2322d37a9a
Because it requires a different configuration of the pins (in `setUp`). Eg on mimxrt pins used for a `machine.Counter` cannot be read. Signed-off-by: Damien George <damien@micropython.org>
102 lines
2.6 KiB
Python
102 lines
2.6 KiB
Python
# Test machine.Counter implementation
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#
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# IMPORTANT: This test requires hardware connections: the out_pin and in_pin
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# must be wired together.
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try:
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from machine import Counter
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except ImportError:
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print("SKIP")
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raise SystemExit
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import sys
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from machine import Pin
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if "esp32" in sys.platform:
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id = 0
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out_pin = 4
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in_pin = 5
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elif sys.platform == "mimxrt":
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if "Teensy" in sys.implementation._machine:
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id = 0
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out_pin = "D2"
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in_pin = "D3"
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else:
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print("Please add support for this test on this platform.")
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raise SystemExit
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import unittest
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out_pin = Pin(out_pin, mode=Pin.OUT)
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in_pin = Pin(in_pin, mode=Pin.IN)
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def toggle(times):
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for _ in range(times):
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out_pin(1)
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out_pin(0)
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class TestConnections(unittest.TestCase):
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def setUp(self):
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in_pin.init(Pin.IN)
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def test_connections(self):
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# Test the hardware connections are correct. If this test fails, all tests will fail.
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out_pin(1)
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self.assertEqual(1, in_pin())
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out_pin(0)
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self.assertEqual(0, in_pin())
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class TestCounter(unittest.TestCase):
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def setUp(self):
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out_pin(0)
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self.counter = Counter(id, in_pin)
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def tearDown(self):
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self.counter.deinit()
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def assertCounter(self, value):
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self.assertEqual(self.counter.value(), value)
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def test_count_rising(self):
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self.assertCounter(0)
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toggle(100)
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self.assertCounter(100)
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out_pin(1)
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self.assertEqual(self.counter.value(0), 101)
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self.assertCounter(0) # calling value(0) resets
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out_pin(0)
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self.assertCounter(0) # no rising edge
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out_pin(1)
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self.assertCounter(1)
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def test_change_directions(self):
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self.assertCounter(0)
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toggle(100)
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self.assertCounter(100)
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self.counter.init(in_pin, direction=Counter.DOWN)
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self.assertCounter(0) # calling init() zeroes the counter
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self.counter.value(100) # need to manually reset the value
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self.assertCounter(100)
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toggle(25)
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self.assertCounter(75)
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@unittest.skipIf(sys.platform == "mimxrt", "FALLING edge not supported")
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def test_count_falling(self):
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self.counter.init(in_pin, direction=Counter.UP, edge=Counter.FALLING)
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toggle(20)
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self.assertCounter(20)
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out_pin(1)
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self.assertCounter(20) # no falling edge
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out_pin(0)
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self.assertCounter(21)
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self.counter.value(-(2**24))
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toggle(20)
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self.assertCounter(-(2**24 - 20))
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if __name__ == "__main__":
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unittest.main()
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