AVR-Chat

Aren't you using the common 38Khz receiver that has a built-in
demodulator?  That will automatically produce the slow command
 data that can then be easily captured by the micro, by sampling or
edge interrupts.


> Hi again,
>
> My objective is to read a Infrared command signal (Airconditioner
> remote command), that is modulated in 38Khz, to later reproduze the
> commands, i've past the signal to TTL and the question is, what is the
> best way to read that signal?
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> I'm using ATMega128 and a crystal of 15.3Mhz to be 100% with USART.
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> External Interrupts?
> Timer/Counter? 8bit? 16bit? Counter1? Counter2?
> I will need to read at least at 76Khz (2x38Khz), right?
> My first idea is to use a internal interrupt that occurs at a rate
> bigger 76Khz, and see if the signal is at 1 or 0, is this the best?
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> Yahoo! Groups Links
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