Re: [Discuss-gnuradio] how to get started with python in gnuradio

On Sun, Jun 9, 2013 at 9:48 PM, vamshi krishna dodla wrote: > Hi all > It would be very helpful to me if some one tells me how to get started with > python in gnu radio.I see an entire page dedicated to python programming but > it does not say anything about getting started.Please don't say to use

Re: [Discuss-gnuradio] out of tree module with code generation problem

On Sat, Jun 8, 2013 at 1:49 PM, Achilleas Anastasopoulos wrote: > I have an out of tree module and I want to create a block > that is automatically expanded for different input/output types. > > I have changed all CMakeList.txt files according to > gr-blocks directory. > > However "make" complaint

Re: [Discuss-gnuradio] about gps lock

I have done more tests about the gps message. while(1){ sleep(1); std::cout << usrp->get_mboard_sensor("gps_gprmc",0).to_pp_string() << std::endl; } For the output, at the beginning, there are gps_gprmc message outputs but after it runs for a while, there would be n

Re: [Discuss-gnuradio] Tun/Tap Problem while Running tunnel.py while wireshark recognizes

On Thu, Jun 6, 2013 at 3:22 PM, Jay Prakash wrote: > We are working on establishing a tunnel for MAC protocol design using > tunnel.py given as example in GNU Radio but are unable to receive ping reply > from the other node. > > We created tun/tap interface using ./tunnel.py -f 990M and ipconfig >

Re: [Discuss-gnuradio] How to save/read sc8 format to/from file and convert it to complex float 32?

On Thu, Jun 6, 2013 at 11:46 AM, Michael Ossmann wrote: > On Thu, Jun 06, 2013 at 11:27:02AM -0400, Josh Blum wrote: >> >> A block that implements this conversion w/ a configurable scalar would >> be ideal. > > That would be very nice. I've been using (for input from sc8 file to a > complex flowg

Re: [Discuss-gnuradio] GnuRadio + EveryCircuit?

On Wed, Jun 5, 2013 at 2:00 PM, Joel Mayer wrote: > Here is a link to an Android ap called: EveryCircuit > > http://www.everycircuit.com/ > > My question is, if I learn how to design circuits > on this application, will I gain insights into the > subtleties of gnuradio? Hedging here with a... may

Re: [Discuss-gnuradio] Detecting underflows with uhd_usrp_sink

Do late packets always get dropped by the USRP? What happens if its buffers get filled up with samples, all of which are late? "Marcus D. Leech" wrote: >> L = late packet, there was a time on the packet which was> time on >> device when >> >> >There are two different "cases" for late packets h

Re: [Discuss-gnuradio] Detecting underflows with uhd_usrp_sink

I believe that they are all dropped, but Josh can comment more definitively.   on Jun 10, 2013, Sean Nowlan wrote: Do late packets always get dropped by the USRP? What happens if its buffers get filled up with samples, all of which are late?"Marcus D. Leech" wrote:>> L = late p

Re: [Discuss-gnuradio] Detecting underflows with uhd_usrp_sink

See this post in context http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/2012-September/005352.html On Mon, Jun 10, 2013 at 7:13 AM, Marcus Leech wrote: > I believe that they are all dropped, but Josh can comment more > definitively. > > > on Jun 10, 2013, *Sean Nowlan* wrote: > >

Re: [Discuss-gnuradio] Tun/Tap Problem while Running tunnel.py while wireshark recognizes

Yes I have tested using different frequency.No help. And while debugging I figured out that PHY layer receives the packet from transmitter sent as ping ICMP packets and decodes the sender's address. After that it writes to the tun/tap. But tun/tap reply is unavailable. Ie there is some problem in

[Discuss-gnuradio] gnuradio-companion

I am new to gnuradio. Can i get this channel as a block in gnuradio-companion. http://gnuradio.org/redmine/projects/gnuradio/repository/revisions/d5168150815339f0d3b117bcfb4d2c4265d15b33/diff/gnuradio-core/src/python/gnuradio/blks2impl/channel_model.py _

Re: [Discuss-gnuradio] gnuradio-companion

On Mon, Jun 10, 2013 at 11:50 AM, Pratik Kumar wrote: > I am new to gnuradio. > Can i get this channel as a block in gnuradio-companion. Depends on what version you are using, but most likely, yes. In the "Blocks" list on the right hand side of gnuradio-companion you can find this under "Channel

Re: [Discuss-gnuradio] gnuradio-companion

Assuming you're using a recent version of GRC, just start typing in the blocks window which enables a search.  So typing "channel model" here will take you to the channel model.   on Jun 10, 2013, Pratik Kumar wrote: I am new to gnuradio. Can i get this channel as a block in gnuradio-companion.  

Re: [Discuss-gnuradio] Detecting underflows with uhd_usrp_sink

On 06/10/2013 09:43 AM, Sean Nowlan wrote: > Do late packets always get dropped by the USRP? What happens if its buffers > get filled up with samples, all of which are late? The stream args have a policy parameter. Also, these args can be set from a parameter in the USRP GRC blocks, as well as

[Discuss-gnuradio] Regarding exponential operator in gnuradio

Hi all, does gnuradio have an exponential operator (like e^jw). If not how to implement it in gnuradio. -- Thanks & Regards Vamshi Krishna Dodla ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-g

Re: [Discuss-gnuradio] Detecting underflows with uhd_usrp_sink

On 06/10/2013 01:17 PM, Josh Blum wrote: On 06/10/2013 09:43 AM, Sean Nowlan wrote: Do late packets always get dropped by the USRP? What happens if its buffers get filled up with samples, all of which are late? The stream args have a policy parameter. Also, these args can be set from a parame

Re: [Discuss-gnuradio] Regarding exponential operator in gnuradio

I think there's a generic "transcendental" block that actually allows you to call anything in libm.   It may be slow.   on Jun 10, 2013, vamshi krishna dodla wrote: Hi all, does gnuradio have an exponential operator (like e^jw). If not how to implement it in gnuradio. -- Thanks & Regards Vamsh

Re: [Discuss-gnuradio] Detecting underflows with uhd_usrp_sink

> > Ok, makes sense. So lets say I scheduled 20 minutes of bursts (1 second > period with 50/50 duty cycle) and I started the flowgraph 10 minutes > late. With the "next_burst" policy, could I rely on the USRP to > dutifully drop all late bursts? Are the packets dropped in the Ethernet > buffer o

Re: [Discuss-gnuradio] gnuradio software architecture

Thanks for the link. I got the idea of gnuradio scheduler. top_block calls start which creates gnuradio_scheduler which topological sort the flowgraph and create threads for each block according to sort. But it did'nt explain how blocks are connected .I know that publish and subscribe are used to c

[Discuss-gnuradio] USRP_N200 unable to connect via vmplayer

I have vmplayer virtual machine running on my computer as my system is GPT partition style and which is not taking dual boot of any release of ubuntu. I connect to an ethernet port to a USRP rx... and do a uhd_find_devices .. it says no device found.. although I have a valid gnuradio distro +uhd o

[Discuss-gnuradio] reg. PSK Mod Block in Gnu radio

http://gnuradio.squarespace.com/storage/tutorial/rondeau-costterra2.pdf Hi all, why does the output of PSK Mod block is imperfect, compared to theoritical QPSK constellation.( iam implementing qpsk with 4 sampl/sym and 4 constellation points).The experiment im doing is the same in link ( http://g

Re: [Discuss-gnuradio] reg. PSK Mod Block in Gnu radio

On 06/10/2013 07:25 PM, vamshi krishna dodla wrote: http://gnuradio.squarespace.com/storage/tutorial/rondeau-costterra2.pdf Hi all, why does the output of PSK Mod block is imperfect, compared to theoritical QPSK constellation.( iam implementing qpsk with 4 sampl/sym and 4 constellation points

Re: [Discuss-gnuradio] USRP_N200 unable to connect via vmplayer

> Date: Mon, 10 Jun 2013 18:00:21 -0400 > From: ankan...@gmail.com > To: discuss-gnuradio@gnu.org > Subject: [Discuss-gnuradio] USRP_N200 unable to connect via vmplayer > > I have vmplayer virtual machine running on my computer as my system is > GPT partition

Re: [Discuss-gnuradio] reg. PSK Mod Block in Gnu radio

On 06/10/2013 08:13 PM, vamshi krishna dodla wrote: can you please reply When I'm good and ready. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org ___ Discuss-gnuradio mailing list Discuss-gnurad

Re: [Discuss-gnuradio] make test errors

The CPU on the laptop is an Intel i3-2350M (64 bit). What steps should I take (or where can I learn how) to resolve the problem with Volk? Dave From: Tom Rondeau To: Botany Dave Sent: Monday, June 10, 2013 6:41 AM Subject: Re: [Discuss-gnuradio] make test

Re: [Discuss-gnuradio] make test errors

Run volk/lib/test_all from the build dir If a kernel fails, it will tell you which one, start commenting out its implementations in the source dir volk/kernels/volk/volk_*.h until the test works. We narrow down suspect implementation and fix. -josh On 06/10/2013 09:57 PM, Dave L wrote: > The CPU

Re: [Discuss-gnuradio] Regarding exponential operator in gnuradio

http://gnuradio.org/doc/doxygen/gr__expj_8h_source.html On Monday, June 10, 2013, vamshi krishna dodla wrote: > Hi all, does gnuradio have an exponential operator (like e^jw). If not how > to implement it in gnuradio. > > > -- > Thanks & Regards > Vamshi Krishna Dodla > __

[Discuss-gnuradio] pre-cog source doubt

I was looking at the source of pre-cog and there is this piece of code which i am not able to locate ( pmt_mgr() ) in the documentation. self.mgr = pmt.pmt_mgr() for i in range(64): self.mgr.set(pmt.pmt_make_blob(1)) blob = self.mgr.acquire(True ) There is no reference of pmt_mgr in

Re: [Discuss-gnuradio] pre-cog source doubt

Okay I found in older grextras ( https://github.com/ncorgan/grextras/blob/master/include/gruel/pmt_mgr.h) /* * * Manage a collection of PMTs -> memory wise * * When a PMT reference count becomes zero, the pmt and con

Re: [Discuss-gnuradio] Tun/Tap Problem while Running tunnel.py while wireshark recognizes

Hi Jay and Tom, we too are having similar issues in communicating between two USRP's using tunnel.py. we fiddled a lot with the gain values, changed frequencies, modified delay variables in the code but found that even though there is pretty good full duplex communication of

Re: [Discuss-gnuradio] USRP_N200 unable to connect via vmplayer

Hi, Check if your usrp is surely on 192.168.10.3. Run uhd_usrp_probe and check if it is giving any output. Do you have gigabit ethernet card on your laptop. If not, you will have to use a switch in between and some times switch might be an issue. one more thing, are you connected on static ip?

Re: [Discuss-gnuradio] USRP_N200 unable to connect via vmplayer

1. I tried using vm bridged connection over NAT.. i assigned 192.168.10.1 and subnet 255.255.255.0 in the ubuntu network setting running on vmplayer.. I am pretty much sure about the other USRP IP since.. i used some other machine to do uhd_find_devices .. so check for their IPs.. 2. My ethernet po

Re: [Discuss-gnuradio] USRP_N200 unable to connect via vmplayer

On 06/11/2013 02:19 AM, Ankan Roybardhan wrote: > 1. I tried using vm bridged connection over NAT.. i assigned 192.168.10.1 > and subnet 255.255.255.0 in the ubuntu network setting running on > vmplayer.. I am pretty much sure about the other USRP IP since.. i used > some other machine to do uhd_