[Noisebridge-discuss] computer interfacing

[Michael Shiloh]

this is a really interesting thread. sufficient interest in a wiki page?


On 11/13/2010 03:15 PM, Josh Myer wrote:
> If you're down for even more microcontroller hacking, the ATTiny series
> can be convinced to bitbang USB, including HID:
> http://www.xs4all.nl/~dicks/avr/usbtiny/
>
> <http://www.xs4all.nl/~dicks/avr/usbtiny/>You'll probably want to use an
> ATTiny2313 if you want more than 3 inputs without doing dirty ADC, mux,
> or shift register tricks.
> --
> /jbm
>
> On Sat, Nov 13, 2010 at 2:18 PM, Jonathan Foote <jtfoote at ieee.org
> <mailto:jtfoote at ieee.org>> wrote:
>
>     One more option if you are down with some microcontroller hacking:
>
>     Get a AVR usb dev board (AT90USBKEY2, $30 at the usual places), and
>     with the LUFA open-source USB stack, you can make the board look like
>     a USB HID keyboard (or mouse, or...) such that any input pin change
>     can generate any arbitrary key events you want. No drivers, no hassle,
>     should wake up a sleeping box just like a regular USB keyboard.
>
>     On Sat, Nov 13, 2010 at 11:38 AM,
>     <travis+ml-noisebridge at subspacefield.org
>     <mailto:travis%2Bml-noisebridge at subspacefield.org>> wrote:
>      > So, I've often wondered what the best way to control a computer with
>      > simple NO/NC inputs would be.
>      >
>      > I used to rig buttons and such to the parallel port.
>      >
>      > But computers don't have parallel ports much any more.
>      >
>      > I also used to hook them to RS-232 ports.
>      >
>      > But those are going away too.
>      >
>      > So what's left?
>      >
>      > Last I heard, several years ago, the USB drivers were still somewhat
>      > flaky.  Is it better now?
>      >
>      > Also, HOW exactly do I hook up to USB?  With parallel it was just
>     some
>      > passive circuits.  (Perhaps the answer here is "use Arduino")
>      >
>      > And, finally, how do I avoid polling loops?  (Perhaps again the
>      > answer is "use arduino").
>      >
>      > And, for low-power scenarios, is there any obvious way to make a
>      > system that waits in a very low power mode, then wakes up on certain
>      > events?
>      >
>      > Things that come to mind are rigging something to soft power-on (can
>      > this be done on a laptop?) or Wake-on-LAN (but that requires
>     something
>      > capable of sending custom ethernet packets, which itself might
>     consume
>      > a fair amount of power).
>      > --
>      > Good code works on most inputs; correct code works on all inputs.
>      > My emails do not have attachments; it's a digital signature that
>     your mail
>      > program doesn't understand. | http://www.subspacefield.org/~travis/
>      > If you are a spammer, please email john at subspacefield.org
>     <mailto:john at subspacefield.org> to get blacklisted.
>      >
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>      >
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>
>
>
> --
> Josh Myer 650.248.3796
> josh at joshisanerd.com <mailto:josh at joshisanerd.com>
>
>
>
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-- 
Michael Shiloh
KA6RCQ
www.teachmetomake.com
teachmetomake.wordpress.com