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Topic:
Pioneer (DVD) Code Structure???
This thread has 3 replies. Displaying all posts.
Post 1 made on Thursday November 15, 2007 at 14:20
tgrugett
Select Member
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August 2004
1,850
I am curious as to the nature of the IR codes used for the BDP94HD DVD player (and presumeably others). I do not use many Pioneer products outside of the TVs which I tend to use 232 for.

The Pioneer documentation lists "Command 1" and "Command 2" codes for each function. For example:

Power On:
Command 1 {A1 81}
Command 2 {AF BA}

I used IRTool to look at the code information for each function and it returns information for two codes which correspond to the hexadecimal documentation.

Command 1 {d161 f129}
Command 2 {d175 f186}

Are the two commands required for each function? Are they two different commands for assignable control? Is one a press and the other a release? I searched for info on this but came up empty handed.
Post 2 made on Thursday November 15, 2007 at 14:48
johnsfine
IR Expert
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September 2002
5,159
On November 15, 2007 at 14:20, tgrugett said...
Are the two commands required for each function?

Yes. (Though I think it's clearer to describe as "two signals for each command").

Are they
two different commands for assignable control?

I don't know what you mean, but I think the answer is no.

Is one
a press and the other a release?

No.

It uses two IR signals to communicate the one command. I don't know why Pioneer chose to design it that way.

You could use such a design to get support for more than 256 different commands in each device. One or more of the single part signals are reserved for use only as the prefix of two part commands, each of which could introduce up to 256 two part commands.

But, so far as I know, Pioneer never actually has more than 256 commands per device, so they should have been able to pack the whole command set into single part commands. They just chose not to.
Post 3 made on Thursday November 15, 2007 at 15:34
NSP01
Advanced Member
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Posts:
March 2005
834
I wish we would just use a single command for the code strucure for every component. It would be make it easier for me to keep up with all of the products.
The best way I can describe it is that we create different command/code sets for every "device". Receivers, for instance, would be comprised of Input, Tuner, XM, Sirius, iPod, DSP's, and Multi-Zone, and more devices. There is a different command/code set for each.

Troy,
You do know that there are ccf and mxf files for the BDP-94HD on the same site that you got the IR Code lists - right?

John
They call me the "Thread Killer". Just watch!
OP | Post 4 made on Thursday November 15, 2007 at 22:58
tgrugett
Select Member
Joined:
Posts:
August 2004
1,850
Thank you John and John.

Yeah I know of the .ccf files. The codes I looked at were from a .ccf file from the site. I assumed that they are cleanly generated based on other posts of yours I have seen in the past. I just wanted to confirm what I was seeing and have it explained from two of the few sources I trust!


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