Home-Brew IR port. Was - Please Ignore RS232 message. The
subject should read IrDA port... Sorry
Werner Almesberger
werner at openmoko.org
Fri May 11 18:10:07 CEST 2007
Alan Ide wrote:
> Any suggestions, comments, or hate mail are welcome.
Just a few data points:
- IR most remotes use a signal with a 35 kHz or 38 kHz carrier, so
you would probably want to use a PWM for this
- alas, all the PWM outputs are taken for other things in GTA01Bv4:
TOUT0: BACKLIGHT_LCM
TOUT1: GPS_PWRON
TOUT2: nSD_ON
TOUT3: VIBRATOR_ON
- you probably want your remote to be "learning", so you also need
an input (this also could be connected to the PC, and then you'd
just copy the codes to the Neo). For this, you probably want a
sensor with a build-in 35 kHz or 38 kHz bandpass filter. (E.g.,
a few years ago, I used the IRM8601S. But there are more recent
and more compact choices as well.)
My circuit from back then (using a PIC microcontroller and doing
everything in software) is here:
http://www.almesberger.net/misc/irr/
- Werner
--
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/ Werner Almesberger, Buenos Aires, Argentina werner at almesberger.net /
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