Pi Pico - WS2812 NeoPixel LED Strip

Rotate Rainbow
 
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import array, utime
from machine import Pin
import rp2
from rp2 import PIO, StateMachine, asm_pio

# Configure the number of WS2812 LEDs.
NUM_LEDS = 10
@asm_pio(sideset_init=PIO.OUT_LOW, out_shiftdir=PIO.SHIFT_LEFT, autopull=True, pull_thresh=24)
def ws2812():
    T1 = 2
    T2 = 5
    T3 = 3
    label("bitloop")
    out(x, 1) .side(0) [T3 - 1]
    jmp(not_x, "do_zero") .side(1) [T1 - 1]
    jmp("bitloop") .side(1) [T2 - 1]
    label("do_zero")
    nop() .side(0) [T2 - 1]
    
# Create the StateMachine with the ws2812 program, outputting on Pin(0).
sm = StateMachine(0, ws2812, freq=8000000, sideset_base=Pin(0))

# Start the StateMachine, it will wait for data on its FIFO.
sm.active(1)

# Display a pattern on the LEDs via an array of LED RGB values.
ar = array.array("I", [0 for _ in range(NUM_LEDS)])
print("blue")
for j in range(0, 255):
    for i in range(NUM_LEDS):
        ar[i] = j
    sm.put(ar,8)
    utime.sleep_ms(10)
    
print("red")
for j in range(0, 255):
    for i in range(NUM_LEDS):
        ar[i] = j<<8
    sm.put(ar,8)
    utime.sleep_ms(10)
    
print("green")
for j in range(0, 255):
    for i in range(NUM_LEDS):
        ar[i] = j<<16
    sm.put(ar,8)
    utime.sleep_ms(10)
    
print("white")
for j in range(0, 255):
    for i in range(NUM_LEDS):
        ar[i] = (j<<16) + (j<<8) + j
    sm.put(ar,8)
    utime.sleep_ms(10)
White
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import array, utime
from machine import Pin
import rp2
from rp2 import PIO, StateMachine, asm_pio

# Configure the number of WS2812 LEDs.
NUM_LEDS = 10
@asm_pio(sideset_init=PIO.OUT_LOW, out_shiftdir=PIO.SHIFT_LEFT, autopull=True, pull_thresh=24)
def ws2812():
    T1 = 2
    T2 = 5
    T3 = 3
    label("bitloop")
    out(x, 1) .side(0) [T3 - 1]
    jmp(not_x, "do_zero") .side(1) [T1 - 1]
    jmp("bitloop") .side(1) [T2 - 1]
    label("do_zero")
    nop() .side(0) [T2 - 1]
    
# Create the StateMachine with the ws2812 program, outputting on Pin(0).
sm = StateMachine(0, ws2812, freq=8000000, sideset_base=Pin(0))

# Start the StateMachine, it will wait for data on its FIFO.
sm.active(1)

# Display a pattern on the LEDs via an array of LED RGB values.
ar = array.array("I", [0 for _ in range(NUM_LEDS)])
    
print("white")
for j in range(0, 255):
    for i in range(NUM_LEDS):
        ar[i] = (j<<16) + (j<<8) + j
    sm.put(ar,8)
    utime.sleep_ms(10)
Mark McCorkle