[LAU] GPIO to alsa

[Peter P.]

* Raphaël Mouneyres <rmouneyres at gmail.com> [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