#!/bin/bash

if [ $# -le 1 ]
        then
                echo "Error - Require Current Density (A) and time to run (s)"
                echo "electroplate.sh A s"
                exit 1
fi


currentdensity=$1 runtime=$2

echo "Starting Electroplating $currentdensity for $runtime"

# calculate the currents - still need to calculated the PWM --> Votlage
# -> Current settings

let forward_current_duty_percent=currentdensity
let reverse_current_duty_percent=forward_current_duty_percent*2

#setup PWM settings
#       -- ehrpwm.1:0 ( yellow Forward P Channel )
  echo 0 > /sys/class/pwm/ehrpwm.1:0/duty_percent
        echo 500 > /sys/class/pwm/ehrpwm.1:0/period_freq
        echo 50 > /sys/class/pwm/ehrpwm.1:0/duty_percent
        echo 0 > /sys/class/pwm/ehrpwm.1:0/polarity
        echo 0 > /sys/class/pwm/ehrpwm.1:0/run

#       -- ehrpwm.1:1 ( red Reverse P Channel )

        echo 0 > /sys/class/pwm/ehrpwm.1:1/duty_percent
        echo 500 > /sys/class/pwm/ehrpwm.1:1/period_freq
        echo 50 > /sys/class/pwm/ehrpwm.1:1/duty_percent
        echo 0 > /sys/class/pwm/ehrpwm.1:1/polarity
        echo 0 > /sys/class/pwm/ehrpwm.1:1/run

#       -- ehrpwm.2:0 ( brown forward n linear Channel )

        echo 0 > /sys/class/pwm/ehrpwm.2:0/duty_percent
        echo 80000 > /sys/class/pwm/ehrpwm.2:0/period_freq
        echo $forward_current_duty_percent > /sys/class/pwm/ehrpwm.2:0/duty_perc
ent
        echo 0 > /sys/class/pwm/ehrpwm.2:0/run

#       -- ehrpwm.2:1 ( green reverse n linear Channel )

        echo 0 > /sys/class/pwm/ehrpwm.2:1/duty_percent
        echo 80000 > /sys/class/pwm/ehrpwm.2:1/period_freq
        echo $reverse_current_duty_percent > /sys/class/pwm/ehrpwm.2:1/duty_perc
ent
        echo 0 > /sys/class/pwm/ehrpwm.2:1/run


timer=$2

for (( i = 1; i <= timer; i++ )) ### Outer for loop ###
do
    for (( j = 1 ; j <= 25; j++ )) ### Inner for loop ###
         do
                        echo 1 > /sys/class/pwm/ehrpwm.1:0/run
                        echo 1 > /sys/class/pwm/ehrpwm.2:1/run
                        sleep 0.012
                        echo 0 > /sys/class/pwm/ehrpwm.1:0/run
                        echo 0 > /sys/class/pwm/ehrpwm.2:1/run

                        echo 1 > /sys/class/pwm/ehrpwm.1:1/run
                        echo 1 > /sys/class/pwm/ehrpwm.2:0/run
                        sleep 0.004
			echo 0 > /sys/class/pwm/ehrpwm.1:1/run
                        echo 0 > /sys/class/pwm/ehrpwm.2:0/run
        done
  echo "$i" #### print the new line ###
done