[linux-dvb] Anubis Electronics "Lifeview"(0x10fd:0x1513)

Pierre Willenbrock pierre at pirsoft.de
Wed Mar 7 13:58:03 CET 2007


Hartmut Hackmann schrieb:
> Hi,
> 
> Aapo Tahkola schrieb:
>> On Sat, 3 Mar 2007 03:10:41 +0200
>> Aapo Tahkola <aet at rasterburn.org> wrote:
>>
>>> On Fri, 02 Mar 2007 23:06:15 +0100
>>> Pierre Willenbrock <pierre at pirsoft.dnsalias.org> wrote:
>>>
>>>> Michael Krufky schrieb:
>>>>> Pierre Willenbrock wrote:
>>>>>> Hi list,
>>>>>>
>>>>>> I am owner of a "MSI DIGIVOX mini-II". I got it to work using the
>>>>>> attached patch and firmware. The patch and firmware are the
>>>>>> result of analyzing some usb logs from windows.
>>>>>>
>>>>>> The patch breaks all users of tda10046, as i don't understand how
>>>>>> that chip is supposed to work. The same goes for my driver
>>>>>> implementation of the Philips 8275a.
>>>>>>
>>>>>> So this mess needs to be fixed before it can go into the
>>>>>> repository.
>>>>>>
>>>>>> The patch is against a fresh hg checkout from
>>>>>> http://linuxtv.org/hg/v4l-dvb at 2007-02-22 21:00 UTC.
>>>>>>
>>>>>> Regards,
>>>>>>   Pierre
>>>>> Pierre-
>>>>>
>>>>> I am very happy to hear that you got this device working...
>>>>> Interestingly enough, we have already created a new tda827x dvb fe
>>>>> module, which might be better for your device...  This new tda827x
>>>>> module has not yet been merged into the master v4l-dvb repository,
>>>>> but it will be soon.  Could you try to use the code located in:
>>>>>
>>>>> http://linuxtv.org/hg/~hhackmann/v4l-dvb
>>>>>
>>>>> The tda827x module will be able to detect the difference between
>>>>> the tda8275 and the tda8275a ...  You do not have to fill the
>>>>> callback functions in the config struct -- that is really meant as
>>>>> a hack for some required GPIO handling in the saa7134-dvb driver
>>>>> for input switching.
>>>>>
>>>>> If you can generate a new patch against the repository above, it
>>>>> would make it _much_ easier to integrate your patch into the
>>>>> sources.   After you get that done, we can work out the tda1004x
>>>>> differences.
>>>>>
>>>>> You might also want to speak to aett and friedrich, regulars of
>>>>> the #linuxtv irc chat room on irc.freenode.net ... aet is the
>>>>> author of the m920x driver, and friedrich has the same device
>>>>> that you have. They have been working on it, but haven't yet
>>>>> gotten successful results.
>>>>>
>>>>> Good work!  Hopefully we can clean this up after you generate a
>>>>> new patch using the tda827x module from hhackmann's repository.
>>>>>
>>>>> Regards,
>>>>>
>>>>> Mike Krufky
>>>>>
>>>> Hi Mike and Hartmut,
>>>>
>>>> this time, the patch does not change tda827x.c at all. I fiddled
>>>> with the PHY2 value in tda1004x.c and found it to be related to the
>>>> IF(there seems to be some factor between the IF and PHY2 introduced
>>>> somewhere else). This leaves some differences in tda1004x.c. I don't
>>>> know what to do with these, so i would be glad to get any hints.
>>> Updated patch. I'm fine with these m920x changes.
>>>
>> Signed-of-by: Aapo Tahkola <aet at rasterburn.org>
>>
> PHY2 indeed defines the IF frequency relative to the sampling frequency.
> If you need a different value here, the reason most probably is the
> following:
> In some countries, i.e. Britain, France and Australia, the tranmitters
> are +/- 166kHz off the channel center frequency. This isn't documented.
> You can compensate this by simply tuning to the actually used channel
> center frequency.
> 

The windows driver used an IF of 4.75MHz for UHF, so i resorted to
hardcoding it to 4.75MHz in tda827x.c, while using PHY2, WREF and the
other settings from an usb log. After changing PHY2 the hack in
tda827x.c is no longer needed. This leaves me with these settings for
UHF(cannot test VHF -- i don't get any channels in that range):

CONFPLL2=7 //52MHz sampling clock?
FREQ_PHY2=0xc4f
TIME_WREF1..5=0x5b, 0x02, 0xd0, 0x2d, 0x03

> A note: Some channel decoders can compensate this offset automatically.
> The tda10046 needs assistance from the driver for this. This is not
> built in yet.
> 
> Hartmut

Regards,
  Pierre



More information about the linux-dvb mailing list