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- # See original soft_pwm.py for detailed comments.
- import uasyncio
- from hwconfig import LED
- async def pwm_cycle(led, duty, cycles):
- duty_off = 20 - duty
- for i in range(cycles):
- if duty:
- led.value(1)
- await uasyncio.sleep_ms(duty)
- if duty_off:
- led.value(0)
- await uasyncio.sleep_ms(duty_off)
- async def fade_in_out(LED):
- while True:
- # Fade in
- for i in range(1, 21):
- await pwm_cycle(LED, i, 2)
- # Fade out
- for i in range(20, 0, -1):
- await pwm_cycle(LED, i, 2)
- loop = uasyncio.get_event_loop()
- loop.run_until_complete(fade_in_out(LED))
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