8 Jul
2015
8 Jul
'15
9:17 p.m.
Hello,
now tested the binary compiled on RPi 1 on the RPi 2 - after copying the
full source including build directory of cmake and executing "sudo make
install" on the RPi 2.
The result: this works fine!
Do i have to conclude, that Raspbian's g++/gcc compiler does produce
wrong code when executed on RPi 2 ?!
gcc/g++ (Debian 4.6.3-14+rpi1) 4.6.3
OK, now verify: make clean, rebuild and install new binary (from the
build directory copied from RPi 1):
this works! but, i don't understand why!
Now reboot, so that kernel module reloads: still works!
In the end, i'm happy that it works "somehow". But, i've no idea where
the problem lies!
kind regards,
Hayati
Am 08.07.2015 um 09:38 schrieb "Hayati Aygün":
Hi Marcus,
librtlsdr is OK, because rtl_tcp works fine, which transfers full I/Q
spectrum of ~ 1.4 MHz to SDR# on Windows/PC.
The problem must lie in rtl_fm. By the way, the I/Q demodulation "raw"
mode is erroneous, too, when having compiled on Raspberry Pi 2.
Something else i could try: use the binary compiled on Raspi 1 B+ on
the Raspi 2. I'll check this, this evening.
Before going for painful debugging, it would be fine if someone else
could reproduce the problem .. or say that it works fine.
kind regards,
Hayati
*Gesendet:* Mittwoch, 08. Juli 2015 um 08:30 Uhr
*Von:* "Marcus Müller" <marcus.mueller(a)ettus.com>
*An:* osmocom-sdr(a)lists.osmocom.org
*Betreff:* Re: NBFM problem with rtl_fm on Raspberry Pi 2
Hi Hayati,
I'm totally not used to development on Raspbian, but:
It's really strange that running the same software on the same distro
with the same RF device would give different results.
So, debugging is on :/ I'd say you should use rtl_sdr to get raw IQ
samples, and then have a look at them on your PC. If they are ok, one
would have to look a bit deeper into rtl_fm, if not, something goes
wrong on the librtlsdr side of things.
Best regards,
Marcus