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26 lines
543 B
26 lines
543 B
# Example using PWM to fade an LED.
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# Note: this does not work on Pico W because it uses Pin(25) for LED output.
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import time
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from machine import Pin, PWM
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# Construct PWM object, with LED on Pin(25).
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pwm = PWM(Pin(25))
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# Set the PWM frequency.
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pwm.freq(1000)
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# Fade the LED in and out a few times.
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duty = 0
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direction = 1
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for _ in range(8 * 256):
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duty += direction
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if duty > 255:
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duty = 255
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direction = -1
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elif duty < 0:
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duty = 0
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direction = 1
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pwm.duty_u16(duty * duty)
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time.sleep(0.001)
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