Date: Fri, 22 Aug 1997 15:34:32 -0500 (CDT) From: Kyle Mestery <mestery@winternet.com> To: Steve Passe <smp@csn.net> Cc: Amancio Hasty <hasty@rah.star-gate.com>, Kenneth Merry <ken@gt.ed.net>, freebsd-multimedia@FreeBSD.ORG Subject: Re: Problem with my Wincast, fxtv Message-ID: <Pine.GSO.3.96.970822153144.10338A-100000@tundra.winternet.com> In-Reply-To: <199708171819.MAA07175@Ilsa.StevesCafe.com>
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On Sun, 17 Aug 1997, Steve Passe wrote:
> b4 doing that, try turning on AFC (auto freq control) I think fxtv has a menu
> item for that, but if not, use ioctl TVTUNER_SETAFC. this will cause the
> tuner code to adjust the selected frequency within a +-5 mHz range while
> polling the hardware for a "centered" signal.
>
> ---
> if that doesn't help a crude userland auto scan would be something like:
> ******************** THE FOLLOWING IS ALL THEORY ***********************
>
> #define AFC_BITS 0x07
> #define AFC_FREQ_MINUS_125 0x00
> #define AFC_FREQ_MINUS_62 0x01
> #define AFC_FREQ_CENTERED 0x02
> #define AFC_FREQ_PLUS_62 0x03
> #define AFC_FREQ_PLUS_125 0x04
>
> #define BOTTOM (unsigned long)(55.25 * 16)
> #define TOP (unsigned long)(655.25 * 16)
>
> int afcon = 1;
> unsigned long freq, freq2, status;
> int fd;
>
> fd = open( ... );
>
> if ( ioctl( fd, TVTUNER_SETAFC, &afcon ) < 0 ) {
> ERROR;
> }
>
> for ( freq = BOTTOM; freq < TOP; freq += (6.0 * 16) )
> {
> printf( "\ntrying freq: %f", (double)((double)freq / 16.0) );
> if ( ioctl( fd, TVTUNER_SETFREQ, &freq ) < 0 ) {
> ERROR;
> }
> if ( ioctl( fd, TVTUNER_GETFREQ, &freq2 ) < 0 ) {
> ERROR;
> }
>
> if ( ioctl( fd, TVTUNER_GETSTATUS, &status ) < 0 ) {
> ERROR;
> }
> if ( !(status & 0x40) ) {
> printf( ", no lock (?)\n" );
> sleep( 1 );
> continue;
> }
>
> /** XXX not sure about the / 16 */
> printf( "\nafc picked freq: %f", (double)((double)freq2 / 16.0) );
>
> printf( ", hit return to continue..." );
> gets();
> }
> --
> Steve Passe | powered by
> smp@csn.net | Symmetric MultiProcessor FreeBSD
>
>
I followed Steve's advice and wrote the above, touching it up. It
basically scans through all hte channels like Steve said. Still though, I
dont get anything new. I still get channels 2-6, 14-20, and 95-99. I
dont get 7-13 and 21-94. Or so I thought. Turns out I get some channels
in the range of 60-70, but they are the channels that should be in the
range of 7-13, and they only come in marginally well with a lot of fuzz.
Does this still sound like a bad tuner, because I would like to return the
card if it is a bad card. Thanks all!
Kyle Mestery
StorageTek's Network Systems Group
7600 Boone Ave. N., Brooklyn Park, MN 55428
mesteka@anubis.network.com, mestery@winternet.com
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