Datasheet

import board

import pulseio

import time

from digitalio import DigitalInOut, Direction

# PWM (fading) LEDs are connected on D0 (PWM not avail on D1)

pwm_leds = board.D0

pwm = pulseio.PWMOut(pwm_leds, frequency=1000, duty_cycle=0)

# digital LEDs connected on D2

digital_leds = DigitalInOut(board.D2)

digital_leds.direction = Direction.OUTPUT

brightness = 0 # how bright the LED is

fade_amount = 1285 # 2% steping of 2^16

counter = 0 # counter to keep track of cycles

while True:

# And send to LED as PWM level

pwm.duty_cycle = brightness

# change the brightness for next time through the loop:

brightness = brightness + fade_amount

print(brightness)

# reverse the direction of the fading at the ends of the fade:

if ( brightness <= 0 ):

fade_amount = -fade_amount

counter += 1

elif ( brightness >= 65535 ):

fade_amount = -fade_amount

counter += 1

# wait for 15 ms to see the dimming effect

time.sleep(.015)

# turns on the other LEDs every four times through the fade by

# checking the modulo of the counter.

# the modulo function gives you the remainder of

# the division of two numbers:

if ( counter % 4 == 0 ):

digital_leds.value = True

else:

digital_leds.value = False