Hy
Ive installed osmo-fl2k on Windows 10
And when i try to release, i have a error message that pthread vc2.dll is not Found.
How can i fix IT?
Télécharger Outlook pour Android<https://aka.ms/AAb9ysg>
Hi,
This is a starter patch to produce a .sigmf-meta file for each
recording. It contains the minimum useful info that is usually coded
into the filename.
I'm not sure if anyone thinks this is worthwhile. There is a lot more
that could be recorded in the .sigmf-meta file like e.g. current gain
values, current bandwidth or antenna settings (if available), but i
wanted to see if there is any interest for this at all.
It would maybe also nice to add the actual sdr device name that was
used, but as far as I can see there is no way in python to query which
device/driver is used by a specific osmosdr.source()?
CU,
Sec
>From 916dd8732302d8d052432a5deb27f132521d0be3 Mon Sep 17 00:00:00 2001
From: Stefan `Sec` Zehl <sec(a)42.org>
Date: Sun, 10 Oct 2021 16:59:32 +0200
Subject: [PATCH] implement simple sigmf support for recording
---
apps/osmocom_fft | 30 ++++++++++++++++++++++++++++--
1 file changed, 28 insertions(+), 2 deletions(-)
diff --git a/apps/osmocom_fft b/apps/osmocom_fft
index f829192cd6..2cdfd3ae35 100755
--- a/apps/osmocom_fft
+++ b/apps/osmocom_fft
@@ -103,8 +103,8 @@ class app_top_block(gr.top_block, Qt.QMainWindow):
help="Set gain in dB (default is midpoint)")
parser.add_option("-G", "--gains", type="string", default=None,
help="Set named gain in dB, name:gain,name:gain,...")
- parser.add_option("-r", "--record", type="string", default="/tmp/name-f%F-s%S-t%T.cfile",
- help="Filename to record to, available wildcards: %S: sample rate, %F: center frequency, %T: timestamp, Example: /tmp/name-f%F-s%S-t%T.cfile")
+ parser.add_option("-r", "--record", type="string", default="/tmp/name-f%F-s%S-t%T.sigmf-data",
+ help="Filename to record to, available wildcards: %S: sample rate, %F: center frequency, %T: timestamp, Example: /tmp/name-f%F-s%S-t%T.sigmf-data")
parser.add_option("", "--dc-offset-mode", type="int", default=None,
help="Set the RX frontend DC offset correction mode")
parser.add_option("", "--iq-balance-mode", type="int", default=None,
@@ -342,6 +342,24 @@ class app_top_block(gr.top_block, Qt.QMainWindow):
s = s.replace('%T', datetime.datetime.now().strftime('%Y%m%d%H%M%S'))
return s
+ def record_sigmf_metadata(self):
+ return {
+ "global": {
+ "core:datatype": "cf32_le",
+ "core:sample_rate": self.src.get_sample_rate(),
+ "core:version": "1.0.0",
+ "core:num_channels": 1,
+ "core:recorder": "osmocom_fft"
+ },
+ "captures": [
+ {
+ "core:sample_start": 0,
+ "core:frequency": self.src.get_center_freq(),
+ "core:datetime": datetime.datetime.utcnow().isoformat()+"Z"
+ }
+ ]
+ }
+
def _set_status_msg(self, msg, timeout=0):
self.status.showMessage(msg, timeout)
@@ -498,6 +516,14 @@ class app_top_block(gr.top_block, Qt.QMainWindow):
print("Recording samples to ", self.rec_file_name)
self.file_sink.open(self.rec_file_name);
+ if self.rec_file_name.endswith('.sigmf-data'):
+ try:
+ import json
+ self.meta_file_name=self.rec_file_name[:-4]+'meta'
+ with open(self.meta_file_name, 'w') as outfile:
+ json.dump(self.record_sigmf_metadata(), outfile, indent=4)
+ except ModuleNotFoundError as e:
+ print("Could not write sigmf-meta: ",e)
else:
self._srw.setDisabled(False)
self._fre.setDisabled(False)
--
2.30.2
CU,
Sec
--
A bureaucracy is like a computer program. Usually, the question is
how to arrange it so that what you want is composed of operations that
the bureaucracy supports. In addition, in any bureaucracy, there is
always *someone* whose job is to approve violations of the rules.
Hy. I recently instal osmo-fl2k on Windows and the software dont open and i have a message that pthreadVC2.dll is not Found.
After research, i Found the dll un the pthread folder. Where must i place the dll for macking IT work?
Télécharger Outlook pour Android<https://aka.ms/AAb9ysg>
Hi,
The USB dongle I am using requires direct mode 2 for sampling the Q branch.
The rtl_fm program assumes that "direct" means mode 1. I added a 2nd option
to allow to select the other mode.
Patch attached.
Regards,
Doug Hammond
Hi,
I'm trying to build gr-fosphor on OSX, GNURadio 3.8 & Python 3.7.10 (built from Macports) but it blows up in a swig wrapper:
[ 80%] Building CXX object swig/CMakeFiles/fosphor_swig.dir/CMakeFiles/fosphor_swig.dir/fosphor_swigPYTHON_wrap.cxx.o
warning: unknown warning option '-Wno-format-overflow'; did you mean '-Wno-shift-overflow'? [-Wunknown-warning-option]
/Users/oconnd1/projects/gr-fosphor/build/swig/CMakeFiles/fosphor_swig.dir/fosphor_swigPYTHON_wrap.cxx:5219:14: error: no viable overloaded '='
result = gr::fosphor::glfw_sink_c::make();
~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Full build log is at https://gist.github.com/DanielO/8a75d1cc2848f773e702d788fa8275b8
I ran cmake like so:
cmake -DGR_PYTHON_DIR=/opt/local/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages -DCMAKE_INSTALL_PREFIX=/opt/local -Wno-dev ..
I am happy to test any patches etc but unfortunately my C++/Swig skills are nonexistent :(
Thanks.
--
Daniel O'Connor
"The nice thing about standards is that there
are so many of them to choose from."
-- Andrew Tanenbaum
Hello,
To avoid confusion, this post is about frequency errors inherent in the
dongle hardware, which is quite separate from crystal drift.
Having noticed that some dongles have impressive frequency stability, I did
some calibration tests, and discovered (as I should have known) that the
limited number length of the dongle hardware tunes to only an approximation
of the requested frequency. In extreme cases the frequency error, i.e. the
difference between the actual frequency and the requested frequency, can be
as much as 1 ppm.
To get around this limitation, I added an experimental function to
librtlsdr.c that returns the *exact* frequency that the dongle is tuned to.
It does this by reading internal registers, and working backwards to compute
the frequency.
Software that makes use of the added function can expect 1 to 2 orders of
magnitude improvement in precision, when a dongle is calibrated at one
frequency and then tuned to other frequencies.
If people here are interested in this work, please let me know where I can
post details, preferably including the occasional graph and table.
Ian
