root@silver:/home/frazera# cat electrotest.sh
#!/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=1
let reverse_current_duty_percent=forward_current_duty_percent*2

#setup PWM settings
#       -- ehrpwm.1:0 ( yellow Forward P Channel )

        echo 1 > /sys/class/pwm/ehrpwm.1:0/request
        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/request

#       -- ehrpwm.1:1 ( red linear N Forward Channel )

        echo 1 > /sys/class/pwm/ehrpwm.1:1/request
        echo 0 > /sys/class/pwm/ehrpwm.1:1/duty_percent
        echo 25000 > /sys/class/pwm/ehrpwm.1:1/period_freq
        echo $forward_current_duty_percent > /sys/class/pwm/ehrpwm.1:1/duty_percent
        echo 0 > /sys/class/pwm/ehrpwm.1:1/request

#       -- ehrpwm.2:0 ( brown reverse P Channel )

        echo 1 > /sys/class/pwm/ehrpwm.2:0/request
        echo 0 > /sys/class/pwm/ehrpwm.2:0/duty_percent
        echo 500 > /sys/class/pwm/ehrpwm.2:0/period_freq
        echo 50 > /sys/class/pwm/ehrpwm.2:0/duty_percent
        echo 0 > /sys/class/pwm/ehrpwm.2:0/request

#       -- ehrpwm.2:1 ( green linear N Forward Channel )

        echo 1 > /sys/class/pwm/ehrpwm.2:1/request
        echo 0 > /sys/class/pwm/ehrpwm.2:1/duty_percent
        echo 25000 > /sys/class/pwm/ehrpwm.2:1/period_freq
        echo $reverse_current_duty_percent > /sys/class/pwm/ehrpwm.2:1/duty_percent
        echo 0 > /sys/class/pwm/ehrpwm.2:1/request


root@silver:/home/frazera#




root@silver:/home/frazera# ./electrotest.sh 10 10
Starting Electroplating 10 for 10
root@silver:/home/frazera# cat /sys/class/pwm/ehrpwm.1:0/duty_percent
2500
root@silver:/home/frazera# cat /sys/class/pwm/ehrpwm.1:1/duty_percent
1
root@silver:/home/frazera# cat /sys/class/pwm/ehrpwm.2:1/duty_percent
2
root@silver:/home/frazera# cat /sys/class/pwm/ehrpwm.2:0/duty_percent
2500
root@silver:/home/frazera#