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pi@raspberrypi:~/hackrf/host/build $ sudo apt search hackrf
Sorting... Done
Full Text Search... Done
gqrx-sdr/stable 2.3.1-2 armhf
  Software defined radio receiver

gr-osmosdr/stable 0.1.3-2 armhf
  Gnuradio blocks from the OsmoSDR project

hackrf/stable,now 2014.08.1-1 armhf [installed]
  Software defined radio peripheral

libhackrf-dev/stable 2014.08.1-1 armhf
  Software defined radio peripheral

libhackrf0/stable,now 2014.08.1-1 armhf [installed,automatic]
  Software defined radio peripheral

pi@raspberrypi:~/SoapyHackRF $ make
Scanning dependencies of target HackRFSupport
[ 25%] Building CXX object CMakeFiles/HackRFSupport.dir/HackRF_Registation.cpp.o
In file included from /home/pi/SoapyHackRF/HackRF_Registation.cpp:22:0:
/home/pi/SoapyHackRF/SoapyHackRF.hpp:356:2: error: ‘hackrf_device_list_t’ does not name a type
  hackrf_device_list_t * _list;
  ^
/home/pi/SoapyHackRF/SoapyHackRF.hpp:371:2: error: ‘transceiver_mode_t’ does not name a type
  transceiver_mode_t _current_mode;
  ^
/home/pi/SoapyHackRF/HackRF_Registation.cpp: In function ‘std::vector<std::map<std::basic_string<char>, std::basic_string<char> > > find_HackRF(const Kwargs&)’:
/home/pi/SoapyHackRF/HackRF_Registation.cpp:33:2: error: ‘hackrf_device_list_t’ was not declared in this scope
  hackrf_device_list_t *list;
  ^
/home/pi/SoapyHackRF/HackRF_Registation.cpp:33:24: error: ‘list’ was not declared in this scope
  hackrf_device_list_t *list;
                        ^
/home/pi/SoapyHackRF/HackRF_Registation.cpp:35:27: error: ‘hackrf_device_list’ was not declared in this scope
  list =hackrf_device_list();
                           ^
/home/pi/SoapyHackRF/HackRF_Registation.cpp:45:44: error: ‘hackrf_device_list_open’ was not declared in this scope
    hackrf_device_list_open(list, i, &device);
                                            ^
/home/pi/SoapyHackRF/HackRF_Registation.cpp:84:30: error: ‘hackrf_device_list_free’ was not declared in this scope
  hackrf_device_list_free(list);
                              ^
CMakeFiles/HackRFSupport.dir/build.make:54: recipe for target 'CMakeFiles/HackRFSupport.dir/HackRF_Registation.cpp.o' failed
make[2]: *** [CMakeFiles/HackRFSupport.dir/HackRF_Registation.cpp.o] Error 1
CMakeFiles/Makefile2:60: recipe for target 'CMakeFiles/HackRFSupport.dir/all' failed
make[1]: *** [CMakeFiles/HackRFSupport.dir/all] Error 2
Makefile:117: recipe for target 'all' failed
make: *** [all] Error 2

Generating: "/home/pi/top_block.py"

Executing: "/home/pi/top_block.py"

linux; GNU C++ version 4.9.1; Boost_105500; UHD_003.007.003-0-unknown

Xlib:  extension "RANDR" missing on display ":2.0".
Using Volk machine: neon_hardfp_orc
gr-osmosdr 0.1.3 (0.1.3) gnuradio 3.7.5
built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy 

FATAL: No supported devices found to pick from.

Trying to fill up 1 missing channel(s) with null source(s).
This is being done to prevent the application from crashing
due to gnuradio bug #528.

gr::log :INFO: audio source - Audio sink arch: alsa
gr::log :ERROR: audio_alsa_sink0 - [default]: set_channels failed: Invalid argument
Traceback (most recent call last):
  File "/home/pi/top_block.py", line 204, in <module>
    tb.Start(True)
  File "/usr/lib/python2.7/dist-packages/grc_gnuradio/wxgui/top_block_gui.py", line 73, in Start
    self.start()
  File "/usr/lib/python2.7/dist-packages/gnuradio/gr/top_block.py", line 104, in start
    top_block_start_unlocked(self._tb, max_noutput_items)
  File "/usr/lib/python2.7/dist-packages/gnuradio/gr/runtime_swig.py", line 4726, in top_block_start_unlocked
    return _runtime_swig.top_block_start_unlocked(*args, **kwargs)
RuntimeError: check topology failed on audio_alsa_sink(20) using ninputs=1, noutputs=0

rf $ ssh pi rx_fm -d driver=rtlsdr,serial=2 -f 97.7M -M wbfm -E wav - | play -
Found 2 device(s):
  0: available=Yes, driver=rtlsdr, label=Generic RTL2832U OEM :: 2, manufacturer=Realtek, product=RTL2838UHIDIR, rtl=0, serial=2, tuner=Rafael Micro R820T, 
  1: available=No, driver=rtlsdr, label=Generic RTL2832U OEM :: 00000001, manufacturer=Realtek, product=RTL2838UHIDIR, rtl=1, serial=00000001, tuner=, 

^C

rf $ ssh pi rx_fm -d driver=rtlsdr,serial=2 -f 97.7M -M wbfm -E wav - | play -
  0: available=No, driver=rtlsdr, label=Generic RTL2832U OEM :: 2, manufacturer=Realtek, product=RTL2838UHIDIR, rtl=0, serial=2, tuner=, 
  1: available=No, driver=rtlsdr, label=Generic RTL2832U OEM :: 00000001, manufacturer=Realtek, product=RTL2838UHIDIR, rtl=1, serial=00000001, tuner=, 

pi@raspberrypi:~ $ ps ax|grep rx_fm
 9773 ?        Ssl    0:10 rx_fm -d driver=rtlsdr,serial=2 -f 97.7M -M wbfm -E wav -
 9802 ?        Ssl    0:00 rx_fm -d driver=rtlsdr,serial=2 -f 97.7M -M wbfm -E wav -
 9824 pts/5    S+     0:00 grep --color=auto rx_fm

:~ $ python top_block.py 
linux; GNU C++ version 4.9.1; Boost_105500; UHD_003.007.003-0-unknown

Xlib:  extension "RANDR" missing on display ":2.0".
Using Volk machine: neon_hardfp_orc
Traceback (most recent call last):
  File "top_block.py", line 211, in <module>
    main()
  File "top_block.py", line 205, in main
    tb = top_block_cls()
  File "top_block.py", line 114, in __init__
    peak_hold=False,
  File "/usr/lib/python2.7/dist-packages/gnuradio/wxgui/fftsink_gl.py", line 126, in __init__
    persist_alpha=persist_alpha,
  File "/usr/lib/python2.7/dist-packages/gnuradio/wxgui/fft_window.py", line 277, in __init__
    self.plotter = plotter.channel_plotter(self)
  File "/usr/lib/python2.7/dist-packages/gnuradio/wxgui/plotter/channel_plotter.py", line 49, in __init__
    grid_plotter_base.__init__(self, parent, MIN_PADDING)
  File "/usr/lib/python2.7/dist-packages/gnuradio/wxgui/plotter/grid_plotter_base.py", line 50, in __init__
    plotter_base.__init__(self, parent)
  File "/usr/lib/python2.7/dist-packages/gnuradio/wxgui/plotter/plotter_base.py", line 94, in __init__
    wx.glcanvas.GLCanvas.__init__(self, parent, wx.ID_ANY, attribList=attribList);  # Specifically use the CTOR which does NOT create an implicit GL context
  File "/usr/lib/python2.7/dist-packages/wx-3.0-gtk2/wx/glcanvas.py", line 106, in __init__
    _glcanvas.GLCanvas_swiginit(self,_glcanvas.new_GLCanvas(*args, **kwargs))
wx._core.PyAssertionError: C++ assertion "ok" failed at ../src/unix/glx11.cpp(442) in GetGLXVersion(): GLX version not found