On Monday 26 September 2005 03:23 pm, Taylor Jacob wrote: > I have been very busy with work today, and would have > posted this earlier.. Sorry. > > Here is the "cleaned up" patch for adding support for the > Air2PC/Airstar2 HD5000 (LGDT3303 Frontend). > > http://www.digitalregime.com/patches/hd5000-cleanup.patch > > Changes to note from the last one I submitted are: > > - I have tried to impliment the SNR for the LGDT3303 > since it appears to be the same formula for the 3302 and > 3303.. > > - I have also tried to impliment the signal level based > on information I was provided by BBTI.. I am not sure if > this is correct for the 3302, and it is a unitless > measure since I have no idea how it was calcualted.. I > would need to spend some time digging it spec sheets for > both and see if I can come up with something, but I only > have the 3303 right now.. > > - The serial_mpeg value needed to be set to 0x04 for the > demux to return data.. I am not sure as to why but the > suggested value of 0x40 didn't return any data from teh > demux. (Could this have something to do with the wiring > of the frontend to the demux?) This bit is related to the wiring. When the 0x40 bit is set it uses only 1 data line to transfer the data serially. Only one of the data lines needs to be connected for serial mode. When the bit is 0, 8 data lines are used to transfer the data in parallel. In order to use parallel transmission the receiving chip must also use parallel mode and have all 8 data lines connected. If the transmission is actually parallel then the correct value is 0x00. Assuming that you do have a lgdt3303 chip the 0x04 value selects 32QAM mode of J83 ANNEX-C. Fortunately J83 ANNEX.C is not selected so it has no effect. > - The frontend reset delay added to flexcop.c was reduced > from 100 or 200ms to a reasonable 1ms which gives > adequate time for the 3303 to reset.. Good! > Also to note: > > I have also put together a few liner patch to make the > older version of the DVICO FusionHDTV Gold3 work.. I have > one that has a LGDT3302 and has a card id of 18ac:d800 > instead of 18ac:d820 > (CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_T), but appears to be > the same.. I will validate this and post this > seperately.. Does this card support QAM? They once made a card that does not support QAM. I think the name was just "DViCO FusionHDTV 3". > Taylor -- Mac
