FC0012 tuner

Mathias Coinchon coinchon at yahoo.com
Mon Mar 19 17:53:31 UTC 2012


Hello again,

I tried to make a driver for FC0012 based on kernel driver you gave me and comparing with your FC0013 implementation. It delivers noise and some carriers but doesn't seem to tune at all as the output is the same whatever the frequency.
I assume that I have to set the register differently at opening and at the tuning but this is impossible to guess what to put in without the chip datasheet. I tried some tweaks but without success. The original driver itself looks a bit confusing with lots of mods in comments and I wonder if it has been set with values for DVB-T only as it is only what is supported in linux for these USB based on this chip at the moment.


I should maybe better buy a new ezcap key with an E4000 tuner or Noxon


Cheers


Mathias



________________________________
 De : Steve Markgraf <steve at steve-m.de>
À : Mathias Coinchon <coinchon at yahoo.com> 
Cc : "osmocom-sdr at lists.osmocom.org" <osmocom-sdr at lists.osmocom.org> 
Envoyé le : Lundi 19 mars 2012 14h08
Objet : Re: FC0012 tuner
 
Hi,

On 19.03.2012 13:43, Mathias Coinchon wrote:
> I have an ezcap ez646 USB stick, based on rtl2832u but this one has a
> FC0012 tuner chip.
> I wondered if some of you had information or clues about this tuner as
> you have developped the driver for the FC0013.

The FC0013 driver was taken from the Linux kernel driver that Realtek
released, so can be the FC0012 driver.

See:
http://grok.osmocom.org/source/xref/x-misc-rtl2832u-kernel3/RTL2832-2.2.2_kernel-3.0.0/tuner_fc0012.c

I don't have a stick with a FC0012 yet, but might get one in the next
days. I will add support as soon as I get my hands on it.

It also needs some code to control the GPIOs of the RTL2832, since you
have to toggle a pin of the FC0012 to switch between bands.

Regards,
Steve
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