import rp2
from machine import Pin

@rp2.asm_pio(set_init=rp2.PIO.OUT_LOW)
def blink():
    wrap_target()

    set(pins, 1)

    set(x, 31)
    label("loop_on")
    nop()                   [31]
    jmp(x_dec,"loop_on")
    
    set(pins, 0)
    
    set(x,31)
    label("loop_off")
    nop()                   [31]
    jmp(x_dec,"loop_off")
    
    wrap()

# Instantiate a state machine with the blink program, at 2000Hz, with set bound to Pin(0)
sm0 = rp2.StateMachine(0, blink, freq=2000, set_base=Pin(0))

# Instantiate a state machine with the blink program, at 2000Hz, with set bound to Pin(25)
sm1 = rp2.StateMachine(1, blink, freq=2000, set_base=Pin(25))


# Activate the state machine 0 (external led)
sm0.active(1)

# Activate the state machine 1 (builtin led)
sm1.active(1)