49 lines
1.3 KiB
Python
49 lines
1.3 KiB
Python
import board
|
|
import pulseio
|
|
import time
|
|
|
|
RED_PIN = board.D5 # Red LED pin
|
|
GREEN_PIN = board.D6 # Green LED pin
|
|
BLUE_PIN = board.D3 # Blue LED pin
|
|
|
|
FADE_SLEEP = 10 # Number of milliseconds to delay between changes.
|
|
# Increase to slow down, decrease to speed up.
|
|
|
|
# Define PWM outputs:
|
|
red = pulseio.PWMOut(RED_PIN)
|
|
green = pulseio.PWMOut(GREEN_PIN)
|
|
blue = pulseio.PWMOut(BLUE_PIN)
|
|
|
|
# Function to simplify setting duty cycle to percent value.
|
|
def duty_cycle(percent):
|
|
return int(percent / 100.0 * 65535.0)
|
|
|
|
# Fade from nothing up to full red.
|
|
for i in range(100):
|
|
red.duty_cycle = duty_cycle(i)
|
|
time.sleep(FADE_SLEEP)
|
|
|
|
# Now fade from violet (red + blue) down to red.
|
|
for i in range(100, -1, -1):
|
|
blue.duty_cycle = duty_cycle(i)
|
|
time.sleep(FADE_SLEEP)
|
|
|
|
# Fade from red to yellow (red + green).
|
|
for i in range(100):
|
|
green.duty_cycle = duty_cycle(i)
|
|
time.sleep(FADE_SLEEP)
|
|
|
|
# Fade from yellow to green.
|
|
for i in range(100, -1, -1):
|
|
red.duty_cycle = duty_cycle(i)
|
|
time.sleep(FADE_SLEEP)
|
|
|
|
# Fade from green to teal (blue + green).
|
|
for i in range(100):
|
|
blue.duty_cycle = duty_cycle(i)
|
|
time.sleep(FADE_SLEEP)
|
|
|
|
# Fade from teal to blue.
|
|
for i in range(100, -1, -1):
|
|
green.duty_cycle = duty_cycle(i)
|
|
time.sleep(FADE_SLEEP)
|