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List:       gnuradio-discuss
Subject:    Re: [Discuss-gnuradio] USRP2 unable to receive signal at RX-B
From:       Josh Blum <josh () joshknows ! com>
Date:       2010-08-28 18:24:01
Message-ID: 4C795441.5090707 () joshknows ! com
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On 08/28/2010 10:38 AM, Cheaw Wen Guey wrote:
> Thanks Josh.
>
> Found that line of code.
>
> Following your advice, I have tried both methods you mentioned and have
> run into problems for both.
>
> For the first one, I have followed the install instructions for microblaze
> toolkit given on the gnuradio wiki and after setting the path, I tried to
> configure. usrp2-firwmare failed and the reason that wwas showned was that
> they failed to detect mb tools.
>

Try running mb-gcc from the command line first. See if you can do: 
mb-gcc --help

Once that works, you run the commands (configure.gnu -- not configure -- 
weird I know...):

cd usrp2/firmware
./bootstrap
./configure.gnu
make

Since you are building FPGA images (I assume you have a copy of ISE), 
then you may just want to use the mb-gcc that comes with Xilinx EDK.

> I then tried to install UHD and I managed to copy the firmware and FPGA
> configuration into the card and I managed to verify by pinging the USRP2.

good

> I am however unable to run any of the cpp files even as root as permission
> is denied.
>

Why are you trying to execute c++ files?

-Josh

> I am asking for help if there is anyone who has a modified binary firmware
> file compiled for the gnuradio version that I can have. I also would like
> to ask for help to compile a modified FPGA image.
>
> Thanks
>> I believe that the gnuradio usrp2 driver defaults to using only RXA for
>> the BasicRX board. This can be changed by modifying this value in
>> firmware for lib/db_basic.c to be "true" for the following line:
>> .base.is_quadrature = false,
>>
>> As an alternative, I recommend trying the UHD:
>> http://ettus-apps.sourcerepo.com/redmine/ettus/projects/uhd/wiki The
>> basic board defaults to using both RXA and RXB, and the selection is
>> software configurable.
>>
>> -Josh
>>
>> On 08/26/2010 03:48 AM, Cheaw Wen Guey wrote:
>>> Hi all,
>>>
>>> I started testing my USRP2 at a lower frequency. I have a function
>>> generator generate a 10MHz sine wave on RX-A and RX-B.
>>>
>>> However, I am unable to see the signal when I run usrp2_fft.py. To
>>> confirm, I disconnected the signal from RX-A and still nothing. I can
>>> only
>>> trace the signal as far as the signal transformer as the ADC is under the
>>> Basic-RX board.
>>>
>>> Is the USRP2 only able to receive on RX-A or is the board defective?
>>>
>>> Thanks in advance.
>>>
>>> Cheaw Wen Guey
>>> Research Officer
>>
>>
>> _______________________________________________
>> Discuss-gnuradio mailing list
>> Discuss-gnuradio@gnu.org
>> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
>
> Cheaw Wen Guey
> Research Officer
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> Discuss-gnuradio@gnu.org
> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio


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