retroidle

#!/bin/bash
# This script watches /proc/interrupts for incrementing pinctrl
# The gpio pinctrl interupts are used by retrogame
# Currently it sums all lines matching pinctrl.
# Change the awk pattern to only match specific pins
# Can be used with any interrupts. Just change the awk search pattern
# Run from rc.local. /usr/local/bin/retroidle &

# idle_max=number of seconds of no interupts before idle
idle_max=7200

idle_start()
{
        #Code to execute when idle
        #echo "IDLE START"
        #/usr/local/bin/idlestart

}

idle_end()
{
        #Code to execute when off idle
        #echo "IDLE DONE"
        #/usr/local/bin/idleend
}

idle_while()
{
        #Code to run while idling
        #Will run once a second
        #/usr/local/bin/ledblink
}

idlecount=0
idling=false

while true;do
        ints_last=$ints_now
        ints_now=`awk ' /pinctrl/{total+=$2} END {print total}' < /proc/interrupts`
        sleep 1

        if [ "$ints_last" == "$ints_now" ] ; then
                ((idlecount++))
        else
                if [ "$idling" == "true" ] ; then
                        idling=false
                        idlecount=0
                        idle_end
                fi
        fi

        if [ $idlecount -ge $idle_max ] ; then
                idlecount=$idle_max
                if [ "$idling" == "false" ] ; then
                        idling=true
                        idle_start
                else
                        idle_while
                fi
        fi

done