12 Dec
2013
12 Dec
'13
6:01 p.m.
Thanks for this timely update! I just got this R820T based device and
just tried to receive local radio stations to no avail.
I live about 70 miles from town, and get only a few stations here with a
cheap little transistor radio. With the device and rtl_fm, I am lucky to
make out voices in the static.
So, I sent one down to a server I manage that is _under_ a tower. Of
course, I can receive the two stations that broadcast from the tower.
They come in loud and clear! But nothing else. My goal was to be able to
listen to radio stations in town by remote using the server in town, so
I'm limited to shell based applications like rtl_fm. My next step was
going to be GNURadio, if I can make it work headless, but I found this
update last night! Very good timing for me!
Now for the problem(s). What I did on the server was:
git clone https://github.com/keenerd/rtl-sdr rtl-sdr-beta
cd rtl-sdr-beta/
autoreconf -i
./configure
make
and I get this (I cut out the largely irrelevant parts, but can supply
full console output if needed):
rtl_sdr.o: In function `main':
/home/deron/rtl-sdr-beta/src/rtl_sdr.c:128: undefined reference to
`verbose_device_search'
/home/deron/rtl-sdr-beta/src/rtl_sdr.c:202: undefined reference to
`verbose_set_sample_rate'
/home/deron/rtl-sdr-beta/src/rtl_sdr.c:205: undefined reference to
`verbose_set_frequency'
/home/deron/rtl-sdr-beta/src/rtl_sdr.c:209: undefined reference to
`verbose_auto_gain'
/home/deron/rtl-sdr-beta/src/rtl_sdr.c:216: undefined reference to
`verbose_ppm_set'
/home/deron/rtl-sdr-beta/src/rtl_sdr.c:212: undefined reference to
`nearest_gain'
/home/deron/rtl-sdr-beta/src/rtl_sdr.c:213: undefined reference to
`verbose_gain_set'
/home/deron/rtl-sdr-beta/src/rtl_sdr.c:232: undefined reference to
`verbose_reset_buffer'
/home/deron/rtl-sdr-beta/src/rtl_sdr.c:178: undefined reference to
`verbose_device_search'
I see where you have defined verbose_* in convenience.c, but
configuration must not be correctly building/linking it in. I am very
much out of my water with autoconf etal. I suspect you are using some
other method to compile this, so might not be in any better footing than I.
Thanks for you assistance,
Deron
12 Dec
12 Dec
6:20 p.m.
New subject: Big rtl_fm (and more) improvements, testing requested
Wrote too soon. I found alternate build instructions, and:
mkdir build
cd build
cmake ../
make
Works fine. Now for some testing...
Thanks,
Deron
6:24 p.m.
New subject: Big rtl_fm (and more) improvements, testing requested
Hi,
On 12.12.2013 18:01, Deron wrote:
git clone https://github.com/keenerd/rtl-sdr
rtl-sdr-beta
cd rtl-sdr-beta/
autoreconf -i
./configure
make
/home/deron/rtl-sdr-beta/src/rtl_sdr.c:128: undefined reference to
`verbose_device_search'
keenerd added a new sublibrary, but only added it to the cmake
build system as it seems, so you'll have to use cmake to build it.
Regards,
Steve
7:15 p.m.
New subject: Big rtl_fm (and more) improvements, testing requested
Some very basic observations, hope they are useful. Some may be a result
of my (lack of) understanding.
- Control-c will not stop it. It catches the signal, and reports "Signal
caught, exiting!" but does not. I had to kill -9 to stop it...
- When first run, I get 30 logged errors of "xhci_hcd 0000:00:14.0:
ERROR no room on ep ring".
- fm was much better than the old version, but -fmwb was the same. I
narrowed it down to -o 4. That alone destroyed all improvements. By using:
./rtl_fm -f 95.1M -M fm -s 170k -A fast -r 32k -l 0 -E deemp - |
aplay -r 32k -f S16_LE
It was much better. I'll play around more this weekend when I have more
time.
Overall, very good. Night and day compared to before. Also, cpu usage
seemed less. Top reports about 3% vs 6% from before.
Deron
18 Dec
18 Dec
5:23 p.m.
New subject: Big rtl_fm (and more) improvements, testing requested
Hello Kyle,
I had a chance to place with it this weekend, and again last night, and
the only additional problems I had:
- After 20-30 forced quits, the device will go completely bonkers. Ok,
not very technical and hopefully related to the inability to stop it in
general.
- I have no idea how to make scanning work. Is there something I am
missing to force it to continue scanning at the next frequency? Also,
when it finds something that breaks squelch, could it dump to shell the
frequency using stderr?
- I'm using an R820T based device. As I understand it, the offset tuning
is unnecessary. Looking at the code, "-E offset" should do just what I
want. It disables the offset/90deg shift in rtl_fm, and the library
recognizes that is unnecessary and returns -2 or some such. The (very
minor) bug is that it reports it as an error that it is unable to set
the offset.
So what can I do to help find/fix the quit problem?
Thanks!
Deron
Some very basic observations, hope they are useful. Some may be a result
of my (lack of) understanding.
- Control-c will not stop it. It catches the signal, and reports "Signal
caught, exiting!" but does not. I had to kill -9 to stop it...
- When first run, I get 30 logged errors of "xhci_hcd 0000:00:14.0:
ERROR no room on ep ring".
- fm was much better than the old version, but -fmwb was the same. I
narrowed it down to -o 4. That alone destroyed all improvements. By using:
./rtl_fm -f 95.1M -M fm -s 170k -A fast -r 32k -l 0 -E deemp - |
aplay -r 32k -f S16_LE
It was much better. I'll play around more this weekend when I have more
time.
Overall, very good. Night and day compared to before. Also, cpu usage
seemed less. Top reports about 3% vs 6% from before.
Deron
11:31 p.m.
New subject: Big rtl_fm (and more) improvements, testing requested
New feature! If your eeprom serial looks like "ABC 115p" it'll
automatically apply a ppm correction of 115. (The start of the string
can be anything you want, it checks the end for a ppm value.)
The important part is that the ppm value starts with a space and ends
with "p". Works in rtl_fm, rtl_power and rtl_tcp. The automatic
value can be overridden with the command line switch.
Once again, this is in my experimental github repo:
https://github.com/keenerd/rtl-sdr
On 12/18/13, Deron <deron(a)pagestream.org> wrote:
- After 20-30 forced quits, the device will go completely bonkers. Ok,
not very technical and hopefully related to the inability to stop it in
general.
You are the only person to have this problem. More people (myself
included) have found the new code to exit much more gracefully and
consistently. Given that you were getting a bunch of xhci errors it
really sounds like the fault is in libusb or your hardware. What libc
and version of libusb are you using?
To be safe I've added some explicit clean up code that I was letting
the OS handle on exit.
- I have no idea how to make scanning work. Is there
something I am
missing to force it to continue scanning at the next frequency?
As it says in the --help: "use multiple -f for scanning (requires
squelch), ranges supported, -f 118M:137M:25k" If you'd like something
other than rtfm, please provide the exact command you are using.
Also, when it finds something that breaks squelch ...
This is a little more complicated to be useful, but I'm working on it.
- I'm using an R820T based device. As I understand
it, the offset tuning
is unnecessary. Looking at the code, "-E offset" should do just what I
want. It disables the offset/90deg shift in rtl_fm, and the library
recognizes that is unnecessary and returns -2 or some such. The (very
minor) bug is that it reports it as an error that it is unable to set
the offset.
You've got some things confused. "-E offset" should only be used
with E4000 chips. The 90 degree shift (in software) is different from
dongle offset tuning. But I understand what you want to accomplish
and will add support for that.
-Kyle
http://kmkeen.com
3804
days inactive
3810
days old
5 comments
3 participants
participants (3)
-
Deron -
keenerd -
Steve Markgraf