Comcast XMP question for 6131(extender)

[ElizabethD]

I've collected all signals from an unnamed Comcast remote for Thomson CBL box by IRscope and Widget.
Then I made a KM upgrade using the JP1 XMP protocol. The OBCs in the file is actually identical to what Rob posted as "Thomson_DCI1011_(Comcast).txt" I can't find the exact link at this point

The upgrade did not work the Comcast box DCI1101. Not one button.

Then I remembered RTFM, read KM protocols help. Therein it says if even one decode is not XMP-1 use UEI and not JP1.
I read what I can about this XMP difficult protocol, but don't get it. And KM help talks about OBC-2, what's that?

One, only one, of the decodes - for number zero - is XMP-1/2. I can't see any difference in the timing report
So should I select XMP-UEI or what? It's for 6131.

I suspect for that one zero this instruction applies: "For XMP-1/2 commands, enter the OBC in the OBC-1 column and enter the OBC-2 in the OBC-2 column."

I'll be grateful for some help and easy to understand explanation of this thing. Thanks in advance.

Edited: added "extender" into the thread title

[The Robman]

The official UEI executor for XMP uses 2 variable bytes, but all of the upgrades that we've seen have one or the other of those bytes always set to zero. So, given that most people are going to need a protocol upgrade anyway, we made this parm driven. XMP-1 implies that the first of the two bytes holds the OBC and XMP-2 implies that the other one holds it.

The reason that the ZERO button decoded as XMP-1/2 is because the OBC is zero, therefore DecodeIR doesn't know which byte holds the OBC. So, don't use this as a reason to abandon XMP-1.

We have recently found a problem with the home made XMP executor, so try using the version posted here:
https://www.hifi-remote.com/forums/viewt ... 9915#p89915

[vickyg2003]

I hate to ask this Elizabeth, but do you have the latest and greatest version of KM? I think it was KM 9.19 had the XMP OBC area's backwards.

it says if even one decode is not XMP-1 use UEI and not JP1.

XMP is a hexadecimal code, instead of the binary codes we are used to. So there are 16 distinct timing pairs instead of two.

There are 2 bytes in the signal where the data could be


The OBC is one byte. If its in the first byte, its OBC1, if its in the second byte, its OBC2...

The reason that 0 comes out as XMP1/2 is because both the areas where the OBC could be are zeros, so that key can't be determined. 0 is both XMP1 and XMP2. So the other codes will be used to determine kind of jp1 code it is.

99 00 would be OBC-1
00 99 would be OBC-2
00 00 what is that? OBC1/2

HTH,

[The Robman]

I have updated the XMP code in KM 9.21 (beta):
https://www.hifi-remote.com/forums/dload ... le_id=8764

[vickyg2003]

Rob, the XMP fix was in KM 9.20. What did you change in Beta 9.21?

Edit, I just looked at the next post, and I see you fixed the hold forever problem.

[ElizabethD]

Vicky, I think he changed Yamaha.

Rob, Thanks so much for a clear explanation. I messed up before when I tried my upgrade in IRscope. Having seen correct OBCs, I failed to notice that it (KM9.19) was putting out XMP-2

Vicky, yes, yes, I was obsolete, KM 9.19.

So at this point there's a tiny bit of hope. For instance in CBL mode, 1 2 did go to ch.12, but then ch- didn't take it down one. And then 1 2 did 0 0 0. I can't figure any of it out, but there's chance the 6131 I used was KM9.20 - however that one did put out XMP-1.

I need to make sure 9.21 was used (getting confused here which remote is where).

Finally, in KM setup sheet is a "Final toggle" parameter, it's set to zero. How can I tell what it should be?

[vickyg2003]

Vicky, I think he changed Yamaha.

He also fixed the XMP. In KM 9.20, the register used to keep track of the repeats was being clobbered by some remotes, going into an infinite loop when you pressed a key.

Vicky, yes, yes, I was obsolete, KM 9.19.

tsk tsk

[The Robman]

The Yamaha thing was the main reason that I created 9.21, but I then made a second change to it to allow for the executor problem that was identified earlier.

[ElizabethD]

Update:
With one exception, the XMP executor from KM9.21 works well , and, unlike the OEM remote, it doesn't lockup the Comcast box, I don't know why. Thanks Rob, Mike, Vicky

6131ext1 problem - repeats.
While everything is OK from the keyboard, as is often the case, macros fail.
(1) NEC2 doesn't send repeat, so decodes as NEC. I can probably handle that one myself. NEC2 sends identical frames, so maybe I can change in PB ??
(2) XMP-1 doesn't send repeat. IRscope says "Incomplete signal start frame with no following frame"
I haven't tested macros on the real equipment yet. Perhaps it'll work as is. But any suggestions will be welcome.

IRscope/Widget ICT file in diagnosis:
https://www.hifi-remote.com/forums/dload ... le_id=8834

[The Robman]

Regarding NEC, that's just the way it works.

Regarding XMP, we may need to set a minimum number of repeats, so that when it's called from a macro (ie, R0D=2) we increase R0D to the minimum.

[ElizabethD]

With PB, I tried playing with R0D. It repeated a single button. But when I tried sending, in a macro the same thing, such as "22" it repeated but did not see two distinct codes, instead it said start frame with 7 repeats.

Then I tried harder to locate a place in code where the loops for repeats might be. In one version it repeated. Forever . Not what I had in mind.

So then I went back to the original version from KM9.21 and tried sending "22" - it appears that the 9.21 protocol has a problem with, say, channel 22. Because I got start frame with one copy and description "2 frames including distinctive start frame. Incomplete signal: expected end frame missing." so it got seen as a repeat of one of the twos.

[The Robman]

I wasn't expecting you to try messing with it yourself, so I didn't give more detailed instructions. The XMP executor is not a simple one, so while you can test that R0D is equal to 2 in order to determine that you're in a macro, making it repeat is not as simple as increasing R0D.

I would need to look at the executor itself to see the best way to approach this.

Don't use the JP1 version of XMP from any earlier versions of KM because those versions have known problems.

[vickyg2003]

22 isn't being seen as two keys because the off-time between the two keys isn't long enough. When you need to send 2 of the same key in a row, in a macro, you'll need to add a pause between them.

[The Robman]

I wasn't thinking about the fact that this is running in an extender. Do we know if the extender is setting R0D to 2 before it calls the executors? That is what happens in an un-extended remote.

Liz, could you try running the macros in the 6131 without the extender to verify if they work, as that will tell us whether it's the executor or the extender that needs to be fixed.

[ElizabethD]

Rob,
I experimented a little, see ICT file
https://www.hifi-remote.com/forums/dload ... le_id=8835
In it you'll see:
6131 standard, Sony12 was just a sanity check for me since I don't know how to do unestended 6131.
6131 standard, unextended works fine. Distinct signal rows for macro sequence 1221.
8910 extender, not ok, similar but not identical structure to 6131 extender. 8910 standard - not tested, I suspect will be fine
6131 extender, not ok, as described above.