35 lines
792 B
Python
35 lines
792 B
Python
import time
|
|
from inventor import Inventor2040W, NUM_LEDS
|
|
|
|
"""
|
|
Displays a rotating rainbow pattern on Inventor 2040 W's onboard LED bars.
|
|
|
|
Press "User" to exit the program.
|
|
"""
|
|
|
|
# Constants
|
|
SPEED = 5 # The speed that the LEDs will cycle at
|
|
BRIGHTNESS = 0.4 # The brightness of the LEDs
|
|
UPDATES = 50 # How many times the LEDs will be updated per second
|
|
|
|
# Create a new Inventor2040W
|
|
board = Inventor2040W()
|
|
|
|
# Variables
|
|
offset = 0.0
|
|
|
|
# Make rainbows until the user button is pressed
|
|
while not board.switch_pressed():
|
|
|
|
offset += SPEED / 1000.0
|
|
|
|
# Update all the LEDs
|
|
for i in range(NUM_LEDS):
|
|
hue = float(i) / NUM_LEDS
|
|
board.leds.set_hsv(i, hue + offset, 1.0, BRIGHTNESS)
|
|
|
|
time.sleep(1.0 / UPDATES)
|
|
|
|
# Turn off the LED bars
|
|
board.leds.clear()
|