Itch1: Spell weaving
thseiler at gmail.com
Wed Jan 24 17:15:18 CET 2007
I like your idea of spell weaving very much. Unfortunately...
> Latest word seems to be that Neo1973 will be single touch only and
> is hardware limitation.
...which is sad. I suppose the neo1973 is using a resistive
Therefore we can't hack the existing touch-screen to be multi-touchable.
However, I don't give up easily. I have seen that cypress produces a
of mixed signal MCUs (http://de.wikipedia.org/wiki/PSoC). They have
on-chip that is needed to build a capacitive touch controller. they
so expensive and the assembler / IDE is free (as in beer). And the
not so bad: apple used a PSOC chip for the clickwheel(tm) in the ipod
By going the capacitive road, it should be possible to have
multitouch as long as
the two touchpoints are not to close together. (this is basically how
touchpads for notebooks are build) By locking at the size we will
to split the display into upper and lower half and have two
So in order to hack this up, we would need:
- Someone who can sputter indium-thin-oxide onto a glass-substrate
Alternatively we might use an old resistive touch-screen for first
- Someone who can etch a pattern into this.
There we need someone with knowledge in chemistry .
(the pattern we need can be seen on one of the pictures in the
PSOC wikipedia article)
- Oh, and we would need solder points inside the Neo1973 (SPI /
uart / gpio) to
connect an alien MCU like the Cypress PSOC.
- kernel level device driver that emulates the interface of the old
- A new device to access the multi touch information.
- X pointer abstraction ? Dont know nothing about X.
- Some gesture detection ? Dont know nothing about markov.
So is there anyone on this list interested in building such a
Anyone with experience in working with Indium-Thin-Oxide or other
conductors ? Anyone who knows how the x pointer stuff works ? Or how
a gesture detection algo ?
This would really be fun !
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