osmocom-sdr

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906 discussions

Consumption of rtl_tcp too slow?
by Mr Anthony Arnold 09 May '15

09 May '15

Hi list I'm having some trouble with gr-osmosdr and rtl_tcp. I'm trying to set up a Raspberry Pi as a remote receive to provide I/Q samples over the network to a machine running gnss-sdr (for realtime GPS processing.) The Pi simply runs "rtl_tcp -f 1575420000 -a 0.0.0.0", and then on gnss-sdr the gr-osmosdr block is created with osmosdr::source::make("rtl_tcp=<address of pi>"); This connects as expected, but the generated data from rtl_tcp is not being consumed fast enough; the linked list quickly fills up to 502. I thought maybe the WiFi was the bottleneck, so I switched to Ethernet. No luck, same behaviour. I decided to take it all the way back and plug the dongle straight into the machine that is running gnss-sdr, and then run rtl_tcp on the same machine: "rtl_tcp -f 1575420000" and change the arguments for the gnuradio block to ? osmosdr::source::make("rtl_tcp");? I still get this poor performance. Note that on the same machine, with the GrOsmoSdr block connecting straight to the dongle via USB (i.e. creating the block with empty arguments) the performance is fine and I'm able to track GPS satellites in realtime. I understand that having the network layer in between is going to cause some delay, but I didn't expect this much. I thought that maybe the actual processing of gnss-sdr was holding up the reads in some way, so I tried a different program which post-processes the data; the code which does this is in the listing below (pulled from the function "frontend_capture" from https://raw.githubusercontent.com/gnss-sdr/gnss-sdr/next/src/utils/front-en…). The source block is just a wrapper around an osmosdr::source("rtl_tcp"). The conditioner is a pass-through block. Unfortunately, the reads *still* aren't keeping up with the writes from rtl_tcp. I'd like to understand what's causing this. Is it because of the frequency tuning? Is it the sample rate? I have tried various rates. I noticed rtl_tcp_source_c::get_sample_rates? returns a few "known to work" rates. Should I be setting the sample rate to exactly one of these? gr::top_block_sptr top_block; GNSSBlockFactory block_factory; boost::shared_ptr<gr::msg_queue> queue; queue = gr::msg_queue::make(0); top_block = gr::make_top_block("Acquisition test"); std::shared_ptr<GNSSBlockInterface> source; source = block_factory.GetSignalSource(configuration, queue); std::shared_ptr<GNSSBlockInterface> conditioner = block_factory.GetSignalConditioner(configuration,queue); gr::block_sptr sink; sink = gr::blocks::file_sink::make(sizeof(gr_complex), "tmp_capture.dat"); //--- Find number of samples per spreading code --- long fs_in_ = configuration->property("GNSS-SDR.internal_fs_hz", 2048000); int samples_per_code = round(fs_in_ / (GPS_L1_CA_CODE_RATE_HZ / GPS_L1_CA_CODE_LENGTH_CHIPS)); int nsamples = samples_per_code * 50; int skip_samples = fs_in_ * 5; // skip 5 seconds gr::block_sptr head = gr::blocks::head::make(sizeof(gr_complex), nsamples); gr::block_sptr skiphead = gr::blocks::skiphead::make(sizeof(gr_complex), skip_samples); try { source->connect(top_block); conditioner->connect(top_block); top_block->connect(source->get_right_block(), 0, conditioner->get_left_block(), 0); top_block->connect(conditioner->get_right_block(), 0, skiphead, 0); top_block->connect(skiphead, 0, head, 0); top_block->connect(head, 0, sink, 0); top_block->run(); } catch(std::exception& e) { std::cout << "Failure connecting the GNU Radio blocks " << e.what() << std::endl; return false; } //delete conditioner; //delete source; return true; Anthony Arnold | Programmer b: http://anthony-arnold.com/ t: http://twitter.com/anthonyarnold_/ e: anthony.arnold(a)uqconnect.edu.au

3 4

Re : Info
by TSrinivasan 04 May '15

04 May '15

Hi There, I have HackRF with whip antenna 2.4 GHz and use gnu radio pre-install image. I use following command : * the measurement power in db. is it the same as in dbm ? I use following command : * osmocom_fft - F and set the frequency around 2.4155G. I can the color in blue fluctuate very high. What does it indicate ? attached recorded file and video screen recording at we transfer : <http://we.tl/3LaljnDpaW> http://we.tl/3LaljnDpaW Regards Srinivasan T

1 0

[PATCH 0/3] allow setting BW for R820T tunners
by P 26 Apr '15

26 Apr '15

This is rework of previous post of patches for setting BW on R820T tunners. It contains only minor cleantups (fix grammar) and add function for getting BW. The one question remains whatever to keep or not BW setting support for really narrow bandwidth values. They does have a bit blurry edges and for unexperienced users can cause a bit of troubles in other hand for someone who knows what to do can be still usefull. P

1 3

needed bandwidth for sdr_tcp?
by Michael Renner 22 Apr '15

22 Apr '15

Moin, what bandwiidth is needed for sdr_tcp? Does it depend on the signal bandwiidth like CW or stereo fm? I wonder if it will work on a Respberry Pi B+ with 700kBit/s uplink. Thanks for any hint -- |Michael Renner E-mail: michael.renner(a)gmx.de | |81541 Munich Twitter: dd0ul | |Germany Don't drink as root! ESC:wq

1 0

rtl-sdr: compiling problems under windows using cygwin?
by Simon Eigeldinger 18 Apr '15

18 Apr '15

Hi all, I just tried compiling rtl-sdr under cygwin and got the following output. maybe someone has a tip for me here: $ make Scanning dependencies of target convenience_static [ 5%] Building C object src/CMakeFiles/convenience_static.dir/convenience/conve nience.c.o Linking C static library libconvenience_static.a [ 5%] Built target convenience_static Scanning dependencies of target rtlsdr_shared [ 10%] Building C object src/CMakeFiles/rtlsdr_shared.dir/librtlsdr.c.o [ 15%] Building C object src/CMakeFiles/rtlsdr_shared.dir/tuner_e4k.c.o [ 20%] Building C object src/CMakeFiles/rtlsdr_shared.dir/tuner_fc0012.c.o [ 25%] Building C object src/CMakeFiles/rtlsdr_shared.dir/tuner_fc0013.c.o [ 30%] Building C object src/CMakeFiles/rtlsdr_shared.dir/tuner_fc2580.c.o [ 35%] Building C object src/CMakeFiles/rtlsdr_shared.dir/tuner_r82xx.c.o Linking C shared library cygrtlsdr-0.dll [ 35%] Built target rtlsdr_shared Scanning dependencies of target rtl_adsb [ 40%] Building C object src/CMakeFiles/rtl_adsb.dir/rtl_adsb.c.o Linking C executable rtl_adsb.exe libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x18b): undefined reference to `rtlsdr_set_tuner_gain_mode' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x1a7): undefined reference to `rtlsdr_get_tuner_gains' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x1c8): undefined reference to `rtlsdr_get_tuner_gains' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x275): undefined reference to `rtlsdr_set_center_freq' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x2f5): undefined reference to `rtlsdr_set_sample_rate' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x375): undefined reference to `rtlsdr_set_direct_sampling' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x474): undefined reference to `rtlsdr_set_offset_tuning' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x4f4): undefined reference to `rtlsdr_set_tuner_gain_mode' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x575): undefined reference to `rtlsdr_set_tuner_gain_mode' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x58b): undefined reference to `rtlsdr_set_tuner_gain' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x651): undefined reference to `rtlsdr_set_freq_correction' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x6bc): undefined reference to `rtlsdr_reset_buffer' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x70b): undefined reference to `rtlsdr_get_device_count' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x770): undefined reference to `rtlsdr_get_device_usb_strings' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x7ff): undefined reference to `rtlsdr_get_device_usb_strings' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x83b): undefined reference to `rtlsdr_get_device_usb_strings' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x89d): undefined reference to `rtlsdr_get_device_usb_strings' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x918): undefined reference to `rtlsdr_get_device_name' libconvenience_static.a(convenience.c.o):convenience.c:(.text+0x9ca): undefined reference to `rtlsdr_get_device_name' collect2: Fehler: ld gab 1 als Ende-Status zurück src/CMakeFiles/rtl_adsb.dir/build.make:88: die Regel für Ziel „src/rtl_adsb.exe“ scheiterte make[2]: *** [src/rtl_adsb.exe] Fehler 1 CMakeFiles/Makefile2:175: die Regel für Ziel „src/CMakeFiles/rtl_adsb.dir/all“ s cheiterte make[1]: *** [src/CMakeFiles/rtl_adsb.dir/all] Fehler 2 Makefile:117: die Regel für Ziel „all“ scheiterte make: *** [all] Fehler 2 --- Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft. http://www.avast.com

1 0

[PATCH 1/2] Allow setting bandwidth for R820T
by Jiří Pinkava 17 Apr '15

17 Apr '15

3 6

rtl-sdr sources
by Thierry Leconte 14 Apr '15

14 Apr '15

Hi, I had a problem with rtlsdr_cancel_async. I find this fork on github that solve my problem https://github.com/pabigot/rtl-sdr nice .. And then realize that there are 46 forks of the rtl-sdr on github.... I know that's how github works , but is there somewhere an effort to merge the best of these mods ? It doesn't seems to be the case on github, but perhaps elsewhere ?

4 3

compiling rtl-sdr on windows using cygwin
by Simon Eigeldinger 14 Apr '15

14 Apr '15

Hi all, anyone could tell me how to compile rtl-sdr on windows using cygwin? i have all libs but i seem not to get any dlls and programs back. used the normal cmake and the method using a configure script. greetings, simon --- Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft. http://www.avast.com

2 2

fosphor GPU report - lenovo ideapad yoga13
by Chris Kuethe 05 Apr '15

05 Apr '15

$ uname -a Linux lappy 4.0.0-rc6 #1 SMP Mon Mar 30 00:01:17 PDT 2015 x86_64 x86_64 x86_64 GNU/Linux [+] Selected device: Intel(R) HD Graphics IvyBridge M GT2 100 Frames time: 3806160 us BW estimated: 13.774723 Msps $ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 58 model name : Intel(R) Core(TM) i7-3537U CPU @ 2.00GHz stepping : 9 microcode : 0x17 cpu MHz : 800.000 cache size : 4096 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 2 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms xsaveopt bugs : bogomips : 4988.70 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: processor : 2 vendor_id : GenuineIntel cpu family : 6 model : 58 model name : Intel(R) Core(TM) i7-3537U CPU @ 2.00GHz stepping : 9 microcode : 0x17 cpu MHz : 804.785 cache size : 4096 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 2 apicid : 1 initial apicid : 1 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms xsaveopt bugs : bogomips : 4988.70 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: processor : 2 vendor_id : GenuineIntel cpu family : 6 model : 58 model name : Intel(R) Core(TM) i7-3537U CPU @ 2.00GHz stepping : 9 microcode : 0x17 cpu MHz : 805.957 cache size : 4096 KB physical id : 0 siblings : 4 core id : 1 cpu cores : 2 apicid : 2 initial apicid : 2 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms xsaveopt bugs : bogomips : 4988.70 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: processor : 3 vendor_id : GenuineIntel cpu family : 6 model : 58 model name : Intel(R) Core(TM) i7-3537U CPU @ 2.00GHz stepping : 9 microcode : 0x17 cpu MHz : 800.000 cache size : 4096 KB physical id : 0 siblings : 4 core id : 1 cpu cores : 2 apicid : 3 initial apicid : 3 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms xsaveopt bugs : bogomips : 4988.70 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: $ clinfo Number of platforms 1 Platform Name Intel Gen OCL Driver Platform Vendor Intel Platform Version OpenCL 1.2 beignet 1.0.1 Platform Profile FULL_PROFILE Platform Extensions cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_byte_addressable_store cl_khr_icd Platform Extensions function suffix Intel Platform Name Intel Gen OCL Driver Number of devices 1 Device Name Intel(R) HD Graphics IvyBridge M GT2 Device Vendor Intel Device Vendor ID 0x166 Device Version OpenCL 1.2 beignet 1.0.1 Driver Version 1.0.1 Device OpenCL C Version OpenCL C 1.2 beignet 1.0.1 Device Type GPU Device Profile FULL_PROFILE Max compute units 16 Max clock frequency 1000MHz Device Partition (core) Max number of sub-devices 1 Supported partition types None, None, None Max work item dimensions 3 Max work item sizes 512x512x512 Max work group size 512 Preferred work group size multiple 16 Preferred / native vector sizes char 16 / 8 short 8 / 8 int 4 / 4 long 2 / 2 half 0 / 8 (n/a) float 4 / 4 double 0 / 2 (n/a) Half-precision Floating-point support (n/a) Single-precision Floating-point support (core) Denormals No Infinity and NANs Yes Round to nearest Yes Round to zero No Round to infinity No IEEE754-2008 fused multiply-add No Support is emulated in software No Correctly-rounded divide and sqrt operations No Double-precision Floating-point support (n/a) Address bits 32, Little-Endian Global memory size 2147483648 (2GiB) Error Correction support No Max memory allocation 1073741824 (1024MiB) Unified memory for Host and Device Yes Minimum alignment for any data type 128 bytes Alignment of base address 1024 bits (128 bytes) Global Memory cache type Read/Write Global Memory cache size 8192 Global Memory cache line 128 bytes Image support Yes Max number of samplers per kernel 16 Max size for 1D images from buffer 65536 pixels Max 1D or 2D image array size 2048 images Max 2D image size 8192x8192 pixels Max 3D image size 8192x8192x2048 pixels Max number of read image args 128 Max number of write image args 8 Local memory type Global Local memory size 65536 (64KiB) Max constant buffer size 134217728 (128MiB) Max number of constant args 8 Max size of kernel argument 1024 Queue properties Out-of-order execution No Profiling Yes Profiling timer resolution 80ns Execution capabilities Run OpenCL kernels Yes Run native kernels Yes Prefer user sync for interop Yes printf() buffer size 1048576 (1024KiB) Built-in kernels __cl_copy_region_align4;__cl_copy_region_align16;__cl_cpy_region_unalign_same_offset;__cl_copy_region_unalign_dst_offset;__cl_copy_region_unalign_src_offset;__cl_copy_buffer_rect;__cl_copy_image_1d_to_1d;__cl_copy_image_2d_to_2d;__cl_copy_image_3d_to_2d;__cl_copy_image_2d_to_3d;__cl_copy_image_3d_to_3d;__cl_copy_image_2d_to_buffer;__cl_copy_image_3d_to_buffer;__cl_copy_buffer_to_image_2d;__cl_copy_buffer_to_image_3d;__cl_fill_region_unalign;__cl_fill_region_align2;__cl_fill_region_align4;__cl_fill_region_align8_2;__cl_fill_region_align8_4;__cl_fill_region_align8_8;__cl_fill_region_align8_16;__cl_fill_region_align128;__cl_fill_image_1d;__cl_fill_image_1d_array;__cl_fill_image_2d;__cl_fill_image_2d_array;__cl_fill_image_3d; Device Available Yes Compiler Available Yes Linker Available Yes Device Extensions cl_khr_global_int32_base_atomics cl_khr_global_int32_extended_atomics cl_khr_local_int32_base_atomics cl_khr_local_int32_extended_atomics cl_khr_byte_addressable_store cl_khr_icd NULL platform behavior clGetPlatformInfo(NULL, CL_PLATFORM_NAME, ...) Intel Gen OCL Driver clGetDeviceIDs(NULL, CL_DEVICE_TYPE_ALL, ...) Success [Intel] clCreateContext(NULL, ...) [default] Success [Intel] clCreateContext(NULL, ...) [other] <error: no devices in non-default plaforms> clCreateContextFromType(NULL, CL_DEVICE_TYPE_CPU) No devices found in platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_GPU) Success (1) Platform Name Intel Gen OCL Driver Device Name Intel(R) HD Graphics IvyBridge M GT2 clCreateContextFromType(NULL, CL_DEVICE_TYPE_ACCELERATOR) No devices found in platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_CUSTOM) No devices found in platform clCreateContextFromType(NULL, CL_DEVICE_TYPE_ALL) Success (1) Platform Name Intel Gen OCL Driver Device Name Intel(R) HD Graphics IvyBridge M GT2 ICD loader properties ICD loader Name OpenCL ICD Loader ICD loader Vendor OCL Icd free software ICD loader Version 2.2.3 ICD loader Profile OpenCL 1.2 -- GDB has a 'break' feature; why doesn't it have 'fix' too?

1 0

Patches: rtl_tcp memory fix, samplerate measure, args info
by Alexander Schultze 01 Apr '15

01 Apr '15

--- Alexander Schultze alexschultze(a)gmail.com +49 (0) 176 98109096

1 0

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