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"""
This is a simple GPIO manipulation program. It works together
with Sensor board mezzanine and arduino program. The program writes
value 1 (HIGH) to GPIO_A which should be connected to arduino
digital pin 4. Than it reads value from GPIO_B which should be connected
to arduino digital pin 5.
"""
import mraa
import unittest
from time import sleep
class GpioTestCase(unittest.TestCase):
def setUp(self):
# GPIO_A on 96boards
self.output = mraa.Gpio(23)
self.output.dir(mraa.DIR_OUT)
# GPIO_B on 96boards
self.input = mraa.Gpio(24)
self.input.dir(mraa.DIR_IN)
def test_gpio_initial_value(self):
print "Initial input value: %s" % self.input.read()
self.assertEqual(self.input.read(), 0)
def test_gpio_write_high(self):
self.output.write(1)
sleep(10)
print "First read input value (expecting 1): %s" % self.input.read()
self.assertEqual(self.input.read(), 1)
def test_gpio_write_low(self):
self.output.write(0)
sleep(10)
print "Second read input value (expecting 0): %s" % self.input.read()
self.assertEqual(self.input.read(), 0)
if __name__ == '__main__':
print (mraa.getVersion())
unittest.main(verbosity=2, buffer=True)
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