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.

Thanks!

--
Rick
rmann@latencyzero.com.sansspam

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