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import os
class gpio (object):
gpioNum = None
def __init__(self, gpioNum, dir, val):
self.gpioNum = gpioNum
self.__export(gpioNum)
self.__set_dir(gpioNum, dir)
if dir == 'out':
self.__set_value(gpioNum, val)
def set_val(self, value):
self.__set_value( self.gpioNum, value)
def __export(self, gpio_number):
if not os.path.isfile("/sys/class/gpio/gpio{}/value".format(gpio_number)):
try:
f = open("/sys/class/gpio/export", "w", newline="\n")
f.write(str(gpio_number))
f.close()
except IOError:
return False, '{}'.format(IOError.errno)
return True
def __unexport(self, gpio_number):
if os.path.isfile("/sys/class/gpio/gpio{}/value".format(gpio_number)):
try:
f = open("/sys/class/gpio/unexport", "w", newline="\n")
f.write(str(gpio_number))
f.close()
except IOError:
return False, '{}'.format(IOError.errno)
return True
def __set_dir(self, gpio_number, dir):
try:
f = open("/sys/class/gpio/gpio{}/direction".format(gpio_number), "r+", newline="\n")
val = f.readline()
if val != dir:
f.write(dir)
f.close()
except IOError:
return False, '{}'.format(IOError.errno)
return True
def __set_value(self, gpio_number, value):
try:
f = open("/sys/class/gpio/gpio{}/value".format(gpio_number), "w", newline="\n")
f.write(str(value))
f.close()
except IOError:
return False, '{}'.format(IOError.errno)
return True
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