True, yet: for the Keydler, each software revision as we improve it
would then require another round trip (or at least a swap!) for each PIC
or Atmel AVR chip, that's why Tim & I went with a more self-sufficient
approach <G> The Keydler's design has somewhat mutated (We should, in
time, be able to emulate any of about 12 different keyboards - perhaps
as easily as shut power off, swap keyheads, power up & we figure out
which keyhead you've plugged in <G>) - we're starting with the Bat and
Twiddler; we anticipate future software development, obviously! <G>
Keyheads from the Bat to "something completely different" should be
quite do-able, with some work. Changing to the AVR parts has slowed us
down. It'll speed up the development cycle though, a lot, the PC board
will just plug into a handy LPT or Comm port, for programming. We can
use help, or share info with others, whatever works <G>
There's NO "wrong" approach, here, especially with different goals &
routes to solve different problems. (I've made some - IMO - good
suggestions for other projects, more diversity is great <G>)
I have EPRom erasers & burners, 5 different PIC burners, and AVR
burners here, and can help if someone's in the Kent, WA area & needs
help <G>
Mark
Omar Jenkins wrote:
>
> Once someone has nailed down a cricuit diagram that works, and a program
> to put into the EEPROM that also works, it wouldn't be too much of a
> bother to get the person who developed the clone to burn EEPROMs for
> people who were building them based on the developers design. All the
> builder would do is send the EEPROM chip to the developer(it would take
> nothing more than 33 cents in postage), the developer would burn it(would
> take about 5 minutes for the whole process, then mail it back. I'm
> nowhere near the stage of getting mine finished, but would be willing to
> burn BS2 chips once I am.
>
> On Mon, 31 May 1999, Mark Willis wrote:
>
> > For those with an
> > EPRom eraser & programmer, EProm based parts are nice - but for most
> > users, the cost of an EPRom eraser plus a socket for the PIC plus a PIC
> > Programmer, means the Twiddler CLONE costs them more than the Twiddler,
> > this is not a good thing <G> It's OK for the developers, not workable
> > for the end users! The Atmel AT90S8515 comes in TQFP packaging, or in
> > 40-pin DIP for prototyping. And costs $6ish apiece, less in quantity.
> > $49 for the STK200 programmer, to get you started. Also, the program
> > can easily be in C instead of Assembler, as you're running 4 times the
> > CPU speed for the same clock rate, it's just a good answer.
>
> {Omar Jenkins class of 1998/2002|"The more you study, the more you know, }
> {Blair HS Graduate & UMCP Frosh | the more you know, the more you forget, }
> {<
> | the more you forget, the less you know."}
> {<
> | ??So Why Study?? }
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