# SPDX-FileCopyrightText: 2021 Jeff Epler, written for Adafruit Industries
#
# SPDX-License-Identifier: MIT
#
# Adapted from the an example in Appendix C of file:///tmp/mozilla_jepler0/RPi_PiPico_Digital_v10.pdf

import adafruit_pioasm
import board
import rp2pio
import time

led_quarter_brightness = adafruit_pioasm.assemble("""
    set pins, 0 [2]
    set pins, 1
""")

led_half_brightness = adafruit_pioasm.assemble("""
    set pins, 0
    set pins, 1
""")

led_full_brightness = adafruit_pioasm.assemble("""
    set pins, 1
""")

while True:
    sm = rp2pio.StateMachine(led_quarter_brightness,
        frequency=10000, first_set_pin=board.LED)
    time.sleep(1)
    sm.deinit()

    sm = rp2pio.StateMachine(led_half_brightness,
        frequency=10000, first_set_pin=board.LED)
    time.sleep(1)
    sm.deinit()

    sm = rp2pio.StateMachine(led_full_brightness,
        frequency=10000, first_set_pin=board.LED)
    time.sleep(1)
    sm.deinit()