Remote Code Protocol

[claydubois(at)bellsouth.net]

I noticed a while back Joe posted the command code for the remote.  I have a project I am working on where I use and embedded controller board to act as the remote.  However, there are numerous IR protocols out there for sending remote signals.  Which protocol does the Recorder use?  Is there a datasheet on the IR transmitter chip available where I can look up this protocol?  Thanks.

[Ex-Navy]

You can find them at www.olson-engineering.com under the Neuros button.

quote:Originally posted by claydubois(at)bellsouth.net

I noticed a while back Joe posted the command code for the remote.  I have a project I am working on where I use and embedded controller board to act as the remote.  However, there are numerous IR protocols out there for sending remote signals.  Which protocol does the Recorder use?  Is there a datasheet on the IR transmitter chip available where I can look up this protocol?  Thanks.

Ex-Navy

[claydubois(at)bellsouth.net]

Please please please help me Neuros.  Anyway you can tell me exactly what IR protocol is used?  Sony RC5, NEC, Sony RC7, etc....??  This would greatly help me in developing my remote controller board which will turn on and off the record, etc.....   I have tried to look at the IR transmitter chip used in the remote, but cannot find any information on it anywhere.  I got the remote codes, but they are pretty much useless without knowing the protocol format.     Once I get the coder written for my AVR controller board which will remote control the recorder 2, I would be more than happy to share it with everyone. This would allow people to build their own remote control for the neuros with a micro without having to hack into the internal wiring of the remote. Thanks. !!!

[claydubois(at)bellsouth.net]

OK, seems that the IR encoder/tranmitter chip used is the JA6221.  Cant seem to find a datasheet on it.  Anyone know where one can be found?

[claydubois(at)bellsouth.net]

Ahhh, found it.. well, I found a datasheet for a cross reference for the JA6221, the Holtek HT6221.  Seems to be the exact same chip.  So now I can either use the HT6221 in my design, or try to figure out the protocol and replicate it with my AVR micro board.  Once I get it going, I will give yall some more information on how to create your own custom controller protocol to control the recorder.

[Ex-Navy]

The remote uses a 38khz carrier, NEC protocol, 9ms AGC, then 4.5ms gap, then 16 bit address, 8 bits data, then 8 bits data inverted.


 

quote:Originally posted by claydubois(at)bellsouth.net

Ahhh, found it.. well, I found a datasheet for a cross reference for the JA6221, the Holtek HT6221.  Seems to be the exact same chip.  So now I can either use the HT6221 in my design, or try to figure out the protocol and replicate it with my AVR micro board.  Once I get it going, I will give yall some more information on how to create your own custom controller protocol to control the recorder.

Ex-Navy

[claydubois(at)bellsouth.net]

Ah, so it is the NEC protocol?  Great!  I found the Holtek HT6221 datasheet which shows the timing, but it did not mention it was nec protocol.  I was planning on taking the most simple route and using the IR chip used in the remote (or a cross) on my controller baord, which would definatley make it easy as far as writing code.  However, I cannot seem to be able to purchase any of these IR encoders anywhere.  Sooooo, it looks like I am back at having to emulate the IR protocol within my AVR controller board.  Boy, sure was hoping I could just take the simple route, but it does not appear that way now.  Thanks Ex-Navy for the info on the protocol.  []

[Ex-Navy]

Here is where you can get the complete guide to the protocol using
a NEC UPD6221 encoder. NEC explains the protocol better then the
Holtek data sheets.
I also discovered that the actual manufacturer of the NR2 remote is in Taiwan. I now have the contact info for them.
I thought it would be cool to see if they sell a developer board for
the HT6221 chip.

Here is the NEC data sheet link:

http://www.datasheetcatalog.com/datasheets_pdf/U/P/D/6/UPD6122.shtml

quote:Originally posted by claydubois(at)bellsouth.net

Ah, so it is the NEC protocol?  Great!  I found the Holtek HT6221 datasheet which shows the timing, but it did not mention it was nec protocol.  I was planning on taking the most simple route and using the IR chip used in the remote (or a cross) on my controller baord, which would definatley make it easy as far as writing code.  However, I cannot seem to be able to purchase any of these IR encoders anywhere.  Sooooo, it looks like I am back at having to emulate the IR protocol within my AVR controller board.  Boy, sure was hoping I could just take the simple route, but it does not appear that way now.  Thanks Ex-Navy for the info on the protocol.  []

Ex-Navy

[Ex-Navy]

Clay,
I was thinking, why do we have to drive an IR LED.
Why not insert a circuit after the IR demod on the recorder?
Just emulating the key codes for the remote at the data rate required
and signal limits required should work......
Programming an AVR or PIC to sequence keypad presses.
Could program it to even select resolution etc.

quote:Originally posted by claydubois(at)bellsouth.net

Ah, so it is the NEC protocol?  Great!  I found the Holtek HT6221 datasheet which shows the timing, but it did not mention it was nec protocol.  I was planning on taking the most simple route and using the IR chip used in the remote (or a cross) on my controller baord, which would definatley make it easy as far as writing code.  However, I cannot seem to be able to purchase any of these IR encoders anywhere.  Sooooo, it looks like I am back at having to emulate the IR protocol within my AVR controller board.  Boy, sure was hoping I could just take the simple route, but it does not appear that way now.  Thanks Ex-Navy for the info on the protocol.  []

Ex-Navy