Re: [Discuss-gnuradio] Error when trying to run two python programs simultaneously

[drcabrejos]

Thanks!

I'll try to make a custom app and see if I can get this working.

David Cabrejos


Josh Blum-2 wrote:
> 
> Ahh I see. The rule is, one process per usrp. Only one process can have 
> the usb handle, send/recv, and handle control per usrp device. 
> Therefore, you will have to make a custom app that combines the 
> utilities of tunnel.py and spectrum_sense.py
> 
> -Josh
> 
> 
> On 03/23/2010 09:52 AM, drcabrejos wrote:
>>
>> Josh,
>>
>> Thanks for the prompt reply.
>>
>> I tried using this command, but this command seems to be applied if I
>> have 2
>> USRPs connected to a single computer.
>>
>> On my case, I have 2 computers and 1 USRP connected to each computer.
>>
>> Each USRP have 2 RFX2400 daughterboards.
>>
>> I'm trying to run both programs "tunnel.py" and "usrp_spectrum_sense.py"
>> at
>> the same time, each one using a different daughterboard.
>>
>> tunnel.py would use side A while usrp_spectrum_sense.py would use side B.
>>
>> Then I got the error saying that the USB port was already in use and
>> would
>> not be able to run the second program.
>>
>> Would it be possible to run both programs simultaneously in 1 USRP. This
>> is
>> because on both sides I'd be doing the same thing. Spectrum sensing and
>> continuous communication.
>>
>> Thanks!
>>
>> David Cabrejos
>>
>>
>> Josh Blum-2 wrote:
>>>
>>>
>>>
>>> On 03/23/2010 07:46 AM, drcabrejos wrote:
>>>>
>>>> Hi All,
>>>>
>>>> I have 2 (two) USRP1 and 2 (two) RFX2400 connected to each USRP1.
>>>>
>>>> What I want to do is to have communication between the devices and scan
>>>> for
>>>> the spectrum simultaneously.
>>>>
>>>> If running programs one by one, all works great.
>>>> Running both at the same time, gives me an error saying that the USB
>>>> port
>>>> is
>>>> already being used.
>>>>
>>>>
>>>> Running: uses RFX2400 on port A
>>>> /usr/share/gnuradio/examples/digital/tunnel.py --freq 2.422G
>>>>
>>>>
>>>> Trying to start: uses RFX2400 on port B
>>>> /usr/share/gnuradio/examples/usrp/usrp_spectrum_sense.py -R B 2.4095G
>>>> 2.4625G
>>>>
>>>
>>> When you have multiple usrps, you need to differentiate them by using
>>> the "which" parameter:
>>>
>>> tunnel.py has this option on the command line:
>>>       -w WHICH, --which=WHICH
>>>                           select USRP board [default=0]
>>>
>>> try ./tunnel.py<your args here>  -w1
>>>
>>> spectrum_sense.py does not have this option, so it will have to be the 0
>>> by default or you will have to modify the script to pass which=<x>  into
>>> the usrp contructor.
>>>
>>> -josh
>>>
>>>
>>> _______________________________________________
>>> Discuss-gnuradio mailing list
>>> address@hidden
>>> http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>>
>>>
>>
> 
> 
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