Am Freitag, 28. Juli 2006 03:20 schrieb Stefan Eitel:
> Hi,
>
> I know this has been discussed before (in November 05), but I wanted to
> point the developers to some references.
> This is not new stuff, but someone has managed to use the GPIO ports on a
> Linksys WRT54G to access SD Cards, see http://kiel.kool.dk/.
> Basically he connected six of the GPIO ports to an SD Card Slot and wrote a
> kernel driver for accessing the device (http://kiel.kool.dk/mmc.c).
>
> The GPIO ports deliver 3.3v. I do not know much about 1-Wire (yet), but I
> recall it could operate between 2.8 and 6.somewhat volts. Maybe 3.3v would
> suffice - maybe not - I don't know. If no, possibly some more electronics
> would be needed to make it work, which would make the idea (a little) less
> attractive.
>
Hmm. I think the WRT54G board may have some support for I2C through these GPIO
pins, too. It's pretty common for embedded boards to have an I2C hardware
(shift register) at hand. Does anyone know certainly? Otherwise I will
investigate on this.
As we have I2C<->Onewire support in OWFS now, this could be a solution which
avoids bitbanging (sloooooooow).
Kind regards
Jan
--
You cannot achieve the impossible without attempting the absurd.
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