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# Example using PIO to turn on an LED via an explicit exec.
# Note: this does not work on Pico W because it uses Pin(25) for LED output.
#
# Demonstrates:
# - using set_init and set_base
# - using StateMachine.exec
# ruff: noqa: F821 - @asm_pio decorator adds names to function scope
import time
from machine import Pin
import rp2
# Define an empty program that uses a single set pin.
@rp2.asm_pio(set_init=rp2.PIO.OUT_LOW)
def prog():
pass
# Construct the StateMachine, binding Pin(25) to the set pin.
sm = rp2.StateMachine(0, prog, set_base=Pin(25))
# Turn on the set pin via an exec instruction.
sm.exec("set(pins, 1)")
# Sleep for 500ms.
time.sleep(0.5)
# Turn off the set pin via an exec instruction.
sm.exec("set(pins, 0)")
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