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Topic:
Makehex & Denon AVR-2808 IR documentation
This thread has 2 replies. Displaying all posts.
Post 1 made on Wednesday October 24, 2007 at 15:54
yngodt
Long Time Member
Joined:
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October 2005
10
So I'm using Makehex to generate Denon codes (2808 in particular) according to Denon's IR documentation. I gather that C1-C5 is the device number, and C6-C11 is the function number.

But what does the C12,C13 "extension bit" mean? For instance, there are two sets of commands listed as device 8, one using 11 for C12,C13 and the other using 10 for C12,C13. How would I alter the denon.irp to account for this?
Post 2 made on Wednesday October 24, 2007 at 16:08
johnsfine
IR Expert
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Posts:
September 2002
5,159
MakeHex (and all of my other IR tools), for Sharp and Denon protocols, considers all the bits C6 through C13 together as the function number.

So if you don't already have the conversion of C6-C11 from backwards binary to decimal, you could take all eight bits, reverse their sequence, then convert from binary to decimal.

But I expect you already have the conversion from C6-C11. So if C12,C13 is 11, just add 192 to the previously converted value. If C12,C133 is 10, just add 64 to that previous value.

Do not change the .irp file for C12,C13. The irp file already specifies the full set of function numbers 0 to 255.

On October 24, 2007 at 15:54, yngodt said...
there are two sets of commands listed as device 8,

I don't have the 2808 documentation and I can't read my copy of the 2807 documentation (lost the strange font it needs and can't get Adobe to get it back).

But I'm pretty sure you want device 2, not device 8.

Denon writes binary backwards (right to left). So "0 1 0 0 0" is 2, not 8.

Denon Device 8 is for DVDs and CDs.

I think the power toggle for the AVR models is device 2, function 193 or 226 (depending on which AVR model). Hopefully that example will help you understand Denon's backwards binary.

Last edited by johnsfine on October 24, 2007 16:21.
OP | Post 3 made on Wednesday October 24, 2007 at 16:27
yngodt
Long Time Member
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Posts:
October 2005
10
Ah, it all makes sense now. Thanks!


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