18 Jul
2015
18 Jul
'15
5:12 p.m.
Hi Osmocom guys,
please consider merging the 2 attached patches.
The first patch:
added option -L to print current level values
added option -c to configure de-emphasis time constant for wbfm
added option -v to print verbose (debug) output
added alias modulation names nbfm, nfm, wfm
now the options in detail:
option -L:
"rtl_fm -L 10 -M fm": prints current level to stderr, every 10th
calculation. This allows monitoring of the noise (or signal) level, to
help setting an optimal squelch threshold.
option -c:
"rtl_fm -M wbfm -c 50" uses de-emphasis time constant for europe.
One might also write "-c us" to use the north american 75 microSec standard.
"-c eu" will use the european 50 microSec standard.
option -v:
"rtl_fm -v 1 -f 99.3M" displays verbose debug information on calculation
of frequency, so that user might understand how/what frequency is tuned to.
modulation names:
found myself writing "wfm" instead of "wbfm". now the aliases are
also
accepted.
The second patch:
added dc filter on raw data (after decimation) with option "-E rdc"
added option "-q" for setting averaging speed for "rdc"
added option "-E adc" in addition to "-E dc"
Please have a look in my previous mail with subject
"rtl_fm: degraded demodulation caused by self-introduced DC !?"
to understand the reason for a second dc filter.
kind regards,
Hayati
Am 18.07.2015 um 16:26 schrieb Marcus Müller:
Hi Hayati,
I'm pretty sure git.osmocom.org is the upstream; to ask steve-m to merge
your changes into his repository, just log on to github, go to
https://github.com/hayguen/librtlsdr, and you should see something like
"This branch is 2 commits ahead of steve-m:master Pull Request"
right at the top, just under the header where you can select your branch.
The Impressum of osmocom.org said to send in patches via this mailing
list, so that's what I did once, and that worked too :), so assuming
steve-m's repo is called "steve-m" in your git ("git remote -v"
will
tell), and the modified master branch being currently checked out
git format-patch steve-m/master
will generate a patch file for each commit between your master's HEAD
and steve-m/master.
Greetings,
Marcus
On 18.07.2015 16:06, Hayati Ayguen wrote:
Hi,
just wanted to ask, what to do, so that my changes on
https://github.com/hayguen/librtlsdr get merged into
https://github.com/steve-m/librtlsdr ?
Just now, in this moment, i realize, that there's alos
git://git.osmocom.org/rtl-sdr.git referenced at
http://sdr.osmocom.org/trac/wiki/rtl-sdr
Ok, which is the real origin for rtl-sdr?
What is needed to get the changes there?
Besides the changes on rtl_fm i've developed a small tool, i called
"stdin2wav". It's used by piping rtl_fm's output into stdin2wav, which
then saves the output into wave files using libsndfile.
Besides saving, it can be combined with the squelch function of rtl_fm.
stdin2wav closes the wave file when no more data comes from stdin .. and
re-opens a new wave file when new data arrives, cause the squelch
opened ..
Can/should this small tool also merged to rtl-sdr? Someone has a better
place?
By the way: someone has a better name?
kind regards,
Hayati