[Discuss-gnuradio] Slider variable problem
Hello guys, I have created my block but which takes a variable N. I want to change this variable using the slider variable, I understand that I need to define a callbacksetVariable(N)/callback but at runtime I get error the this is not defined in the myblock_sptr module. I added the function in the inside the constructor *.h, at the bottom of the *.cc file and the callback tag. Can you help me with, please? Cheers, ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] How to use forecast()?
Hi Eric,
I have a similar issue as the one described above and I have read some of
the examples in the directory provided but they seem to be different from
what I want to implement. I want to collect L samples from N channels and
store them in a buffer, do processing and output a vector of length N. I
wrote the following code but it doesn't seem to be working properly. Some of
them use loops from i=0 to noutput_items*vlen while others use from 0 to
noutput_items. Also some of them don't use the function memcpy.
I am using gr_sync_decimator with set_decimation(L) is written in the block
constructor.
---
int my_package::work(.) {
gr_complexd *out =(gr_complexd *) output_items[0];
const gr_complex *in[N];
for (unsigned int i = 0; iN; i++)
in[i] = (const gr_complex *) input_items[i];
for (int i = 0; i noutput_items; i++){
for(unsigned int k=0; kN; k++)
memcpy(inbuffer[k][0],in[k][i*L],L*sizeof(gr_complex)); //inbuffer is
NxL matrix
//Signal processing of inbuffer and storing the result in a
vector
// out_vector of length vect_lengx;
memcpy(out, out_vector.at(0),
vect_lengx*sizeof(gr_complexd));
out+=vect_lengx;
}//end for
return noutput_items;
}
--
Can you help me with this please?
Thanks a lot.
Sammour
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RE: [Discuss-gnuradio] Using gr_sync_decimator [was: How to use forecast()?]
This is my block's constructor:
my_package::my_package(int num_input_ports, int L_samples)
: gr_sync_decimator(
package,
gr_make_io_signature(2, 5, sizeof(gr_complex)),
gr_make_io_signature(1, 1 ,
num_input_ports*num_input_ports*sizeof(gr_complexd)),
L_samples) {
// global variables
N=num_input_ports;
vect_lengx=N*N;
L=L_samples;
set_decimation(L);
}
Best regards,
Sam
Date: Fri, 6 Aug 2010 10:21:38 -0700
From: e...@comsec.com
To: samy-1...@live.com
CC: Discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] Using gr_sync_decimator [was: How to use
forecast()?]
On Fri, Aug 06, 2010 at 06:32:32AM -0700, Sammour wrote:
Hi Eric,
I have a similar issue as the one described above and I have read some of
the examples in the directory provided but they seem to be different from
what I want to implement. I want to collect L samples from N channels and
store them in a buffer, do processing and output a vector of length N. I
wrote the following code but it doesn't seem to be working properly. Some of
them use loops from i=0 to noutput_items*vlen while others use from 0 to
noutput_items. Also some of them don't use the function memcpy.
I am using gr_sync_decimator with set_decimation(L) is written in the block
constructor.
gr_sync_decimator with decimation == L correct, given what you've described.
Can you please show the beginning of your constructor, where you pass the
arguments to gr_sync_decimator's constructor?
Eric
---
int my_package::work(.) {
gr_complexd *out =(gr_complexd *) output_items[0];
const gr_complex *in[N];
for (unsigned int i = 0; iN; i++)
in[i] = (const gr_complex *) input_items[i];
for (int i = 0; i noutput_items; i++){
for(unsigned int k=0; kN; k++)
memcpy(inbuffer[k][0],in[k][i*L],L*sizeof(gr_complex)); //inbuffer is
NxL matrix
//Signal processing of inbuffer and storing the result in a
vector
// out_vector of length vect_lengx;
memcpy(out, out_vector.at(0),
vect_lengx*sizeof(gr_complexd));
out+=vect_lengx;
}//end for
return noutput_items;
}
--
Can you help me with this please?
Thanks a lot.
Sammour
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Re: [Discuss-gnuradio] complex vector output of a block
Well, I think I used io_signature correctly. And, as I am using gr_sync_block, I dont need to worry about forecast, set_output_multiple or gr_sync_decimator. (I hope this understanding is correct?!) I have read the how to write a block and followed what's in there, but if you guide me to better documentation, I will be very grateful. Cheers, Sam Eric Blossom wrote: On Sat, Jun 12, 2010 at 03:40:21PM -0700, Sammour wrote: Thanks for everyone, I sorted the problem out. I needed to increment out after memcpy and then return noutput_items/(N*N). Cheers, Sam OK. Glad you (think) you solved your problem. Given that your block was asked to compute noutput_items, why are you only computing (and/or returning) noutput_items/(N*N) items? Doing it this way is increasing the runtime overhead by something on the order of N*N. This smells like there's something that you don't understand about io_signatures, forecast, work, set_output_multiple and/or gr_sync_decimator... Eric ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio -- View this message in context: http://old.nabble.com/complex-vector-output-of-a-block-tp28828557p28869890.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] GRC: Need help in plotting a vector vs index
Dear engineers, I wonder if there's a way to plot a vector content vs. index in GRC? I mean analogous to MATLAB command: a=1:100; plot(a); Thanks Sam _ http://clk.atdmt.com/UKM/go/19780/direct/01/ Do you have a story that started on Hotmail? Tell us now___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
RE: [Discuss-gnuradio] complex vector output of a block
Thanks for everyone, I sorted the problem out. I needed to increment out
after memcpy and then return noutput_items/(N*N).
Cheers,
Sam
Sammour wrote:
Hi John, Thanks for the message sorry for using MATLAB notation without
clarification 2:12 = from 2 upto 12.
To simplify the case, I wrote the following code that actually carry the
same problem concept:
*
#ifdef HAVE_CONFIG_H
#include config.h
#endif
#include arraycomms_construct_rxx_vcc.h
#include gr_io_signature.h
arraycomms_construct_rxx_vcc_sptr arraycomms_make_construct_rxx_vcc (int
input_ports){
return arraycomms_construct_rxx_vcc_sptr (new
arraycomms_construct_rxx_vcc (input_ports));
}
unsigned int N=0;// number of input ports
arraycomms_construct_rxx_vcc::arraycomms_construct_rxx_vcc (int
num_input_ports)
: gr_sync_block (construct_rxx_vcc, gr_make_io_signature (2, 12,
sizeof(gr_complex)),
gr_make_io_signature (1,1 ,
num_input_ports*num_input_ports*sizeof(gr_complex))){
N=num_input_ports;
}
arraycomms_construct_rxx_vcc::~arraycomms_construct_rxx_vcc (){}
int arraycomms_construct_rxx_vcc::work (int noutput_items,
gr_vector_const_void_star input_items,
gr_vector_void_star output_items)
{
gr_complex *out =(gr_complex *) output_items[0];
gr_complex out_vector [N*N];
const gr_complex *in[N];
for (unsigned int i = 0; iN; i++)
{
in[i] = (const gr_complex *) input_items[i];
}
for (int i = 0; i noutput_items; i++){
unsigned int index = 0;
for (unsigned int n =1; n=N*N; n++){
out_vector[index]=gr_complex(4, 0);
index++;
}
}
memcpy(out, out_vector, N*N*sizeof(gr_complex));
return noutput_items;
}
*
This code is supposed to generate a vector of 4 elements ( I used N=2 in
the GRC) with each element = 4+j0 whatever the input is. However, the
content of the sink file is:
4.000e+00
4.000e+00
4.000e+00
4.000e+00
0.000e+00
0.000e+00
0.000e+00
0.000e+00
0.000e+00
0.000e+00
.
4.000e+00
4.000e+00
4.000e+00
4.000e+00
0.000e+00
0.000e+00
0.000e+00
0.000e+00
0.000e+00
0.000e+00
I hope the situation is now clearer.
Cheers,
Sam
To: samy-1...@live.com; g...@toad.com
Subject: Re: [Discuss-gnuradio] complex vector output of a block
Date: Wed, 9 Jun 2010 16:49:15 -0700
From: g...@toad.com
Thanks for replying. N is designed to be 2:12.
Maybe others understand what you're saying, but 2:12 doesn't mean
anything
to me. Do you mean between 2 and 12? Or is this a Biblical reference,
or perhaps the time of day?
I suggest that you just post the code that's giving you the trouble
(either in an email, or if it's more than about 200 lines, put it on
a web site or pastebin or wiki and email a URL for it). Trying to
debug somebody else's code piecemeal by asking little questions is
unlikely to lead to success.
John
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Re: [Discuss-gnuradio] gnuradio.org seems to be down
Well, it seems to be working here! Martin Dvh wrote: The gnuradio.org server seems to be down. (9 Jun 2010) Even a ping times out. Martin ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio -- View this message in context: http://old.nabble.com/gnuradio.org-seems-to-be-down-tp28828846p28828897.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] complex vector output of a block
Dear Martin, Thanks for replying. N is designed to be 2:12. The block uses a number of inputs (N) to update a matrix that I am sending to the output as a vector that will be reshaped in the next block when it is used. Do you think that my programme takes much time to execute? Cheers, Sam -- View this message in context: http://old.nabble.com/complex-vector-output-of-a-block-tp28828557p28830131.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] complex vector output of a block
To isolate the problem, I removed all the complex code and wrote the
following in work() to generate a vector of random numbers:
gr_complex *out =(gr_complex *) output_items[0];
unsigned int index = 0;
for (unsigned int m =1; m=4; m++)
{
*(out+index)=gr_complex(std::rand(), std::rand());
index++;
}
return noutput_items;
Here, I get a bunch of complex numbers followed by many zeros followd by
many complex numbers. The number in each group is not constant.
Any suggestions to control this?
Best wishes,
Sam
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Re: [Discuss-gnuradio] complex vector output of a block
Thanks again Martin. I believe the problem is not in the algorithm as I actually tested it and can print the output of it on the screen as you suggested (I mean out in my original post). Everything excellent at this stage. However, the problem is that the block in GRC doesn't generate output. I didn't want to give details in order not to divert direction of the problem investigation. However, the block finds the autocovariance matrix of N inputs using the update method. Best regards, Sam Martin Braun-4 wrote: On Wed, Jun 09, 2010 at 06:06:01AM -0700, Sammour wrote: Thanks for replying. N is designed to be 2:12. The block uses a number of inputs (N) to update a matrix that I am sending to the output as a vector that will be reshaped in the next block when it is used. Do you think that my programme takes much time to execute? Hi Sam, I have no clue what your block does, and you're not giving away too much information :) But I don't think your block should be too difficult to debug, I assume you have unit tests running (and failing), if not, do that first. Put in enough data for work() to be called once, and use printfs to see what's happening. MB -- Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin Braun Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-3790 Fax: +49 721 608-6071 www.cel.kit.edu KIT -- University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio -- View this message in context: http://old.nabble.com/complex-vector-output-of-a-block-tp28828557p28832150.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] complex vector output of a block
HI Eric, Thanks for replying. My block has N=2:12 complex input streams and one complex vector output stream of length N^2 (represents a reshaped NxN matrix). The block basically is meant to calculate the covariance matrix using a MATLAB library. The signatures are: input: gr_make_io_signature (2, 2, sizeof(gr_complex)); output: gr_make_io_signature (1, 1,N*N*sizeof(gr_complex)); However, the last thing I reached now is that I can get the output into a file sink but when displaying the content, I see the N^2 elements followed by a huge number of zeros then N^2 elements and then zeros. For example if N = 2 input streams, the output vector will appear like: a b c d 0 0 0 e f g h 0 0 0... and so on. A remark I noticed is that difference between a and e is always around 4096. What confuses me is how to get rid of the zeros and extract only the numbers of interest when connecting this block to the next block. Any hint? Best regards, Sam -- View this message in context: http://old.nabble.com/complex-vector-output-of-a-block-tp28828557p28836135.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] complex vector output of a block
Tom, I only need a single sample from each stream to generate the vector ( there is a method of doing this in signal processing) and I am inherting from gr_sync_block as the block is 1:1. I am also returning noutput_items and didn't use consume_each() of course. Thanks anyway. Still thinking :) Cheers, Sam -- View this message in context: http://old.nabble.com/complex-vector-output-of-a-block-tp28828557p28836849.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
RE: [Discuss-gnuradio] complex vector output of a block
Hi John, Thanks for the message sorry for using MATLAB notation without
clarification 2:12 = from 2 upto 12.
To simplify the case, I wrote the following code that actually carry the same
problem concept:
*
#ifdef HAVE_CONFIG_H
#include config.h
#endif
#include arraycomms_construct_rxx_vcc.h
#include gr_io_signature.h
arraycomms_construct_rxx_vcc_sptr arraycomms_make_construct_rxx_vcc (int
input_ports){
return arraycomms_construct_rxx_vcc_sptr (new arraycomms_construct_rxx_vcc
(input_ports));
}
unsigned int N=0;// number of input ports
arraycomms_construct_rxx_vcc::arraycomms_construct_rxx_vcc (int num_input_ports)
: gr_sync_block (construct_rxx_vcc, gr_make_io_signature (2, 12,
sizeof(gr_complex)),
gr_make_io_signature (1,1 ,
num_input_ports*num_input_ports*sizeof(gr_complex))){
N=num_input_ports;
}
arraycomms_construct_rxx_vcc::~arraycomms_construct_rxx_vcc (){}
int arraycomms_construct_rxx_vcc::work (int noutput_items,
gr_vector_const_void_star input_items,
gr_vector_void_star output_items)
{
gr_complex *out =(gr_complex *) output_items[0];
gr_complex out_vector [N*N];
const gr_complex *in[N];
for (unsigned int i = 0; iN; i++)
{
in[i] = (const gr_complex *) input_items[i];
}
for (int i = 0; i noutput_items; i++){
unsigned int index = 0;
for (unsigned int n =1; n=N*N; n++){
out_vector[index]=gr_complex(4, 0);
index++;
}
}
memcpy(out, out_vector, N*N*sizeof(gr_complex));
return noutput_items;
}
*
This code is supposed to generate a vector of 4 elements ( I used N=2 in the
GRC) with each element = 4+j0 whatever the input is. However, the content of
the sink file is:
4.000e+00
4.000e+00
4.000e+00
4.000e+00
0.000e+00
0.000e+00
0.000e+00
0.000e+00
0.000e+00
0.000e+00
.
4.000e+00
4.000e+00
4.000e+00
4.000e+00
0.000e+00
0.000e+00
0.000e+00
0.000e+00
0.000e+00
0.000e+00
I hope the situation is now clearer.
Cheers,
Sam
To: samy-1...@live.com; g...@toad.com
Subject: Re: [Discuss-gnuradio] complex vector output of a block
Date: Wed, 9 Jun 2010 16:49:15 -0700
From: g...@toad.com
Thanks for replying. N is designed to be 2:12.
Maybe others understand what you're saying, but 2:12 doesn't mean anything
to me. Do you mean between 2 and 12? Or is this a Biblical reference,
or perhaps the time of day?
I suggest that you just post the code that's giving you the trouble
(either in an email, or if it's more than about 200 lines, put it on
a web site or pastebin or wiki and email a URL for it). Trying to
debug somebody else's code piecemeal by asking little questions is
unlikely to lead to success.
John
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[Discuss-gnuradio] print the output of a block python
Dear engineers for debugging purpose, can we print the output of a block in python file generated by swig? Thanks -- View this message in context: http://old.nabble.com/print-the-output-of-a-block-python-tp28789113p28789113.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] GRC symbolic-link is not working
Hi all, I have installed gnuradio with grc. the bootstrap, configure, make, make check and sudo make install all of them ran nicely. However when I type grc in the terminal it says: The program 'grc' is currently not installed. You can install it by typing: sudo apt-get install grc grc: command not found I tried to figure out what the problem is , and now can run grc by double-clicking this file /usr/local/share/gnuradio/grc/freedesktop/GRC. Can anybody help me in fixing the problem, please? or maybe there's something went wrong in the installation caused this to happen. Thank you, Sam _ http://clk.atdmt.com/UKM/go/195013117/direct/01/ We want to hear all your funny, exciting and crazy Hotmail stories. Tell us now___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] GRC symbolic-link is not working
Hi all, I have installed gnuradio with grc. the bootstrap, configure, make, make check and sudo make install all of them ran nicely. However when I type grc in the terminal it says: The program 'grc' is currently not installed. You can install it by typing: sudo apt-get install grc grc: command not found I tried to figure out what the problem is , and now can run grc by double-clicking this file /usr/local/share/gnuradio/grc/freedesktop/GRC. Can anybody help me in fixing the problem, please? or maybe there's something went wrong in the installation caused this to happen. Thank you, Sam -- View this message in context: http://old.nabble.com/GRC-symbolic-link-is-not-working%E2%80%8F-tp28781956p28781956.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] GRC s ymbolic-link is not working
Thanks a lot... it works Sammour wrote: Hi all, I have installed gnuradio with grc. the bootstrap, configure, make, make check and sudo make install all of them ran nicely. However when I type grc in the terminal it says: The program 'grc' is currently not installed. You can install it by typing: sudo apt-get install grc grc: command not found I tried to figure out what the problem is , and now can run grc by double-clicking this file /usr/local/share/gnuradio/grc/freedesktop/GRC. Can anybody help me in fixing the problem, please? or maybe there's something went wrong in the installation caused this to happen. Thank you, Sam -- View this message in context: http://old.nabble.com/GRC-symbolic-link-is-not-working%E2%80%8F-tp28781956p28783306.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Output not showing in GRC
I'm afraid yes. These are the last two line in the general_work () consume_each(noutput_items); return noutput_items; I am actually suspicious about the makefile.am and library integration stuff, can anybody check this for me please? libgnuradio_mypackage_la_LDFLAGS = \ $(NO_UNDEFINED)\ -L$(MATLAB_ROOT)/runtime/glnx86 libgnuradio_arraycomms_la_LIBADD = \ $(GNURADIO_CORE_LA)\ -L/usr/lib -lmyfirstblock where myfirstblock is a library generated in MATLAB Cheers, Sam Johnathan Corgan-2 wrote: On Mon, May 31, 2010 at 14:57, Sammour samy-1...@live.com wrote: However, when I install my block in GRC, I connect the output to a file sink that stores nothing! I also tried to plot the magnitude of the complex output and nothing shows. Are you returning the number of samples produced by your work function? Johnathan ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio -- View this message in context: http://old.nabble.com/Output-not-showing-in-GRC-tp28735468p28739716.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Output not showing in GRC
Hello guys, As my first gnuradio block, I have built a block to multiply two complex numbers using MATLAB library. I compiled my block and wrote a python programme to test it and everything went very nicely. I used this c++ statement in the general_work method to see the output of the block: std::cout out[i] std::endl; and indeed I can see the complex product for my inputs. However, when I install my block in GRC, I connect the output to a file sink that stores nothing! I also tried to plot the magnitude of the complex output and nothing shows. The surprising part is that the output values of the above c++ statement are printed in the output area in GRC and this means that my c++ code is actually invoked. I wonder if this has to do with library linking or not. Any suggestions?? Thanks a lot! Sam -- View this message in context: http://old.nabble.com/Output-not-showing-in-GRC-tp28735468p28735468.html Sent from the GnuRadio mailing list archive at Nabble.com. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
RE: [Discuss-gnuradio] Output not showing in GRC
hi josh, Unfortunately, the solution didnt work. I also want to reiterate that I used the graphical scope that failed as well. Thanks Sam Date: Mon, 31 May 2010 15:02:05 -0700 From: j...@joshknows.com To: discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] Output not showing in GRC the file sink is probably not flushing to disk (common issue). Try using a head block and the run to completion option and see what happens. Upon completion, the file sink destructor will flush. -Josh On 05/31/2010 02:57 PM, Sammour wrote: Hello guys, As my first gnuradio block, I have built a block to multiply two complex numbers using MATLAB library. I compiled my block and wrote a python programme to test it and everything went very nicely. I used this c++ statement in the general_work method to see the output of the block: std::cout out[i] std::endl; and indeed I can see the complex product for my inputs. However, when I install my block in GRC, I connect the output to a file sink that stores nothing! I also tried to plot the magnitude of the complex output and nothing shows. The surprising part is that the output values of the above c++ statement are printed in the output area in GRC and this means that my c++ code is actually invoked. I wonder if this has to do with library linking or not. Any suggestions?? Thanks a lot! Sam ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio _ http://clk.atdmt.com/UKM/go/195013117/direct/01/ ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
