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 <s.aqeelr...@gmail.com>
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 <s.aqeelr...@gmail.com>
> 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 <s.aqeelr...@gmail.com>
>> 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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