[PD] Arduino+firmata - digital input (pull-up) - for Hans
Hans-Christoph Steiner
hans at eds.org
Fri Apr 27 02:14:06 CEST 2007
On Apr 26, 2007, at 9:45 AM, João Miguel Pais wrote:
> Hello Hans and list,
>
> we're in the workshop with Sukandar in Berlin, and something
> strange just
> happened. My arduino isn't the newest, it has with the ATMEGA8 chip
> (the
> one we got in Zürich some time ago). I've put the latest firmata
> into it,
> and the analogue stuff worked quite well.
>
>
> While doing some digital inputting (just simple switches) a few things
> happen:
>
> - the inputs/outputs don't match: if the switch is connected in the
> input
> 2, it comes out from 5 (the same to all other inputs, although I
> didn't
> mapped them). But consequently, if I switch the input 2 off, the
> output 5
> switches off.
> This doesn't happen on other participants who have the newest arduino
> board.
>
> - someone here mentioned that the arduino has its own pull-up
> resistors.
> but in the firmware they're switched off, and we found no
> possibility to
> switch it in the arduino-test patch. so we must build our own pull-up
> resistors in the circuit, outside.
> is it possible with this firmata to activate the pull-up resistor in
> arduino from the pd patch? if not, do you think you're going to
> implement
> it? or could you tell just quickly how enable it?
Hmm, I am still mostly working with the ATMEGA8 boards. I am unaware
of a way to disable or enable pull-up resistors in the ATMEGA8/
Arduino. If such is a thing is a possibility, I would happily add it
to the Firmata firmware.
Do you have any docs on how to do this? Have you tried the Arduino
forums?
.hc
>
>
> Thanks,
>
> João Miguel Pais
>
>
> --
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>
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