import os

CSb = 6
UDb = 16
PGOOD = 13

class sysfsGpio:
        def __init__ (self,pin,dir):
                print "init called"
                self.dir = dir
                self.pin = pin
                self.gpio_root = "/sys/class/gpio/"
                self.gpio_pin = self.gpio_root + "gpio" + str(self.pin) + "/"
                print "finished init"
                return

        def __del__(self):
                print "destroying " + self.gpio_pin
                if os.path.exists(self.gpio_pin) :
                        print "exists"

#
# railVarRes and batleveltopct need to be defined to cause exception
# renamining railVarRes to arailVarRes changes the behavior

def batleveltopct(batLevel):
        return
def railVarRes():
        return


def initPorts():
        global udb
        global csb
        global pgood
        #
        # define constants
        #
        INPUT = 0
        OUTPUT = 1
        #
        #
        pgood=sysfsGpio(PGOOD,INPUT)
        csb=sysfsGpio(CSb,OUTPUT)
        udb=sysfsGpio(UDb,OUTPUT)
        #
        # cs* -> 1 to deselect; USb is don't care
        #
        print "initPorts done"
        return

initPorts()
print "alldone"