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Original thread:
Post 8 made on Sunday December 5, 2010 at 12:42
3FG
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August 2009
1,857
Firstly, you should take whatever John Fine writes to the bank. He says the LIRC file is Sony20, device 26.19, and it is.
I don't know how to read LIRC files, but I can find the various devices and function codes in the file.

The format of Sony20 is can be expressed in IRP notation (invented by John Fine) is {40k,600}<1,-1|2,-1>(4,-1,F:7,D:5,S:8,^45m)+

So we can expect that the IR data is sent in the order 7 bits of function, 5 bits of device, and 8 bits of subdevice.

The LIRC files says post data is 0xC8. Of course it is tempting to think that means device 200, but in fact the bits are written in reverse order in LIRC compared to the Sony20 method. So
11001000 = 0xC8 = 200
00010011 = 0x13 = 19 (this is the subdevice)

Function Scan
1000111 01011 = 0x8EB
11010 1110001 = 0x1A and 0x71 = 26 and 113

There is a XDR-F1HD upgrade file for JP1 remotes which gives:
09
10
21
32
43
54
65
76
87
98
preset +61
preset -62
dimmer75
tune/select +115
tune/select -116
power21
sleep96
enter48
display73
band111
HD scan112
scan113
menu72

Taken all together, I suspect the posted info that the IR protocol is Sony15, device 200 is simply incorrect, and the presumed error is caused by reading 0xC8 frontwards instead of backwards.


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