Hello All
I am working on the TechnoTrend USB C-1200
http://www.dvbshop.net/product_info.php/info/p23_Technotrend-Connect-USB-C1200.html
to add support for this device in Linux. The C-1200 has the same USB ID
like the C-1100 (0b48:1004, which works already in Linux) but my device
uses a different tuner and demodulator (Philips TD1316A/
STMicroelectronics stv0297).
I can recive pictures now :-) but I had to change the frequency
calculation for the tuner a lot (code from the PCI implementation). Can
anybody explain me the Bytes/Bits in the I2C tuner message?
045089 ms >>> aa 9b 31 08 c0 05 00 15 e2 c8 6a 80 -> 5602: 314 MHz S22
Starting from c0 (Byte 4), this is the I2C address of the tuner, next
byte (Byte 5) is the packet lenght. Next (Byte 6) I don't know. Byte 7
and 8 is the frequency. The next two bytes (Byte 9, Byte 10) are some
flags for the tuner.
Byte 9 is set to 0xc8 in the Linux driver and has the same value in the
winsnoop too.
I need some more infos on Byte 10:
What means "charge pump" (bit7..5)?
What does the "filter" do (bit3)?
And when do I have to switch the Band -> what is the range of the tuner
(bit2..0)?
Is there a datasheet available for this tuner?
Regards, Thomas
--
http://www.kaiser-linux.li
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