golay23 as separate library?

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c2gmsk: API version 20130606: auxiliary data service + migration to LGPL

Hi All,

I have just commited API version 20130606 to github.

1/ As discussed before, new in this release (compaired to 20130601) is 
the "auxiliary data service" in the 2400 bps modem.

The procedure works like this:
* on the sending side:
-> the API call "c2gmsk_auxdata_sendmessage" will queue a message to be 
send by the modem.
The text will be send at the rate of 100 bps, or 1 nibble (= 4 bits) per 
audio-frames of 40 ms. The end of the message is marked by a "null" 
marker (i.e. a character containing 0x00).
-> when the text has been completely send, a message 
"C2GMSK_MSG_AUXDATA_DONE" is returned by the API to the modulator when 
the frame containing the last nibble of the terminating null-char has 
been send
-> when no data needs to be send, the "null" character is send

* on the receiving side:
When a stream it being received, a message "C2GMSK_MSG_AUXDATA" is send 
to the API to the application when a complete message has received (i.e. 
when the terminating null-char has been received).

2/ I've also taken the opportunity to change the license on the code 
from GPL to LGPL.

Of course, I have only changed the license of the code written by 
myself. Most other code was already under the LGPL license by their 
respective authors. Only the low-level GMSK DSP-filters are licensed 
under GPL by the author.

The 2400 bps modem still carries the version-id 2400/15 (15 = 
"experimental") as I am still waiting for additional test-results.

73
kristoff - ON1ARF

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How good an oscillator can we get for using narrow channel widths?

This costs less than $1.50 in 2000 quantity: 
http://www.rfm.com/products/data/xtc7006.pdf
If the radio is calibrated, this gets us +-220 Hz at 440. If it's not 
calibrated, we could be several kHz off in total.
And this potentially adds 3-6 mW to the standby power.
It gets to $20 if we want 100 parts per billion of precision.
If we are going to have GPS anyway, we should select one with a 
frequency output, and use that to calculate an offset for our oscillator.

     Thanks

     Bruce

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Improvements to bootstrapping of wxWidgets

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digital data over hf

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Installing using "cmake" on CentOS-6.4 64-bit

Trying cmake on another OS.  Managed to make it this far.  Please no lectures about "root", I'm a SysAdmin and
understand the consequences.  This is a test VM I had available, and it has no user accounts (and I didn't
feel like making any for this simple test).  

yum install gcc gcc-c++ gtk2-devel make svn libarchive libtool-ltdl-devel libsamplerate-devel
libsndfile-devel sox-devel

# cmake wasn't new enough, so installed it from a separate download:
wget ftp://ftp.pbone.net/mirror/ftp5.gwdg.de/pub/opensuse/repositories/home:/cathay4t:/misc-rhel6/CentOS_CentOS-6/x86_64/cmake-2.8.9-3.1.x86_64.rpm
rpm -U cmake-2.8.9-3.1.x86_64.rpm

# Portaudio
wget http://www.portaudio.com/archives/pa_stable_v19_20111121.tgz
tar xzvf pa_stable_v19_20111121.tgz
cd papa_stable_v19_20111121
./configure
make
sudo make install

# Hamlib
# Download hamlib from:  http://sourceforge.net/projects/hamlib/files/hamlib/1.2.15.3/hamlib-1.2.15.3.tar.gz/download?use_mirror=iweb
tar xzvf hamlib-1.2.15.3.tar.gz
cd hamlib-1.2.15.3
./configure
make
sudo make install

# Download and install WxWidgets 2.9.4 from:
#
# http://www.wxwidgets.org/downloads/
#
tar xjvf wxWidgets-2.9.4.tar.bz2
cd wxWidgets-2.9.4
./configure
make
sudo make install

# Download and install libctb:
#
wget https://iftools.com/download/ctb/0.16/libctb-0.16.tar.gz
tar xzvf libctb-0.16.tar.gz
cd libctb-0.16/build
make -f GNUmakefile
sudo make -f GNUmakefile install
# Copy a forgotten include file into /usr/local/include area:
sudo cp ../include/ctb_0.16/kbhit.h /usr/local/include/ctb-0.16/.

# Check out and install FreeDV:
#
mkdir freetel
cd freetel
svn checkout http://freetel.svn.sourceforge.net/svnroot/freetel freetel-code
cd freetel-code/fdmdv2
mkdir linux_build
cd linux_build
rm CMakeCache.txt; cmake .. -DUSE_STATIC_CODEC2=1

# NOTE:  You may need to install additional libraries via "yum", then
# retry the above "cmake" command until it completes successfully.

make clean
make
...
Linking C executable insert_errors
[100%] Built target insert_errors
[ 29%] No install step for 'codec2'
[ 33%] Completed 'codec2'
[ 33%] Built target codec2
Scanning dependencies of target freedv
[ 37%] Building CXX object src/CMakeFiles/freedv.dir/dlg_about.cpp.o
[ 41%] Building CXX object src/CMakeFiles/freedv.dir/dlg_audiooptions.cpp.o
[ 45%] Building CXX object src/CMakeFiles/freedv.dir/dlg_filter.cpp.o
[ 50%] Building CXX object src/CMakeFiles/freedv.dir/dlg_options.cpp.o
[ 54%] Building CXX object src/CMakeFiles/freedv.dir/dlg_ptt.cpp.o
[ 58%] Building CXX object src/CMakeFiles/freedv.dir/fdmdv2_main.cpp.o
[ 62%] Building CXX object src/CMakeFiles/freedv.dir/fdmdv2_pa_wrapper.cpp.o
[ 66%] Building CXX object src/CMakeFiles/freedv.dir/fdmdv2_plot.cpp.o
[ 70%] Building CXX object src/CMakeFiles/freedv.dir/fdmdv2_plot_scalar.cpp.o
[ 75%] Building CXX object src/CMakeFiles/freedv.dir/fdmdv2_plot_scatter.cpp.o
[ 79%] Building CXX object src/CMakeFiles/freedv.dir/fdmdv2_plot_spectrum.cpp.o
[ 83%] Building CXX object src/CMakeFiles/freedv.dir/fdmdv2_plot_waterfall.cpp.o
[ 87%] Building CXX object src/CMakeFiles/freedv.dir/hamlib.cpp.o
[ 91%] Building CXX object src/CMakeFiles/freedv.dir/topFrame.cpp.o
[ 95%] Building C object src/CMakeFiles/freedv.dir/sox_biquad.c.o
/root/src/we7u/freetel/freetel-code/fdmdv2/src/sox_biquad.c: In function 'sox_biquad_filter':
/root/src/we7u/freetel/freetel-code/fdmdv2/src/sox_biquad.c:98: warning: passing argument 4 of
'lsx_biquad_flow' from incompatible pointer type
/root/src/we7u/freetel/freetel-code/fdmdv2/src/sox_biquad.c:37: note: expected 'size_t *' but
argument is of type 'unsigned int *'
/root/src/we7u/freetel/freetel-code/fdmdv2/src/sox_biquad.c:98: warning: passing argument 5 of
'lsx_biquad_flow' from incompatible pointer type
/root/src/we7u/freetel/freetel-code/fdmdv2/src/sox_biquad.c:37: note: expected 'size_t *' but
argument is of type 'unsigned int *'
[100%] Building C object src/CMakeFiles/freedv.dir/varicode.c.o
Linking CXX executable freedv
CMakeFiles/freedv.dir/sox_biquad.c.o: In function `sox_biquad_finish':
sox_biquad.c:(.text+0x203): undefined reference to `sox_quit'
CMakeFiles/freedv.dir/sox_biquad.c.o: In function `sox_biquad_start':
sox_biquad.c:(.text+0x223): undefined reference to `sox_init'
collect2: ld returned 1 exit status
make[2]: *** [src/freedv] Error 1
make[1]: *** [src/CMakeFiles/freedv.dir/all] Error 2
make: *** [all] Error 2

# The next command would have been:
sudo make install

--

-- 
Curt, WE7U.        http://wetnet.net/~we7u
Windows ate my homework!

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Are we ready to remove autotools in fdmdv2?

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Alternative to the Rpi/BeagleBone

Hi all,

Just stumbled across this little board:
http://www.dontronics-shop.com/olimex-imx233-olinuxino-micro.html

I worked with an i.MX27 MCU when I was working at Jacques, and it wasn't
a bad piece of kit.  There they were using boards made by Ka-Ro, which
incorporated an i.MX27 on a SO-DIMM module.

Yes, the Linux kernel shipped with the things was ancient, but without
too much trouble I managed to port the Penguitronix git tree over to
them at the time.

This Olimex board seems to have most of the peripherals one would need
on the GPIO headers themselves, including stereo audio in/out ports.

The board costs about as much as a Raspberry Pi, one downside is that it
has less RAM.  I'm digging around to see if it has hardware float;
apparently it's an optional feature of the ARM926EJ-S.
--

-- 
Stuart Longland (aka Redhatter, VK4MSL)

I haven't lost my mind...
  ...it's backed up on a tape somewhere.

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freedv.org upgrade

Freedv.org is getting its Debian release upgrade. There might be some 
web site downtime this evening.

     Thanks

     Bruce

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PTT Issues with latest SVN (1312)

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