Re: [Discuss-gnuradio] guided tutorials - problem with tutorial 3

[Kartik Patel]

Hi Jacqueline,

I was able to run all attached files. I even tried your steps in tutorial3_investigation, but couldn't reproduce the error. Hence, I believe it is the problem during the build. Also, it is not the error because of tb = if_else() line.

Can you run make test command from the build directory? If no, then please provide the logs for the same.

Also, please share the output of the command "cmake ../".

Regards,

Kartik Patel

On Thu, Jan 12, 2017 8:25 PM, Jacqueline.Walker address@hidden wrote:

Hi Kartik,

 

Well, no I would think there ought not be an error in the tutorial, but the fact remains that if I run the ‘if_else_mod.py’ from the ~/solutions/gr-tutorial/examples/tutorial3/python/ folder I get the exact same runtime errors, so it might be something in the build.  I attach my own if_else_mod.py file which has been produced by my firstly generating if_else.py from the flowgraph which I have built as instructed in the tutorial and then doing exactly as instructed in the tutorial the modifications to the def _variable_function_probe_0_probe():.

I also attach the ‘solutions’ version of the if_else_mod.py (called if_else_mod_orig.py) and a file which summarises investigations made so far and the results of Kompare to discover the differences in the code. Clearly the grc generates code which differs somewhat from the samples in the ~/python directory (which are from an older version, clearly). 

I don’t know if it is anything to do with the ‘tb = if_else’ line – I am about to test that out.

Thanks

Regards

Jacqueline

 

 

From: Kartik Patel [mailto:address@hidden
Sent: 11 January 2017 21:32
To: Jacqueline.Walker; address@hidden
Subject: Re: [Discuss-gnuradio] guided tutorials - problem with tutorial 3

 

Hi Jacqueline,

I don't think there's error in the tutorial. Please send your GRC or Python file.

Thank you.

Regards,
Kartik Patel

 

On 10:54PM, Wed, Jan 11, 2017 Jacqueline.Walker <address@hidden> wrote:

Hello,

 

Trying the tutorial three – python in gnu radio and the ‘if_else’ mod file. I get this run-time error even with the tutorial/solutions file so it might be a build thing.

 

Basically when it runs with the added if val == 1: block it raises an

Attribute error top_block_sptr has no attribute named analog_sig _x1_source block – (sorry not correctly copied but you get the idea hopefully) – in other words it does not recognise the analog signal source that you have and that you are trying to modify the freq and/or amplitude of under control of the simple if/else using the probe_signal variable as outlined in the tutorial.

Is there something missing in the build or is it some error in the file/instructions in the tutorial?

 

Thanks

Jacqueline

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

--

Regards,
Kartik Patel
B.Tech. Final Year
Electronics and Communication Engineering
Indian Institute of Technology, Roorkee