Teensy + PCF8575 programming help!

Hi,i’m french i’m trying to make a midi controller with 16arcade buttons. Like a midifighter: https://store.djtechtools.com/products/midi-fighter-spectra

I’ve build the box and the breakboard with a multiplexer, the pcf8575. I understand nothing in coding and don’t want to loose my mind (i have try but don’t understand how it works… :sweat_smile:)

Can someone write the code for me? :smiley: :grin: or just the begining,I don’t understand how pilot the multiplexer…



or just the begining

first you need a link to the datasheet ...

If you want someone to write the code for you, you belong in Gigs and Collaboration.