#!/bin/bash
# ENER314 interface script by TDGalea.
# galeatd@gmail.com
# tdgalea.co.uk

# GPIO pins
D0="/sys/class/gpio/gpio17/value"
D1="/sys/class/gpio/gpio22/value"
D2="/sys/class/gpio/gpio23/value"
D3="/sys/class/gpio/gpio27/value"
mod="/sys/class/gpio/gpio25/value"

if [ "$2" = "" ];then
 echo "Usage:"
 echo "       $0 [socket-id] [state]"
 echo "e.g. to turn socket 2 ON, issue the following command:"
 echo "$0 2 1"
 exit 9
fi

# Socket identification.
case ${1,,} in
   0) (echo "1">$D0;echo "1">$D1;echo "0">$D2);;
 all) (echo "1">$D0;echo "1">$D1;echo "0">$D2);;
   1) (echo "1">$D0;echo "1">$D1;echo "1">$D2);;
   a) (echo "1">$D0;echo "1">$D1;echo "1">$D2);;
   2) (echo "0">$D0;echo "1">$D1;echo "1">$D2);;
   b) (echo "0">$D0;echo "1">$D1;echo "1">$D2);;
   3) (echo "1">$D0;echo "0">$D1;echo "1">$D2);;
   c) (echo "1">$D0;echo "0">$D1;echo "1">$D2);;
   4) (echo "0">$D0;echo "0">$D1;echo "1">$D2);;
   d) (echo "0">$D0;echo "0">$D1;echo "1">$D2);;
esac

# State identification.
case ${2,,} in
     0) echo "0">$D3;;
     f) echo "0">$D3;;
 false) echo "0">$D3;;
   off) echo "0">$D3;;
     1) echo "1">$D3;;
     t) echo "1">$D3;;
  true) echo "1">$D3;;
    on) echo "1">$D3;;
esac

# Wait for encoder to catch up.
sleep 0.1

# Pulse modulator.
echo "1">$mod;sleep 0.1;echo "0">$mod

# Restore all pins.
echo "0">$D0
echo "0">$D1
echo "0">$D2
echo "0">$D3

# End
exit 0