[linux-dvb] Re: dvb-s USB Technotrend: unknown STC version V2.2

[John Dalgliesh <johnd@defyne.org>]

On Mon, 26 Jul 2004, Stefan Grotehans wrote:
>
> Folks,
>
> Holger's remarks are right!
>
> Here is the status of my efforts:
>
> 1) I implemented a new tuner type in stv0299.c.  Since the new box ver 2.2 has a ALPS BSBE1
> tuner. This tuner model has only two small differences to the BSRU tuner. However I will need
> Holgers's help to distinguesh between the old and the new USB box. (should be easy though).
> This works with all versions of the driver. 1.1.1, 2.4 or 2.6.

Does it say stc version 2.2 for you as well? That sounds like a good way
to detect it (but I still don't full understand the linux driver
architecture, so maybe this is not easy ;)

> 2) Further, I compiled the new firmware from the windows file to have the lastest firmware
> downloaded on the USB box. The impact of this is for me unkown since I did not test the
> original firmware of the older devices.

Are you talking about the one that's 13316 bytes (vs the 13104 one in cvs
... which is very dodgy by the way guys!) or is there an even newer one? I
have tried both the one in cvs and the one included with the v2.17 drivers
(but not v2.17d) and I couldn't tell the difference - on my hardware
anyway.

> 3) the diseq stuff in the new hardware is broken with the old driver.
>
> In dvb-ttusb-budget.c the call "ttusb_update_lnb" ist not switching between 13 and 18 Volt, I
> only see 18 volt. This pre! vents the tuning to the horizontal channels.

Are you sure the code there has any effect? Isn't it the frontend that
actually does the switching? I have to set up the voltage in the TDA8083
on my hardware. I certainly couldn't switch voltages before doing that ...
but maybe you need to do both.

> However the function still switches the voltage on even on the new hardware.

Yeah I think that function only successfully controls the power.

> I askes TT to give me a hint, even via Axel Hundt, but no response yet. Since I cannot
> disassemble windows code I am a little lost here. This is the last issue!

I would look at the different options for setting the voltage in the
stv0299 driver. There seem to be a lot!

> All the above stuff 1) + 2) I can send you over.
>
>
>
> Stefan

btw Also not sure if the linux driver uploads the firmware properly if it
is not a multiple of 28 bytes ... I doubt it's your problem if you've got
so far, but might be worth a look.

btw2 I might be very confused but doesn't 18 volts => horizontal? So if
you only see 18 volts then it would prevent you tuning to the _vertical_
channels, and you would get the horizontal ones fine.


>
> Holger Waechtler <holger@qanu.de> schrieb am 20.07.04 21:28:12:
> >
> > John Dalgliesh wrote:
> > > On Tue, 20 Jul 2004 sandrofag@tiscali.it wrote:
> > >
> > >>I have bought a DVB-s of Technotrend USB, and have tried to install linuxtv.org
> > >>driver, but it does not work, dmesg give me:
> > >>...
> > >>ttusb_init_controller: unknown STC version V 2.2, please report!
> > >>...
> > >>
> > >>No signal is found them from scan app.
> &gt! ; >>
> > >>do firmware is changed?
> > >
> &g t; >
> > > Cool, AFAIK that version comes from the hardware, not from the firmware.
> > >
> > > Also, an unknown version does not stop the progress of the driver
> > > initialisation, so if it doesn't work (and you have the right frontend
> > > modules loaded, etc.) then there could be some other hardware changes that
> > > the version number implies.
> >
> > As far I heard this box has a Alps BSBE1 tuner can based on the stv0299.
> > Stefan Grothehans started working on some patches and if I remember
> > correctly he got the box working for all channels transmitted on the
> > horizontal polarized plane.
> >
> > So it probably takes only a few more disassembly and guessing efforts to
> > get the other channels working, too. I added him to the cc: list, so
> > please better contact him directly to synchronize your efforts.
> >
> > Holger
>
>
>
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