#!/usr/bin/env python # Author: Costin Constantin <costin.c.constantin@intel.com> # Copyright (c) 2015 Intel Corporation. # # Permission is hereby granted, free of charge, to any person obtaining # a copy of this software and associated documentation files (the # "Software"), to deal in the Software without restriction, including # without limitation the rights to use, copy, modify, merge, publish, # distribute, sublicense, and/or sell copies of the Software, and to # permit persons to whom the Software is furnished to do so, subject to # the following conditions: # # The above copyright notice and this permission notice shall be # included in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 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()