Pd-l2ork comes with I2s and gpio externals, including support for soft pwm on all pins. HTH
--
Ivica Ico Bukvic, D.M.A.
Associate Professor
Computer Music
ICAT Senior Fellow
Director -- DISIS, L2Ork
Virginia Tech
School of Performing Arts – 0141
Blacksburg, VA 24061
(540) 231-6139
ico@xxxxxx
www.performingarts.vt.edu
disis.icat.vt.edu
l2ork.icat.vt.edu
ico.bukvic.net
On Feb 28, 2016 8:49 AM, "Peter P." <peterparker@xxxxxxxxxxxx> wrote:
* Raphaël Mouneyres <rmouneyres@xxxxxxxxx> [2016-02-28 13:18]:
> Hello,
>
> Having some bare keyboards and raspberry-sortof boards, I'd be interested in connecting both of them without using a midi interface, but only the available GPIO pins available on the board. This is as well to save external components and as a programming exercise.
>
> After searching for information, nothing revelant was found, except a experimental python script to read gpio and using the mididings library to output messages.
>
> Is there a existing project which would scan rows/colums of a keyboard from the designated(configured) gpios, and throw midi message to an alsa midi port ?
Pure Data
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