[mythtv-users] Firewire channel change for SA4200?

[Christian Szpilfogel]

steve wrote:
> That did it, thanks...BUT
>
> The other problem was that sa3250ch.c was empty (in fact all the files in
> ./contrib/channel_changer/sa3250 were empty).  So I got the file from the
> trunk and compiled it.  On testing it said "sorry device not supported yet."
> Harrumph.  
>
> So I found this post http://ubuntuforums.org/showthread.php?t=712789 which
> gives a modified channel changer  that's supposed to work for my box, the
> complete name of which is SA Explorer 4200HDC.  
>
> I modified it according to instructions to include my box's vendor_id and
> model_id.  I compiled and test-ran it, and got output:
>
> [root at mythtv sa3250ch]# ./sa3250ch -v 20
> node 0: vendor_id = 0x00d00d1e model_id = 0x00000001
> node 1: vendor_id = 0x0000252e model_id = 0x000010cc
> Device acquired on node 1
> Changing channel 20
> AV/C Command: cmd0=0x00487ce7 cmd1=0x04001400 cmd2=0xff000000
>
> Which would seem to indicate that it worked.  However the channel indicator
> on the box did not change.  
>
> Enacting Einstein's definition of insanity, I set it up as the external
> channel changer on mythtvsetup and attempted a record.  Everything appeared
> to run normally, but it didn't actually change the channel (it recorded the
> channel it was originally set to).
>
> On looking at the C code, it appears that the "Device acquired" message
> doesn't result from any actual feedback from the box; it just gets printed
> if it finds a valid id combo from the defined variables.
>
> I'm also not sure what's on node 0.  I don't have any other firewire devices
> connected. Maybe this is the channel for data?
>
> Anyway the question is: Is there some way to get this working
Steve,
Try the one at:
https://wiki.ubuntu.com/majoridiot?action=AttachFile&do=view&target=mythchanger.10f.beta.tar 
<https://wiki.ubuntu.com/majoridiot?action=AttachFile&do=view&target=mythchanger.10f.beta.tar>
and read the README file.