> Hi. I have a PIC-based device that is designed to learn IR codes
> so that it
> can be controlled.
>
> The device has about a dozen functions that should be controllable from an
> IR remote. However, it doesn't have its own remote control.
> Instead, I want
> to be able to learn an arbitrary remote IR code from an arbitrary remote
> controller, and then respond to that code whenever I see it (by "I" I mean
> the device).
>
> I've looked through the PICList FAQ, and found some helpful information
> about Sony and Philips IR codes, and IR in general.
>
> Unfortunately, none of it really helps. It seems that all learning remotes
> just regurgitate a learned pulse train; easy enough. What I need to do is
> learn a dozen pulse trains, then every time my IR module receives a pulse
> train, I need to reliably match it against one of the dozen I have stored.
> If it doesn't match any of those, then I just ignore it. This
> strikes me as
> memory and processor-intensive, and possibly beyond the PIC's (16F877)
> capabilities (my PIC is also scanning for front-panel buttons and
> watching a
> serial port).
>
> A slightly different approach would be to figure out how to decode pulse
> trains from different remotes into their logical values (address, data,
> etc). Then, looking up the matching code in a table is easy (easier than
> matching a table of pulse train descriptions, I think).
>
> Surely there is some more clever technique out there that someone has come
> across. If you know of anything, or have any suggestions, please let me
> know.

        While I'm no help in how to do it I will say that it is most certainly
possible to do it with a 16F877. Search the net for UIR, it's a remote
control receiver for a computer, built out of a 16F84 (and even a 12C series
IIRC). TTYL

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