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| 1 | +# Verify that a thread running on CPU1 can go to lightsleep |
| 2 | +# and wake up in the expected timeframe |
| 3 | +import _thread |
| 4 | +import time |
| 5 | +import unittest |
| 6 | +from machine import lightsleep, Pin |
| 7 | + |
| 8 | +try: |
| 9 | + led = Pin(Pin.board.LED, Pin.OUT) |
| 10 | +except AttributeError: |
| 11 | + led = None |
| 12 | + |
| 13 | +N_SLEEPS = 5 |
| 14 | +SLEEP_MS = 250 |
| 15 | + |
| 16 | +IDEAL_RUNTIME = N_SLEEPS * SLEEP_MS |
| 17 | +MAX_RUNTIME = (N_SLEEPS + 1) * SLEEP_MS |
| 18 | + |
| 19 | + |
| 20 | +class LightSleepInThread(unittest.TestCase): |
| 21 | + def thread_entry(self, is_thread=True): |
| 22 | + led.toggle() |
| 23 | + for _ in range(N_SLEEPS): |
| 24 | + lightsleep(SLEEP_MS) |
| 25 | + led.toggle() |
| 26 | + if is_thread: |
| 27 | + self.thread_done = True |
| 28 | + |
| 29 | + def elapsed_ms(self): |
| 30 | + return time.ticks_diff(time.ticks_ms(), self.t0) |
| 31 | + |
| 32 | + def setUp(self): |
| 33 | + self.thread_done = False |
| 34 | + self.t0 = time.ticks_ms() |
| 35 | + |
| 36 | + def test_cpu0_busy(self): |
| 37 | + _thread.start_new_thread(self.thread_entry, ()) |
| 38 | + # CPU0 is busy-waiting not asleep itself |
| 39 | + while not self.thread_done: |
| 40 | + self.assertLessEqual(self.elapsed_ms(), MAX_RUNTIME) |
| 41 | + self.assertAlmostEqual(self.elapsed_ms(), IDEAL_RUNTIME, delta=IDEAL_RUNTIME / 2) |
| 42 | + |
| 43 | + def test_cpu0_sleeping(self): |
| 44 | + _thread.start_new_thread(self.thread_entry, ()) |
| 45 | + time.sleep_ms(MAX_RUNTIME) |
| 46 | + self.assertTrue(self.thread_done) |
| 47 | + self.assertAlmostEqual(self.elapsed_ms(), IDEAL_RUNTIME, delta=IDEAL_RUNTIME / 2) |
| 48 | + |
| 49 | + def test_cpu0_also_lightsleep(self): |
| 50 | + _thread.start_new_thread(self.thread_entry, ()) |
| 51 | + time.sleep(0.050) # account for any delay in starting the thread |
| 52 | + self.thread_entry(False) # does the same lightsleep loop, doesn't set the done flag |
| 53 | + self.assertTrue(self.thread_done) |
| 54 | + # only one thread can actually be in lightsleep at a time to avoid races, so the total |
| 55 | + # runtime is doubled by doing it on both CPUs |
| 56 | + self.assertAlmostEqual(self.elapsed_ms(), IDEAL_RUNTIME * 2, delta=IDEAL_RUNTIME) |
| 57 | + |
| 58 | + |
| 59 | +if __name__ == "__main__": |
| 60 | + unittest.main() |
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