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Re: [Discuss-gnuradio] how send random values to selector every n-times

From: Vitt Benv
Subject: Re: [Discuss-gnuradio] how send random values to selector every n-times
Date: Mon, 8 Dec 2014 23:14:49 +0100

Thanks Sreeraj,

just a quick test without success :-(

I've tested the example in the tutorial and it work, so I've to read carefully the section to understand how put hand on my code.

Next days I'll be away for my job so next tests maybe done during next weekend.

I'll report results ;-)



2014-12-08 15:11 GMT+01:00 sreeraj r <address@hidden>:

Please go through the tutorial [1].

Short version,

1. Use one 5in-1out selector block 
2. Use on "Function Probe" block 
3. Set the "Poll Rate" based on your delay
4. Generate python file using "Generate flowgraph" button
5. Set your selector's input index in the function probe 
Sample function probe 

>>def _fn_probe_probe():
>>            while True:
>>                try:
>>                    self.blks2_selector_0.set_input_index(random.randint(0,4)) 
>>                except AttributeError:
>>                    pass
>>                time.sleep(1.0 / (0.3))

6.Run your python code 

[1] https://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorial_GNU_Radio_in_Python#315-Modifying-the-GRC-Generated-Python-File


On Sun, Dec 7, 2014 at 10:59 PM, Vitt Benv <address@hidden> wrote:
Hi everybody,
I need to "switch" randomly 5 different signal generator via selector block every [say] 3 seconds....

So , in GRC, I've a vector_source with values coming from [random.randint(0, 4) for p in range(0,4)]. This put some random values displayed right.

Now how I can scan the vector, a values at time sending this index to selector, every n-seconds ???

I'm not with a USRP , simple sound card.

Tnx in advance for any answer!


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