[mythtv-users] Firewire Channel Changing on SA4250HDC

[John Hannan]

Have you tried using the -s option on the channel changing script?  That did
the trick for me.

On 10/4/07, Daniel Arfsten <darfsten at hotmail.com> wrote:
>
> Rob,
> I am interested in knowing that's it is possible that my cable company may
> have my sa3250hd NOT accepting the tune command of the sa3250ch channel
> changing script either. I have been unsuccessful for over 40 hours of
> testing and playing around and googling, ensuring I was using the latest
> test-mpeg2 and firewire_tester, and sa3250ch channel changing script to no
> avail. My vendor code is in there and it appears to work but it just
> doesn't
> work! Here's my thread.
> http://www.gossamer-threads.com/lists/mythtv/users/290860?#290860
> Maybe you can point out anything that I may be doing wrong?? I should just
> call them and make sure the "tune" functionality is "enabled" on my boxes.
> I
> did specifically tell them that I needed the ports enabled for using it
> with
> my TIVO, just because I didn't want to haev to explain mythtv. What's
> weird
> is that I can capture my local stations with test-mpeg2 but no channel
> changing no matter what I do????? I don't even really care about being
> able
> to capture stuff, I just want to use s-video out on the cable box and use
> firewire to set the channel for mythtv to record but it's not working.
>
> Daniel
>
>
>
> Re: [mythtv-users] Firewire Channel Changing on SA
>
> Has anyone had any luck with getting this STB to recognize
> channel change
> commands?
>
> I've tried the firewire_changer code that Jim provided, and I'm
> getting
> exactly the same results that Brian got; failure on the
> individual buttons,
> and reported (but not actual) success on the the tune method.
>
> I've modified the sa3250ch code to allow me to send hex commands
> to the STB
> and have been using the (admittedly old, but freely available)
> AVC 3.0 spec
> (http://pbx.mine.nu/dvhs/AVC_30.pdf), the avc1394.h file, and
> various web
> pages as guides.
>
> I've been tinkering away at this for the last week, and so far
> the only
> thing that has worked is detecting the current power state of
> the STB:
>
> When power is off (via the power button on the STB):
> AV/C Command: cmd0=0x01ffb27f cmd1=0x00000000
> Response: 0x0CFFB260 cmd1=0x00000000
> * *
> When power is on (via the power button on the STB):
> AV/C Command: cmd0=0x01ffb27f cmd1=0x00000000
> Response: 0x0CFFB270 cmd1=0x00000000
>
> I believe this box is supposed to meet the requirements of
> FCC-03-225 (
> http://hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-03-225A1.pdf<
> http://http//hraunfoss.fcc.gov/edocs_public/attachmatch/FCC-03-225A1.pdf>)
> which  requires STB's to support the pass through tune command
> as described
> in the non-freely available CEA-931-A spec. I am willing to
> purchase
> CEA-931-B (which superseded CEA-931-A) in order to try to go
> further.
>
> I can't believe that I'm the first person to work though this
> (I'm not that
> original ;) ). Does anyone already have this spec? I am aware
> that the spec
> is copyrighted, and I'm not looking for a free copy, but does
> that prevent
> implementing it? What am I missing?
>
> Rob
>
>
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