4 Mar
2019
4 Mar
'19
4:49 p.m.
This is my first post and I have been experimenting with an rtl-sdr for
only a few weeks. So I am sure I am not doing a lot of things
correctly. But:
I have created a GRC flow graph that does what I want. It has a
rtl-sdr>FIR filter> I/Q samples> file.
I need to create a stand alone program that when run, implements the
same functions but rather then sending the samples to a file, passes
them to my program for further processing.
I intend to run it on a Raspberry Pi so the less overhead the better.
Thanks In Advance.
Pete
4 Mar
4 Mar
5:38 p.m.
Hello,
You can use a zmq block or socket to pass your data to your app or if you
want you can write your own block that pass your data to your app via a
callback method.
Sam
On Mon, 4 Mar 2019, 22:49 P C, <pczzs(a)yahoo.com> wrote:
This is my first post and I have been experimenting
with an rtl-sdr for
only a few weeks. So I am sure I am not doing a lot of things correctly.
But:
I have created a GRC flow graph that does what I want. It has a
rtl-sdr>FIR filter> I/Q samples> file.
I need to create a stand alone program that when run, implements the same
functions but rather then sending the samples to a file, passes them to my
program for further processing.
I intend to run it on a Raspberry Pi so the less overhead the better.
Thanks In Advance.
Pete
11:05 p.m.
Sam,
I never heard about "zmq block or socket to pass" I will look into those
methods.
Something tells me I should go the route to write my own block but I
don't know where to start.
Would you have a link?
Note, I don't want a block of samples to go to my app, what I want is
each time the FIR filter spits out a sample I want to process it with my
app.
TNX
Pete
On 3/4/2019 4:38 PM, samuel verdon wrote:
Hello,
You can use a zmq block or socket to pass your data to your app or if
you want you can write your own block that pass your data to your app
via a callback method.
Sam
5 Mar
5 Mar
2:27 a.m.
Hi Pete,
as much as I like this mailing list, I think discussions on how to
write GNU Radio blocks are best off on the GNU Radio mailing list[1].
GNU Radio has tutorials on how to write your own blocks, both for
blocks written in Python (simplicity) and in C++ (speed/system
programming); you can find them on [2].
How you communicate with your "app" depends on what that is – is it a
separate process continously running, can it be a thread in another
process, or could one understand it as library?
Generally, GNU Radio was (is) meant to be used as library that you can
use from within your program; you'd just call the right GNU Radio
functions from within your program to set up the flow graph, and then
tell GNU Radio to spawn of the processes to run that flow graph, and
then can interact with the signal processing / get the data it
produces. (GQRX is an example of such a programm.)
Whether that is easier for you than running a GNU Radio flow graph as a
separate process interchanging data with your app is hard to tell.
Best regards,
Marus
[1] discuss-gnuradio(a)gnu.org, sign up on
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[2] https://tutorials.gnuradio.org
On Mon, 2019-03-04 at 22:05 -0600, P C wrote:
Sam,
I never heard about "zmq block or socket to pass" I will look into
those methods.
Something tells me I should go the route to write my own block but I
don't know where to start.
Would you have a link?
Note, I don't want a block of samples to go to my app, what I want is
each time the FIR filter spits out a sample I want to process it with
my app.
TNX
Pete
On 3/4/2019 4:38 PM, samuel verdon wrote:
Hello,
You can use a zmq block or socket to pass your data to your app or
if you want you can write your own block that pass your data to
your app via a callback method.
Sam
1:13 p.m.
I did a "reply all" which may be sending this to accounts where it
shouldn't go.
Please accept my apologies if that is so.
On 3/5/2019 1:27 AM, Müller, Marcus (CEL) wrote:
GNU Radio has tutorials on how to write your own
blocks, both for
I have found some of those. But for some (stupid??) reason I
linked
in long after the introductory material in your links. I will "start at
the start" and see how that works.
How you communicate with your "app" depends on what that is – is it a
separate process continously running, can it be a thread in another
process, or could one understand it as library?
Mine will be a continuously running process.
Generally, GNU Radio was (is) meant to be used as library that you can
use from within your program;
I sort of had that feeling but I had not stumbled on
the right links to
tell me how to do that.
It looks like you have provided those links.
One reason I came to this list is because I was having problems running
GRC on my RPi. I was concerned the RPi didn't have enough power for
what I wanted so I was looking for a more direct way then going through
GNURadio.
With what you, Sam, and Dale provided I should be in good
shape.....after I digest it.
Thanks a bunch,
Pete
>
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Müller, Marcus (CEL) -
P C -
samuel verdon