[mythtv-users] Changes to 6200ch.c for new DCH3200 (vendor id 2374)

[JS Boyd]

Hi Ben,

I map HDHomerun channels to channel numbers that are the same as
Comcasts plus a ".5" MythTV lets you assign any number to a channel ou
want, its the XMLTVID that determines the schedule associated with a
channel. You can make these changes by using "Watch TV" and hitting 'e'
while watching. This will show a screen that allows you to edit the
current channel number, name and XMLTVID.

So channel 806 on Comcast would be channel 806.5 if received by the
HDHomerun.

Mapping the HDHomerun to slightly different channel numbers than
Comcasts makes debugging easier when Comcast eventually remaps some of
the clear QAM channels and  the ones who have programmed stop working.
They do this at least once a year in my experience.

Comcast does not provide mapping between their real QAM channels like
25-1 to their virtual channels 806 except within their set top boxes. So
you have to remap the channels yourself when ever they move them.

I've also had Firewire working, but found that it was only about 80%
reliable on Comcast and have since installed an HD-PVR which works 99.9%

JSB.

Ben Giddings wrote:
> Hi,
>
> I just got around to getting comcast digital in Cambridge, MA.  They 
> gave me a DCH3200 STB, and I'm happy to report that I'm able to change 
> channels and get video over its firewire port.  I'm also using a HD 
> Homerun and the STB gives me channels on its firewire port that the 
> Homerun doesn't pick up (Sci Fi in HD for example), so I assume 
> they're scrambled/encrypted/whatever.
>
> It did require one change though.  The DCH3200 has a vendor ID that 
> isn't recognized by 6200ch.  I made a couple of minor changes and now 
> it works, so I'd like to submit a patch for that.  I also verified at 
> the IEEE's website and sure enough, the new ID is registered to 
> Motorola.  Since I don't know how the list treats attachments I'll 
> just do it inline.  If someone wants it as an attachment, just tell me 
> where to send it.
>
> One question though.  As I was adding the cable box, I came across the 
> problem of how to make the DCH3200 and Homerun co-exist.  They're both 
> feeding off the same "source", but they're pretty different beasts.  
> The HD Homerun only picks up the unencrypted, digital stations, which 
> are a small subset of the ones listed as "Comcast Digital Cable", but 
> it does pick up a bunch of stations that aren't listed under "Local 
> Broadcast Listings - Antenna", using SchedulesDirect's naming.  Also, 
> Comcast uses "806" for the local fox digital channel number, but the 
> HD Homerun picks it up as 25-1.  What's the best way to get the two to 
> co-exist?  It seems like it would be two listings on SchedulesDirect: 
> "Comcast Digital Cable" and "Comcast Digital Cable Unencrypted", or 
> something along those lines.
>
> Anyhow, here's the patch to 6200ch.c
>
> I also modified firewiredevice.cpp as requested.  The change I made 
> looks reasonable there, but I haven't compiled it to see if it is 
> correct, so take that one with a grain of salt:
>
> == snip ==
> Index: libs/libmythtv/firewiredevice.cpp
> ===================================================================
> --- libs/libmythtv/firewiredevice.cpp    (revision 20441)
> +++ libs/libmythtv/firewiredevice.cpp    (working copy)
> @@ -418,7 +418,7 @@
>      const uint64_t motorola_vendor_ids[] =
>      {
>          /* DCH-3200 */
> -        0x1c11,
> +        0x1c11, 0x2374,
>          /* 3416 */
>          0x1bdd,
>          /* 3412 */
> Index: contrib/channel_changers/6200ch.c
> ===================================================================
> --- contrib/channel_changers/6200ch.c    (revision 20441)
> +++ contrib/channel_changers/6200ch.c    (working copy)
> @@ -34,6 +34,7 @@
>  // WARNING: Please update firewiredevice.cpp when adding to this list.
>
>  #define DCH3200_VENDOR_ID1 0x00001c11
> +#define DCH3200_VENDOR_ID2 0x00002374
>  #define DCH3200_MODEL_ID1  0x0000d330
>
>  #define DCT3412_VENDOR_ID1 0x0000159a
> @@ -219,6 +220,7 @@
>
>        // WARNING: Please update firewiredevice.cpp when adding to 
> this list.
>        if ( ((dir.vendor_id == DCH3200_VENDOR_ID1) ||
> +            (dir.vendor_id == DCH3200_VENDOR_ID2) ||
>              (dir.vendor_id == DCT3412_VENDOR_ID1) ||
>              (dir.vendor_id == DCT3416_VENDOR_ID1) ||
>              (dir.vendor_id == DCT3416_VENDOR_ID2) ||
> == snip ==
>
> Ben
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users



-- 
==
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