Your reply gave me much inspiration.Given the "set_command_time" would
back-pressure all subsequent timed commands,would the data transmitting be suspended?
2013/3/4 Adeel Anwar <adeela...@gmail.com>:
> Gong,
>
> Attached is a simple freq-hopping example using timed-commands.
> U may need to change "freq_list " that should match ur RF-Daughter card
>
>
> -Adeel
>
> On Mon, Mar 4, 2013 at 5:18 PM, Gong Zhang <zhang...@gmail.com> wrote:
>>
>> 2013/3/4 15:56, Josh Blum wrote:
>>>
>>>
>>> On 03/03/2013 09:28 PM, Gong Zhang wrote:
>>>>
>>>> Hi,
>>>> I wanna transmit a 1khz Sinusoidal signal for one second and transmit
>>>> 2khz for another second.The code maybe something like this:
>>>> set_command_time(&mytime)
>>>> sig_sin_source.work(...)
>>>> set_command_time(&mytime+1)
>>>> sig_sin_source.work(...)
>>>> But as I know,the first set_command_time would back-pressure all
>>>> subsequent timed commands.This would make it impossible for the second
>>>> set_command_time to reach the USRP buffer in time.
>>>> Is it correct?And what's the suggestion?
>>>> I appreciate any tips.
>>>> Thank you.
>>>>
>>> For timing the transmission of samples you will want to use the stream
>>> tagging feature of gnuradio (some examples and docs in the link):
>>>
>>>
http://code.ettus.com/redmine/ettus/projects/uhd/wiki/GNU_Radio_UHD#Using-UHD-Software-with-GNU-Radio
>>>
>>> The timed commands thing is really for timing settings like tuning the
>>> device, or setting gain at a specific time, its separate from the
>>> streaming interface.
>>>
>>> -josh
>>>
>> Thank you for your valuable feedback.//If I wanna retune the device every
>> second,it really has nothing to do with data stream.Maybe I should refer to
>> python or UHD.Can you give me some example?
>>
>>
>>
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>
>
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