def update(strip, num_led, num_steps_per_cycle, current_step,
current_cycle):
brightness = round(100 * current_step / num_steps_per_cycle)
lamp = Pixel(255, 0, 0, brightness)
for i in range(start, end + 1):
strip[i] = lamp
return 1 # Repaint
def update(strip, num_led, num_steps_per_cycle, current_step,
current_cycle):
r, g, b = 255, 96, 12
for i in range(start, end + 1):
flicker = randint(0, 40)
strip[i] = Pixel(r - flicker, g - flicker, b - flicker, 100)
return 1 # Repaint
def update(strip, num_led, num_steps_per_cycle, current_step,
current_cycle):
last_step = num_steps_per_cycle - ceil(hold_pct * num_steps_per_cycle)
if current_step > last_step:
return 0
brightness = round(100 * current_step / last_step)
if direction != 1:
# Fade down
brightness = 100 - brightness
for i in range(start, end + 1):
# Copy all the colors and change brightness.
strip[i] = Pixel(*strip[i][0:3], brightness=brightness)
return 1 # Repaint
def next():
nonlocal width, b_step, led, direction
led += direction
if led == end + width:
direction = -1
led = end
if led == start - width:
direction = 1
led = start
bright = 100
for i in range(led, led + (-direction * width), -direction):
if start <= i <= end:
strip[i] = Pixel(255, 0, 0, bright)
bright -= b_step
def update(strip, num_led, num_steps_per_cycle, current_step,
current_cycle):
nonlocal led, direction
led += direction
if led == end + width:
direction = -1
led = end
if led == start - width:
direction = 1
led = start
bright = 100
for i in range(start, end + 1):
strip[i] = Pixel.BLACK
for i in range(led, led + (-direction * width), -direction):
if start <= i <= end:
strip[i] = Pixel(255, 0, 0, bright)
bright -= b_step
return 1 # Repaint
#!/usr/bin/env python3 """Ultra simple sample on how to use the library""" from apa102 import APA102, Pixel import time # Initialize the library and the strip strip = APA102(num_led=80, global_brightness=20, mosi=10, sclk=11, order='rbg') # Turn off all pixels (sometimes a few light up when the strip gets power) strip.clear_strip() # Prepare a few individual pixels through the various APIs. strip[0] = (255, 0, 0) # Red strip[12] = Pixel.BLUE strip[24] = Pixel(red=0xFF, green=0xFF, blue=0xFF, brightness=100) # White strip[36] = (255, 255, 0, 100) # Yellow strip.set_pixel_rgb(40, 0x00FF00) # Green # Copy the buffer to the Strip (i.e. show the prepared pixels) strip.show() # Wait a few Seconds, to check the result time.sleep(20) # Clear the strip and shut down strip.clear_strip() strip.cleanup()