hi. i can not download LilacSat-1 IQ Record, (404 error). if it is possible for you please fix download link.

Hello to the list,
i am trying to run a grc file but i get this error:

Generating: '/home/enzo/gr-lilacsat-pyqt5/examples/BY70-2/demod_lilacsat1.py'

Executing: /usr/bin/python -u /home/enzo/gr-lilacsat-pyqt5/examples/BY70-2/demod_lilacsat1.py

Warning: failed to XInitThreads()
Traceback (most recent call last):
File "/home/enzo/gr-lilacsat-pyqt5/examples/BY70-2/demod_lilacsat1.py", line 492, in
main()
File "/home/enzo/gr-lilacsat-pyqt5/examples/BY70-2/demod_lilacsat1.py", line 480, in main
tb = top_block_cls()
File "/home/enzo/gr-lilacsat-pyqt5/examples/BY70-2/demod_lilacsat1.py", line 323, in init
self.lilacsat_vitfilt27_fb_0_0 = lilacsat.vitfilt27_fb()
AttributeError: 'module' object has no attribute 'vitfilt27_fb'

Done

Please any help?
Thanks
73's de Enzo IK8OZV

In file lib/ccsds/ccsds.c line 411:
/* Allow 1 error in sync word */ switch(cc->buffer_sync_det ^ cc->sync_word) { case 0x00000000: case 0x00000001: ....................... case 0x40000000: case 0x80000000: { cc->syncing = 1; cc->buffer_sync_det = 0; cc->mask_bit_out = 0x80; cc->n_out = 0; } }

Gcc support builtin function which can counts bit 1 in a variable.
https://gcc.gnu.org/onlinedocs/gcc-4.9.2/gcc/X86-Built-in-Functions.html

The following built-in functions are changed to generate new SSE4.2 instructions when -msse4.2 is used.
int __builtin_popcount (unsigned int)
Generates the popcntl machine instruction.
int __builtin_popcountl (unsigned long)
Generates the popcntl or popcntq machine instruction, depending on the size of unsigned long.
int __builtin_popcountll (unsigned long long)
Generates the popcntq machine instruction.
Need gcc -mpopcnt option to generate platform specfic instruction.
On arm Cortex-A8 or A9 gcc use NEON vcnt instruction
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0081b/CHDJJGAJ.html

On Cortex-M3 or M4 we don't have vcnt instruction, use hand-craft assembly instead.
http://www.sciencezero.org/index.php?title=ARM%3a_Count_ones_%28bit_count%29
`
;R0 - Value
;R0 = Number of ones
;Uses R0-R1
;Thumb-2 version
and r1,r0,#0xaaaaaaaa
sub r0,r0,r1,lsr #1

and r1,r0,#0xcccccccc
and r0,r0,#0x33333333
add r0,r0,r1,lsr #2

add r0,r0,r0,lsr #4
and r0,r0,#0x0f0f0f0f

add r0,r0,r0,lsr #8
add r0,r0,r0,lsr #16
and r0,r0,#63
bx lr
`

Another solution - pure c++
`static inline int nsetbits(uint16_t i)
{
i = i - ((i >> 1) & 0x5555);
i = (i & 0x3333) + ((i >> 2) & 0x3333);
return (int)(unchecked(((i + (i >> 4)) & 0x0F0F) * 0x0101) >> 8);
}

static inline int nsetbits(uint32_t i)
{
i = i - ((i >> 1) & 0x55555555);
i = (i & 0x33333333) + ((i >> 2) & 0x33333333);
return (int)(unchecked(((i + (i >> 4)) & 0x0F0F0F0F) * 0x01010101) >> 24);
}

static int nsetbits(uint64_t i)
{
i = i - ((i >> 1) & 0x5555555555555555);
i = (i & 0x3333333333333333) + ((i >> 2) & 0x3333333333333333);
return (int)(unchecked(((i + (i >> 4)) & 0xF0F0F0F0F0F0F0F) * 0x101010101010101) >> 56);
}`

[ 31%] Building CXX object lib/CMakeFiles/gnuradio-lilacsat.dir/plan13/Plan13.cpp.o
In file included from /home/hp/sdr/gr-lilacsat/lib/plan13/Plan13.cpp:12:0:
/home/hp/sdr/gr-lilacsat/lib/plan13/Plan13.h:52:28: error: ‘constexpr’ needed for in-class initialization of static data member ‘const double Plan13::YM’ of non-integral type [-fpermissive]
const static double YM = 365.25; /* Days in a year */
^~~~~~
/home/hp/sdr/gr-lilacsat/lib/plan13/Plan13.h:91:28: error: ‘constexpr’ needed for in-class initialization of static data member ‘const double Plan13::YT’ of non-integral type [-fpermissive]
const static double YT = 365.2421970;
^~~~~~~~~~~
lib/CMakeFiles/gnuradio-lilacsat.dir/build.make:686: recipe for target 'lib/CMakeFiles/gnuradio-lilacsat.dir/plan13/Plan13.cpp.o' failed
make[2]: *** [lib/CMakeFiles/gnuradio-lilacsat.dir/plan13/Plan13.cpp.o] Error 1
CMakeFiles/Makefile2:137: recipe for target 'lib/CMakeFiles/gnuradio-lilacsat.dir/all' failed
make[1]: *** [lib/CMakeFiles/gnuradio-lilacsat.dir/all] Error 2
Makefile:138: recipe for target 'all' failed
make: *** [all] Error 2

lilacsat.hit.edu.cn is currently unreachable, is there another way to get livecd? thx

in file sync_det_b_impl.cc line 86:
for (i = 0; i < noutput_items/8; i++)
if noutput_items is not multiple of 8, the loop will drop last mod(noutput_items, 8) bits
which cause sync_det fail to find header even if input is correct, or some bit is missing in middle of output packet.

my corrected version (gr-kcsa/lib/sync_det_b_impl.cc)
sync_det_b_impl.tar.gz

pi@raspberrypi:~/gr-satellites/build/gr-lilacsat/build $ make
...
[  39%] Building CXX object lib/CMakeFiles/gnuradio-lilacsat.dir/plan13/Plan13.cpp.o
In file included from /home/pi/gr-satellites/build/gr-lilacsat/lib/plan13/Plan13.cpp:12:0:
/home/pi/gr-satellites/build/gr-lilacsat/lib/plan13/Plan13.h:52:28: error: ‘constexpr’ needed for in-class initialization of static data member ‘const double Plan13::YM’ of non-integral type [-fpermissive]
 const static double   YM = 365.25;                           /* Days in a year                     */
                            ^~~~~~
/home/pi/gr-satellites/build/gr-lilacsat/lib/plan13/Plan13.h:91:28: error: ‘constexpr’ needed for in-class initialization of static data member ‘const double Plan13::YT’ of non-integral type [-fpermissive]
 const static double   YT = 365.2421970;
                            ^~~~~~~~~~~
lib/CMakeFiles/gnuradio-lilacsat.dir/build.make:686: recipe for target 'lib/CMakeFiles/gnuradio-lilacsat.dir/plan13/Plan13.cpp.o' failed
make[2]: *** [lib/CMakeFiles/gnuradio-lilacsat.dir/plan13/Plan13.cpp.o] Error 1
CMakeFiles/Makefile2:174: recipe for target 'lib/CMakeFiles/gnuradio-lilacsat.dir/all' failed
make[1]: *** [lib/CMakeFiles/gnuradio-lilacsat.dir/all] Error 2
Makefile:138: recipe for target 'all' failed
make: *** [all] Error 2

Did someone can help me to understand what I have to do ?

Detail:
[ 92%] Built target gnuradio-lilacsat
[ 93%] Linking CXX executable test-lilacsat
libgnuradio-lilacsat.so: undefined reference to updcrc_ccitt' libgnuradio-lilacsat.so: undefined reference tokfile_clearerr'
libgnuradio-lilacsat.so: undefined reference to `kfile_error'
collect2: error: ld returned 1 exit status
lib/CMakeFiles/test-lilacsat.dir/build.make:130: recipe for target 'lib/test-lilacsat' failed
make[2]: *** [lib/test-lilacsat] Error 1
CMakeFiles/Makefile2:174: recipe for target 'lib/CMakeFiles/test-lilacsat.dir/all' failed
make[1]: *** [lib/CMakeFiles/test-lilacsat.dir/all] Error 2
Makefile:138: recipe for target 'all' failed
make: *** [all] Error 2
root@kali:~/Desktop/SAT/gr-lilacsat-master/build#

Hello all,
I am trying to decode the BY70-2.
When i run the demod_by70-2.grc without loading the proxy first, i get the following:

Done

Generating: '/home/enzo/Scrivania/demod_lilacsat1.py'

Executing: /usr/bin/python3 -u /home/enzo/Scrivania/demod_lilacsat1.py

Elements Set To:
2020,000000, 328,000000, 98,000000, 39,000000, 0,001245, 153,000000, 206,000000, 14,000000, 0,000000, 2110,000000, 180,000000
gr::log :WARN: flat_flowgraph - Block (lilacsat1_frame_depack0) max output buffer set to 512 instead of requested 4
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.
gr::log :WARN: udp_source0 - Too much data; dropping packet.

and it never stops.
Vice versa if i run it after have ran the Proxy i get:

Generating: '/home/enzo/gr-lilacsat/examples/BY70-2/demod_lilacsat1.py'

Executing: /usr/bin/python3 -u /home/enzo/gr-lilacsat/examples/BY70-2/demod_lilacsat1.py

Elements Set To:
2020,000000, 187,000000, 98,000000, 260,000000, 0,000993, 242,000000, 117,000000, 14,000000, 0,000000, 41,000000, 180,000000
Traceback (most recent call last):
File "/home/enzo/gr-lilacsat/examples/BY70-2/demod_lilacsat1.py", line 542, in
main()
File "/home/enzo/gr-lilacsat/examples/BY70-2/demod_lilacsat1.py", line 518, in main
tb = top_block_cls()
File "/home/enzo/gr-lilacsat/examples/BY70-2/demod_lilacsat1.py", line 368, in init
self.blocks_socket_pdu_0_0 = blocks.socket_pdu('TCP_SERVER', '127.0.0.1', '8001', 10000, False)
File "/usr/local/lib/python3/dist-packages/gnuradio/blocks/blocks_swig5.py", line 801, in make
return _blocks_swig5.socket_pdu_make(type, addr, port, MTU, tcp_no_delay)
RuntimeError: bind: Indirizzo già in uso

Done (return code 1)

which means address already in use.

Please any help on how to solve???
Thanks

73's de Enzo IK8OZV

i have got these error:
[ 1%] Building CXX object lib/CMakeFiles/gnuradio-lilacsat.dir/afsk1200_tx_f_impl.cc.o
/home/hp/gr-satellites/build/gr-lilacsat/lib/afsk1200_tx_f_impl.cc: In member function ‘virtual int gr::lilacsat::afsk1200_tx_f_impl::work(int, gr_vector_const_void_star&, gr_vector_void_star&)’:
/home/hp/gr-satellites/build/gr-lilacsat/lib/afsk1200_tx_f_impl.cc:163:69: error: narrowing conversion of ‘254’ from ‘int’ to ‘char’ inside { } [-Wnarrowing]
char msg_ptt_on[] = {0xFE, 0xFE, 0x7C, 0xE0, 0x1C, 0x00, 0x01, 0xFD};
^
/home/hp/gr-satellites/build/gr-lilacsat/lib/afsk1200_tx_f_impl.cc:163:69: error: narrowing conversion of ‘254’ from ‘int’ to ‘char’ inside { } [-Wnarrowing]
/home/hp/gr-satellites/build/gr-lilacsat/lib/afsk1200_tx_f_impl.cc:163:69: error: narrowing conversion of ‘224’ from ‘int’ to ‘char’ inside { } [-Wnarrowing]
/home/hp/gr-satellites/build/gr-lilacsat/lib/afsk1200_tx_f_impl.cc:163:69: error: narrowing conversion of ‘253’ from ‘int’ to ‘char’ inside { } [-Wnarrowing]
/home/hp/gr-satellites/build/gr-lilacsat/lib/afsk1200_tx_f_impl.cc:164:70: error: narrowing conversion of ‘254’ from ‘int’ to ‘char’ inside { } [-Wnarrowing]
char msg_ptt_off[] = {0xFE, 0xFE, 0x7C, 0xE0, 0x1C, 0x00, 0x00, 0xFD};
^
/home/hp/gr-satellites/build/gr-lilacsat/lib/afsk1200_tx_f_impl.cc:164:70: error: narrowing conversion of ‘254’ from ‘int’ to ‘char’ inside { } [-Wnarrowing]
/home/hp/gr-satellites/build/gr-lilacsat/lib/afsk1200_tx_f_impl.cc:164:70: error: narrowing conversion of ‘224’ from ‘int’ to ‘char’ inside { } [-Wnarrowing]
/home/hp/gr-satellites/build/gr-lilacsat/lib/afsk1200_tx_f_impl.cc:164:70: error: narrowing conversion of ‘253’ from ‘int’ to ‘char’ inside { } [-Wnarrowing]
lib/CMakeFiles/gnuradio-lilacsat.dir/build.make:398: recipe for target 'lib/CMakeFiles/gnuradio-lilacsat.dir/afsk1200_tx_f_impl.cc.o' failed
make[2]: *** [lib/CMakeFiles/gnuradio-lilacsat.dir/afsk1200_tx_f_impl.cc.o] Error 1
CMakeFiles/Makefile2:137: recipe for target 'lib/CMakeFiles/gnuradio-lilacsat.dir/all' failed
make[1]: *** [lib/CMakeFiles/gnuradio-lilacsat.dir/all] Error 2
Makefile:138: recipe for target 'all' failed
make: *** [all] Error 2

Dear guys,

I want to learn how to generate a new block, I have alreay follow the gr-tutorial from the guide book from Gnuradio Website. I want to change the AFSK date rate into 9600bps, firstly I copied your codes into the OOT module. I have change the .cpp, .h, and the .xml files in the floder. It can be built and install well. But when I use it to run, Something happened like the followings. I have used the sudo make install and sudo ldconfig. Besides, I can run your softwares very well.

File "/home/wang/study-gnuradio/graduate/top_block.py", line 95, in init
self.shiwang_afsk_9600_0 = shiwang.afsk_9600(False, 1, 1)
AttributeError: 'module' object has no attribute 'afsk9600'

when I run into the ../build/swig directory, and run import module_swig if happens I have the undefined symbols names ax25_init.

wang@wang-VirtualBox:~/gnuradio-new-module$ cd gr-tutorial/
wang@wang-VirtualBox:~/gnuradio-new-module/gr-tutorial$ ls
apps  build  cmake  CMakeLists.txt  docs  examples  grc  include  lib  MANIFEST.md  python  swig
wang@wang-VirtualBox:~/gnuradio-new-module/gr-tutorial$ cd build/
wang@wang-VirtualBox:~/gnuradio-new-module/gr-tutorial/build$ cd swig/
wang@wang-VirtualBox:~/gnuradio-new-module/gr-tutorial/build/swig$ ls
CMakeFiles           tutorial_swig_doc_swig_docs    tutorial_swig.pyc             tutorial_swig_swig_2d0df.cpp     tutorial_swig.tag
cmake_install.cmake  _tutorial_swig_doc_tag         tutorial_swig.pyo             tutorial_swig_swig_2d0df.cpp.in
CTestTestfile.cmake  _tutorial_swig_doc_tag.cpp     tutorial_swigPYTHON_wrap.cxx  _tutorial_swig_swig_tag
Makefile             _tutorial_swig_doc_tag.cpp.in  _tutorial_swig.so             _tutorial_swig_swig_tag.cpp
tutorial_swig_doc.i  tutorial_swig.py               tutorial_swig_swig_2d0df      _tutorial_swig_swig_tag.cpp.in
wang@wang-VirtualBox:~/gnuradio-new-module/gr-tutorial/build/swig$ python2
Python 2.7.12 (default, Oct  8 2019, 14:14:10) 
[GCC 5.4.0 20160609] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import tutorial_swig
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "tutorial_swig.py", line 28, in <module>
    _tutorial_swig = swig_import_helper()
  File "tutorial_swig.py", line 24, in swig_import_helper
    _mod = imp.load_module('_tutorial_swig', fp, pathname, description)
ImportError: /home/wang/gnuradio-new-module/gr-tutorial/build/lib/libgnuradio-tutorial-1.0.0git.so.0.0.0: undefined symbol: ax25_init
>>> 

I am wondering if you have the solutions.
Thank you!

Shiwang Xing,
Micro-satellites technology lab,
Beihang University

Entered:

Chris-MacBookAir:gr-lilacsat-master chrisbridges$ mkdir build2
Chris-MacBookAir:gr-lilacsat-master chrisbridges$ cd !$
cd build2
Chris-MacBookAir:build2 chrisbridges$ cmake ../
-- The CXX compiler identification is AppleClang 6.0.0.6000056
-- The C compiler identification is AppleClang 6.0.0.6000056
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Build type not specified: defaulting to release.
-- Boost version: 1.52.0
-- Found the following Boost libraries:
--   filesystem
--   system
-- Found PkgConfig: /opt/local/bin/pkg-config (found version "0.28") 
-- checking for module 'cppunit'
--   found cppunit, version 1.13.2
-- Found CPPUNIT: /opt/local/lib/libcppunit.dylib  
-- Found Doxygen: /opt/local/bin/doxygen (found version "1.8.9.1") 
Checking for GNU Radio Module: RUNTIME
-- checking for module 'gnuradio-runtime'
--   found gnuradio-runtime, version 3.7.7.1
 * INCLUDES=/opt/local/include
 * LIBS=/opt/local/lib/libgnuradio-runtime.dylib;/opt/local/lib/libgnuradio-pmt.dylib
-- Found GNURADIO_RUNTIME: /opt/local/lib/libgnuradio-runtime.dylib;/opt/local/lib/libgnuradio-pmt.dylib  
GNURADIO_RUNTIME_FOUND = TRUE
CMake Warning (dev) at /opt/local/share/cmake/gnuradio/GrTest.cmake:45 (get_target_property):
  Policy CMP0026 is not set: Disallow use of the LOCATION target property.
  Run "cmake --help-policy CMP0026" for policy details.  Use the cmake_policy
  command to set the policy and suppress this warning.

  The LOCATION property should not be read from target "test-lilacsat".  Use
  the target name directly with add_custom_command, or use the generator
  expression $<TARGET_FILE>, as appropriate.

Call Stack (most recent call first):
  lib/CMakeLists.txt:107 (GR_ADD_TEST)
This warning is for project developers.  Use -Wno-dev to suppress it.

-- 
-- Checking for module SWIG
-- Found SWIG version 3.0.5.
-- Found SWIG: /opt/local/bin/swig  
-- Found PythonLibs: /usr/lib/libpython2.7.dylib (found suitable version "2.7.6", minimum required is "2") 
-- Found PythonInterp: /usr/local/bin/python2 (found suitable version "2.7.8", minimum required is "2") 
-- Performing Test HAVE_WNO_UNUSED_BUT_SET_VARIABLE
-- Performing Test HAVE_WNO_UNUSED_BUT_SET_VARIABLE - Failed
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/chrisbridges/Dropbox/SDR/gr-lilacsat-master/build2
Chris-MacBookAir:build2 chrisbridges$

Fails here:

After compiling and installing the current gr-lilacsat, I can not run the examples from GNU Radio companion. Running (for example) demod_by70_1.grc fails with:

Traceback (most recent call last):
File "/home/thasti/projekte/sat-trak/by70/gr-lilacsat/examples/demod_lilacsat1.py", line 462, in
main()
File "/home/thasti/projekte/sat-trak/by70/gr-lilacsat/examples/demod_lilacsat1.py", line 450, in main
tb = top_block_cls()
File "/home/thasti/projekte/sat-trak/by70/gr-lilacsat/examples/demod_lilacsat1.py", line 293, in init
self.lilacsat_vitfilt27_fb_0_0 = lilacsat.vitfilt27_fb()
AttributeError: 'module' object has no attribute 'vitfilt27_fb'

From Python console, I can import lilacsat, but instantiating a vitfilt27_fb fails as in the same way as it does in GNU Radio Companion.

Any ideas on how to fix this?

首先感谢HIT的大神们为开源所作的贡献
我在阅读代码时有一些地方没有读懂，所以想来请教一下：
在GMSK解调的函数中，pd_out = -tanh(d_buf_delay_real[0]) * d_buf_delay_imag[0] + tanh(d_buf_delay_imag[Tb]) * d_buf_delay_real[Tb]
这句是使用的什么算法呢？
跟costas环对应不上，跟差积频偏锁定的公式也对应不上，请问能给一个简单的解释或者提供一些参考资料吗？
先谢谢啦

Please anybody can tell me why i do not get any connected channel?

Where am i missing?
Thanks

If anyone installed the LATEST version of Python package "Construct" (currently 2.9), you may encounter an error with the various "DEMOD" flowgraphs as follows: "name 'String' is not defined"

It was determined that removing Construct 2.9 and installing Construct 2.8 corrected this error.

The install command used was: pip install construct==2.8.11

Best regards, -Scott, K4KDR

Hello all,
please anybody can help me on this issue?
When i run the BY70-2 Proxy, and receive the data i do not see any data
in the Proxy window. Please anybody can help me to understand where am i missing?
Any help will be really appreciated.
73's de Enzo IK8OZV