How to use all available pins on Leonardo (atmega32U4)

gigawatts · July 12, 2019, 5:24pm

Here is an example of mapping / using many of those extra pins, including PD5

Workshop88/thotcon0x5/blob/master/libraries/pins_arduino.h

/*
  pins_arduino.h - Pin definition functions for Arduino
  Part of Arduino - http://www.arduino.cc/

  Copyright (c) 2007 David A. Mellis

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General
  Public License along with this library; if not, write to the
  Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  Boston, MA  02111-1307  USA

This file has been truncated. show original

See the readme in that repo for instructions on replacing your pins_arduino.h file with the one provided.

This, for example, maps PD5 to Digital Pin 30. I am using it successfully with the Lillypad Arduino USB bootloader (this badge uses an external 8 MHz crystal)

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How to use all available pins on Leonardo (atmega32U4)

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