41 lines
1 KiB
Python
41 lines
1 KiB
Python
# SPDX-FileCopyrightText: 2018 Mikey Sklar for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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import time
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import board
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import pwmio
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# PWM (fading) LEDs are connected on D0, D2 (PWM not avail on D1)
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pwm_leds = board.D2
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pwm = pwmio.PWMOut(pwm_leds, frequency=1000, duty_cycle=0)
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pwm2_leds = board.D0
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pwm2 = pwmio.PWMOut(pwm2_leds, frequency=1000, duty_cycle=0)
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brightness = 0 # how bright the LED is
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fade_amount = 1285 # 2% steping of 2^16
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counter = 0 # counter to keep track of cycles
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while True:
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# And send to LED as PWM level
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pwm.duty_cycle = brightness
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pwm2.duty_cycle = brightness
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# change the brightness for next time through the loop:
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brightness = brightness + fade_amount
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print(brightness)
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# reverse the direction of the fading at the ends of the fade:
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if brightness <= 0:
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fade_amount = -fade_amount
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counter += 1
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elif brightness >= 65535:
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fade_amount = -fade_amount
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counter += 1
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# wait for 15 ms to see the dimming effect
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time.sleep(.015)
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