Re: [Discuss-gnuradio] Adding a custom modulation

[LianFeier]

________________________________
> Date: Sun, 7 Apr 2013 22:00:40 -0500 
> Subject: Re: [Discuss-gnuradio] Adding a custom modulation 
> From: address@hidden 
> To: address@hidden 
> CC: address@hidden 
> 
> On Sun, Apr 7, 2013 at 8:00 PM, 连非儿 
> <address@hidden<mailto:address@hidden>> wrote: 
> 
> Hi. 
> 
> 
> I am testing my custom modulation scheme ppm.py. I followed this 
> post http://lists.gnu.org/archive/html/discuss-gnuradio/2010-12/msg00265.html 
> 
> to register this modulation into mods/demods. I added a line 
> 
> 
> import ppm 
> 
> 
> in my benchmark_tx.py. 
> 
> 
> I also tried placing the ppm.py file in blks2impl directory. However 
> neither method worked. The result from "print 
> digital.modulation_utils.type_1_mods()" did not contain ppm. 
> 
> 
> Another issue is that I modified digital_constellation.cc, and I called 
> functions in the modified digital_constellation.cc in my ppm.py. In 
> this case should I rebuild gnuradio? If not, what should I do? 
> 
> 
> Any suggestions? 
> 
> Thanks! 
> 
> 
> Fei 
> 
> 
> Hi Fei, 
> 
> The issue is that in the directory benchmark scripts are in isn't aware 
> of your ppm file. You have a few options that you can explore by 
> searching around for python import path or search path. and doing some 
> reading. You can take a look in gr-digital/python/__init__.py to see 
> how the other mod/demods are imported. Adding a line in that file "from 
> ppm import *" should make your ppm stuff show up in Python after 
> rebuilding gnuradio. 
> 
> And yes, you should rebuild gnuradio. Any time you change C++ source 
> code you must rebuild it. 
> 
> -Nathan 
>

Hi Nathan,

I've made my ppm a usable module in digital after rebuild.  Thanks for your 
help!

Fei