Re: [Discuss-gnuradio] UHD/antennas/device names/etc.

[bobb]

Josh,

  Thanks. That makes sense.

  --Bob

>-----Original Message-----
>From: Josh Blum [mailto:address@hidden
>Sent: Thursday, August 26, 2010 09:43 PM
>To: address@hidden
>Cc: address@hidden
>Subject: Re: [Discuss-gnuradio] UHD/antennas/device names/etc.
>
>Bob,
>
>----------------------------------------------------------
>So to make a device (lets say its at ip 192.168.10.2):
>----------------------------------------------------------
>
>uhd::device_addr dev_addr;
>dev_addr["addr"] = "192.168.10.2";
>uhd::usrp::simple_usrp::sptr my_device =
>uhd::usrp::simple_usrp::make(dev_addr);
>
>-- OR with a markup string --
>
>uhd::usrp::simple_usrp::sptr my_device =
>uhd::usrp::simple_usrp::make("addr=192.168.10.2");
>
>----------------------------------------------------------
>To set the RX antenna (WBX or RFX):
>----------------------------------------------------------
>
>my_device->set_rx_antenna("RX2");
>
>-- OR --
>
>my_device->set_rx_antenna("TX/RX");
>
>The error you got when setting the antenna indicates that you did
>my_device->set_rx_antenna("");
>However, a blank string is not a valid antenna name for those boards.
>You may also query for a list of possible antenna names with:
>std::vector<std::string> ants = my_device->get_rx_antenna_names();
>
>-Josh
>
>On 08/26/2010 05:21 PM, address@hidden wrote:
>> Josh,
>>
>>    No GRC. All C++. My C++ code is calling simple_usrp::make(dev).
>>
>>    --Bob
>>
>>> -----Original Message-----
>>> From: Josh Blum [mailto:address@hidden
>>> Sent: Thursday, August 26, 2010 07:53 PM
>>> To: address@hidden
>>> Cc: address@hidden
>>> Subject: Re: [Discuss-gnuradio] UHD/antennas/device names/etc.
>>>
>>> So im missing some context here. If you messing around in GRC, there is
>>> an antenna parameter in the uhd source block. That antenna parameter is
>>> a string that can be TX/RX or RX2. When set, it will generate a call in
>>> the python code that looks like uhd_source_object.set_antenna("RX2")
>>>
>>> That addr=192.168.xxxx stuff is just for identifying a device on your
>>> system. Its goes into the constructor for the block into the args
>>> parameter. There is no involvement of antennas whatsoever there.
>>>
>>> -josh
>>>
>>> On 08/26/2010 04:29 PM, address@hidden wrote:
>>>>
>>>>> -----Original Message-----
>>>>> From: Josh Blum [mailto:address@hidden
>>>>> Sent: Thursday, August 26, 2010 07:03 PM
>>>>> To: address@hidden
>>>>> Subject: Re: [Discuss-gnuradio] UHD/antennas/device names/etc.
>>>>>
>>>>>
>>>>>
>>>>> On 08/26/2010 03:27 PM, address@hidden wrote:
>>>>>> Welcome to the next level...
>>>>>>
>>>>>> I've gotten further. It's now failing with:
>>>>>>
>>>>>>
>>>>>> Oterminate called after throwing an instance of 'uhd::assert_error'
>>>>>>      what():  assertion failed:
>>>>>>       is not a valid rfx rx antenna name.
>>>>>>      possible values are: [TX/RX, RX2].
>>>>>>
>>>>>
>>>>> You need to pick from one of the antenna choices. If you leave a blank
>>>>> string it shouldnt try to set any antenna, so im not sure why you see
>>>>> the error at all because it looks like you used a blank/empty string.
>>>>>
>>>>> http://www.ettus.com/uhd_docs/manual/html/dboards.html#daughterboard-properties
>>>>>
>>>>>> I'm running with an RFX2400 (WBX will be my next victim).
>>>>>>
>>>>>
>>>>> antennas should be the same as RFX series
>>>>>
>>>>>> I've already discovered that (apparently) you can't do something like 
>>>>>> make("eth2") (like you could with the old driver), you need to give the 
>>>>>> IP address (however I've also discovered that "" also appears to work 
>>>>>> OK). Do I also need to include some sort of antenna info (i.e., whether 
>>>>>> I'm running half or full duplex)?
>>>>>>
>>>>>
>>>>> Its a device address, when left blank it will use whatever device it can
>>>>> find.
>>>>> http://www.ettus.com/uhd_docs/doxygen/html/classuhd_1_1device__addr__t.html
>>>>>
>>>>> The dboard properties link above should clue you into the full or half
>>>>> duplex stuff.
>>>>>
>>>>>> I've looked through the various headers and doxygen but haven't been 
>>>>>> able to figure out what I need to do to keep going.
>>>>>>
>>>>>
>>>>> What are you trying to do?
>>>>>
>>>>> -Josh
>>>>
>>>> I'm (just) trying to open a connection to a U2 + RFX2400 (full duplex).
>>>>
>>>> What I'm not getting (perhaps I'm just being dense) is how to express the 
>>>> antenna property in the string (i.e., apparently is can be "TX/RX" or 
>>>> "RX2", but does it take a prefix like the address does (i.e., "addr=")? If 
>>>> it does, what is it?).
>>>>
>>>> Again, sorry if I've overlooked something. I can tell I'm in the right 
>>>> ballpark, but I'm just not seeing it.
>>>>
>>>>     Thanks again,
>>>>
>>>>     --Bob
>>>>
>>>>
>>>>
>>>
>>
>>
>