Re: [Discuss-gnuradio] stop() the flow graph

[Vanush Vaswani]

Try putting wait() after stop() to make sure the resources are teared down.

On Sat, Nov 15, 2014 at 6:56 PM, Syed Aqeel Raza <address@hidden> wrote:
> Hi,
>
> Currently, I am using a single usrp as a transmitter. The program is
> changing the transmission frequency with respect to (external) switching
> time. In order to change the frequency in usrp box; I set the following
> programming conditions.
>
> while 1:
>     if ((time!=0) and ((ch1=1) or (ch2==1))):
>           tb1.start()
>           time = int(time) - int(1)
>           sleep(external time which provide the active channel time of
> channel 1 and channel 2)
>    elif (time==0):
>           tb1.stop()
>
> But (I think) due to this frequent start() and stop() activities; after
> maximum of 15 minutes time I have received the following error.
>
> /Traceback (most recent call last):
> File "source_test.py", line 121, in <module>
> tb1 = gmsk_tx()
> File "source_test.py", line 88, in __init__
> self.blocks_udp_source_0 = blocks.udp_source(gr.sizeof_char*1, "127.0.0.1",
> 1234, 1472, True)
> File
> "/usr/local/lib/python2.7/dist-packages/gnuradio/blocks/blocks_swig5.py",
> line 1969, in make
> return _blocks_swig5.udp_source_make(*args, **kwargs)
> RuntimeError: boost::thread_resource_error: Resource temporarily unavailable
>
> I want the program to be run continuously. Kindly propose some solution.
>
> Regards,
> Syed Aqeel Raza
>
> On Thu, Nov 13, 2014 at 6:32 PM, Syed Aqeel Raza <address@hidden>
> wrote:
>>
>> I can't use sleep() here; because there're other threads as well in the
>> program which need to be executed as well. Sleep() stop the execution of
>> program; which is not a solution. Thanks.
>>
>> On Thu, Nov 13, 2014 at 5:53 PM, Syed Aqeel Raza <address@hidden>
>> wrote:
>>>
>>> Thanks Sylvain for your reply; but if I introduced sleep(14) then during
>>> that time it won't perform the tasks in tb1 as well.
>>>
>>> On Thu, Nov 13, 2014 at 3:28 PM, Syed Aqeel Raza <address@hidden>
>>> wrote:
>>>>
>>>> Hi All,
>>>>
>>>> I am looking for a solution that start() the flow graph for a definite
>>>> period of time (in seconds) and after that it stop() it automatically. For
>>>> example
>>>>
>>>> # let suppose initial value of time is 14 seconds; it means that the
>>>> flowgraph defined in tb1 should need to executed during that time; and when
>>>> the time reaches zero it must be stop.
>>>>
>>>> while 1:
>>>>     if (time!=0):
>>>>           tb1.run()
>>>>           time = int(time) - int(1)
>>>>     elif (time==0):
>>>>           tb1.stop()
>>>>
>>>>
>>>> I tried this; but once the flow graph started; then it never comes to
>>>> the elif condition. How can I stop() the flowgraph in this condition.
>>>> Waiting for reply.
>>>>
>>>> Regards,
>>>>
>>>>
>>>>
>>>
>>>
>>
>
>
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