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#!/usr/bin/env python
# Author: Costin Constantin <costin.c.constantin@intel.com>
# Copyright (c) 2015 Intel Corporation.
#
# SPDX-License-Identifier: MIT
from __future__ import print_function
import mraa as m
import unittest as u
import os, re, sys
from time import sleep
MRAA_GPIO = 3
@u.skipIf(m.pinModeTest(MRAA_GPIO, m.PIN_GPIO) != True, str(MRAA_GPIO) + "is not a valid Gpio on this platform")
class GpioChecks(u.TestCase):
def setUp(self):
self.pin = m.Gpio(MRAA_GPIO)
self.gpio_path = "/sys/class/gpio/gpio" + str(self.pin.getPin(True))
def tearDown(self):
# dereference pin to force cleanup
self.pin = ""
def test_returning_pin_no(self):
self.pin_no = self.pin.getPin() # i should have the pin no. here as set when initing Gpio class
self.assertEqual(self.pin_no, MRAA_GPIO, "Something wrong happened ... set pin doesn't correspond to retrieved one")
def test_returning_pin_as_on_sys(self):
self.assertTrue(os.path.exists(self.gpio_path))
def test_set_GPIO_as_output(self):
self.pin.dir(m.DIR_OUT)
dir_file = open(self.gpio_path + "/direction")
dir_file_content = dir_file.readline()[:-1]
dir_file.close()
self.assertMultiLineEqual(dir_file_content, "out")
def test_set_GPIO_as_input(self):
self.pin.dir(m.DIR_IN)
dir_file = open(self.gpio_path + "/direction")
dir_file_content = dir_file.readline()[:-1]
dir_file.close()
self.assertMultiLineEqual(dir_file_content, "in")
def test_GPIO_as_output_write_HIGH_level(self):
self.pin.dir(m.DIR_OUT)
self.pin.write(1)
val_file = open(self.gpio_path + "/value")
sysfs_pin_value = val_file.readline()[:-1]
val_file.close()
self.assertEqual(int(sysfs_pin_value),1, "Value doesn't match the HIGH state")
def test_GPIO_as_output_write_LOW_level(self):
self.pin.dir(m.DIR_OUT)
self.pin.write(0)
val_file = open(self.gpio_path + "/value")
sysfs_pin_value = val_file.readline()[:-1]
val_file.close()
self.assertEqual(int(sysfs_pin_value), 0, "Value doesn't match the LOW state")
def test_GPIO_as_input_and_write_HIGH_on_it(self):
self.pin.dir(m.DIR_IN)
res = self.pin.write(1)
self.assertNotEqual(res, m.SUCCESS, "The command should fail")
def test_GPIO_as_input_and_write_LOW_on_it(self):
self.pin.dir(m.DIR_IN)
res = self.pin.write(0)
self.assertGreater(res, 0, "The command should have returned value greater than 0")
if __name__ == '__main__':
u.main()
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