#!/bin/bash


#  knop - Bekijk een pin van de Pi header en sluit de Pi af
#           wanneer deze lang genoeg ingedrukt wordt
#
#  Versie 1.00
#
#  Copyright (C) 2017, Lieven, ON7LDS. All rights reserved
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program 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 General Public License for more details.
#

# basis : http://crompton.com/hamradio/RPi2_halt_switch/


# hiervoor is de wiringpi bibliotheek nodig, doe:
# apt-get install wiringpi


#--------------------------------------------------
# Welke pin gebruiken ?
# Kijk bij wiringpi als je een andere wil gebruiken
PIN=29
#--------------------------------------------------


ps ax | grep "[g]pio wfi $PIN falling" > /dev/null
if [ $? -eq 0 ]; then
  echo "Process is already running."
  exit 0
fi

# Hoe lang toest ingedrukt houden (seconden)
HOLDTIME=5

gpio mode $PIN in
gpio mode $PIN up
TIME1=1

while [ 1=1 ]
echo "Toets monitoren ..."
    echo timer > /sys/class/leds/led1/trigger
    echo 100  > /sys/class/leds/led1/delay_on
    echo 1900 > /sys/class/leds/led1/delay_off
   gpio wfi $PIN falling
   do
echo "Gedrukt ..."
   while [ `gpio read $PIN` -eq "0" ];
   do
echo $TIME1 $STATE
      echo 0 > /sys/class/leds/led1/brightness
      sleep 0.5
      echo 1 > /sys/class/leds/led1/brightness
      sleep 0.5
      let TIME1+=1
      if [ $TIME1 -gt $HOLDTIME ]; then
         break 3;
      fi
   done
   TIME1=1
   continue
done

echo timer > /sys/class/leds/led1/trigger
echo 25 > /sys/class/leds/led1/delay_on
echo 25 > /sys/class/leds/led1/delay_off

/sbin/halt
#/sbin/shutdown -h now