marlin/buildroot/bin/pins_set

#!/usr/bin/env bash

IFS='/' read -r -a PINPATH <<< "$1"
DIR=${PINPATH[0]}
NAM=${PINPATH[1]}
PIN=$2
VAL=$3

SED=$(which gsed || which sed)
eval "${SED} -E -i 's/(\/\/)?(#define +${PIN}\b).*$/\2 ${VAL}/g' Marlin/src/pins/$DIR/pins_${NAM}.h"