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Discussion Starter · #1 ·
The two codes below are from the Hitachi 2004/2005 IR code list. I'm trying to use this list to program my Palm remote, but can't because they are not in Pronto format.


Does anyone recognize these codes? Any idea how I can get them into Pronto format?



POWER ON 50AF 3EC1

POWER OFF 50AF 3FC0

CURSOR UP 50AF 708F

CURSOR DOWN 50AF 718E

CURSOR LEFT 50AF 738C

CURSOR RIGHT 50AF 728D

SELECT 50AF 2ED1
 

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Discussion Starter · #3 ·
I do think I've figured out enough to convert these code...

Code:
Code:
Discreet Power On = 50AF 
Pronto code = 0000 006d 0022 0002 0154 00ab 0016 0015 0016 0015 0016 0015 0016 0015 0016 003f 0016 0015 0016 003f 0016 0015 0016 003f 0016 003f 0016 003f 0016 003f 0016 0015 0016 003f 0016 0015 0016 003f 0016 0015 0016 003f 0016 003f 0016 003f 0016 003f 0016 003f 0016 0015 0016 0015 0016 003f 0016 0015 0016 0015 0016 0015 0016 0015 0016 0015 0016 003f 0016 003f 0016 05e8 0154 0055 0016 0e3f

Breaking down the pronto code gives me this:

0000 = Start is always 0000
006d = 38Khz. 006d hex =109 decimal (38,028 = 1000000/(109*.241246))
0022 = 0022 hex = 34 dec. 34 Single burst pairs (bits)
0002 = 2 Repeat burst pairs (bits)
0154 00ab = Lead in for Single burst data
 8940 microseconds of "1", then 4496 microseconds of "0" 0154 hex = 340 decimal. 340 cycles at 38Khz is 8940 microseconds long.
 0016 0015 0016 0015 0016 0015 0016 0015 0016 003f 0016 0015 0016 003f 0016 0015 0016 003f 0016 003f 0016 003f 0016 003f 0016 0015 0016 003f 0016 0015 0016 003f 0016 0015 0016 003f 0016 003f 0016 003f 0016 003f 0016 003f 0016 0015 0016 0015 0016 003f 0016 0015 0016 0015 0016 0015 0016 0015 0016 0015 0016 003f 0016 003f 
  = 0 0 0 0 1 0 1 0  1 1 1 1 0 1 0 1  0 1 1 1 1 1 0 0  1 0 0 0 0 0 1 1 (0016 0015=0 & 0016 003f=1)
0016 05e8 = Lead out
 = 578 microseconds of "1", then 39760 microseconds of "0"

0154 0055 = Lead in for Repeat burst data
 = 8940 microseconds of "1", then 2235 microseconds of "0"
 0016 0e3f
  = 1

You'll notice that the data for the single burst pair is the same as the binary for our short command, except that each byte (8 bits) is reversed:

01010000 10101111  00111110 11000001
00001010 11110101  01111100 10000011



I hope this helps someone.


I've found a number of discreet codes on the Hitachi 2004/2005 list that are mislabelled. ie The code for 16:9 ratio really turns on DAY mode.


Once I have a complete list I'll be sure to post it.
 

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hi, now i understand the format of pronto hex code.., but i have query

I am working on universal remote , now I have to convert the pronto hex code to .wave file and i have read the file format of the wave from this link https://ccrma.stanford.edu/courses/422/projects/WaveFormat/

I have been unable to convert one pronto code to .wav file for any device I have, although I know my IR transmitter works as after hours of looking for LG .wav files I found a file called service-ok-ok.wav from this link http://chomikuj.pl/adam18021964/LG+450USB+Sowty/LG_DTV/Lg-Service-menu-All*2c/LED-Wav . This file allows me to get into the service menu of my TV.... but this is all I can do as I do not know how to create a wave file.

my transmitter is just 2 IR LEDs on a 3.5mm audio jack which I am going to plug into my phone's 3.5 mm jack and then i play the wave file to send the signal to TV.here is my transmitter device http://rtfms.com/episode-4-turn-your-iphoneandroid-mac-pc-player-etc-into-a-universal-remote.htm#source , you can see the picture of 2 IR LEDs on a 3.5mm audio jack.
 
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