37 lines
747 B
Python
37 lines
747 B
Python
# Example using PWM to fade an LED.
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import time
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import machine
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from machine import Pin, PWM
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def pwmFade(fadeTime):
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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(fadeTime)
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return 0
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# Construct PWM object, with LED on Pin(25).
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pwm = PWM(Pin(17))
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# Set the PWM frequency.
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pwm.freq(1000)
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print("Fade time is set to .001")
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# Fade the LED in and out a few times.
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pwmFade(.001)
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print("Fade time is set to .01")
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# Fade the LED in and out a few times.
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pwmFade(.01)
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