Re:[Discuss-gnuradio] Problem with GUI interface of GNU Radio
Hi , If you need a GUI to work with the gnuradio and play with the blocks, you can use the gnuradio companion( GRC). It is pretty cool. U can download it from GRC website. But if you want to write your own blocks, the best place to start is http://www.gnu.org/software/gnuradio/doc/howto-write-a-block.html . Here you will find the necessary tutorial on how to start with the gnuradio. Good Luck Fasika - Looking for last minute shopping deals? Find them fast with Yahoo! Search.___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] ninput_items from demodulator
Hi all,
I have a module to demodulate packets received from a
file source, and it works fine. I want to have a fixed
number of inputs (1024) coming from the demodulator.
What i did is i override the forcast method of
gr_block.
void
usbm::forecast (int noutput_items,
gr_vector_int
ninput_items_required)
{
unsigned ninputs = ninput_items_required.size ();
for (unsigned i = 0; i ninputs; i++)
ninput_items_required[i] =1024 ;
}
But the problem is that evenif i dont get less than
1024 items, the input varies with the differenc calls
to the method.
Here is a sample of the input items from a demod
block.
number of items: 1027
--
number of items: 2047
--
number of items: 1025
--
number of items: 1024
--
number of items: 2047
--
number of items: 1024
--
number of items: 1026
--
number of items: 2047
--
number of items: 1025
--
number of items: 2053
--
Does this mean that the size of the output from the
demodulator block varies ?
Fasika
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Re: [Discuss-gnuradio] GMSK Demodulator -- Assertion 'imu=0 failed.
Thanks , Now its working fine. Fasika Eric Blossom [EMAIL PROTECTED] wrote: On Tue, Feb 05, 2008 at 12:21:37AM -0800, Fasika Alemayehu wrote: I am using GNU radio 3.1.1 but I have been using the block blks2. Now I am using blks2impl and the error is gone. But I am now facing a new problem. -- /usr/local/lib/python2.5/site-packages/gnuradio/gr/basic_flow_graph.py, line 84, in coerce_endpoint raise ValueError, Not coercible to endpoint: %s % (x,) ValueError: Not coercible to endpoint: -- You can't mix flow_graph and blk2. You should be subclassing gr.top_block, not gr.flow_graph Here is the code: from gnuradio import gr from gnuradio.blks2impl import gmsk from optparse import OptionParser from gnuradio.eng_option import eng_option import struct class graph(gr.flow_graph): def __init__(self): gr.flow_graph.__init__(self) filename = '/home/fasika/Desktop/Binary' outputfilename = demod self.src = gr.file_source(gr.sizeof_gr_complex, filename) demod = gmsk.gmsk_demod() self.dst = gr.file_sink(gr.sizeof_char, outputfilename) self.connect(self.src, demod, self.dst) if __name__ == '__main__': try: graph().run() except KeyboardInterrupt: pass Eric - Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] GMSK Demodulator -- Assertion 'imu=0 failed.
I am using GNU radio 3.1.1 but I have been using the block blks2. Now I am using blks2impl and the error is gone. But I am now facing a new problem. -- /usr/local/lib/python2.5/site-packages/gnuradio/gr/basic_flow_graph.py, line 84, in coerce_endpoint raise ValueError, Not coercible to endpoint: %s % (x,) ValueError: Not coercible to endpoint: gnuradio.blks2impl.gmsk.gmsk_demod object at 0xb649deac -- Here is the code: from gnuradio import gr from gnuradio.blks2impl import gmsk from optparse import OptionParser from gnuradio.eng_option import eng_option import struct class graph(gr.flow_graph): def __init__(self): gr.flow_graph.__init__(self) filename = '/home/fasika/Desktop/Binary' outputfilename = demod self.src = gr.file_source(gr.sizeof_gr_complex, filename) demod = gmsk.gmsk_demod() self.dst = gr.file_sink(gr.sizeof_char, outputfilename) self.connect(self.src, demod, self.dst) if __name__ == '__main__': try: graph().run() except KeyboardInterrupt: pass Fasika Eric Blossom [EMAIL PROTECTED] wrote: On Mon, Feb 04, 2008 at 02:27:09AM -0800, Fasika Alemayehu wrote: Hi , I was running a GMSK demodulator to demodulate a file source signal, and I have come up with the following error. I think there is a data type problem associated. Does anybody have similar problem ? I check the previous posts but there is no answer on that. Which GMSK demodulator? gnuadio-core/src/python/gnuradio/blks2impl/gmsk.py? Which version of GNU Radio? Here is the code : [EMAIL PROTECTED]:~$python demod_file.py gr_fir_fff: using SSE python: gri_mmse_fir_interpolator.cc:66: float gri_mmse_fir_interpolator::interpolate(const float*, float) const: Assertion `imu = 0' failed. Aborted (core dumped) Fasika Eric - Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] GMSK Demodulator -- Assertion 'imu=0 failed.
Hi , I was running a GMSK demodulator to demodulate a file source signal, and I have come up with the following error. I think there is a data type problem associated. Does anybody have similar problem ? I check the previous posts but there is no answer on that. Here is the code : [EMAIL PROTECTED]:~$python demod_file.py gr_fir_fff: using SSE python: gri_mmse_fir_interpolator.cc:66: float gri_mmse_fir_interpolator::interpolate(const float*, float) const: Assertion `imu = 0' failed. Aborted (core dumped) Fasika - Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Lost a byte of data
Hi all, I have been using gnuradio to receive the data from the front end hardware. I have made a file sink to see the data. And the data pattern seems to lose a byte , and this occurs every 1024 bytes. I think the software reads 16KB of data but the error comes ever 1KB. I am using a SSRP module to interface with the hardware, in Ubuntu Gutsy. I have attached the portion of the file where the change occurs. The unexpected byte error comes at 5113444. 5113360 f887 fd25 f80b fd26 f8ad fdaf f819 fcd0 5113400 f83b fd29 f858 fd3f f80b fd7b f8d2 fe23 5113420 f92a fd6d f7a8 fd83 f89f fd2e f800 fd2c 5113440 f8a3 fd7f d700 41f7 0bfd aff8 85fd adf8 5113460 9afd 96f8 35fc aaf8 7cfcbff8 effd f5f7 5113500 5afc 93f8 6cfd 5ff8 c9fd 1ef8 4ffd 21f8 Any suggestion is of great help. Fasika - Looking for last minute shopping deals? Find them fast with Yahoo! Search.___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re:[Discuss-gnuradio]Can not creating a flow graph
Hi Jacky , As far as I understand your question, you are expecting a GUI from the example, dial_tone.py. But gr.flow_graph is a used for connecting the different signal processing blocks, and ensures a proper data flow from the source to sink in the dial_tone.py case. Thus, the target of the program is linking the signal source with the audio sink. So, since you hear a sound ( a dial tone), the program executed successfully. If you are looking for a GUI, you can install GNU radio companion(GRC). Then, you can play with the different signal processing blocks. I think I have answered your question. Fasika - Looking for last minute shopping deals? Find them fast with Yahoo! Search.___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Frontend Hardware which is not USRP
Thanks for the reply ,
The connection of the hardware( lets say hw) with the radio is as usrp does.
Received samples are sent from the FPGA via the FX2 over endpoint 6 using USB
bulk transfers. Endpoint 2 is not yet used since we are testing the receiver
only. The A/D or VCO are configured by the FPGA(Spartan-3E-500) for the 2402
MHz channel @ 48 MHz sampling. The decimation is 12x so the data from EP6 is 4
Ms/sec, each sample is 16 bit I and 16 bit Q as with the USRP. ad9863, fx2lp
are used in the hw.
My question is whether i can use the gnuradio with some simple modifications
like the vendor id,device id and prodcut id for the hw, seen by the gnuradio as
usrp.
Best ,
Fasika
Eric Blossom [EMAIL PROTECTED] wrote: On Thu, Dec 13, 2007 at 12:48:24AM
-0800, Fasika Alemayehu wrote:
Thanks for the reply ,
The receiver front end is similar with the usrp. The data transfer
to and from the hardware using the usb endpoints is similar with
that of the usrp that you mentioned. But the problem is when i tried
to contact the hardware , the response is that there is failed to
find usrp[0]. The product id and the vendor id of the usrp and our
hardware are different. How can I solve this problem ? I read on the
forum that I should add the device and vendor id to the list in
usrp_ids.h and get the usrp developers to acknowledge it.
Best ,
Fasika
Unless you device is identical to the USRP and uses exactly the same
FX2 code and FPGA RBF's, you'll probably have to do some work.
Have you looked at the source code for the host side of the interface
to the USRP? usrp/host/lib/legacy/*.{h,cc}
Do you have a specific question? How do I get my new hardware that's
sort of like a usrp to work with gnuradio is a bit open ended.
Eric
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[Discuss-gnuradio] Receiver frontend which is not USRP
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Re: [Discuss-gnuradio] Frontend Hardware which is not USRP
Thanks for the reply , The receiver front end is similar with the usrp. The data transfer to and from the hardware using the usb endpoints is similar with that of the usrp that you mentioned. But the problem is when i tried to contact the hardware , the response is that there is failed to find usrp[0]. The product id and the vendor id of the usrp and our hardware are different. How can I solve this problem ? I read on the forum that I should add the device and vendor id to the list in usrp_ids.h and get the usrp developers to acknowledge it. Best , Fasika Eric Blossom [EMAIL PROTECTED] wrote: On Mon, Dec 10, 2007 at 01:28:38PM -0800, Fasika Alemayehu wrote: Hi Eric, I also have got a similar situation. We are building a software defined radio using GNU radio. We have a receiver front end to test and analyze the performance of Wireless sensor nodes at 2.5GHz. The module is similar with USRP but we are studying the differences inorder to integrate the hardware with the gnuradio. I would really appreciate if I can find any documentation about the details of the signal transfer to/from the usrp and the usrp itself so that we can see the difference between the USRP and our hardware. Best , Fasika There is no documentation outside of that in the code on this. However, it's pretty straight-forward. We talk to the USRP using 3 USB end points. EP0, the control endpoint, is used to load FX2 firmware and the FPGA .rbf file, low-level control of the daughterboards, setting control registers in the FPGA, and other misc operations. The list of operations and the arguments is in usrp/firmware/include/usrp_commands.h Received samples are sent from the FPGA via the FX2 over endpoint 6 using USB bulk transfers. Each USB packet is 512 bytes long, and the data in each packet is interleaved 16-bit little-endian I Q pairs. I.e., I0, Q0, I1, Q1,... Transmit samples are sent in the same format over endpoint 2 using USB bulk tranfers. The schematics of the USRP are available as PDFs and gscheme source here: http://gnuradio.org/trac/browser/usrp-hw/trunk/USRP_REV_4_2 Eric - Never miss a thing. Make Yahoo your homepage.___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Frontend Hardware which is not USRP
Hi Eric, I also have got a similar situation. We are building a software defined radio using GNU radio. We have a receiver front end to test and analyze the performance of Wireless sensor nodes at 2.5GHz. The module is similar with USRP but we are studying the differences inorder to integrate the hardware with the gnuradio. I would really appreciate if I can find any documentation about the details of the signal transfer to/from the usrp and the usrp itself so that we can see the difference between the USRP and our hardware. Best , Fasika - Looking for last minute shopping deals? Find them fast with Yahoo! Search.___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] ImportError: No module named gnuradio
Hi All , I have just installed gnuradio and it was successful. But when i tried to run the gnuradio-examples, i get the error message 'ImportError: No module named gnuradio'. I have changed the PYTHONPATH to the directory where python is installed but it is not working. I have installed gnuradio in a different folder i.e. /usr/Nett/users/fass/gnuradio whereas the python directory is /usr/lib/python2.5/site-packages. Could that be a problem ? Here is the error [EMAIL PROTECTED]:~$ export PYTHONPATH=/usr/lib/python2.5/site-packages [EMAIL PROTECTED]:~/gnuradio/gnuradio-examples/python/network$ ./dial_tone_source.py Traceback (most recent call last): File ./dial_tone_source.py, line 23, in module from gnuradio import gr ImportError: No module named gnuradio Regards, Fasika - Never miss a thing. Make Yahoo your homepage.___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] ImportError: No module named gnuradio
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