On Sat, 12 Mar 2005 22:04:14 -0600 Timothy Folks <[EMAIL PROTECTED]> wrote:
> On Saturday 12 March 2005 09:50 pm, Tyler Trafford wrote: > > Okay, I finally went and looked at 'd'. Is the only thing you changed > > the audio standard? > > Yes. > > > You didn't touch the CX25840_SET_PATH1_SEL_CTL ? > > No, I didn't. > > > In 'd' that was set to 0, but is now set to 0 only for cards that > > aren't NTSC. (It's 2 for NTSC now. I get no sound on anything else.) > > I just now patched version i to set CX25840_SET_PATH1_SEL_CTL = 0 and got > loud, medium-pitched white noise and no tuner audio at all. I have seen tuner audio on my NTSC retail 150 version with this register set to both 0 and 2 depending on the settings of the audio/video standard registers. What it is -supposed- to do according to the datasheet is switch between the tuner audio decoder input internal to the chip and the serial audio input which is used for the line input (there's an external analog to digital converter chip on the board). There seems to be some interaction between the audio format select registers and the path select registers with the ivtv code and the hardware. I have not been able to characterize it and it has acted differently between some of the sub-versions. If you believe the datasheets, it should be set to 0 for the tuner and 2 for the line input. I have not had time to to extensive hacking on the 0.3.2i code but now that we can bit-bang the registers individually while the chip is running we should be able to characterize this. I also bit-banged the input select registers to see what they did and they seem to work as the datasheet describes. I also agree there are several versions of this card. For instance, my tuner doesn't auto-detect with ANY of the versions of ivtv. I have to force it to 39 with a module parameter and then it works perfectly. Go figure. ----- Jim Reese, WD5IYT [EMAIL PROTECTED] ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ ivtv-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ivtv-devel
