com/redmine/ettus/projects/public/wiki/U2binaries

Raw Ethernet rel-20100603 d488c6b2 June 3, 2010
5b73d3a67d7998d83936906dac0cb200

Raw Ethernet, with XCVR2450 v3.3.1git Jun 08, 2010 Use this with Raw
Ethernet and the XCVR2450

I also checked the MD5 sum to make sure that I got the proper bin files.
I have 3 USRP2 devices and the same problem prevails in all the three.
No communication is happening above the layer three.
Let me know what more I should try.

Sumit Kr.
Research Assistant
Communication Research center
IIIT Hyderabad
India

View this message in context:
http://old.nabble.com/problem(s)-while-connecting-USRP2-with-GNURadio-tp32396111p32396111.html
Sent from the GnuRadio mailing list archive at Nabble.com.

2

On 04/09/11 10:32 AM, sumitstop wrote:

00:50:c2:85:42
Its says “destination host unreachable”
b. But when I do uhd_find_devices.py then the host broadcasts message but
glowing.Also the green light to the left of the Ethernet cable keeps

Let me know what more I should try.

Sumit Kr.
Research Assistant
Communication Research center
IIIT Hyderabad
India

There are two different APIs for the USRP2 family–the original
“classic” API, which uses raw ethernet
frames, and the newer UHD API, which uses a UDP/IP based
communications protocol. Only the
UHD API supports IP, and will thus respond to pings, and
uhd_usrp_probe requires that the device be
running the UHD firmware.

If you ran the build-gnuradio script, the UHD firmware for the USRP2
will be in:

/usr/local/share/uhd/images/usrp2_fpga.bin
/usr/local/share/uhd/images/usrp2_fw.bin

The two “worlds” (non-UHD and UHD) aren’t mutually compatible.
Applications that were written for
the “classic” API for USRP2 will not work unmodified for the UHD API,
and the device has to have its
firmware upgraded to run the UHD-based firmware, as shown above.

–
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

3

A bunch of thanks Marcus… I never guessed that this was the problem…
its solved now.

Marcus D. Leech wrote:

with
It returns linux; GNU C++ version 4.4.3; Boost_104000;

device
do
Raw Ethernet rel-20100603 d488c6b2 June 3, 2010

“classic” API, which uses raw ethernet
/usr/local/share/uhd/images/usrp2_fw.bin
Principal Investigator

Sumit Kr.
Research Assistant
Communication Research center
IIIT Hyderabad
India

View this message in context:
http://old.nabble.com/problem(s)-while-connecting-USRP2-with-GNURadio-tp32396111p32397124.html
Sent from the GnuRadio mailing list archive at Nabble.com.

4

Hello Sumit

I am using USRP2 board and trying to communicate but facing the same
problems u
have discuss here and also read the answer of Marcus to your problem but
still
confused and i am using UHD API. So,please can u discuss it more
precisely.

Harsh Shah
India

5

Marcus D. Leech <mleech ripnet.com> writes:

If you are using the UHD API on the host-side, and haven’t upgraded the
firmware on the USRP2 to
the appropriate, matching, UHD firmware/FPGA image, then UHD-based
things won’t work.

You need to upgrade your USRP2 to the UHD firmware:

http://files.ettus.com/uhd_docs/manual/html/usrp2.html#load-the-images-onto-the-sd-card-usrp2-only

If you ran my “build-gnuradio” script, it will have left the firmware
images in /usr/local/share/uhd/images

ohk… i will try the whole process and discuss about it soon.
Thank you.

6

If you are using the UHD API on the host-side, and haven’t upgraded the
firmware on the USRP2 to
the appropriate, matching, UHD firmware/FPGA image, then UHD-based
things won’t work.

You need to upgrade your USRP2 to the UHD firmware:

http://files.ettus.com/uhd_docs/manual/html/usrp2.html#load-the-images-onto-the-sd-card-usrp2-only

If you ran my “build-gnuradio” script, it will have left the firmware
images in /usr/local/share/uhd/images

–
Marcus L.
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

7

Marcus D. Leech <mleech ripnet.com> writes:

If you are using the UHD API on the host-side, and haven’t upgraded the
firmware on the USRP2 to
the appropriate, matching, UHD firmware/FPGA image, then UHD-based
things won’t work.

You need to upgrade your USRP2 to the UHD firmware:

http://files.ettus.com/uhd_docs/manual/html/usrp2.html#load-the-images-onto-the-sd-card-usrp2-only

If you ran my “build-gnuradio” script, it will have left the firmware
images in /usr/local/share/uhd/images

i am using the method discuss in below file (UHD only) to load the
image on the
sd card for usrp2.

www.csun.edu/~skatz/katzpage/sdr…/loading_sd_card_image.pdf